blk00ss

iTrader: (66)

Ok I want to know if I can safely run a 200 shot on my car. The only fuel upgrades are a racetronix 255 with a hotwire kit, and 42lb green tops. I'm making 497hp to the wheels right now. Can I just upgrade my fuel rails? Or will I need to do rails, bigger feed line/return line, and possibly dual pumps? Right now I'm hitting the car with just a 100 shot. Which doesn't seem to even be working, that's another story I guess lol.

Or would it be cheaper/safer to buy a dedicated fuel sytem and put in the fuse box or battery area? Also every time I hit the nitrous there is a bad stumble to it. Only last or a split second. It's not air in the line because it does it on back to back pulls. Does anyone know what could be causing this?

toretto

iTrader: (12)

your stumble could be a couple of things.

jettings, or ignition.

what kind of plugs/gap are you running?

Also, imo the reason to do a dedicated fuel system is:
1. Remove the 'fuel spike' from the fuel rail and the nitrous.
2. Able to run a higher octane fuel for WOT Nitrous. This will keep your O2s happy if you run leaded race gas.

Cost wise, assuming you buy everything new, you are looking at about $500 worth of fp,reg, lines, fittings etc, oh and some elementary fab work.

Mike@HSW

iTrader: (6)

You would definitely benefit from a standalone. To run a shot that size you would need to upgrade your fuel pump and i would also recommend doing rails otherwise your going to see a pretty large lean spike. It will be a lot less work to drop a standalone in there, plus you can run a higher octane fuel in it.

blk00ss

iTrader: (66)

I'm running tr6's right now. But will got to 7's when I do spray 200. They are capped at .35 if I remember right. I can't remember what the jetting is right off hand, but whatever NOS calls for one of their 90mm plate kits.

So it looks like I need to do a dedicated system. Just a lot of money right now. Could I possibly get away with a set of rails? I heard somewhere that racetronix pump is good to 700hp? When do they stok fuel lines become a limiting factor?

Mike@HSW

iTrader: (6)

The racetronix kit is more like 650rwhp give or take. Some guys have pushed stock rails too 700 on dry shots, i dont recommend this though and you are probably going to see a pretty large lean spike. Personally i would first sort out your issues on the 100 shot, which may be fuel related as well. whatever your problem is on the 100 shot is only going to be magnified on a 200

Mike@HSW

iTrader: (6)

also, to upgrade your system to what you want to do is going to cost around the same price as a standalone. Not to mention it will be MUCH more work involved with that rather than dropping in a dedicate. I would only consider that or simply dont spray that much.

jmill96Z

iTrader: (3)

The best thing about going with a dedicated is that you KNOW the fuel will be there. You don't have that chance of starving the drivers side injectors while the main pump picks up the additional load of the spray.

02SOMWS6

iTrader: (6)

short and simple- Yes you need a standalone

blk00ss

iTrader: (66)

Alright sounds good guys. Thanks!

Now which is the cheapest stand alone and easiest to install? And what kind of gas should I run it? Would 93 not suffice?

Mike@HSW

iTrader: (6)

I dont know about the cheapest, but if you want one of the best, here it is. You have the choice of mounting it in the battery or fuse panel location. Either is pretty easy to install.

http://www.harrisspeedworks.com/home.php?cat=68

JAX04

iTrader: (17)

i would run something higher octane in it, im building a standalone and plan on running some 110 or some VP 124 since i have access to it. i would say that one of the biggest benefeits to running a stand alone it that you can choose the fuel you put in, aside from the obvious other benefeits. just my opinion. you can run 93 in your tank all day. but in the end it can only be safer to run a higher octane. again, just my opinion, and im no expert.

n2ocamaro

You can also do dual intank pumps if you don't want to pay $6-700 for a dedicated set-up. I did a write up on here for LT1 cars and someone else did one for LS1 cars (I think in the forced induction section). I did mine for less than $200 since I already had one walbro 255 with a hotwire kit. I made my own hot wire kit for the second pump. Just wanted to throw another option out there for people who cannot afford the dedicated systems (which are very nice)

blk00ss

iTrader: (66)

I would do just a second intake, but I'm still going to be pushing it on stock lines/rails.