A few 6cyl conversion questions |
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A few 6cyl conversion questions |
tornik550 |
Nov 10 2014, 06:23 PM
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#1
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
So I have had years of fun working on my 4 cyl however a few weeks ago I saw an ad in the classifieds section for a 1970 911e 2.2l engine w/zenith carbs for sale. I decided to buy it. I never had any plans for converting to a 6 cyl until now.
Here are a few basic 6 cyl conversion questions- 1. What is the best motor mount to use? 2. What size headers should I buy (1.5")? 3. What oil tank should I buy (I don't care about originality, just looking for best combination of function to cost)? 4. Are stock 1970 911e pressure plates usable on 914 side shift transmissions (the pressure plate looks flat- it doesn't look like a 914 pressure plate)? |
GeorgeRud |
Nov 10 2014, 06:43 PM
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#2
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
It's a fun project!
I'd stick with the factory style oil tank, though there are folks making reproduction ones that should work fine. If the engine has a flat flywheel, you can get an adapter ring to use it with the 914 transmission/clutch package. The center type engine mounts seem to be the best, most popular. Check out the ones made by Patrick Racing and also the one available on our host's site and choose which you like. Both are good, or you can choose the old 'Quick Six'mount if you want a cheaper version that also works. The headers should work fine with that engine ( but obviously you'll lose heat/defrost by using them). Our host has a nice tech article explaining the conversion process. |
EdwardBlume |
Nov 10 2014, 07:30 PM
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#3
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914 Wizard Group: Members Posts: 12,338 Joined: 2-January 03 From: SLO Member No.: 81 Region Association: Central California |
I believe Rich Johnson has some conversion parts, in particular a weld in mount. The oil tank just needs to fit and function. Pencil out your dream build and go for it!
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Heeltoe914 |
Nov 10 2014, 07:44 PM
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#4
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Senior Member Group: Members Posts: 1,135 Joined: 31-January 06 From: Tujunga Calif, Member No.: 5,506 |
Center type mounts are the best IMHO.
If you care about resale try to get a stock tank $$$$. Also If your trying to keep your car kind of original stock tank looks best. Headers 1.5,, Stock 2.2?? a new 6 spring disk and your good to go with stock tire size . Resurface flywheel. |
Heeltoe914 |
Nov 10 2014, 07:44 PM
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#5
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Senior Member Group: Members Posts: 1,135 Joined: 31-January 06 From: Tujunga Calif, Member No.: 5,506 |
Drive safe. Think about bigger brakes please.
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mepstein |
Nov 10 2014, 08:30 PM
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#6
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914-6 GT in waiting Group: Members Posts: 19,325 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
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Dr Evil |
Nov 10 2014, 08:46 PM
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#7
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Ah, jeez. Here we go. (IMG:style_emoticons/default/wink.gif)
When are you bringing it down so you have room? I may have some parts. |
Cap'n Krusty |
Nov 10 2014, 11:10 PM
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#8
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Unless you go for something aftermarket, the stock design clutch is the one you have to go with. A 2.2 clutch is a "pull type",. You would have to use the 2.2 flywheel, mega-bucks disc, cover, and release bearing, and you'll have to replace the pivot ball with a different type, moving it to a different location. You'll also need a (NLA) clutch fork and a different clutch cable. Other than that, the swap is cheap and easy ...
The Cap'n |
Dave_Darling |
Nov 11 2014, 12:25 AM
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#9
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
For the oil tank, the one with the best $$/useability ratio is a used one. Failing that, a cylinder tank can be relatively cheap--but you have to find a place to put it, which can be a challenge. And it won't look stock.
I don't like the "quick six" mounts (they bolt to the -4 motor mount pods) because they can interfere with shift rods, exhaust, etc., and some of them are somewhat under-engineered. I think the mounts that weld to the bulkhead are the best way to go. Patrick, Rich Johnson, and others make some. Pelican sells at least one type. I think McMark is making one as well? Or was that just a single prototype? Exhaust means either original heat exchangers (bring $$$) or headers (lose your heat). The B&B stainless 914-6 exchangers don't seem to fit very well and are probably not worth the bother. Use the 914-6 clutch setup, which is the same as the 1969 911T setup. --DD |
Steve |
Nov 11 2014, 08:46 AM
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#10
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914 Guru Group: Members Posts: 5,619 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California |
You can run the 2.0 six flywheel and clutch up to a 2.7 motor. I ran this combo for years with my 2.7 with no issues.
