LASTOFTHEBREED02T/A

iTrader: (15)

On a racetronix single fuel pump and nitrous, what would be the limit to be safe?
Say the car makes 450-460 NA, and want to add nitrous. How much can be sprayed safely through a plate kit and 42lbs injectors and progressive controller.
I've done google and search bar, with no answer to the limits of the racetronix pump and nitrous.


Thanks,

M.BOZZ

iTrader: (14)

I was told to use a stand alone fuel cell. I'm in the same boat, 470rwhp and looking to use a plate system and spraying at least 150 shot. I have a lonnies dual pump setup with harness and hobbs switch but going to watch the responce on this before install, Sorry don't mean to jack your post

LASTOFTHEBREED02T/A

iTrader: (15)

No hijack at all... its knowledge we dont have n need. I was also thinking of doing a stand alone, but everyone is going to tell you that. I want to know, how much I can push this pump. Then consider different options.

Killer5.3

iTrader: (1)

I have a cam only sbe ls1 that made 390 on motor. Racetronix with hotwire kit. Have sprayed .093 jet through a Nitrous Outlet plate pulling off the rail. With hotwire kit 600-650 is supposed to be the safe limit..

ScreaminRedZ

iTrader: (3)

I had the same pump kit and I had fuel pressure issues when the fuel solenoid opened. My car was making 432 rwhp at the time, and I was trying to spray a 100 shot. I believe a Hotwire kit would have helped, but I can't confirm as I took the spray off when I installed the Hotwire kit.

LASTOFTHEBREED02T/A

iTrader: (15)

Wow!... .093, isn't that a 250 shot? With your already 390 that should of put you around 640rwhp and around 690tq.
And you went off the rail, with just the racetronix pump and hot wire kit, right?.

Im wanting to spray 250-300, but I know that is stand alone system range with 450rwhp + NA, but before I get into all that, just want to play with whatever the racetronix can give me, and do no upgrades yet.

LASTOFTHEBREED02T/A

iTrader: (15)

Thats very odd, u definitely had something going on. On my old ls1 set up I made 427/402 NA and sprayed 125 without any issues whatsoever on a wet kit, off the rail, racetronix pump and NO hot wire kit. Fuel pressure was at 62-63 and around 61-60 at wot. I will be doing a hot wire kit, just to play it safe.

LASTOFTHEBREED02T/A

iTrader: (15)

Glad we are getting some input, hope more racetronix/n2o ppl tell us how far they pushed their pumps off the fuel rail.

Killer5.3

iTrader: (1)

Thats actually 300 rwhp , but, Robbie the Robot nitrous jet calculator shows it to be about 390 flywheel. So I guess it is somewhere between 350 + at least flywheel. So I am thinking it's probably 775 + flywheel . I know it makes some big power. Car has been 139 mph on the .078 jet at 3525 raceweight.

LASTOFTHEBREED02T/A

iTrader: (15)

So you pushed your racetronix around 690rwhp on spray?... again, this is all off the fuel rail.

floman

iTrader: (54)

I will be keeping an eye on this thread as well. I am in the same boat and getting ready to spray my combo for the first time on the 150 shot, well except for the dyno run while having the car tuned by Geoff @ EPS back in December.

I am around 450-460 rwhp on motor, and have a Warlboro 255 with the racetronix harness. I am roughly at 610-615 rwhp on the 150 jets. So, I know I am probably getting close to the safe limits of my fuel system.

I am looking to make a couple nitrous passes this coming weekend at our local track. I am hoping for some low 10s@ 130 mph or so, with the 4:11s and 28" tall tire I will be wound tight at the traps. Hoping I can lock my triple disc FTI converter on the 4L85E and gain 200-300 rpms to play with while trying to make a full track blast without hitting the limiter too bad.

I would love to get a high 9.9xx slip when the weather cools off, but may take a 200 shot to get it? I know that if I go to step up to a 200 shot, I will need to step up to a dedicated fuel system.

Killer5.3

iTrader: (1)

My car went trought the traps @7400-7500 on 28 in tire and 4.11 gears with the 4l60e on the .078 jet (200 shot). It ran 9.90's and 10.0 on .073 (175). I only make 380 rwhp on motor and weighs 3525 raceweight , so if you can't with the power you are making something is wrong. I hope your tune is good. What afr did he tune it on motor and how much timing you have pulled for nitrous? What plug and gap?

dnkynrbk

iTrader: (34)

The pump is good to 550. If you pull off the rail and exceed that limit your risking going lean on that side and kaboom. Its not worth a motor.
I would get a dedicated fuel cell especially if you do a 175 or more. Some people can get away with doing more but this is why people blow crap up. Its takes s split sec to go lean.
Run the right plugs colder the better and run good fuel and you will have less headaches

floman

iTrader: (54)

Tune seems to be pretty good. The motor tune is running 28 degs timing, and the AFR runs from 12.2-12.8 throughout the run.

The nitrous tune takes away 6 degs timing, so at 22 degs on a 150 shot. The AFR on that run held pretty flat at 12.0-12.2 and that was on a TR6 plug. I just ordered some BR7EFs and will gap them around .032"-.035" on the actual passes at the track. I'm not really wanting to go through the traps nearly as high as you do, don't really want to spin the motor that high. I know that ideally some 3:73s are more what I need for the spray. I will probably just run it up to 6800 and motor through from that point. Hoping locking the converter will help stretch me out some??

This fuel pump capacity has me wondering now, maybe I need to go ahead and get the standalone to stay safe. The time slip isn't worth a hurt engine, that's for sure

dnkynrbk

iTrader: (34)

agree.............................

Killer5.3

iTrader: (1)

Definitely get the 7 plug in there and I would gap them .030 . You can probably stand to pull some fuel out of it. Next time you run it should try and get some good plug readings. If your wb is accurate 12.2 is rich and plugs will back it up. Mine ran 9.87 on .078 jet turning kit off @6900 and running out the back on motor. We just made a few passes all the way through to see what trap speed would be on a full pass.

87silverbullet

iTrader: (11)

Andy Carter was pulling a 330 shot off the rail but I think he was making less power than most because he was cam only.

stherngent

iTrader: (7)

Not trying to hijack but how much could you safely run on a stand alone system with a ls1 5.7 with h/c/I making 420 on motor.

87silverbullet

iTrader: (11)

As much as your lil heart desires or until something in the driveline lets go.

LASTOFTHEBREED02T/A

iTrader: (15)

On my old set up I had no problems with 125 shot and mods in sig 427/402 NA... stock bottom end will let go above 550rwhp. My ride is an 02 a bit stronger, still never pushed it above that.