Nitrous reliability

[Snakester]

Interesting info Dan. I hadn't heard about the window switch, but it makes sense. I was figuring the extra cost would be simply buying the extra jets and nozzles for the two throttle bodies.

Do you need an additional inline fuel pump with a wet N20 setup? The Vette could handle 100hp with the stock fuel pump and injectors, but it sometimes required an extra fuel pump and bigger injectors when going with 150 shot or more.

-Dean.

 

[varanus]

Go to the BTR website and check out the nitrous there. I'm thinking of Sacto dragstrip this Sat. Are you up for it?

 

[Snakester]

Thanks, I'll check out BTR for info, but I was hoping for feedback from Viper owners who have researched N20, and their real-world knowledge.

Sacramento sounds great, but I'm going to be out of town this weekend. Are they still doing test and Tune on Saturdays?

Have fun!
-Dean.

 

[MW]

<FONT COLOR="Navy"> Re the techs statement.. It is more of an issue of the fuel (gasoline with the wet
system) distribution than the N20 </FONT c>

 

[MES]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
I have a Corvette that I'm selling and I have a full NX wet N20 system with window switches, purge valve, fuel pressure sensor, remote bottle opener/warmer, etc.
<HR></BLOCKQUOTE>

You would need a WOT switch, that's it! The NOS kit has a fuel enrichment box but it not effective on Gen II cars without some other enrichment. The NOS dry kit should only be used on Gen I motors. I'm not sure what the NX wet kit uses for fuel enrichment (if any) other than the gasoline into the foggers, so basically you have the hole NX kit less WOT switch and possibly an enrichment/retard box.


<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
But having spoken to the Viper mechanic this weekend I'm concerned that a regular wet nitrous install with fogger jets in the inlet tubes may not work well for engine reliability
<HR></BLOCKQUOTE>

Direct port is the most effective way to distribute nitrous/fuel but also very risky if a solenoid goes bad = fried piston. IMHO with a 100 shot into the intake tubes you should have no problem with a wet kit. Stock fuel pump should also be fine unless you have some engine work like heads/cam. Just FYI a LS1 recently blew it's manifold through the hood (well made big dents) with a wet fogger system such as your talking about, from a engine backfire. That's a $12K hood + engine repairs, to you and me.

Get a window switch calibrated for the V-10 it's actually calibrated for a 2 cylinder motor. The Viper has 5 coil packs (2 plugs per coil) so each coil acts like a 2 cylinder engine. You don't want to hit the stock rev limiter (fuel cut off) and continue spraying nitrous as the plugs are still sparking.

Use #40 NOS jets and the proper fuel jets it will = about 70-80 to the wheels, a nice kick in the pants.

 

[Snakester]

Lots of great info MES. I've visited your website many times before and it does have good pictures and more valuable info.

I've got the WOT switch as well already. I was wondering with two throttle bodies How do you split the fuel and N20 lines? Is there some Y fitting? Also, do you have each fuel/N20 fogger setup with jetting for 50hp to get the right power?

Where do you get the 2 cylinder V10 window switch? Does MSD make it, or is it a Viper specialty/aftermarket item?

Do you need to retard the timing for 100 shot in the Viper?
With the Vette, the knock sensor handled everything up to 100hp with the wet/fogger setup.

-Dean.

 

[LTHL VPR]

Snakester-
If you have some time, stop by the shop. I'll be more than happy to talk to you about the different options, pros/cons, etc.. We have installed all 3 types of systems: dry, wet,and nitrous/propane. Some work much better than others.

I also have an RPM window switch calibrated for the Viper engines if you are interested. We are the ones who worked with MSD to come up with this option.

If you don't make it by, give me a call at 408.562.1000 and I can fill you in on the details.

Hope to hear from you soon.
-Wayne (LTHL VPR)

 

[MES]

I've got the WOT switch as well already.

- Is it a mechanical switch or electronic? If electronic (reads voltage from TB) then I don't think it's compatible with a Viper

I was wondering with two throttle bodies How do you split the fuel and N20 lines? Is there some Y fitting?

- Yep put a T fitting (not Y) at the output of the solenoids and then use two 6" lines up to the intake tubes. You may be able to see this in my sig pic.

Also, do you have each fuel/N20 fogger setup with jetting for 50hp to get the right power?

- I don't know but you can check with NX or NOS and I'm sure they do. Your going to need to get the A/F checked at a dyno, so buy several jet sizes. I suggest two #40's (NOS brand) jets for the nitrous then you will need to find the proper fuel jet size.

