Nos Shot
Thread Starter
Cruising
Joined: Jul 2009
Posts: 13
Likes: 0
Nos Shot
1999 corvette with mods listed below: How high of a NOS Shot can I add with this system?
Built LS1 with LS2 Heads, Rods, and Pistons.
- BBK SSI Intake Manifold
- 85mm Throttle body
- HOOKER Long-Tube Headers
- BORLA Exhaust w/ X pipe
- 3:73 rear-end Gears
- Stage 3 Front Mount Intercooler
- ProCharger Supercharger (14psi)
- 65 lbs Fuel Injectors
- Kenne Bell Spark Intensity Control
- Crane 1.8 Ratio Rocker Arm Kit
Built LS1 with LS2 Heads, Rods, and Pistons.
- BBK SSI Intake Manifold
- 85mm Throttle body
- HOOKER Long-Tube Headers
- BORLA Exhaust w/ X pipe
- 3:73 rear-end Gears
- Stage 3 Front Mount Intercooler
- ProCharger Supercharger (14psi)
- 65 lbs Fuel Injectors
- Kenne Bell Spark Intensity Control
- Crane 1.8 Ratio Rocker Arm Kit
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
14 psi of boost is a lot for a street car-you have to watch that you don't run lean with all that boost, NOS will make the problem worse. You'd proably have to add a NOS controller that adds even more fuel when the NOS kicks in but with that much boost already-you'll probably need head gaskets on a regular basis. Maybe your money would be better spent on a larger gear in the rear or heads/cam?
Pro
Joined: Dec 2003
Posts: 654
Likes: 1
From: chandler az
If it was me and I bought somebody elses car, I would look at the tune before I started adding more power. How much timing are you pulling out at full boost. What is the static compression ratio of the engine? How is your AFR at full boost. What kind of rings are you running? NOS has a nice cooling affect on the input air temp and works fine with boost, but if you are at the edge of detonation it can destroy your engine.
Burning Brakes
Joined: May 2008
Posts: 1,147
Likes: 1
From: Mohegan Lake New York
S/C and n20 is for show cars not go cars you got a supercharger work with that you add ntirous annd it becomes hard to control, with a supercharger under boost a split sec of detonation with n20 on ,big probs.look around see any other cars that go fast CONSISTANTLY and RELIABLY w/n2o and S/C ? there may be some guy that can make it work but why take a chance s/c cars and n2o cars are generally equal in power but both togather doesn't add much but the chance for disaster increases . other poster was right on the money look at the tune you got right now and work with what you got sounds like you got a pretty bitchen' car right now ....... GOOD LUCK!....PS no offense to the show car guys but show cars are usually examples of excess and usually not practical but always look good
Drifting
Joined: Nov 2003
Posts: 1,539
Likes: 3
From: South al
If it was me and I bought somebody elses car, I would look at the tune before I started adding more power. How much timing are you pulling out at full boost. What is the static compression ratio of the engine? How is your AFR at full boost. What kind of rings are you running? NOS has a nice cooling affect on the input air temp and works fine with boost, but if you are at the edge of detonation it can destroy your engine.
, i would leave it alone,if ur just wanting torque , bump the boost up, if ur motor is forged & u have a low comp motor thats built like its suppose to, ur tq spike added by the extra boost should be ok,i would definatley change the pulley out on the dyno , dont do it unless u are @ the dyno ,or u will be picking motor parts up off the ground from to much timing or not enough fuel or whatever the case may be ,this is my opinion on the gas with 14lbs of boost , i personally would maybe go up in gear ratio if its slow out of the hole ,or get a cam that responds real well on the low end
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Thread Starter
Cruising
Joined: Jul 2009
Posts: 13
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I believe the crank, rods, and pistons are all LS2. The compression is 10:1 and it's a Crane cam and rocker setup. Oh ya it has a walbro fuel pump.
Ok I read everyone's reply's which I appreciate the input. I'm new to modding a car at all so I'll take the advice and take it to get turned. As for 14 psi being to much for a street car, I agree and the previous owner aggreed too, he knocked it down to 7 psi for daily driving. Now adding NOS, why wouldn't you add NOS to a supercharged engine? If I do add NOS what is the highest shot I can add safely? I do not want to blow my engine! I added some more information on my car so I hope this will help.
Ok I read everyone's reply's which I appreciate the input. I'm new to modding a car at all so I'll take the advice and take it to get turned. As for 14 psi being to much for a street car, I agree and the previous owner aggreed too, he knocked it down to 7 psi for daily driving. Now adding NOS, why wouldn't you add NOS to a supercharged engine? If I do add NOS what is the highest shot I can add safely? I do not want to blow my engine! I added some more information on my car so I hope this will help.
