Is higher fuel pressure, make for lean or rich?

[copteaser]

I am a little confuse here, how do I rich the engine? Do I lower the fuel pressure or raise the pressure.
Thanks

 

[bruce]

You can raise fuel pressure to richen the car,
UNTIL
you exceed the pumps capacity, and then raising the presure LEANS the motor.
Care is needed in doing this.

 

[copteaser]

perhaps I should be more specific. I just finished rebuilding the engine. So far this is what I have, 40 over with forged pistons, 218-218 cam, power plate, alky system, adj f regulator, TE-45 (a) turbo, 50 lbs injectors, 23 degree race chip. The car is running really good and I am going to the track tomorrow. My plugs are rally clean (whitish), and someone told me that perhaps the car is running lean. I don't want to ruin the engine by running lean, the fuel pressure is between 35-40 lbs. I am think I am better of running rich that lean. ( I know I should invest in a scan master)..
Any advised??????

 

[Randy Greenoe]

Turn the fuel pressure up to at least 42# and I personaly would not race it until I had a scan tool and Knew exactly what was going on! Just my opinion though.

 

[azgn]

you are making a mistake racing the car without a scan tool.....at the very least, make sure you start with stock boost levels...15 lbs or less and the fuel pressure at 43

 

[copteaser]

advised well taken........don't think i will be racing tomorrow. I spent tooooo much money and tooooooo many hours working on that money pit to mess it up now. thanks