SRT10 Viper Paxton and Nitrous

[avenged8fold]

Did a search on this and nothing came up. I am curious to see if any of you guys with the paxton kit have experimented with a small shot of nitrous, maybe a 50 or 75 shot. I am curious to see before and after numbers and whether it was on a dry or wet kit. Small shots of nitrous are known to do wonders on any forced induction application and I wonder if a 50 or 75 shot will take an 8 psi paxton SRT10 from 700 rwhp to 800 or 850 rwhp. Would that be pushing the envelope on a stock cast internal engine? Thanks

[Kenneth Krieger]

One must be careful when applying greater cumbustion chamber pressures with cast pistons along with NOS. There is a fine line of going beyond those capabilities. I would NOT do any more than a 75 shot along with the S/C. I have a Paxton, but it's PLENTY without adding the NOS. Putting the power to the ground is the key (obviously), and you wouldn't be able to use the NOS until 3rd gear, and then prograssively at that.

[avenged8fold]

It just sounds to me like a little bit of nitrous would help greatly lower the intake air temperature, specially after a hard run on the stock crappy paxton heat exchanger. I know the upgraded DLM heat exchanger and intercooler pump will keep the car from getting hot but at $1,000 it's not pocket change especially after a $6,500 blower kit. I hear guys are losing over 50 rwhp from run to run, that would be about half a second down the track. I have a used nitrous kit that I can jet for a 50 or 75 shot. I just wanted to see if anyone else has had success doing this.

[plumcrazy]

i called NX and asked them about for my GTS. was told a 35-40 shot was gonna equal about 100rwhp cause of the cooled intake temps.

[avenged8fold]

OK, so maybe a 40 shot will be sufficient, do the injectors that come with the paxton kit be able to support the 8 lbs of boost and compensate for a 40 shot as well? How stressful would a 40 shot of nitrous on top of the 8 lbs of boost from the blower be on a stock cast internal engine on the SRT10's?

[Paul Hawker]

Believe taking the stock engine over the standard Paxton kit will begin breaking parts rapidly.

The existing Paxton kit seems to be the Goldilocks of Viper horsepower.

Lots of examples of people enhancing the standard kit, and running into reliablilty problems.

For a stock tire'd car, the Paxton seem to deliver just about as much as the driveline can endure.

[Kenneth Krieger]

My sentiments, EXACTLY!

[622r109]

Ditto, Change Pistons And Rods

[Viper X]

Wouldn't add nitrous to a Paxton car with the stock internals.

Paxton uses stock injectors.

[v10kingsnake]

You are much safer and more efficient adding a meth injection kit on your paxton to cool the intake charge over the nitrous. Methanol is also WAY cheaper than nitrous is.

[avenged8fold]

How much cooler does the meth injection cool the intake charge? Any examples of intake temperature readings before meth and after meth with the paxton @ 8 lbs?

[v10kingsnake]

Originally Posted by avenged8fold

How much cooler does the meth injection cool the intake charge? Any examples of intake temperature readings before meth and after meth with the paxton @ 8 lbs?

Visit snow performances website for everything you ever wanted to know regarding methanol injection.

[VIPER R]

The addition of water injection with the Paxton isn't really a power adder as much as a helper against detonation. If you add water injection and retune you can add horsepower, but then you're back to pushing the envelope. If the injection fails after the retune, you could be in even worse shape.

[Coloviper]

I have the Boost Cooler on my S351R which has a 12 psi pulley and a 408 stroker now. I say now because the heat and lack of forging on the internals made the engine go "boom".

Actually the previous owner pushed it and had catestrophic piston failure in #3 piston. The car was okay when I bought it. He had just spent almost $15K in forging all the internals but I did not get it dialed in properly until I added the Boost Cooler. The S351R does not have an intercooler for the supercharger which is just a flaw. I can get away with the Boost Cooler to make up some of that heat difference. It really does help.

On the Viper, I have no experience yet, but in our lovely Rocky Mountain air (or lack there of) it is almost a necessity on a charged vehicle at these altitudes. IMHO

[Viper X]

Randy is correct (Viper R).

If you add water / meth injection without a retune, you will loose power. If you retune for the water / meth and run out of water / meth, your engine may go boom.

I'd advise you to stick with Paxton kit and upgrade the intercooler.

Dan