Heat riser block off plate - needed with headers? (1 Viewer)

[rex in bama]

Quick question to the forum- do I need a heat riser block off plate when running headers with a stock intake? I’ll be getting the headers coated or wrapped, also running the carb fan, for what it’s worth

 

[Godwin]

No need for block off plate with headers. Headers will not be in physical contact with the intake as the stock exhaust manifold was.

 

[rex in bama]

No need for block off plate with headers. Headers will not be in physical contact with the intake as the stock exhaust manifold was.

Many thanks! Taking the carb/intake/etc. back to stock and just wanted to make sure

 

[charliemeyer007]

I made own stepped washers to make up the difference between the thickness the header and the manifold. I put in longer "studs" to accommodate the new washers and 2 man-a-fre gaskets that were installed wet. I planed both units flat on a big piece of glass with sand paper. I also used stainless steel nuts.

I cut a "V" notch in the air cleaner housing mounting bracket so I could get a socket on the manifold underneath.

Lastly I made a fluid heat riser to prevent carburetor icing in the fog. It is plumed into the heater hose circuit so it shuts off with the heater valve.

 

[Mark W]

In Alabama it will seldom be a factor, but in any climate where it gets cooler, a blockoff plate/ intake heater system is a "really should do" modification once you remove the OEM exhaust manifold.

Mark...