LEATHL_WS6

Question! Will a 340 pump and 30lb SVO injectors be enough for 550rwhp? say 425 on motor and a 125dry shot.

Thanks Rob

SDB

iTrader: (7)

It is for me...I have a 382 stroker and 200 wet shot...I was just tuned very conservatively (fat) on a mustang dyno, got 580 rwhp and 644 rwtq..

Single Walboro 340
Hotwire kit
30 lb SVO injectors
GM MAF kit from NX
stock rails, lines, regulator...

I installed a Kenne Bell boost-a-pump, and found out that it was not needed (actually flooded the **** out of it even at 20%!). I left it on, but it is at zero...

I still have to lean out the fuel jet from 44 to 42, the stock jetting was too rich...should pick up a little power, clost to 600 rwhp on a mustang dyno (A4, converter unlocked, big wheels and tires).

I am happy it does feed it well....lots of $$$ and aggrivation to do a sumped tank, big external pump, big line, remount the FP regualtor, etc.

jamnut

iTrader: (4)

I'm running one & on the spray my car is probably putting down something in the Neighborhood of 550 rwhp.

Bad thing is that you have to do some modifying to get it to work right in an LS1 tank. If I had to do it all over again, I would spend the extra $100 & go with the Racetronix Plug & Play setup. In fact I have a buddy that is a Tech for gm & he told me that the next time he pulls a sending unit assembly out of an F-Body he's gonna give it to me & I'm gonna pull the Walbro & go with the Racetronix setup. The walbro gives me plenty of fuel, but with the racetronix setup you don't have to cut up the bucket that your pump goes in and you can hook up the little priming line, just like the stock pump.

Tim98TA

iTrader: (7)

I run 2 Walbro 255's. One feeds the engine and 1 feeds the dp system. 2 seperate fuel lines for each one.

383LQ4SS

iTrader: (33)

The pump will be fine...if you want more room do a hotwire kit. The injectors will be pretty close though.

Racetronix

iTrader: (2)

The injectors would be on the edge. Perhaps some 32's will provide a bit more headroom?

A 340 pump would be marginal @ 550RWHP w/o an upgrade harness depending on your motor's BSFC. The upgrade harness would provide the extra headroom / safety margin you would require. Running w/o the fill bucket also has its issues. The details of its purpose are covered in our ad here:
http://www.racetronix.com/RX-F99-FPKG-2.html

SStolen

iTrader: (22)

I plan on running a 100 shot of TNT on top of my cammed motor. I'm guessing 380-390 on motor and 500rwhp/550rwtq on the bottle. Will I HAVE to have a new fuel pump? A lot of people are telling me I will be fine....

Racetronix

iTrader: (2)

There is a wide window of variation when it comes to factory fuel pumps. The real question is how much of a gamble are you willing to take vs. the cost of a proper system. A fuel pump system is probably one of the least expensive upgrades you can install in your vehicle yet one of the most important. A good fuel system is an insurance policy for your motor. Motor jobs don't come cheap and N2O can be quite volatile when not enough fuel is at hand.

antz01ta

iTrader: (3)

i am running a single 340 with the stock lines and rails and putting down 590rwhp 615rwtq, running 42lb injectors, and all is well.

LEATHL_WS6

Thanks for all the replies. I wish I wouldn't of bought this walbro already I would put in a racetronx. But I bought this before the racetronix system was even available. Unless you guys want to take it in on trade....

I'll watch the injector duty cycle once I get it setup.

Racetronix

iTrader: (2)

Not much safety margin there.
Not something we would recommend.

antz01ta

iTrader: (3)

the only problem i had was i could not bring the nitrous in until 3400 rpm
anything below that i did not have enough fuel pressure, i am switching to dual 340's over the winter. unless you have another solution for me?

Racetronix

iTrader: (2)

That depends on how much more HP you want to build...

antz01ta

iTrader: (3)

looking for 700 rwhp in the spring with the same dry shot.

SDB

iTrader: (7)

Question...will a dry shot tax the fuel system (in terms of pump and lines) more than a wet kit (assuming both at 60 psi)???

Racetronix

iTrader: (2)

Contact sales@racetronix.com for DP info.

Racetronix

iTrader: (2)

If both are running off the injector rail the dry system will typically be very slightly more efficient / use less fuel. Larger fuel injectors are required in most cases. Most people use a wet system as it is easier to tune and less expensive to implement.

Inspector12

iTrader: (29)

Racetroxix, Emailed you never got a responce on a DP setup! That was two weeks ago. Wreckedraptor@earthlink.net. I am S/C and looking for around 650-700rwhp.

Racetronix

iTrader: (2)

... you ordered a single system last week??? Try the single and if you need more add a MSD booster.

toxic99

You wish!