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914World.com _ 914World Garage _ 993-914-6 heat exchangers
Posted by: mb911 Nov 27 2024, 08:19 AM
I have been dragging my feet doing these but got a good start this morning. This is a hard process to quote that’s for sure as it is straight up custom. I run this set up on my hot 2.4 with 1.5” sleeves and they work really well. A good solution all the way up to 3.6
Posted by: Steve Nov 27 2024, 08:48 AM
Awesome that you are doing this, but is it less work than your previous heat exchangers? Seems to be a lot of used ones on Ebay for around $600.00 or best offer. I still have a set left over from my 3.6 project.
@http://www.914world.com/bbs2/index.php?showuser=9892 would you trade my 993 heat exchangers to modify my front bumper for a GT?
Posted by: mb911 Nov 27 2024, 09:02 AM
Awesome that you are doing this, but is it less work than your previous heat exchangers? Seems to be a lot of used ones on Ebay for around $600.00 or best offer. I still have a set left over from my 3.6 project.
@http://www.914world.com/bbs2/index.php?showuser=9892 would you trade my 993 heat exchangers to modify my front bumper for a GT?
Yeah would do the trade that’s reasonable. These are less work and I am in complete control of the product as I them entirely myself so no BS.
Posted by: tygaboy Nov 27 2024, 09:25 AM
I'll be helping @http://www.914world.com/bbs2/index.php?showuser=15327 Steve with his 3.6 swap. He has the '95 engine from @http://www.914world.com/bbs2/index.php?showuser=10825 Mark and it has stock heat exchangers on it.
You all know I'm completely ignorant about "regular" engine swaps so help a brother out:
Does Steve need a set of these?
Thanks in advance.
Chris
Posted by: mb911 Nov 27 2024, 09:28 AM
I'll be helping @http://www.914world.com/bbs2/index.php?showuser=15327 Steve with his 3.6 swap. He has the '95 engine from @http://www.914world.com/bbs2/index.php?showuser=10825 Mark and it has stock heat exchangers on it.
You all know I'm completely ignorant about "regular" engine swaps so help a brother out:
Does Steve need a set of these?
Thanks in advance.
Chris
Yes it he wants heat or go with the junky b&b or find an old set of what I made years ago. The 993 heat exchanger is really a nice heat exchanger in general
Posted by: mepstein Nov 27 2024, 09:34 AM
“This is a hard process to quote that’s for sure as it is straight up custom.“
At our shop, the translation is: if we charge you time and materials, the price will sound obscene so we’ll just settle on a price that we can both live with.
I appreciate you doing the set for me. I actually have another set that’s already been modified for my 67, 912/6 build but I guess that’s a lot easier than turning them around for a 914.
Posted by: Cairo94507 Nov 27 2024, 09:44 AM
@http://www.914world.com/bbs2/index.php?showuser=9892 - Ben, can you post an installed picture with them hooked up? Do these flow better than your original, large-tube SS heat exchangers? Will they bolt up to a stock banana muffler? Thanks and Happy Thanksgiving, Michael 
Posted by: mb911 Nov 27 2024, 10:02 AM
@http://www.914world.com/bbs2/index.php?showuser=9892 - Ben, can you post an installed picture with them hooked up? Do these flow better than your original, large-tube SS heat exchangers? Will they bolt up to a stock banana muffler? Thanks and Happy Thanksgiving, Michael
Here is the prototypes on my car. Do they glow more I would no probably not. They are unequal length but 1.625 OD just like my old sets. They connect to a stock muffler that’s the idea.
Posted by: mb911 Nov 27 2024, 10:03 AM
“This is a hard process to quote that’s for sure as it is straight up custom.“
At our shop, the translation is: if we charge you time and materials, the price will sound obscene so we’ll just settle on a price that we can both live with.
I appreciate you doing the set for me. I actually have another set that’s already been modified for my 67, 912/6 build but I guess that’s a lot easier than turning them around for a 914.
I will probably do a second set like you and I discussed. As soon as I find my groove on these the build time will get faster and pay off.
Posted by: worn Nov 27 2024, 04:47 PM
“This is a hard process to quote that’s for sure as it is straight up custom.“
At our shop, the translation is: if we charge you time and materials, the price will sound obscene so we’ll just settle on a price that we can both live with.
