carguysx2

I have a 1966 c-code coupe I bought non-running that has a supposedly (told) rebuilt 1968 302 with a "mild cam", with a cobra 4-bbl intake and holley 4-bbl and headers. Hate headers, so we took them off. Now we are prepping to take it back to a 2-bbl setup. Have a new Pony Carb 2100 which has an auto choke, of course. Not knowing how mild or wild the cam is, we are putting on hi-po repro exhaust manifolds as a compromise between stock manifolds and headers. Just realized today that the hi-po's have no connection for the heat riser tube. I read elsewhere that I could get an extended tube and clamp it to either the exhaust or the manifold. Problem is with doing that, how do I keep debris from being sucked trhu this open hole into the choke? Any ideas? Thanks in advance!

jojobanks

I knew a guy that had this same problem. He got a copper tube and twisted it around the exhaust manifold to pick up the heat. He squished the open end of the tube mostly shut and never had a problem with debris or anything getting in there.

If you don't want to do that I'm sure any exhaust shop could weld in a bung for it. Just drill a hole and tack a fitting to it.

carguysx2

Thanks, Jojobanks! I have heard the phrase "bung hole", but not in this context - LOL! So what exactly do u mean by "bung"?

The copper tube sounds like it should work; so if done this way, the normal fresh air tube coming from the bottom if a stock manifold is not really necessary, right?

Thanks again!

RagHead

Get a choke stove repair kit from the local auto part store, everything needed is included and no problem with trash.

2+2GT

Drilling a hole in the manifold would be a disaster. The heat riser in the stock manifold is not a hole into the manifold, it's a passage to a stove built into the manifold. Drilling a hole would allow exhaust, with all the soot, etc., into your choke, causing it to fail quickly. Just clamp a 1/4" steel tube to the exhaust pipe, and route it normally to the choke. The small amount of dust in the air doesn't seem to be a problem. You could always run a second tube as did Ford.

carguysx2

Thanks! Not about to drill into the manifold! So... how did Ford run a double heat tube? With a 'Y' connector?

carguysx2

Thanks! Looked up a pic of the kit online - how does that domed/curved plate-like part fit into the scheme of things? Does it clamp to the exhaust?

carguysx2

Thanks, this definitely seems like the way to go! Problem solved!

jojobanks

oops. sry for the misinformation.

I always assumed it was a tube going INTO the manifold. Never had a setup like that.

kalli

ya, if you have headers then you just wrap a tube around the header pipe. that's more than hot enough. nothing stopping you from doing the same thing with a manifold