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#5353 06/22/2002 12:39 PM | Joined: Aug 2001 Posts: 154 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2001 Posts: 154 | DOES ANY ONE HAVE A PREFFERENCE ON MANIFOLD HEAT? EXHAUST OR WATER? I HAVE FENTONS AND OFFY. ANY DRAW BACK WITH EXHAUST HEAT? ZEKER6
The Amish Connection
51 Chevy 1/2 ton 5 window,Vortec hotrod, no horse
| | | | | Joined: Jan 2000 Posts: 206 Member | | Member Joined: Jan 2000 Posts: 206 | My opinion is that water supplies a more constant, efficient source of heat than exhaust gas. I guess you are adding a heat plate to the bottom of the intake? It's been a long time since thermodynamics class, but with heat tubes from the Fentons, you are depending on heat transfer through the material only...sure the tubes get hot, but how much is actually heating the plate? Water, on the other hand, is actually flowing through the plate under pressure, transferring a constant supply of heat to the intake. It's also a little easier to hook up water heat than working with hard tubing. I've seen a lot of Fenton heat setups, and the heat tubes can clutter things up if not done carefully. Some guys even drill new plug fittings in the rear of the headers so that the tubing sort of stays hidden, you really have to look close to tell it's there.
Either method is better than no heat at all though. | | | | | Joined: Jan 2002 Posts: 36 Member | | Member Joined: Jan 2002 Posts: 36 | I prefer water for heat , it's more consistent, and you can control it w/ a small ball valve at the intake to help control how much hot water goes into the intake. It will warm up much faster than exhaust gases, if you hook up one side to the thermestat housing , and the other side to the suction side at water pump. It will heat up almost immediately, and run consistantly. Thats my 2 cents , proven on mine to me.
Don
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | I'm in complete agreement with Don.
As Sixpack states, it seems that using heat tubes from the Fenton exhaust headers allows for heat transfer not flow of hot air.
If you look carefully at the bottom of the Offy intake, you will note that there is a separator between the two sides. This allows for heated water to flow completely throughout the intake (going in one side and out the other).
I installed a Langdon's water-heated adapter last month and the engine now has no hesitation (two Rochester one barrels for/from the 261 engines).
Tim | | |
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