What is a good dynamic compression ratio, using the keith black I come to 11.032 static and 7.584 dynamic. Whats pump gas range main will it run on 92 octane, i can always make the chambers on my heads a little bigger if need be

Block will be zero decked to pistons, running aluminum heads and a comp xr276hr-12, with intake closing at 66 degrees, and it says on the calculator to ad 15 degrees to that so im pluging in 81 degrees, running SRP forged flat tops 2 valve reliefs 5 cc's.

If you need some more info Ill gladly give it.

Link to the calculator United Engine and Machine Co.

 

Use the actual intake valve closing when using that calculator. Not at .050" or the 15 degree deal. I have done a lot of research on the subject as I can only get 91 octane here in California. What is the thickness of the head gasket you plan on using? For the most power with aluminum heads you want to be somewhere between 8.25 and not over 8.5 DCR. This also assumes a quench between .035" and .040". The smaller that number the better. I will be using a 8.47 DCR and .035" quench. This is with flat-top pistons and aluminum heads. The LT1 guys can run more but they have a different cooling system. Some are up to around 9.0 DCR. Same with the LS1 crowd.

 

My research showed the same as what is mentioned above. I ended up with a 383, 10.978 Static CR, 8.43 Dynamic CR, .041 quench. Running AFR 195 heads milled a bit (74cc original, milled to 66cc).

Run 92 Octane, no knock at all, decent idle and vacuum. Making pretty decent power too. (Just need some new valve springs - on the way).

-Schultzy