I appreciate you doing the set for me. I actually have another set that’s already been modified for my 67, 912/6 build but I guess that’s a lot easier than turning them around for a 914.
I will probably do a second set like you and I discussed. As soon as I find my groove on these the build time will get faster and pay off.
Is there any possibility that you could sell me the unassembled parts and let me try my hand at welding them up? Never mind if that is PITA question.
Warren
Posted by: NARP74 Nov 27 2024, 05:33 PM
I'm in for a set as soon as I get the donors to send you.
Posted by: Root_Werks Nov 27 2024, 05:39 PM
My six conversion originally came with 993 HE's. Nothing as polished as what Ben's done, but do remember they worked well.
These look really clean.
Posted by: mb911 Nov 27 2024, 05:49 PM
“This is a hard process to quote that’s for sure as it is straight up custom.“
At our shop, the translation is: if we charge you time and materials, the price will sound obscene so we’ll just settle on a price that we can both live with.
I appreciate you doing the set for me. I actually have another set that’s already been modified for my 67, 912/6 build but I guess that’s a lot easier than turning them around for a 914.
I will probably do a second set like you and I discussed. As soon as I find my groove on these the build time will get faster and pay off.
Is there any possibility that you could sell me the unassembled parts and let me try my hand at welding them up? Never mind if that is PITA question.
Warren
Once I get the details hammered out for more of a production setup sure
Posted by: NARP74 Nov 27 2024, 06:04 PM
@http://www.914world.com/bbs2/index.php?showuser=9892 do the open ports in your pic get a hose from the engine blower fan? Left open? How is the power and heat? Some people live in cold climates...
Posted by: mb911 Nov 27 2024, 09:16 PM
@http://www.914world.com/bbs2/index.php?showuser=9892 do the open ports in your pic get a hose from the engine blower fan? Left open? How is the power and heat? Some people live in cold climates...
lol I live in Wisconsin you don’t think it gets cold here? Basically the factory ports are shrunk so a standard hose will fit . I then cut a new opening for the heat valves and it works perfectly. It was 40 degrees the last time I was out driving and toasty in the car no problem
Posted by: mb911 Nov 28 2024, 08:58 AM
Starting the adapters. 
Posted by: NARP74 Nov 28 2024, 10:08 AM
The cold remark was for the CA folks that chime in and say they don't need heat, grrrr.
Posted by: mb911 Nov 28 2024, 10:37 AM
The cold remark was for the CA folks that chime in and say don't need heat, grrrr.
Gotcha. Will be adding those ports next.
Posted by: Cairo94507 Nov 28 2024, 10:48 AM
BRRRRRR!!! - It is 43 degrees outside right now; I am at the foothills of the Sierra, in Auburn, CA.
Posted by: mb911 Nov 28 2024, 10:58 AM
BRRRRRR!!! - It is 43 degrees outside right now; I am at the foothills of the Sierra, in Auburn, CA.
30 here
Posted by: mepstein Nov 28 2024, 11:24 AM
You have to figure if they are going to work in a factory 993, they will easily heat up a 914 cabin.
Posted by: NARP74 Nov 28 2024, 12:31 PM
20 and snow this AM
Posted by: mb911 Nov 28 2024, 05:10 PM
20 and snow this AM
We are getting there this weekend
Posted by: NARP74 Nov 28 2024, 06:12 PM
Headed your way!
Posted by: ClayPerrine Nov 29 2024, 06:30 AM
Ben,
How do you deal with having to flip the flanges on the left head exchanger for the 964 engine? Do you move the access tubes for the bolts??
Also, I have a set of these heat exchangers. How much to get them converted???
Posted by: mb911 Nov 29 2024, 07:43 AM
Ben,
How do you deal with having to flip the flanges on the left head exchanger for the 964 engine? Do you move the access tubes for the bolts??
Also, I have a set of these heat exchangers. How much to get them converted???
Clay you have to be very patient and do them with out access tubes. I have been flipping the flanges on these for 25 years now it works but it’s a fresh day kind of thing not after work.
These sets I quoted 1500 to do the conversion on. May go up a little but that’s what I would do them for you for as well. You helped me a ton. Moving forward 2k . It’s a lot of work.
