19lb or 24lb Injectors

[Dark_5.0]

Originally Posted by Jeff Chambers

If you've got plans of taking the car further in the future (e.g. better heads), then I'd go straight to 30# injectors and mass air combo and a minimum of 255 lph pump. I'd look for a good tuner in your area to get it all dialed in when you're done.

You would seriously run 30# injectors on a motor with stock heads?

With what about 15 psi of fuel pressure.

[Jeff Chambers]

Originally Posted by Dark_5.0

You would seriously run 30# injectors on a motor with stock heads? With what about 15 psi of fuel pressure.

Changing fuel pressure is passe'. Adjustable regulators are a bandaid fix for an improperly tuned setup. Where do you change fuel pressures on a returnless system? The injectors are calibrated for 39psi drop, so operate them there! If your A/F is off, then deal with it in the MAF transfer function where you should. The computer will eventually learn a correction for fuel pressure that has been changed, that's why you always end up going back and changing it again!

We run 60# injectors in high horsepower blower cars without any adjustable regulator at all, yet they manage to pass smog tests. Why? Because the system is tuned to operate efficiently from idle all the way to redline.

[tmoss]

Originally Posted by Jeff Chambers

The computer will eventually learn a correction for fuel pressure that has been changed, that's why you always end up going back and changing it again!

Of course this is correct Jeff, but I would qualify it by saying it tunes out the fuel ONLY if the engine did not need it - and it does it with the adaptive control feature of the computer program.