fuel pressure for 20 psi

[ODHANZ]

I'm at 54-55 psi fuel pressure and am getting around 12.5 at redline of 6,500

how can I fix pressure loss at redline if that is happening?

is my fuel pressure too low for 20 psi on my 3076? I haven't turned it up yet b/c my SCT is running me way too rich until about 5,500 where it begins to reach what I want to see (11.6 ish)

I'm at static- not rising rate, and have no other piggybacks attached.

I recently installed a new 255 pump, bottleneck fix (need to upgrade to a bigger fuel feed line -using stock line and rail right not) have RC 750s

my car is running again, just not right as always

[SpeedEuphoria]

Well if you have SCT you need to have it tuned better

[ODHANZ]

called pwerks already, waiting on a callback

[rasp]

Not following. Your first line has you running lean, the 3rd says you're running too rich until high rpms...

What exactly is the problem; too rich or too lean?

[ODHANZ]

both too rich (10.0) until about 5,000 where it begins to lean out- gets to 11's at about 5,500

then continues to lean out until redline where it's mid 12s

I assume that the rich in the midrange is a tuning issue for which I called Pwerks, and the leaning out I'm having trouble figuring out

Once I get a resolution from Pwerks, I have increased fuel pressure to 58, and will increase it more if it richens up the lean area towards redline, had this problem before and couldn't seem to fix it, so now I have added the fuel mods listed (pump, bottleneck fix, re-wire) limitation is the stock fuel feed/rail and I have no view of the fuel pressure.

I do have water injection so I can take a small risk here and there, but I will not run the car at 12.5 or more a/f at redline

[rasp]

So it goes from 10 A/F at WOT to 12.5 at WOT in the higher RPMs? Sounds like a pretty crummy tune to me. Hopefully they resolve your problem.

[ODHANZ]

thanks, still waiting for a call back- hopefully today and hopefully I don't have to send the unit back in--- I want this running right now since the weather is so nice, I wanna be able to do a few pulls, but will not do much with so much fuel being dumped

[rasp]

Yeah you can't do pulls with that kind of tune; and if you do, your power will be severely undermined.

I'm sure they'll fix it up for you so it's in the ballpark range. Just be as specific with them as possible. Looking a tune with your wideband is always good, too. Not sure if you're about to, though.

[ODHANZ]

I don't know what the tune is, but I heard back from them and I will send them more details tomorrow about where it begins to lean out. I did raise the fuel pressure so that I don't have a crazy lean spike at the end though.
I am hoping to save for a tune this summer and I don't plan on adding much after this unless I build up the internals.