nitrous fuel systems.

[ShadowFromHell]

I'm thinking of going a different route then I normally do on my TMs with my beater T2 P-body. Instead of cranking the boost I'm thinking of running stockish boost and make the power with nitrous. I've got a nice NX kit I bought used years ago and never used. I'd like to run 15 psi and as much nitrous as possible :eyebrows:.

Milkcarton has run spray on his P-body, and I've chatted with him about it on Facebook. He said to make it work he had to run a separate fuel system (pump,regulator, all of it) other wise between the nitrous and the "boost jump" nitrous causes it would go lean for a few seconds. Has anyone ran into this? Adding a entire second fuel system isn't something I want to do. I've got a Hahn booster pump and was thinking off adding that or going to that new monster walbro 455.

He is also running a larger turbo and I believe E85. His fuel demands in boost are obviously much higher then mine. So what's everyone's experiences with nitrous on a mostly stock T2 car? I know not a lot of people have sprayed our cars, but I know a few have.

Thanks

[contraption22]

How much do you want to spray, realistically?

[Pat]

I've never had that issue. If your fuel system is healthy, you'll be fine.

[ShadowFromHell]

I'm running a one piece, and will be using a single port. No more then 100. I think a 75 maybe even a 60 would meet my goal of mid to high 12s in a gutted shadow.

[Pat]

I sprayed 75 shot on stock lines with an older walbro 255. Zero issues with fueling. Car ran a best of 10.9.

[ShadowFromHell]

Very good to hear. I'm still running a stock pump. I still think I'm going to go with that new 455 when I upgrade. It's only a few bucks more and is ethanol safe. I was thinking of running the Hahn booster I have, but don't like the idea of two pumps.

[contraption22]

Single 255 will be plenty. You''ll actually have more available volume because your fuel pressure will be lower than if trying to make the same power with boost only.

[ShadowFromHell]

Any idea on what's "safe" when running a one piece?

[contraption22]

I wouldn't run more than 100hp through a single nozzle.

[ShadowFromHell]

That's what I was thinking. Going to have to move my BOV to the lower hose or at least as close as possible to the IC. Right now it's right in the middle between the stock IC and the TB. Any guesses on where a true T2 P-body would trap with just 3" exhaust, 15psi, and a 75 shot? I think I could beat 95% of the street raced FWD's in my area with a mid 12 second car. My buddy cleans up around here in his 02 neon ACR that's had a SRT motor swapped in. It's modded but still stock turbo. He might be making 275hp in a car that weights about 2750 with him in it. All the guys with "real" SRT's can't figure out why his is so much faster lol.

[knownenemy]

I know RGL10(Randy) runs NOS & Alky, and has had great results.
Maybe hit him up with a PM, and see what he can offer advise wise. :thumb:

[contraption22]

Good idea moving the BOV to the lower pipe.
Turbo cars love nitrous. I would bet you will gain close to 100whp with a "75shot"

[ATaylorRacing]

I wouldn't run more than 100hp through a single nozzle.

This depends on the size of the solenoids too. The more common smaller solenoids are good for about a 75 hp shot due to their limited amount of flow. The old GLH turbo that I ran 150 hp shot with on a regular basis used two sets of both solenoids and 4 foggers.

[shadow88]

This depends on the size of the solenoids too. The more common smaller solenoids are good for about a 75 hp shot due to their limited amount of flow. The old GLH turbo that I ran 150 hp shot with on a regular basis used two sets of both solenoids and 4 foggers.

I've never seen a nitrous solenoid for sale capable of lowing less than approximately 175 hp. Those ones have 1/8" NPT inlet and outlet threads. Unless you're using a purge solenoid to try to feed your system?

In any event, PM Zin, he's a great contact for your nitrous questions and supply.

[ShadowFromHell]

Another 100hp would make this car a monster. Right now it's more or less stock with a open swingvalve (downpipe broke lol) running 15psi and I managed to hang with a catfish SS camaro from 45 to 85. I couldn't pull on him, but he wasn't able to pull away either :). Once things get rolling ill start a build thread.

