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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2010 Posts: 368 Shop Shark | | Shop Shark Joined: Aug 2010 Posts: 368 | Members:
Changing over to headers and dual exhaust,and putting a holley 2 barrel on stock manifold. I live in S.F. bay area. Now , I have ordered a cover plate with the tube that attaches to header. I have heard that that won't heat the carb enough to reduce the refrigator effect( cooling and freezing of fuel). I have heared that water is better...I have heared I don't need one...
Please give your experience with this issue.
Thanks | | | | | Joined: Oct 2005 Posts: 1,317 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 1,317 | Negative......using a heat plate with 2 orifices and 2 copper tubes running to the exhaust headers is the quickest and safest way to heat the H/W manifold. I've been using this system for the past 14K miles on my 235 powered 54 truck. Regardless of where you operate your engine the intake needs to be heated.....especially with the ethanol (crap) enhanced fuels.
No special "valving" is needed as the firing order of the 235 provides the differential needed for efficient exhaust heating. The other "option" is to use water heat which is slower, less efficient and if you have a leak you can be sitting beside the road waiting for a rollback. Check out the pics of my heat system in my Webshots albums. I used compression fittings, bent the tubing by hand and haven't touched it since day one.
Langdon's heat plate has the fittings correctly located and is worth the money. He is an advocate of water heat while I prefer the exhaust heat for the reasons I've stated above. It's your call.....
Dave
Dave
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | I used exhaust heat as well, but went with a different method, as I prefer to custom fab parts if I can. My plate was made from a sheet of stainless, approx 1/16" thick, with two 3/8" NPT fittings. Those are fed/exhausted with 3/8" steel brake line with flared fittings (no leaks). If I were to do it over, though, I would have opted for a thcker plate, as the 1/16" plate did warp a bit.
Bill Burmeister
| | | | | Joined: Aug 2010 Posts: 368 Shop Shark | | Shop Shark Joined: Aug 2010 Posts: 368 | Dave: Thanks for the input and Pics. I got my headers and exhaust thru National Chevy. They are Wilson Headers. I got the heat plate...The picture shows only one copper tube. I called and they said thats all I would need. Hmmmmmmm. Why put 2 threaded holes in the headers then ?I think I'm going to ask them to send me an extra pipe so I can hook them both up.
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