Posted by: horizontally-opposed Nov 29 2024, 11:53 AM
Very interesting project for those of us with six conversions who haven't found existing paths compelling.
Porsche learned a lot about heat exchangers from 2.0 > 3.2 liters, and again in the 964/993 era. Bruce Anderson told me they inspected SSI HEs and tossed those on the pile marked "not invented here," but the later factory HEs learned from the same rust-driven inputs SSI did.
I'm curious about whether these improve or decrease access for valve adjustments vs headers and Dansk's mild steel HEs, also curious about thoughts on flow for engines smaller than 3.6 liters. Asking for a friend with a warm 2.2 making ~200 hp at the flywheel with an SC-ish torque curve courtesy of a little head work and Solex cams. 
There's probably a bigger market for 3.2-3.8, engines that aren't well served by Dansk's offerings so far as I know?
Also curious about impacts, if any, or deleting one side's HE as I don't need a lot of heat—just enough to keep toes warm on yesterday's top-off fun run through crisp cold, and perhaps a windshield clear on longer journeys with the roof on. In example, would deleting the driver's side "box" (to offset the weight of the oil tank and driver, albeit minorly) create unbalanced engine cooling?
It's a given that the carbs will have to be retuned to account for different headers, but the prospect of heat and high quality—not to mention a chance to support one of our own vendors—could end up being very compelling indeed...
Posted by: mb911 Nov 29 2024, 12:35 PM
Very interesting project for those of us with six conversions who haven't found existing paths compelling.
Porsche learned a lot about heat exchangers from 2.0 > 3.2 liters, and again in the 964/993 era. Bruce Anderson told me they inspected SSI HEs and tossed those on the pile marked "not invented here," but the later factory HEs learned from the same rust-driven inputs SSI did.
I'm curious about whether these improve or decrease access for valve adjustments vs headers and Dansk's mild steel HEs, also curious about thoughts on flow for engines smaller than 3.6 liters. Asking for a friend with a warm 2.2 making ~200 hp at the flywheel with an SC-ish torque curve courtesy of a little head work and Solex cams.
There's probably a bigger market for 3.2-3.8, engines that aren't well served by Dansk's offerings so far as I know?Also curious about impacts, if any, or deleting one side's HE as I don't need a lot of heat—just enough to keep toes warm on yesterday's top-off fun run through crisp cold, and perhaps a windshield clear on longer journeys with the roof on. In example, would deleting the driver's side "box" (to offset the weight of the oil tank and driver, albeit minorly) create unbalanced engine cooling?
It's a given that the carbs will have to be retuned to account for different headers, but the prospect of heat and high quality—not to mention a chance to support one of our own vendors—could end up being very compelling indeed...
I run these on my 2.4 with 1.5 inch sleeves in them and they work really well for me. I know you have talked many times about one heat exchanger but why ? If you have 2 of the cores make them both functional and if you don’t hook up the other side so be it. From a valve adjustment standpoint point they are about the same as any other heat exchanger. Nothing is easy while the engine is in the car.
Posted by: Montreal914 Nov 29 2024, 12:46 PM
Very nice looking heat exchangers conversion!
Is there any advantage on these vs. the headers/heat exchangers you used to build?
Posted by: mb911 Nov 29 2024, 01:04 PM
Very nice looking heat exchangers conversion!
Is there any advantage on these vs. the headers/heat exchangers you used to build?
I think the ones I use to build and then contract were probably better but these are a great option. After the exhaust business went sideways I got rid of anything that resembled it and having these on a short stroke turbo years ago made this natural
Posted by: mb911 Nov 29 2024, 02:21 PM
Ben,
How do you deal with having to flip the flanges on the left head exchanger for the 964 engine? Do you move the access tubes for the bolts??
Also, I have a set of these heat exchangers. How much to get them converted???
@http://www.914world.com/bbs2/index.php?showuser=1143
Is the 964 head drilled and tapped for either direction flange? I thought they were so you could use any flange rotation. Rotating the flanges is the biggest PIA if not necessary that saves a bunch of time and money.
Posted by: Thunderchief Nov 29 2024, 02:26 PM
I'm the customer that Ben is making these for. I'm sure it will be another masterpiece. It's for my 993 powered GT Tribute that currently has regular headers on them. I'm looking forward to having some heat in the cabin for those chilly days.