[shadow88]

The nitrous systems on my engine is one of my personal favorite mods to the car. That said, the gains are partially from the cooling affect. I have picked up 77whp from a 80hp jet (and related timing reduction and increased fuel enrichment)

I picked up a 65whp improvement from a 70 hp setting with related tuning requirements. The cooling is gained in even the 20 hp settings, but after that, the gains are from the additional oxygen available. If you're wondering how cold the intake charge becomes, I have driven my car to over 120 mph on a hot humid day, pulled over quickly and popped the hood to find frost on the intake elbow.The injection temperature of liquid nitrous oxide is very cold, I'm not sure how cold, but I read somewhere around -59F. Cooler charge, more oxygen, more power, bigger smiles.

a 255 lph pump with factory lines is all I use.

[ShadowFromHell]

What are you doing for timing? Just pulling a couple degrees with the distributer? I've got a OTC2000 and was planning on using that to monitor knock. That along with a WBO2 should keep me safe. ATaylorRacing has really pushed using a EGT gauge when spraying NA cars... should I add one? I've got one in a box I use to run in my other shadow back in the pre-WBO2 days. But to install it I think I would have to pull the head. This motor only has 3k on it with a MP gasket. Since those are NS1 I hate to yank the head unless I have too.

[shadow88]

Just pulling 2 degrees base timing for every 50 hp of nitrous. For safety's sake, I usually set base timing at 8 and use the 80 hp jet. Personally, I use wbo2 and knock sensor for my tuning as well. I aim for no leaner than 11:1 when using spray and no more than 2.5v knock sensor output.

[ShadowFromHell]

What motor, turbo, and boost? I'm running a 2.2 with a stock garret. Are you tunning through the ECU or old school?

[shadow88]

2.2l .... 46 trim f1-49 turbine in a .48 housing..... 31 psi.... factory smec with an adjustable zener diode set to see about 13 psi

[contraption22]

By the way, be prepared for boost creep with a stockish turbo. You're going to be getting a significant bump in exhaust volume.

[ShadowFromHell]

I'm expecting that. If it's to bad ill build a dual stage that drops the boost when the nitrous system is armed.

[contraption22]

That may or may not help. A better move would be to be prepared to for the boost increase with a 3 bar calibration. Bad things could happen if you hit boost cutout with nitrous activated.

[86Shelby]

.....


http://i0.kym-cdn.com/photos/images/newsfeed/000/550/771/7ac.jpg

[ShadowFromHell]

That is a VERY good point! The car is actually a 89 VNT. I've yet to find boost cut. But I will be clamping the map. The extra fuel can be easily added on the fuel side of the kit.

[contraption22]

That is a VERY good point! The car is actually a 89 VNT. I've yet to find boost cut. But I will be clamping the map. The extra fuel can be easily added on the fuel side of the kit.

Not without making it extra rich below boost cut....

[shadow88]

^^ That's very true. With the reduced lag time using nitrous, you won't have to wait too long to bring the a/f ratios back in check.

[Force Fed Mopar]

Port the wastegate hole.

Also, you could just T off the stock fuel feed line to feed the nitrous system. This is how it was done on Rick Lozier's 3.0 nitrous car. Just make sure it's jetted for your fuel pressure.

I have also seen guys use the old overflow tank or the washer fluid tank as the reservoir for standalone setups. Pump gets triggered with the nitrous.

[shadow88]

Personal experience is boost going up no more than 3 psi when using an 80 hp jet. Anyone seen more than that?

[Turbo Joe]

Also, you could just T off the stock fuel feed line to feed the nitrous system. This is how it was done on Rick Lozier's 3.0 nitrous car. Just make sure it's jetted for your fuel pressure.
yup, thats how I used to do it back when I played with juice.. i used to shoot a 50shot on a stock fuel system without problems. at a 75 shot, and you have a walbro, you should be fine. pull a couple of degrees from base timing though

[mopar-tech]

Bad things could happen if you hit boost cutout with nitrous activated.


Boost cutout? whats that?

;-)