When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Single Racetronix 255 supporting 670rwhp on E85???
I bought this car 2 years ago and was told it has a single racetronix 255. With a 408 and nitrous, (200hp shot??) It dynoed 670rwhp thru a 4L80e on E85 fuel and 60lb injectors. Does this sound right? I would think it would need alot more pump. It was tuned by Sam Miller.
when i made the decision for dual pumps form lonnies performance, he said the 255 with the hotwire harness is good up to 600 wheel on 93. would definitely be less for e85.
Thats the old setup, i sold it awhile ago.
Whatever it had for a fuel pump is still in the car.
I wanna know if the fuel pump will support 600-650 from a procharger on 93 and/93 and meth, with a 6 speed.
It did 670 with nitrous that had a dedicated fuel system, on e85 thru a 4l80e.
Im not sure how much the dedicated fuel system helped in that setup?
I've been told a single 255 pump (no hotwire kit) is good for maybe 525-550 rwhp. That's running pump gas of course. No way will it support 600-650 rwhp from a blower
I've been told a single 255 pump (no hotwire kit) is good for maybe 525-550 rwhp. That's running pump gas of course. No way will it support 600-650 rwhp from a blower
If whatever pump is in there supported 670 on e85 thru an 80e...It should have no issue with 600-650 on 93 thru a 6 speed.
If it is in fact a 255, then that dedicated fuel help a **** ton to support a single 255 handleing 670.
I just dont know how much that dedicated fuel setup helps.
It might be a Walbro 340 or 450 in the tank for all I know.
That I can't say for sure. You have a lot of variables between the two setups. On one hand you have E85 drawing like 30% more fuel but running n/a with a dedicated fuel for the nitrous. Then on the other hand the blower drawing more than n/a regardless of fuel type. I'd call someone like Lonnies Performance and see what he says
I just read that the dedicated fuel system has its own Deatschwerks 255L intank pump.
So basically the car was running dual 255 pumps (assuming I have a racetronix 255 intank)
Procharged here with a single raceteonix 255 and hotwire. Pump maxed out at 550rwhp. Maybe with a boost a pump 650 but definitely not just the pump and hotwire.
Procharged here with a single raceteonix 255 and hotwire. Pump maxed out at 550rwhp. Maybe with a boost a pump 650 but definitely not just the pump and hotwire.
Around 600rwhp here with 80# injectors and single 255 and hotwire. Zero issues.
Around 600rwhp here with 80# injectors and single 255 and hotwire. Zero issues.
On pump or E85? It takes like 30% more E fuel to equal pump gas....plus you're 70whp shy of what the OP listed. No way a single 255 is doing 670whp on E85, but if the stand alone had an additional pump in it, that would explain it.
Around 600rwhp here with 80# injectors and single 255 and hotwire. Zero issues.
Have 2 cars, one mine in the sig the other a turbo 346, running roughly 570rwhp both with a 255 pump and hotwire. I do see my FP dip down to ~50psi and hold at WOT but a/f is fine based on the tune accounting for it. Also think I have a weakening original alternator that's costing me a couple psi of fuel pressure.
I would say 600 is about the limits of the 255. 670 on E85 doesn't seem feasible to me. But if you are doing a new build on a stock fuel pump and plan on 550 or more, I'd probably just go straight to a 340.
The dedicated fuel system has its own 255 pump.
Mystery solved.
You have to realize that the dedicated fuel system takes the in tank pump out of the equation completely. If it was making 470whp and you shot a 200 at it, that 200hp worth of nitrous and fuel is using its own dedicated fuel system and doesn't strain the "on motor" pump at all. It could have been even a smaller pump for the stand alone system and been fine.
09-01-2018, 04:43 PM
Single Racetronix 255 supporting 670rwhp on E85??? 
