Does anyone have a preferred method or pictures for blocking the heat crossovers on 383/440? I understand the downside of closing these ports when it is cold but here in Phoenix I am having issues with hot starts given this generation of fuel. I see the the Fel-Pro gasket 1215 has them already blocked. Is that enough or could thr exhaust heat burn thru this gasket? Any info here would be appreciated.
Heat Crossover Question
- Thread starter JBBQ
- Start date
I had a hot start issue on my 383 put in 440 fuel lines they have a return with out that the pump has pressure after shut off and will drip into carb overflowing it also make sure the gas tank is vented sometimes the vent gets clogged i can;t remember what intake gaskets i used. also with your heat out there the fuel could be boiling out consider a carb spacer
Chryco Psycho
Well-Known Member
The 1215 gasket is designed for this , I use it all the time .
1215 is RB / 440
1214 is B / 383
1215 is RB / 440
1214 is B / 383
Any concern or issue with the exhaust heat burning thru?
Use the gasket and make sure the heat riser is wide open. It can be wired open, the butterfly removed, or the butterfly and shaft removed and the holes tapped and plugged.
Thank you!
Would you happen to have a picture of one wired up? Or suggest the best place to wire it to?
Chryco Psycho
Well-Known Member
Never had one come close to burning through .
I would cut the butterfly out .
I would cut the butterfly out .
Thank you.
Adam
Well-Known Member
I just cut out the butterfly on an 89 Ramcharger manifold; I was going to drill & tap the manifold but found hardened inserts for the butterfly shaft. It might be possible to drive out the inserts but I just put a 5/16 bolt all the way across (still much less restriction than the butterfly). The butterfly was welded to the shaft so I had to use a dremel to cut the welds down, allowing the shaft to slide out. PITA. I probably should have used my cutting torch.
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