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Rizz67 · 02-12-2001, 06:19 PM

I have a 67 Fastback with a 302 in it. Around town, everything sounds nice, but on the highway some sounds start to occur. Hitting speeds such as 70,80,90...nice rattling sound is heard from the engine, ride becomes rough. The engine itself is bored .30 over. Has a Lunati cam, .512 lift, 230 duration. Comp. Ratio is 10.5 to 1, Roller rockers, open chamber heads,Keith Black Pistons, Holley 650.I put mids in for my gas, rear is a 2.73 and i have a c4. I had read somehwhere that it could be detonation, caused by improper timing? Any suggestions?

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67 Mustang
302 bored 30 over
Roller Rockers
Lunati Cam
TCI Street Fighter

02-12-2001, 06:19 PM	#1
Rizz67 Registered Member Join Date: Dec 2000 Location: Atlanta, GA USA Posts: 6	Detonation??? I have a 67 Fastback with a 302 in it. Around town, everything sounds nice, but on the highway some sounds start to occur. Hitting speeds such as 70,80,90...nice rattling sound is heard from the engine, ride becomes rough. The engine itself is bored .30 over. Has a Lunati cam, .512 lift, 230 duration. Comp. Ratio is 10.5 to 1, Roller rockers, open chamber heads,Keith Black Pistons, Holley 650.I put mids in for my gas, rear is a 2.73 and i have a c4. I had read somehwhere that it could be detonation, caused by improper timing? Any suggestions? ------------------ 67 Mustang 302 bored 30 over Roller Rockers Lunati Cam TCI Street Fighter