Posted by: mb911 Nov 29 2024, 02:35 PM
I'm the customer that Ben is making these for. I'm sure it will be another masterpiece. It's for my 993 powered GT Tribute that currently has regular headers on them. I'm looking forward to having some heat in the cabin for those chilly days.
1 of the 3 currently. And I am excited to be getting them done. Ordered more parts today for them. Will have them Sunday and will spend some more time this week on them
Posted by: ClayPerrine Nov 29 2024, 04:01 PM
Ben,
How do you deal with having to flip the flanges on the left head exchanger for the 964 engine? Do you move the access tubes for the bolts??
Also, I have a set of these heat exchangers. How much to get them converted???
@http://www.914world.com/bbs2/index.php?showuser=1143
Is the 964 head drilled and tapped for either direction flange? I thought they were so you could use any flange rotation. Rotating the flanges is the biggest PIA if not necessary that saves a bunch of time and money.
Mine is not setup for 4 stud pads on the heads. So I am stuck with the rotated flanges.
I have a set of 993 heat exchangers that have the flanges already rotated. But I want to redo the way the heater boxes attach and the output flanges.
Clay
Posted by: horizontally-opposed Nov 29 2024, 05:12 PM
I run these on my 2.4 with 1.5 inch sleeves in them and they work really well for me.
^ Cool, and good data point.
I'd imagine they're good for a warm 2.2 then as well, perhaps sacrificing a little torque down low while gaining a little top end power. I'm sure a bit of dyno time would be required to readjust the carbs, but that would be well worth it to regain substantive cabin heat.
Have long been weighing $3k for non-factory HEs vs other paths such as heated seats, gas heater, electric heat, etc. Most solutions have been tough to justify for an occasional use car, and one mainly used on warm days. I doubt I'm alone in that, so I'd guess there is a reasonably sized addressable market for a solution that presents real quality and real value. This seems promising.
Reasons would include:
Weight & complexity (HE shell + flapper valve + hoses + linkage)
Need for my use case vs 914 as a daily car in period (I found SSIs oversupplied my cabin with heat with a four; I was often turning the heat down on cold days with the roof off, and I also remember heat bleed from the longitudinals on very hot days even after buying new flapper valves, to the point of turning on the heat at the windshield in the hope if would bleed off—so cutting off 50% of the source is interesting to me)
Access (agree few things are easy with the six in the car)
Posted by: mb911 Nov 29 2024, 06:54 PM
Ben,
How do you deal with having to flip the flanges on the left head exchanger for the 964 engine? Do you move the access tubes for the bolts??
Also, I have a set of these heat exchangers. How much to get them converted???
@http://www.914world.com/bbs2/index.php?showuser=1143
Is the 964 head drilled and tapped for either direction flange? I thought they were so you could use any flange rotation. Rotating the flanges is the biggest PIA if not necessary that saves a bunch of time and money.
Mine is not setup for 4 stud pads on the heads. So I am stuck with the rotated flanges.
I have a set of 993 heat exchangers that have the flanges already rotated. But I want to redo the way the heater boxes attach and the output flanges.
Clay
Well let me know I might be able to help you with the flanges already rotated that saves a bunch of time and money
Posted by: jc73-914 Nov 30 2024, 06:00 PM
Hi Ben, did you use the OEM type head to HE gasket on your 2.4 set up?
John
Posted by: mb911 Nov 30 2024, 07:18 PM
Hi Ben, did you use the OEM type head to HE gasket on your 2.4 set up?
John
Yes
Posted by: jc73-914 Dec 1 2024, 09:27 AM
Great, thx…looking forward to more stories on this set up.
J.
Posted by: mb911 Dec 10 2024, 02:08 PM
Posted by: mb911 Dec 10 2024, 03:14 PM
Posted by: burton73 Dec 10 2024, 05:32 PM
Ben @http://www.914world.com/bbs2/index.php?showuser=9892 These are a thing of beauty. Maybe this is a good model for you to make some money for a great product for the guys that are in need of Heat Exchangers in there big 6’s
Your work is really impressive!
