6 heat exchangers,, anybody built 'em? Options

[lapuwali]

QUOTE (goose2 @ May 31 2005, 11:23 AM)

If you had a thermostat on the external cooler, it would probably be closed in cold weather when you need heat the most....but you'd have lots of heat on hot days. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)

Run it in place of the on-engine cooler, with an electric fan to force air through it. Have a flapper valve controllable with the stock lever to direct exhaust air into the heater tube or out onto the ground, just like the HE setup. No overcooling the oil, and it should be at least 170-180d even on cold(ish) days, which should at least be enough to demist the windscreen. It's rather elaborate, but you're not stuck with using or making exhaust heat exchangers. Running the only cooler externally also helps one of the common stumbling blocks in doing a /6 conversion, which is getting the oil tank plumbing to fit within the suspension.

[Dr Evil]

Here is what I had in mind. Mine has twice the length of the one Dan did, I think. It would consist of some high grade steel tubing that draws from the usual place off of the fan and unloads at the same place in the rockers. Tenatively. I am sure some mods will have to be made to avoid shifters and such, but I still do not see why this would not work.

[IronHillRestorations]

QUOTE (ss6 @ May 31 2005, 08:53 AM)

I was one of those few who bought the B&B headers, they were the most expensive purchase in my conversion project. I don't recommend them, the fitment was poor, the boxes block access to the header studs, and there are air leaks between the tubes and the boxes.

(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif)

I've sold about six sets of the B&B, and won't sell any more. Too many problems. For the kind of money they get, they should fit right and give more heat.

GHL is making some stainless headers with heat now. I haven't got a set in my hands though to see how good they fit, but they look better than Billy's bull.

I had a conversion customer in Memphis who was going to try the oil cooler/heater core approach. Don't know if it ever happended though.

No doubt a factory style heat exchanger system is the most efficient, but......

On a different approach, I've got a barely used Webasto gas heater that I'd like to use on a conversion some day. Now those things put out heat!

[Root_Werks]

Here is what I did on the flared orange 914-6. Used a stock electric fan on each side.

[Root_Werks]

I even labeled the arrows blue for cold air coming in. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

[Root_Werks]

And the red arrows as it heats up.

[Root_Werks]

Really, the system worked great until you hit the freeway and the tube I welded to the headers cooled down a little. Then the air was luke warm, not hot anymore. I tried welding on a heatshield, which helped, a little.

I will be trying something different though. Watch for it. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

[Dr Evil]

Dan,
I noticed (I think I did (IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif) ) that your set up only attaches at one spot on the header. We are needing to work in the reverse of what we are used to, i.e. conserve heat, not release it. If you just bent the pipe to match the header and welded the whole length of the header where the pipe is, you would have much better heat transfer and I would imagine that the cooling down problem would dissappear. I bet that you already knew that/thought about it. Just putting it out.

Also, since I am using the wall mount I will have less constriction issues with routing the hose.

Keep it coming. (IMG:http://www.914world.com/bbs2/html/emoticons/wavey.gif)

I bet that if you used a smaller diameter pipe and routed it like my diagram shows, you would melt stuff. I am thinking that this would be the case because you were getting deacent transfer with your one mount point and a single pass pipe set up.

[goose2]

Pretty clever, Dan....did you do this on both sides or only one? Looks safe and simple. I've got some ideas too...perhaps we could compare notes? Also...got the tach you sent. It cleaned up good and works fine, thanks....and I got the dipstick measurements from Patrick MS. Still need to talk to you about motor stuff though...when's a good time to call? Enjoying the orange car....takes an hour to get the grin off my face every time I drive it. (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif)
Randy

[Root_Werks]

Mike and Randy,

Yep, did this on both sides. I went back through on just the drivers side and added more welds to help the heat transfer. Then I also added a heatshield to the bottom to try to prevent cold air from hitting the heating tube.

Mike has a great idea, smaller tube running more closely along more of the header pipes.

I was really close, really close to the system just being a turn on anytime and get hot air system. Just the freeway part was a bummer.

with one fan on each side, it would blow air through the defrost vents enough to make your hair move (provided you have hair). (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

Simple, clean and still easy to remove the headers. Light too.

[Root_Werks]

QUOTE (goose2 @ Jun 1 2005, 08:10 AM)

Pretty clever, Dan....did you do this on both sides or only one? Looks safe and simple. I've got some ideas too...perhaps we could compare notes? Also...got the tach you sent. It cleaned up good and works fine, thanks....and I got the dipstick measurements from Patrick MS. Still need to talk to you about motor stuff though...when's a good time to call? Enjoying the orange car....takes an hour to get the grin off my face every time I drive it. (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) Randy

Hey Randy, Call in the evening, like after 5PM works pretty well for me. I am usually home by then.

Glad you like the orange car. (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) That 2.4 rocks! (IMG:http://www.914world.com/bbs2/html/emoticons/rocking nana.gif)

You still gonna put those headers on your 914-6 then? I'll take the ones I made from you off your hands. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

[Dr Evil]

QUOTE

provided you have hair

Hey, you takin to me (IMG:http://www.914world.com/bbs2/html/emoticons/mad.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)