Over 6375 it will use the values in VE for 6375 and same on SA. May not make much difference. Probably more important for SA at high MPH and then should be reduced. Not sure if your def file...

Are you using a heated NB?

top down solutions sells a 12-20 lb spring...

I believe if you set it higher PE wont invoke till you hit a higher RPM. Saves on gas. Trucks have it set higher. Most likely to save gas.

Is your fuel pump adequate to provide higher fuel pressure? I run a TPI pump at 20 lbs FP with 75 lb injectors. as stated you need more AE fuel. A WB would be helpfull.

Thank you. Makes sense. I was uncertain if BPC is same for TBI vs port fuel. Meaning the pressure differential at injector with the TBI injector out of the air stream and not seeing VAC.


OOPS. ...

Two 75 lbs injectors at 21 lbs fuel pressure with a BPC of 87 at 100 MAP/0 VAC TBI

I am coverting to port fuel (EBL) from TBI (EBL).

I need to calc the BPC for 24 lbs injectors ar 43.5 lbs fuel pressure. 5.7L.

I read the formula reads displacement of one cyl divided by...

I believe synch is better for larger injectors for idle. I am thinking that if asynch is allowed the ecu moves form synch to asynch in a rythmic pattern causuiing a surge. Pulse width is constanting...

I believe you always want some value in Table 2. I used #5 for 400-3600 rpms adding balance to table #1 from #2. The idea is that there always has to be some VE in the adder table in order to have...

It has been eight years since I ran a 7747/$42. this is Ronny from 3rd gen BTW.:rockon:

When i first modded my engine adding 75 lbs inj's at 13 lbs FP I witnessed surge at idle. I was told(RBob) to disable asynch partly due to my TPI pump having adequate supply of fuel for WOT. I...