Hey guys, I got your basic fuel/nitrous question. Here's the facts

1. 04 ZO6
2. LS6, 6 speed
3. good size cam/and full bolt-ons
4. about 430 to the rear wheels=all motor
5. stock fuel system

So heres the question, I want to run a 150ish wet shot. But I think my fuel system is close to maxed. I was thinking a walboro 255, but I don't think it could support 625ish RWHP. And I don't want to cut it that close. But I also don't want to spend a fortune on a nitrous fuel system. What is appealing about nitrous is it initial cost per HP. If I'm going to spend thousands on custom fuel systems and a kit then I would consider other avenue's.
Thanks......
Maybe It wasn't clear, I'm looking for advise on a fuel fix for a 430ish N/A with 150ish wet shot. Total 575-625ish RWHP. Has to be streetable.

 

When I say streetable I mean road trips. Like an 8 hour trip or something like that. So no boost-a-pumps, I've heard they really push the pump to the max and they burn out relatively quick. And I'm not interested in big custom fuel systems with returns and all that. And no custom or cutting on the factory fuel tank.
But if I can't make it work from the car tank then I may do a stand alone with a 1 gallon cell up front. And thats a whole nother bag of worms.

 

Thanks, It looks like my choices are dual 255 in tank or stand alone fuel system. I hear the dual in tank kit can be wired up differently. One way being duals pushing together all the time (in series) or have the secondary pump come on line when the nitrous system is brought on line. What about these choices, does anybody have an opinion on these ?? thanks for the info...

 

I was planning on upgrading my fuel system as well.

This is what I found searching the internet:

- the walbro 255 can be fit to the corvette bowl or sump (whatever you call the big white container attached to the pump), but the bowl has to modified. There are two vendors I've seen that sell a modified pump/pickup package: Racetronix and Lingenfelter. The pumps can be had for under a hundred bucks but the pickup has to be modifed. Both aftermarket kits run about $300.

- one nitrous suppliers opinion of the fuel system was it needed beefing up to supply a 150 shot with two main points. First the pump should be beefed up and second, installing a regulator and return line at the fuel rail like the 97 corvettes had. This a allowed the fuel system to catch up quicker due to a fuel spike drop when the NOS hit. (I got this from LS1 tech and one of the vendors, but I couldn't find the link)

- Hotwire kit. Supposedly the wiring is inadequate for the current draw and simply beefing up the wiring helps the fuel pump work better. The kits sold give you a wiring harness with heavier guage wire attached to a relay. This is easy enough to fabricate yourself if you want to save some coin.

 

You are spot on about the 255 being deadly (to your motor) close to supporting 625 RWHP. I've seen so many boosted applications use meth to help with fuel issues although it really should be used for more of a safety net vs. a fuel supply. I am boosted and finally bit the bullet and bought an A&A fuel system, I am glad I did, now there is no question that I have plenty of fuel. Even for me what should have been an easy choice was pretty darn hard. When budgeting for a build it is tough to set aside around a grand just for fuel. But.... It is one of the smarter things to do. A good fuel supply is necessary to keeping your motor together, not just something that would help.

Good luck!

 

Are there any drop in pumps that are bigger than 255 ??

 

use the stock one, youll be fine. well maybe...