67Firebird455

iTrader: (27)

I just realized the FMS green-top 42lb injectors I have (currently) are rated 42lbs @ 40psi fuel pressure. If I'm running 58# fuel pressure, what do these actually flow? I need a set of Mototrons, but want to break the new motor in with the 42's and low boost before jumping to 15 or 16# on a tune. Any place to calculate flow at specific fuel pressures?

SSmokin 01

iTrader: (14)

http://www.csgnetwork.com/fiflowcalc.html

bowtieman81

iTrader: (35)

check in the tuning section for the SVO injector thread. You can calculate the flow rates with Marcin's sheet. FWIW, the 42 SVO injectors (which is what I run too) are actually about 48lb at our fuel pressure.

67Firebird455

iTrader: (27)

Wow, that's great... Thank you, both of you! I have also heard the mototron 60's are actually 65? At what pressure are they referring to? At our pressure, what is the true flow?

bowtieman81

iTrader: (35)

Not sure on that one, not familiar with the 60 lbers.

shiftinda93z

iTrader: (2)

When I installed the FMS 42's, we had to actually enter them as flowing 42, not 48.

Old Geezer

iTrader: (3)

Original flow rating X the sq root of the new PSI, divided by the old PSI.....
IE: 42 x SQ rt of 60
---- = 42x 1.1952 = 50.19PPH
43