Where do you get the 2 cylinder V10 window switch? Does MSD make it, or is it a Viper specialty/aftermarket item?

- You have to buy the switch from someplace like jegs.com then send it yourself to MSD for calibration. They know how to do it, just say it's for a Viper and I think it's $65 for the conversion

Do you need to retard the timing for 100 shot in the Viper?

- No, but be careful of running too lean

With the Vette, the knock sensor handled everything up to 100hp with the wet/fogger setup.

- Viper don't have knock sensors to retard the timing like your Vette did.

 

[Snakester]

The WOT switch is mechanical. It was designed to mount under the gas pedal, but on the Vette we mounted it ahead of the throttle linkage which was easier to install and adjust, and worked great.

Do you think that I should go with NOS jets, even though I already have a NX Shark fogger and jets? It seams that I would want to just get another NX fogger and jets since I'm halfway there.

If I do decide for sure to install the N20 setup I will definitely get it setup properly with dyno testing. I did this with my Vette, and it was very informative.

The part that I was trying to discover now was whether there is some fundamental flaw with adding a fogger Nitrous setup to a Viper.

Again, thanks for the great info. I had done a fair amount of research into nitrous installations before I put it into my Vette, but what I am new at is how the N20 systems work with the Viper.

70-80rwhp would be fine for me, and I'm not willing to jump up to a Propane mix system for the few times that I'll use the N20, but if it's reliable and relatively inexpensive, I'd like to have the extra kick for the track or occasional encounter with a modded car on the street.

-Dean.

 

[MES]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Do you think that I should go with NOS jets, even though I already have a NX Shark fogger and jets? It seams that I would want to just get another NX fogger and jets since I'm halfway there.<HR></BLOCKQUOTE>

You should stick with the same brand, NX for all the components. Keeps it simple. I was just using NOS as an example and because I'm more familiar with them.

One thing on your fogger, does it spray at a 90 deg angle (probably does)? You want to aim it back towards the engine, some spray in a 360 deg round pattern which would not mix as well considering where it must be mounted.

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>70-80rwhp would be fine for me, and I'm not willing to jump up to a Propane mix system for the few times that I'll use the N20<HR></BLOCKQUOTE>

You actually can jet up higher than that with gasoline without a problem, but I don't think I would feel real safe with it on my car.

Good luck

 

[Snakester]

Yeah, the fogger was setup at a 90 degree angle and had to be aimed back towards the throttle body.

I'm not sure that it would be worth installing the N2O for less than 100 crank HP, but I'm looking for a nice sweet-spot, balanced between adding inexpensive power, and retaining normal reliability.

I'm not particularly greedy. I never went over 100hp with the N2O on the Vette (the jets went to 150hp).
And I'll even have more power than my modded/N2O Vette with my Viper almost stock, so if I can't run the nitrous reliably, then I'll just sell the setup (probably taking a 50% loss). But if I can set it up without problems I'll add the N2O for those times when the Viper needs to go to 11.

Dean.

 

[Snakester]

I was recently talking with a skilled Viper mechanic and talked with him about installing N20 in my Viper.

I recently got a 2000 R/T10, and I'm in the process of doing some simple airbox/smooth tube/K&N, high flow cats, Corsa exhaust, installs.

I have a Corvette that I'm selling and I have a full NX wet N20 system with window switches, purge valve, fuel pressure sensor, remote bottle opener/warmer, etc.

But I'm pulling it off of the Vette to sell the car, and I thought that I might install it on the Viper. Appearently the adaptation of my N20 system costs less than $150 to do, and would provide a boost of extra power for little cash outlay.

But having spoken to the Viper mechanic this weekend I'm concerned that a regular wet nitrous install with fogger jets in the inlet tubes may not work well for engine reliability.
the mechanic said that because of the long Viper intake runners there is a time when the N20 is applied and the #1 cylinder is getting nitrous, but the nitrous charge has not yet reached the #10 cylinder, and this imbalance of power is supposed to apply undue stress to the whole engine causing problems down the road.

He said that direct-port N20 injection works fine.

I was only planning on a relatively mild boost, jetting for 100hp, which I've heard the Viper fuel system can acommodate without needing propane injection (more $$).

What do you guys think?

I've spent about $1200 on the full NX nitrous setup, so it would be good to use it, but I don't want to ruin the engine if it's a bad match for the Viper's motor.

-Dean.

 

[TOOOFST]

NOS is exactly like a Snikers bar!
Over 20yrs of proven tech.
It's the perfect compliment to the viper!