How much Vacuum?

[richs347]

Most Ford injectors are rated at 39 psi. With the vacuum source off and plugged, set the fuel pressure to 40psi. The 36's may not be enough at the high end so be carefull on getting the right tune. At an 80% duty cycle, 36's are only good to about 385hp. If fuel demand is high, and you want to tune with the injectors, I wouldn't go much higher than 50 psi. You will effectively make the 36's act as a larger injector and you'll be able to reduce the pulse width of the injector. You really don't want your injectors working routinely in the 90%+ range.

I also find that with aftermarket intakes you will have an issue with oil in the intake with the PCV system. ...Even with the correct baffles, screens and being properly hooked up. I have more info on the the injector and PCV issues on my webpage.

The balancer is on the crank with little keys - it can't be installed off a little. However, the pointer bracket could be off. You could ensure that the engine is truely at TDC and adjust the timing marker to align with the balancer. If the marker is off it will effect your timing reading...