Inliners International Forums General Discussion Engines 292 LP pistons.... detonation????

I did build the engine. Milled the block .025 to get a reasonable quench of .055.. CC ing the heads an the pistons the actual compression came out to 8.95 with .040 LP pistons. A mild Schneider cam, .465 valve lift, 194-204 degrees duration at .050 lift.The rest of the engine used the 250 intake and exhaust...
The engine idles nice,makes decent power up to 4000 rpm and doesn't ping on 89 octane gas. I will try 87 octane now that the engine has some miles on it..