I'm fine tunning my 502 procharged 22 classic, I have a new issue it's building crankcase pressure once in a while it spews out the valve cover vent tube. Timing is set at 27-28, fuel pressure is at 30lbs at idle. Any idea's will be appreciated.
I'm fine tunning my 502 procharged 22 classic, I have a new issue it's building crankcase pressure once in a while it spews out the valve cover vent tube. Timing is set at 27-28, fuel pressure is at 30lbs at idle. Any idea's will be appreciated.
Once and a while is ok. Lot's is bad.
Base fuel pressure sounds low but I will have to check my notes. I seem to remember 38 as a base but don't quote me on that.
I went to a puke tank to deal with that. My ventilation was driven largely but massive oil pressure and a loose tolerance to deal with the cold water temps I run. A stock engine should not vent that much.
I drop a couple oz of fluid a year so it is not too bad,
2001 35 Fountain Lightning w500 EFI's
1973 X-18 - Merc 383 Magnum
1974 Chris Craft Roamer with 1271 TI's
38 lbs of fuel pressure,then 1 extra lb for every lb of boost..you now need to do a cylinder leak down test,the 30 lbs of fuel pressure could have leined out the motor and scuffed a piston or pealed a ring land..also when you did a compression test what were the numbers(with the throttle body open and the huffer hose off?)
fuel pressure should be 43# wioth the vacuum line OFF, it will be 38# with it on... then do your delta-P additions...
Where are you checking the pressure? I got different numbers on the rail vs the regulator.
2001 35 Fountain Lightning w500 EFI's
1973 X-18 - Merc 383 Magnum
1974 Chris Craft Roamer with 1271 TI's
Won't the amount of fuel pressure depend on the size of the injectors and the ECM program???
Basically but the ECM would need to be tuned accordingly. As Fixx sort of said, they all go hand in hand. You can't just put in bigger injectors and then arbitrarily drop the fuel pressure.
I guess it would be possible to correlate pressure and pulse width from stock to bigger injectors but you would be risking a bunch of melted pistons if you got it wrong.
2001 35 Fountain Lightning w500 EFI's
1973 X-18 - Merc 383 Magnum
1974 Chris Craft Roamer with 1271 TI's
2001 35 Fountain Lightning w500 EFI's
1973 X-18 - Merc 383 Magnum
1974 Chris Craft Roamer with 1271 TI's
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