Quote:
Originally Posted by lt4camaro
Just about every carb performance intake has the heat crossover eliminated and the intakes are raised so there is air space between the intake and the valley to keep the plenum of the intake manifold as cool as possible. Heat can be a enemy in the wrong place at the wrong time. Hot cylinder heads, combustion chambers and blocks raise the need for higher octane to reduce detonation or one needs to back off timing which lowers horsepower.
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Yes, you want an air gap (if possible) on your manifold or, a non conductive material (plastic), heat crossover plugged, and drawing ambient air, not under hood air.
Air is a very good insulator. That's how home insulation works as well as double pane windows (air gap).
You want as much heat retained in the chamber as possible to promote HP.
https://www.enginebuildermag.com/201...s-even-better/
We are able to run 11.5-1 on 91 and 93 because of the oil squirters cooling the back side of the pistons down. (losing efficency). Otherwise we'd need 100+
octane.