Thanks Jim. You are right, there's really not much squish at all and it's hard to say how much what is there will do. I certainly don't think it lowered my octane requirements any. I have a 42 to 50 thou quench distance (depending on piston rock) which may be a little too much anyway. But I went with .050 head gaskets because the slugs could go as much as .008" above the deck. Better safe than sorry I figured. Those pistons had a 22cc dish, so probably a rough equivalent to your 30-35 below deck. How much advance has Chris been able to run? I feel we could compare part throttle light acceleration advance (N/A) and get a little idea of how the builds compare. Jim
I'm not sure what Chris runs but my Desktop Dyno recommends 12 initial and 34 total with his cam . Pretty typical. 17 inches of vacuum @1000RPM. He did retard the cam 4 degrees. After his electric power steering install he will have it dyno tuned again without air filter and with open headers. For best octane requirement try to keep Dynamic compression 7 to 7.5 to avoid booster and be able to run the watered down(ethanol) 91 octane.
Is there a particular thickness I should be trying to maintain with this bushing? Just trying to weigh all my options
I like at least .120 thick to be able to press in without distorting or buckling. Remember you want .004 interference. Use a block of hardwood or aluminum each side. Heat the rod to golden brown color and press frozen bushing in with hydraulic press. Drill out bushing to .909 for .912 pin. I think the 1"OD would be better. Rod bore of .996. Would leave .091 thick sleeve after drilling to .909. The 24mm/.945 OD would only leave about a .036 shim.