Best Bob B
Posted by: mb911 Dec 10 2024, 05:55 PM
Ben @http://www.914world.com/bbs2/index.php?showuser=9892 These are a thing of beauty. Maybe this is a good model for you to make some money for a great product for the guys that are in need of Heat Exchangers in there big 6’s
Your work is really impressive!
Best Bob B
I hope so. They are a pretty good value
Posted by: NARP74 Dec 10 2024, 06:55 PM
Purdy!
Posted by: mepstein Dec 10 2024, 07:55 PM
Any time Ben has mentioned something he wants or is willing to make, I’ve always said I’ll take one. This is no different. Even though his product line is getting cut way back, the 914 community has really benefited over the past ten years and I’m really grateful for what he’s contributed.
Posted by: Graydingo Dec 11 2024, 11:42 AM
Agreed^ These might be a good value as I think I have a set of these a friend was going to give me. There seems to be a fair amount of take offs so the cores might be easily available for low cost.
Posted by: mb911 Dec 11 2024, 12:04 PM
Agreed^ These might be a good value as I think I have a set of these a friend was going to give me. There seems to be a fair amount of take offs so the cores might be easily available for low cost.
The biggest issue so far is finding reasonable cores. The ones sent to me by clients so far have cost them about $500 and then they are into me for about $1500 (supply chain issues changing pricing which equals more time on the next sets I do) your in $2000 pretty easily
Posted by: mb911 Dec 11 2024, 12:55 PM
Posted by: Cairo94507 Dec 11 2024, 01:00 PM
An excellent option as Ben's original heat exchangers are no longer available.
Posted by: NARP74 Dec 11 2024, 02:01 PM
Where is the other heat port after you are done? Did you show it in the older pics?
Posted by: mepstein Dec 11 2024, 02:11 PM
Looks great.
Posted by: mb911 Dec 11 2024, 02:24 PM
Where is the other heat port after you are done? Did you show it in the older pics?
Here are the prototypes on my car.
Posted by: mb911 Dec 15 2024, 12:05 PM
Minor modifications for clearance 
Posted by: Gary Dec 17 2024, 08:54 AM
Agreed^ These might be a good value as I think I have a set of these a friend was going to give me. There seems to be a fair amount of take offs so the cores might be easily available for low cost.
The biggest issue so far is finding reasonable cores. The ones sent to me by clients so far have cost them about $500 and then they are into me for about $1500 (supply chain issues changing pricing which equals more time on the next sets I do) your in $2000 pretty easily
Saw this on Pelican. No association. May help someone interested: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1171412-993-heat-exchangers.html.
Posted by: mb911 Dec 17 2024, 08:59 AM
Agreed^ These might be a good value as I think I have a set of these a friend was going to give me. There seems to be a fair amount of take offs so the cores might be easily available for low cost.
The biggest issue so far is finding reasonable cores. The ones sent to me by clients so far have cost them about $500 and then they are into me for about $1500 (supply chain issues changing pricing which equals more time on the next sets I do) your in $2000 pretty easily
Saw this on Pelican. No association. May help someone interested: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1171412-993-heat-exchangers.html.
Those Gillett style which I don’t think I can make work. I may try to buy them and see if I can make them work
Posted by: mepstein Dec 17 2024, 12:27 PM
Agreed^ These might be a good value as I think I have a set of these a friend was going to give me. There seems to be a fair amount of take offs so the cores might be easily available for low cost.
The biggest issue so far is finding reasonable cores. The ones sent to me by clients so far have cost them about $500 and then they are into me for about $1500 (supply chain issues changing pricing which equals more time on the next sets I do) your in $2000 pretty easily
Saw this on Pelican. No association. May help someone interested: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1171412-993-heat-exchangers.html.
Those Gillett style which I don’t think I can make work. I may try to buy them and see if I can make them work
I still have a set coming your way.
Posted by: NARP74 Dec 17 2024, 01:17 PM
@http://www.914world.com/bbs2/index.php?showuser=10825 what are you getting the cores for? I have only looked on ebay and they seem for go for $600ish.
Posted by: mepstein Dec 17 2024, 01:49 PM
@http://www.914world.com/bbs2/index.php?showuser=10825 what are you getting the cores for? I have only looked on ebay and they seem for go for $600ish.
