00chevsilv

iTrader: (4)

I'm about to do a TBSS/NNBS intake swap on my '00 and since I'm obviously running a return style fuel system, I will be running a vette fuel filter/regulator so I can run the rails that came with the intake. As I understand it, the fuel pressure regulator that I have stock is vaccuum refrenced, whereas the vette filter will not be. First of all am I correct about this?

When I look at my injector flow rate tables vs. MAP, they stay constant throughout the table. Whereas in a stock corvette tune, they increase (or decrease can't remember) across the table. Is this change in PSI constant no matter what the flow rates are for the injectors (Ie. 28-30 psi for small injectors or 58-60 psi for bigger ones)? Or is it relative to the flow rate of the injectors (Ie. 28-30 psi vs 56-60 psi)? In other words, how do I adjust the flow rates for my 8.1 injectors. Is this the only table that will change between a vaccuum referenced and a non-vaccuum referenced fuel pressure regulator? I'd rather not band-aide this with other tables (VE and whatnot) if I can get away with it.

Thanks,
Brian

GMCtrk

iTrader: (27)

If you search here, someone created an excel spreadsheet that you can download that will calculate the appropriate IFR's for you based on the MAP. For the 8.1 marine injectors, here are the values (assuming a fuel pressure of 58 PSI)

43.775421
44.085446
44.333465
44.643489
44.891509
45.139528
45.387547
45.697572
45.945591
46.193610
46.441630
46.689649
46.999673
47.247693
47.495712
47.743731
47.991751

That's from 0-11.6 PSI using EFI live. If you have HP tuners it's probably not as helpful