Penfighter
Long Time Dodge Boy
I am putting together a '96 SMPI 5.2 and I am wondering how much compression can be run on regular or premium gas. On 340s we could run 10.3:1 with premium without detonation-even with a lot of advance timing. Surely some of you Dodge Boys have tried to stretch the compression on these Magnum engines.
The stock compression was 9:1 using regular gas. However, I am using 62cc EQ heads which should raise compression to 9:4-9:6. So how much extra compression can the ECU compensate for?
Will the port injection make the air/fuel/cylinder temps noticeably cooler to aid reducing the detonation?
I will be using a cam with about 210* duration and .515 lift (no razzing about the small cam please. This is a work truck). Which LSA will help best to minimize detonation to keep the hyper pistons going in it from cracking up?
Air will flow well with a hi-performance intake and long tube headers so the engine will finally be able to breath. Should I go with one or two stages cooler spark plugs on these engines?
The stock compression was 9:1 using regular gas. However, I am using 62cc EQ heads which should raise compression to 9:4-9:6. So how much extra compression can the ECU compensate for?
Will the port injection make the air/fuel/cylinder temps noticeably cooler to aid reducing the detonation?
I will be using a cam with about 210* duration and .515 lift (no razzing about the small cam please. This is a work truck). Which LSA will help best to minimize detonation to keep the hyper pistons going in it from cracking up?
Air will flow well with a hi-performance intake and long tube headers so the engine will finally be able to breath. Should I go with one or two stages cooler spark plugs on these engines?