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Mark Henry |
Nov 11 2014, 09:05 AM
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#11
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Unless you go for something aftermarket, the stock design clutch is the one you have to go with. A 2.2 clutch is a "pull type",. You would have to use the 2.2 flywheel, mega-bucks disc, cover, and release bearing, and you'll have to replace the pivot ball with a different type, moving it to a different location. You'll also need a (NLA) clutch fork and a different clutch cable. Other than that, the swap is cheap and easy ... The Cap'n I have these parts that I'm not going to use, I went with the conversion 228mm bus set-up instead. The PP is not in good shape, flaking on the edges. It's the aluminum shoe and would need to be re-coated. I'm not sure what Porsche used on this, Nikasil maybe? To use this you really need a 911-901 trans housing. I'm using the DWD tank, I think the Patrick tank is the same, expensive but nice. Still less than a good real /6 tank. |
Cap'n Krusty |
Nov 11 2014, 10:03 AM
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#12
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
The 2.0 aluminum pressure plate is the "S" plate. Both the flywheel and the PP were plated with copper. Running the 2.0 flywheel on a 2.4/2.7 is fine, and works well, but you have to replace the TDC and the 30/35 degree marks because the crankshaft bolts are clocked differently. Be sure to use the correct flywheel bolts, too.
The Cap'n |
MikeSpraggi |
Nov 11 2014, 10:33 AM
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#13
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Senior Member Group: Members Posts: 781 Joined: 7-February 05 From: Silver Spring, Md Member No.: 3,570 Region Association: MidAtlantic Region |
Stock oil tank placement is how the car was engineered....good design. A stock type tank that doesn't leak will serve you well. 1.5 headers are fine. If you need heat, it will be $$$ to find a good fitting pair of exchangers. Not so bad if you don't need heat. I have a Patrick weld in engine mount that I am VERY happy with. And yes, get at least stock /6 type brakes. I have '69 aluminum calipers up front and SC calipers in the rear with the parking brake....this is on my track car. Stopping has never been an issue.
Great thing about these conversions to a 911 engine is that they have been done so many times and for so long that you don't HAVE to reinvent the proverbial wheel. |
MJHanna |
Nov 11 2014, 02:24 PM
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#14
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Does this 911 make my butt look big? Group: Members Posts: 805 Joined: 23-January 03 From: Lowry Crossing, Texas Member No.: 185 |
I would love to find a used 914-6 oil tank. I've been looking for weeks. (IMG:style_emoticons/default/headbang.gif)
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Mark Henry |
Nov 11 2014, 05:31 PM
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#15
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I would love to find a used 914-6 oil tank. I've been looking for weeks. (IMG:style_emoticons/default/headbang.gif) They come up, but be willing to wait months. Nice thing about the DWD tank is all the fittings are stock. |
McMark |
Nov 11 2014, 08:36 PM
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#16
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
DWD tanks and not being made anymore. Patrick Motorsports makes a similar version but not nearly as nice.
Rich Johnson or MadDog mounts are my favorite. I made a stock replica mount but simply don't have the time to produce them for sale. |
Dr Evil |
Nov 11 2014, 08:48 PM
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#17
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Send me your transmission! Group: Members Posts: 23,002 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
(IMG:style_emoticons/default/agree.gif) I like those mounts the best.
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tornik550 |
Nov 11 2014, 08:50 PM
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#18
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Senior Member Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None |
I have been looking around and all I can find is the Patrick oil tank. Are there any other options if DWD tanks are not being made anymore?
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GeorgeRud |
Nov 11 2014, 10:00 PM
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#19
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
Is the factory tank NLA?
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Mark Henry |
Nov 11 2014, 10:09 PM
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#20
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
DWD tanks and not being made anymore. Patrick Motorsports makes a similar version but not nearly as nice. Rich Johnson or MadDog mounts are my favorite. I made a stock replica mount but simply don't have the time to produce them for sale. What is the major differences wit the Patrick tank vs the DWD? I was assuming Patrick tanks (looks similar) were a run of DWD tanks or did they just copy them? |
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