The Ford Barn

jerry shook · 03-10-2016, 07:39 AM

I guess some will say this is the wrong site to ask this. but i would bet s everal here have upgraded there A . i installed a Weber two barrel with a cast iron exhaust and the header gets so hot it will boil the gas and the hood handle is very hot. my question is has any one else had this problem and how did you fix it ?. It vapor locks also.

BRENT in 10-uh-C · 03-10-2016, 07:55 AM

Go to a motorcycle store and purchase a wrap kit for pipes. You wet it prior to install, and then wrap it overlapping each round. This will help with immediate heat transfer.

The second side is it sounds like the fuel mixture is lean. Lean mixtures and/or retarded ignition timing will cause the engine manifolds to overheat. Remember that the Weber 32/36 carburetor was O.E. on engines like the Pinto & Vega where the cubic inch range was under 150. Even the V6 Pinto engine only had around 170 cubic inches. A stock bore Model-A has cubic inches of just over 200. Bottom line is the carburetor is likely too small for the application, ....especially with one that has siamesed ports that feed back-to-back cylinders.

jerry shook · 03-10-2016, 08:18 AM

Sponsored Links (Register now to hide all advertisements)

Thank"s Brent. What should the timing be on it, i also have electronic ignition. How should the Weber be set it is now 1 an 1/2 turns out. it idles and runs fine. We were it Tampa for the Cigar City Flat head Cruse and i did wrap the header that helped a lot. Just concerned about the heat.

03-10-2016, 07:39 AM	#1
jerry shook Senior Member Join Date: Nov 2010 Posts: 516	Exhaust manifold heat I guess some will say this is the wrong site to ask this. but i would bet s everal here have upgraded there A . i installed a Weber two barrel with a cast iron exhaust and the header gets so hot it will boil the gas and the hood handle is very hot. my question is has any one else had this problem and how did you fix it ?. It vapor locks also.

03-10-2016, 07:55 AM	#2
BRENT in 10-uh-C Senior Member Join Date: May 2010 Location: Eastern Tennessee Posts: 11,513	Re: Exhaust manifold heat Go to a motorcycle store and purchase a wrap kit for pipes. You wet it prior to install, and then wrap it overlapping each round. This will help with immediate heat transfer. The second side is it sounds like the fuel mixture is lean. Lean mixtures and/or retarded ignition timing will cause the engine manifolds to overheat. Remember that the Weber 32/36 carburetor was O.E. on engines like the Pinto & Vega where the cubic inch range was under 150. Even the V6 Pinto engine only had around 170 cubic inches. A stock bore Model-A has cubic inches of just over 200. Bottom line is the carburetor is likely too small for the application, ....especially with one that has siamesed ports that feed back-to-back cylinders. __________________ . BRENT in 10-uh-C . www.model-a-ford.com ...(...Finally Updated!! ) .

03-10-2016, 08:18 AM	#3
jerry shook Senior Member Join Date: Nov 2010 Posts: 516	Re: Exhaust manifold heat Sponsored Links (Register now to hide all advertisements) Thank"s Brent. What should the timing be on it, i also have electronic ignition. How should the Weber be set it is now 1 an 1/2 turns out. it idles and runs fine. We were it Tampa for the Cigar City Flat head Cruse and i did wrap the header that helped a lot. Just concerned about the heat.