Tusc

Just a Tuesday night teaser vid.

The car made 343rwhp on stock LS1 with headers/exhaust and cai.

Any guesses with P-1sc, 3.85" pulley, alky kit with 10# nozzle, fast 92 and LS7 tb?

TimbrSS

Sounds good. Love that whistle.

SmoothFRC

Stock heads and cam? 550/490

Tusc

Have yet to find out. Fuel system lost pressure at 4500 rpm where the car made 420 and 7.9psi (though gauge peak reports 8.4) I'll be swapping fuel filter out and a new pump later tonight once I run off some more of the gas.

But yeah, I'd be happy with 550.

TimbrSS

I have a fuel pump voltage booster in for sale forum.

BLOWNBLUEZ06@RKT Performance

That definitely sounds like some defective fuel system parts. It's quite early for a stock fuel system to give up IMO.

Tusc

I resolved it last weekend, though I can't say which part was the problem. I swapped the one walbro rebadged unit for a different walbro rebadged unit with a deeper rep while also putting in a new fuel filter. After a test run, it has no loss of psi or flow. Oddly, despite the regulator, it went from 55-58lsi to 62-65psi at the rail.

This weekend I'll rewire the alky kit to work. Then it should be good to finish the tune.

romandian

mine went to 65 psi with the "lingenfelter pump" as well. you will be running out of fuel at 15 psi again.

Tusc

I haven't driven the car since last weekend, but will be back down to see it Friday/Saturday. After a few runs up the rpm band though, I saw no faltering. With the Racetronix pump (second one, actually. first one arrived dead) it would drop to 30 or 14psi under WOT at ~4000 or up.

If the fix reverses, I'll post it up here for reference.