Mostly from engines that I’ve sold but I’d say $300-400 is what I would pay. I would place a wtb on pelican (careful of scammers) and rennlist
Posted by: Steve Dec 17 2024, 04:52 PM
Mine are bischop. Looks like a dent in the corner. But it shouldn’t affect it.
Posted by: mb911 Dec 19 2024, 05:05 PM
Mine are bischop. Looks like a dent in the corner. But it shouldn’t affect it.
Pretty common
Posted by: mb911 Dec 19 2024, 05:05 PM
Posted by: infraredcalvin Dec 19 2024, 08:55 PM
Agreed^ These might be a good value as I think I have a set of these a friend was going to give me. There seems to be a fair amount of take offs so the cores might be easily available for low cost.
The biggest issue so far is finding reasonable cores. The ones sent to me by clients so far have cost them about $500 and then they are into me for about $1500 (supply chain issues changing pricing which equals more time on the next sets I do) your in $2000 pretty easily
Saw this on Pelican. No association. May help someone interested: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1171412-993-heat-exchangers.html.
Those Gilletstyle which I don’t think I can make work. I may try to buy them and see if I can make them work
Iv’e got a currently unused set of Gillets, with flipped flanges. I’d be willing to loan to you for R&D purposes…I’m sure we could work out something. PM me if you are interested…
On another note, have you thought of keeping the flanges on and making a bolt in 2ndary? I know it’s another leak joint, but seems removing the collector/reducer would simplify the fab work and provide stress relief point for that long exhaust run…
Posted by: mb911 Dec 20 2024, 05:00 AM
Agreed^ These might be a good value as I think I have a set of these a friend was going to give me. There seems to be a fair amount of take offs so the cores might be easily available for low cost.
The biggest issue so far is finding reasonable cores. The ones sent to me by clients so far have cost them about $500 and then they are into me for about $1500 (supply chain issues changing pricing which equals more time on the next sets I do) your in $2000 pretty easily
Saw this on Pelican. No association. May help someone interested: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1171412-993-heat-exchangers.html.
Those Gilletstyle which I don’t think I can make work. I may try to buy them and see if I can make them work
Iv’e got a currently unused set of Gillets, with flipped flanges. I’d be willing to loan to you for R&D purposes…I’m sure we could work out something. PM me if you are interested…
On another note, have you thought of keeping the flanges on and making a bolt in 2ndary? I know it’s another leak joint, but seems removing the collector/reducer would simplify the fab work and provide stress relief point for that long exhaust run…
Mine on my car are exactly that way. I choose welded over bolt on these because it allows a better angle towards the flange. As far as R&D goes I really don’t need a set to R&D but if you want a set converted I am your guy.
Posted by: Cairo94507 Dec 20 2024, 10:09 AM
Jesus, those are beautiful Ben. You always knock it out of the park.
Posted by: mb911 Dec 20 2024, 01:56 PM
Jesus, those are beautiful Ben. You always knock it out of the park.
I am trying. They could use to be glass beaded that would make them look great
Posted by: mepstein Dec 20 2024, 03:03 PM
Jesus, those are beautiful Ben. You always knock it out of the park.
I am trying. They could use to be glass beaded that would make them look great
I’ll do that and post some pics.
Posted by: mlindner Dec 20 2024, 05:15 PM
Beautiful Ben. Now I wish I had a 3.6L. Best, Mark
Posted by: technicalninja Dec 20 2024, 05:26 PM
Are these limited to big engines only?
I thought the bolt pattern and spacing of exhaust ports had never changed.
Now, I do understand if the problem is "TOO BIG", but I thought they'd bolt up to any air cooled six.
Once again Ben displays excellence in application...
Posted by: mb911 Dec 20 2024, 07:35 PM
Are these limited to big engines only?
I thought the bolt pattern and spacing at exhaust ports has never changed.
Now, I do understand if the problem is "TOO BIG", but I thought they'd both up to any air cooled six.
Once again Ben displays excellence in application...
I use them on my 2.4s engine but sleeved them 1.5” for the first few inches
Posted by: mb911 Dec 21 2024, 12:05 PM
Well 2 sets shipped out yesterday, ordered a bunch of stainless steel parts and ready for the next 3/4 sets
Posted by: Cairo94507 Dec 21 2024, 12:24 PM
What is the difference between the Gillette and the Bischoff 993 heat exchangers? How can I tell what my '95 3.6 had?
