camaro_9999

Thank for all this answers
first thing the Mechanic man said that the comprission is to high
we use this gasgate for the heads 4.030 thikness .40 comitec gasgate
we use octane 98
i talk with the Mechanic who built my engine he said that he use a ford fuel pump to my car is it make problem?? becouse the fuel pressure when we run it on the dyno arround 16 Psi??
and what the best fuel pump should i have??
also to know i have accel regelator

bufmatmuslepants

iTrader: (3)

You should have 43.5 psi. That sounds like your fuel problem. Get a walbro 255.

If anything your conpression is low. With 98 octane fuel you could get away with probably 13.3:1 with a goods tune. Remember these motors have reverse flow cooling, the top of the combustion chamber stays cooler than traditional small blocks so we cam run much higher compression.

Puck

iTrader: (17)

98 measured how?

We measure differently in the US, so cannot compare straight octane to most other parts of the world.

quik95lt1

iTrader: (7)

exactly...........98 octane r+m/2 is different from 98 motor octane.......you need to go off the motor octane number