Dyno Results with 200 Shot

[HI-NOS-Viper]

So I bought a NX nitrous Kit to add a 200 shot of Nitrous on my 2004 Viper. Other than the nitrous, and a NAV System, the Viper is stock. I used the standard jetting's for fuel for the 200. Well with the 200 jets, the car was running rich, and with the 150, it was running lean, and of course the kit doesn't come with 175 jets.

Well here are the dyno results. It seems that these viper engines torque really loves Nitrous as the 200 shot gave me 265 more RWTQ. The RWHP numbers were a little lower than I expected, but again due to being too rich I'm sure. Well I did end up getting 175 jets and could feel a small difference, but did not have a chance to re dyno it before coming back here to Iraq.

What do you guys think of the dyno, does it look ok? Do you think the stock Intake and exhaust could of been restricting the Horsepower numbers pretty bad as well? How much do you think I would gain with say the K&N intake and Corsa Exhaust with high flow cats? I hope I don't sound like a repeat if others have asked this same question in the same scenario. Thanks for the help guys. I do plan on upgrading the Exhaust when I get back from Iraq, it should sound much better than it does for as much power that it has.

[evomind]

holy cripes...looks pretty damn good to me...
is this safe to run for our engines, assuming the tune is good?

[HI-NOS-Viper]

I have been doing searches in these forums and was told that 200 is safe to run with a good tune, but anything more than that your pushing it. You need to upgrade at least the stock fuel system after 200. I was expecting between 620 and 640RWHP as stock I hit 434. That may be where it is at now though with the new jets, but not sure. That Torque number is huge though. I didn't think it would get that much. Now the car is garaged until I get back

[ILLSMOQ]

Originally Posted by burnhamb

So I bought a NX nitrous Kit to add a 200 shot of Nitrous on my 2004 Viper. Other than the nitrous, and a NAV System, the Viper is stock. I used the standard jetting's for fuel for the 200. Well with the 200 jets, the car was running rich, and with the 150, it was running lean, and of course the kit doesn't come with 175 jets.


What do you guys think of the dyno, does it look ok? Do you think the stock Intake and exhaust could of been restricting the Horsepower numbers pretty bad as well? How much do you think I would gain with say the K&N intake and Corsa Exhaust with high flow cats? I hope I don't sound like a repeat if others have asked this same question in the same scenario. Thanks for the help guys. I do plan on upgrading the Exhaust when I get back from Iraq, it should sound much better than it does for as much power that it has.

The graph looks as it should considering the type of system you are using.

Torque goes from 420 to 720 almost immediately....that's a serious jolt in power, gotta wonder how many of those hits the bottom end will take.

I'd look at adding in some sort of progressive system, it would be easier on the motor and easier to get it to hook up to the road.

As for trying to get more HP out of it, opening up the exhaust (headers, 3" non crossover system) will give you a nice chunk of horsepower, I would guess 40 to 50hp. I would stick with the 200 jets on the fuel and keep it safe especialy if you plan to open up the exhaust.

I wouldn't expect the K&N to add much.

[Bobpantax]

Good advice from ILLSMOQ - particularly about making it a progressive system. I noticed that the dyno chart shows that the NOS kicked in at 73 MPH. If you have not driven a Viper with NOS before, all the rules about cold tires and snake bite are even more important within the context of NOS hitting. Smooth and consistent wins the race. Abrupt acceleration can easily result in a wreck. Diid you get an A/F reading with the dyno? If so, please post that part of the chart. Also, with NOS I think that you should check your plugs more frequently. Have fun filling those tanks. By the way, I have two ten pound tanks and a bottle blanket in like new condition from my early GTS days before it was supercharged by Sean. If you are interested, PM me.

[black mamba1]

The 04's have the piston-breakage problem, especially on higher hp modded engines. I STRONGLY recommend you upgrade your pistons w/ your mods....
When my piston went my car (engine) caught on fire...quick thinking from a good Viper buddy w/ a fire extinguisher saved my car from total ruin.