Posted by: saladin Dec 21 2024, 01:02 PM
What is the difference between the Gillette and the Bischoff 993 heat exchangers? How can I tell what my '95 3.6 had?
@http://www.914world.com/bbs2/index.php?showuser=9712 ,
Bischoff
Gillet
Ken
Posted by: technicalninja Dec 21 2024, 01:20 PM
Thanks for the pics of both styles!
Makes it easy to see why Ben chose to cut the flange off.
It's not a huge angularity change but it does get rid of 10-20 degrees of bend TWICE!
Now, from those pics I'd be prone to want to use the "Gillet" version over the other.
It looks like the individual runners might be straighter at the collector (hard to see this in the pic) and the first added section from Ben might be already there on the Gillet.
To me it looks like the Gillet version would be easier to do...
@http://www.914world.com/bbs2/index.php?showuser=9892
Which style do you prefer and why?
Posted by: Cairo94507 Dec 21 2024, 01:34 PM
@http://www.914world.com/bbs2/index.php?showuser=8125 - Thank you very much. Ahhh... now I see. Yes, I agree, the Gillette version seems to be the better version.
Posted by: mepstein Dec 21 2024, 02:09 PM
@http://www.914world.com/bbs2/index.php?showuser=8125 - Thank you very much. Ahhh... now I see. Yes, I agree, the Gillette version seems to be the better version.
That’s the opposite of what Ben told me. I don’t know his reasoning. Sometimes I ask him why for my own education but I typically go with his preference- like 99.9% of the time.
Secondly, I’ve only seen the Bichoff on the engines I’ve bought and sold. I’m using a set that came to me with the flanges already flipped for my 67, 912-6. They are Bichoff’s as well.
Posted by: technicalninja Dec 21 2024, 02:29 PM
@http://www.914world.com/bbs2/index.php?showuser=8125 - Thank you very much. Ahhh... now I see. Yes, I agree, the Gillette version seems to be the better version.
That’s the opposite of what Ben told me. I don’t know his reasoning. Sometimes I ask him why for my own education but I typically go with his preference- like 99.9% of the time.
Secondly, I’ve only seen the Bichoff on the engines I’ve bought and sold. I’m using a set that came to me with the flanges already flipped for my 67, 912-6. They are Bichoff’s as well.
That is why I tagged him.
I WANT to learn, I NEED to learn, It's a disease!
Ben's answer is what I need...
Posted by: Front yard mechanic Dec 21 2024, 02:56 PM
Better see a doctor
Posted by: technicalninja Dec 21 2024, 03:05 PM
Better see a doctor
It would be a Mental Health Professional...
A GOOD one.
I KNOW what I need.
An emotional support animal!
A cheetah...
Posted by: mb911 Dec 21 2024, 03:30 PM
Bischoff are easier to convert. I am in process of buying some Gillett to try and convert as well but not sure there is enough room. I am buying them cheap enough for the risk.
Posted by: Cairo94507 Dec 22 2024, 08:41 AM
Always learning...
Posted by: NARP74 Dec 22 2024, 11:09 AM
What hanger and muffler clamp are used for these?
Posted by: mb911 Dec 22 2024, 12:14 PM
What hanger and muffler clamp are used for these?
Stock
Posted by: NARP74 Dec 22 2024, 12:25 PM
Stock 1.7, 1.8, 2.0?
Posted by: mb911 Dec 22 2024, 12:57 PM
Stock 1.7, 1.8, 2.0?
Sorry 914-6 and 2.0 are the same bracket
Posted by: mb911 Dec 27 2024, 08:22 AM
Second batch
Posted by: mb911 Jan 21 2025, 10:58 AM
Another 2 sets and a GT bumper
Posted by: Steve Jan 21 2025, 11:10 AM
That is awesome!! Thanks for doing this and supporting us with great products and options!
Posted by: mb911 Jan 22 2025, 12:45 PM
I am happy to be able to offer them.
Posted by: mb911 Jan 22 2025, 01:02 PM
The service is now listed https://914-6werkshop.com/product/993-914-6-heat-exchanger-conversion-service/
Posted by: NARP74 Jan 22 2025, 01:06 PM
Lovely. On my very near list.
