General Category > Quadrajet Carb Talk and Tips
cam selection
Cliff Ruggles:
Tight quench improves combustion efficiency. The engine will need less timing and fuel to make best power, plus it will run cooler.
The higher compression makes more power at every RPM as well.
There should be lower cost shim type gaskets available. GM used .020" steel shim gaskets for decades, I've even seem them already coated......Cliff
tayto:
I can only find a steel shim .020" headgasket made by Mr. gasket p/n 1130G. I thought running under .035 put me in the danger zone of piston to head contact?
Cliff Ruggles:
Some engine builders shoot for .025" with steel rods. I shoot for .035" with my engines so I sleep better at night!....
tayto:
You think the Mr. gasket .020" will work ok? I have not been able to find a GM part number, they might not even make them anymore? The Cometic gaskets are pricey but i lile thay they are multilayered abd reusable.
tayto:
The Mr. Gasket 1130G will not work with my heads as they are the "lightweight" heads with extra exhaust bolt... I found some copper shim gaskets that are .021" https://www.summitracing.com/int/parts/sce-511152/applications/year/1987/engine-size/5-7l-350
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