Change those pistons.....now.

[plumcrazy]

my hp number was 577 but my tq was 856..wonder why the diference ?

id assume you would have a little more HP as it comes stock that way

[Catwood]

did you pull in 3rd gear or do you have a real short rear end ratio?

[Viper X]

This looks like a 3rd gear pull to me. A 4th gear pull would be more comparable to other dyno numbers.

You really need to phase that Nitrous shot in over time in stages and not have it hit all at once or you will have mutiple problems as mentioned above. Loss of traction and then loss of pistons, etc.

I think I might try the 150 shot if I were you and add some exhaust and intake mods. By the numbers you show, you may run out of fuel at the top end with the 200 shot. That would be bad, very bad.

Dan

[viper04]

Originally Posted by black mamba1

The 04's have the piston-breakage problem, especially on higher hp modded engines. I STRONGLY recommend you upgrade your pistons w/ your mods....
When my piston went my car (engine) caught on fire...quick thinking from a good Viper buddy w/ a fire extinguisher saved my car from total ruin.

Change those pistons.....now.

black mamba1
+1, so true. When I window the block it started a fire through the exhaust, but put itself out. Thanks goodness for warranty and Arrow Racing.

[Finally got it !]

Originally Posted by plumcrazy

my hp number was 577 but my tq was 856..wonder why the diference ?

id assume you would have a little more HP as it comes stock that way

Because you have silver. They are built better!!!!!

[HI-NOS-Viper]

Thanks for the advice everyone. Here is the graph of the AF ratio. This was with the 200 fuel jets. I was told that it was running too rich with the 200 jets. I am new to this so does that graph show correct to what he said? Also here is a stock dyno sheet. When I get back I will probably bump it down to 150, I dont want to have to worry about breaking anything on this car. I was considering a progressive system but just didn't have the time. I was only home for a short period of time and didn't want the car to stay in the shop instead of me enjoying it a little bit. WOW plumcrazy that is a crazy tq number, so is that normal for the torque to be that high even though its just a 200 shot? These engines must really love Nitrous. One of the runs I did hit 775tq.

So do you think I should worry about the bottom end with this kind of power? Good advice. Also good advice on the pistons black mamba1, I dont want to have to put out a fire of any type on my car. I especially dont want to have to rebuild my engine, but shouldn't a good tune allow me to run 200 without having to change the pistons? I have done searches here and have heard of people running 200 shots for years with no problems as long as the tune is dead on. The dyno run was in 4th when the nitrous was turned on.

Here is the Nitrous with AF Reading

Here is the Stock Dyno.

[HI-NOS-Viper]

ILLSMOQ what do you mean by " The graph looks as it should considering the type of system you are using."??

[ILLSMOQ]

Originally Posted by burnhamb

ILLSMOQ what do you mean by " The graph looks as it should considering the type of system you are using."??

Your dyno graph looks as it should - single stage 200 shot/huge hit in power

If your A/F is truly dropping below 10 to 1 then yes you are running very rich, You might want to pick up your own wide band o2 device to get a second opinion on the o2 readings...also when you open up the exhaust it will lean out a bit.

[Snakester]

I'd also back off a bit to running a 150 shot. Getting the A/F mix right is key.
You won't have much of a problem if you are running rich, but it's critical not to run too lean.
Outside of the cool looking gigantic power numbers there is the point of what that power is doing to your otherwise stock engine and driveline. At low speeds you will likely spin the rear tires a lot, fry your clutch/tranny, or break your halfshafts/u-joints with that torque if you get any wheel hopping on a quick launch.

One really nice thing with nitrous is that you can ease into the power and rejet as needed.
Just make sure that you dyno test with A/F readings for each set of jets. You can see the value of that freom seeing the lean readings from your 175 shot run.

You might try dynoing with a 100 shot and 150 shot to see how well those jets work with A/F and then drive around a bit with the 100 shot and see how it feels in the car, say on the freeway. It's an impressive kick even with a smaller boost, and you can always bump the power up later.