NightriderCobaltSS

I have a question about the 60lbers from a few websites i have seen the 60's we are buying are 60 lbs/hr at 43.5 PSI but our fuel pump is at 56 PSI. so does that mean they could flow more at a higher psi but are limited by our stock PCM or do they flow less at a higher PSI. im no injector expert but i saw that and it was a question i have.

Here is the link to gm's website that says our stock fuel pump is rated at 56 PSI

http://media.gm.com/us/powertrain/en...2007/07car.htm

celicacobalt

they flow more, my 42 pounders flow like 57 pounders since our fuel system is like close to 60 psi.

NightriderCobaltSS

Well if that means at 56psi they are not flowing at 60lbs they are flowing more then that.

Psykostevo

The real problem comes from our ECM only being able to manage flow rates up to 63.49#/hr

After that the computer loses control of the injectors basically, and the rest of you flow has to be rigged to compensate for the differences.

I think I remember calculating them a while back, and they go into the 80#/hr range, but that was about 10 months ago.

Witt

It varies according to manifold pressure. Returnless systems don't compensate for manifold pressure which is why we have an injector flow rate table. At 20psi boost the flow is nearly identical to a 3bar pressure regulator, but under vacuum they flow even more, outside the range of the IFR table and makes them harder to tune for low pulse widths.

TVS_SS

i want to convert to a return style fuel system..

so much nicer!

Dang cheap oem's..