Posted by: mb911 Jan 22 2025, 06:22 PM
Lovely. On my very near list.
I might have another set of cores available just let me know
Posted by: ClayPerrine Jan 23 2025, 06:04 AM
Can you do a set with just the collector tapering down to a 911 style two bolt flange?
I need to be able to tuck the pipes in close to the transmission, and add a straight through muffler in them. So this is for packaging reasons.
Thanks.
Posted by: mb911 Jan 23 2025, 03:45 PM
Can you do a set with just the collector tapering down to a 911 style two bolt flange?
I need to be able to tuck the pipes in close to the transmission, and add a straight through muffler in them. So this is for packaging reasons.
Thanks.
So terminating much earlier as in closer the merge the better? Yes for sure.
Posted by: ClayPerrine Jan 24 2025, 01:15 PM
Can you do a set with just the collector tapering down to a 911 style two bolt flange?
I need to be able to tuck the pipes in close to the transmission, and add a straight through muffler in them. So this is for packaging reasons.
Thanks.
So terminating much earlier as in closer the merge the better? Yes for sure.
Terminated right at the end of the collector in a 2 bolt 911 flange.
How much?? They already had the flanges reclocked to fit the 964 engine.
Clay
Posted by: mb911 Feb 11 2025, 07:31 AM
Can you do a set with just the collector tapering down to a 911 style two bolt flange?
I need to be able to tuck the pipes in close to the transmission, and add a straight through muffler in them. So this is for packaging reasons.
Thanks.
So terminating much earlier as in closer the merge the better? Yes for sure.
Terminated right at the end of the collector in a 2 bolt 911 flange.
How much?? They already had the flanges reclocked to fit the 964 engine.
Clay
About $100 bucks in parts that’s your cost
Posted by: mb911 Feb 11 2025, 07:32 AM
I have another few sets in the works. I know I was talking to someone about a set but lost their information. If you need a set let me know
Posted by: Gary Feb 19 2025, 10:28 AM
While parts trolling for a few LWB parts, I saw this listing: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1174129-993-bischoff-heat-exchangers-pair-early-95-production.html.
Posted by: mb911 Feb 19 2025, 04:09 PM
While parts trolling for a few LWB parts, I saw this listing: https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1174129-993-bischoff-heat-exchangers-pair-early-95-production.html.
Thanks I am flush on cores right now but a good deal for someone as those are nice
Posted by: mb911 Mar 8 2025, 08:25 AM
figured out how to make Gillett heat exchangers to work.
Posted by: mb911 Mar 16 2025, 04:27 PM
Who needs a set? I have one more set of cores. Let me know if anyone needs a set.
Posted by: ClayPerrine Mar 17 2025, 02:36 PM
Who needs a set? I have one more set of cores. Let me know if anyone needs a set.
I am going to get mine shipped to you rework.
Posted by: mb911 Mar 17 2025, 08:33 PM
Who needs a set? I have one more set of cores. Let me know if anyone needs a set.
I am going to get mine shipped to you rework.
Sounds good
Posted by: mb911 Apr 29 2025, 01:42 PM
Last set I had I finished today. I have no more cores so if anyone wants to make a deal on this set let me know.
Clay yours are next
Posted by: mb911 Jun 30 2025, 05:01 AM
I am still doing these. If anyone needs a set done let me know
Posted by: mb911 Aug 20 2025, 04:33 PM
Bump.
Posted by: mb911 Jan 19 2026, 09:45 AM
Doing more sets for spring. Anyone need a set done?
Posted by: mb911 Apr 4 2026, 09:05 AM
Bump I am looking to do a few sets let me know if anyone is in need
Posted by: mb911 Apr 29 2026, 07:05 AM
I have a set of near perfect cores. If anyone wants a set let me know
Posted by: mb911 Aug 19 2026, 11:47 AM
I have a few sets almost done let’s make a deal maybe a package with some other items
Posted by: Luke M Aug 19 2026, 04:14 PM
I have a few sets almost done let’s make a deal maybe a package with some other items
Pm me what you're thinking on price.
Posted by: mb911 Aug 25 2026, 06:14 AM
Still have a few sets not spoken for. Prices vary depending on on the cores I used
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