Just wondering what the injector constant would be for 42# SVO's at LT1 fuel pressure(Tunercat) (basically, how do I alter the file, for 42#'s??

TIA

 

44.24

 

By doing this Ion, how will it effect my current file? what other changes should I do to it? (just to get a base tune, before my dyno session.)

 

Anybody can answer that question, just as long as the answers correct..

 

I'm assuming this value would be the same for Delphi/Lucas 42#'s?

Thanks

Cody

 

Lucas 42s will be 42.29.

These are theoretical (what they should flow) values that serve as a good starting point. That's what I normally use, but you can go higher/lower depending if your car is running rich/lean and you can't adjust it through other means.

Changing the injector size will require readjusting the WOT air fuel ratio as well, but you can leave it the way it is right now and take it to the dyno, then adjust based on the output you get.

 

Thnks alot ION!...if you dont mind me asking, what formula are you using so I dont have to ask next time?

Thanks

Cody

 

Ford injectors (at least SVO) were rated at 39.2 PSI.
We run 43.5 PSI.

Your new injector size = old injector size * square root of (new fuel pressure / old fuel pressure)

So 42 * sqrt (43.5/39.2) = 44.24

For Lucas injectors, I just pulled the value off Racetronix's website.