Last edited by mnallen; Jul 5, 2009 at 01:19 PM. Reason: .
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
that car is already making some jam by the sounds of it. 
if your dead set on adding spray and you have a VERY GOOD tuner. a hundred shot is as far as I would go and thats pushing it. However, I have to agree with the rest of the folks on here. Theres probably no need for you to spray. Its a street car right? Just curious, have you got on it yet? i.e. put foot to floor board???? The reason I ask is because with the mods you have listed most people wouldnt even fathom the idea of adding Nitrous to a setup like that unless your crazy. 
I'd venture to say, the car should be making well over 600 WHP (probably more if its tuned right
if your dead set on adding spray and you have a VERY GOOD tuner. a hundred shot is as far as I would go and thats pushing it. However, I have to agree with the rest of the folks on here. Theres probably no need for you to spray. Its a street car right? Just curious, have you got on it yet? i.e. put foot to floor board???? The reason I ask is because with the mods you have listed most people wouldnt even fathom the idea of adding Nitrous to a setup like that unless your crazy. I'd venture to say, the car should be making well over 600 WHP (probably more if its tuned right
Thread Starter
Cruising
Joined: Jul 2009
Posts: 13
Likes: 0
that car is already making some jam by the sounds of it. if your dead set on adding spray and you have a VERY GOOD tuner. a hundred shot is as far as I would go and thats pushing it. However, I have to agree with the rest of the folks on here. Theres probably no need for you to spray. Its a street car right? Just curious, have you got on it yet? i.e. put foot to floor board???? The reason I ask is because with the mods you have listed most people wouldnt even fathom the idea of adding Nitrous to a setup like that unless your crazy. I'd venture to say, the car should be making well over 600 WHP (probably more if its tuned right
if your dead set on adding spray and you have a VERY GOOD tuner. a hundred shot is as far as I would go and thats pushing it. However, I have to agree with the rest of the folks on here. Theres probably no need for you to spray. Its a street car right? Just curious, have you got on it yet? i.e. put foot to floor board???? The reason I ask is because with the mods you have listed most people wouldnt even fathom the idea of adding Nitrous to a setup like that unless your crazy. I'd venture to say, the car should be making well over 600 WHP (probably more if its tuned right You are correct on the WHP, it's putting out 660 WHP right now. I was just checking my options with NOS. If I put a 100 shot on my car will I be able to control it?
I'm wanting to get more WHP and NOS was a quick add, so can anyone suggest somethings I can do to my car that will add more WHP.
Drifting
Joined: Nov 2003
Posts: 1,539
Likes: 3
From: South al
ur not gonna lose et time by switching to an auto trans,more than likely ur gonna gain et
Thread Starter
Cruising
Joined: Jul 2009
Posts: 13
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I always thought Manual Trans was faster than an Auto Trans?? If I added a 50 Shot of Nos to my current car how much performance will I see? If I ran a 10.5 1/4 mile without Nos, how quick would I run a 1/4 mile with 50 shot of Nos? I'm just trying to figure out if it's worth adding NOS, since I can only use a 50 Shot.
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
I always thought Manual Trans was faster than an Auto Trans?? If I added a 50 Shot of Nos to my current car how much performance will I see? If I ran a 10.5 1/4 mile without Nos, how quick would I run a 1/4 mile with 50 shot of Nos? I'm just trying to figure out if it's worth adding NOS, since I can only use a 50 Shot.
Last edited by MVP'S ZO6; Jul 5, 2009 at 03:02 PM.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
It's all the same concept, turbo, supercharger, Nitrous-it's all FORCED INDUCTION OF OXYGEN-you need to add appropriate fuel and timing when the extra 02 is introduced.
Adding boost to what you have is like adding NO2-your adding more Oxygen than the engine could pull in on it's own. The problem with BIG HP #'s is you start breaking things ALOT. Since it sounds like you just got the car, maybe you ought to see if you can actually handle what you already have.
Adding boost to what you have is like adding NO2-your adding more Oxygen than the engine could pull in on it's own. The problem with BIG HP #'s is you start breaking things ALOT. Since it sounds like you just got the car, maybe you ought to see if you can actually handle what you already have.
Thread Starter
Cruising
Joined: Jul 2009
Posts: 13
Likes: 0
It's all the same concept, turbo, supercharger, Nitrous-it's all FORCED INDUCTION OF OXYGEN-you need to add appropriate fuel and timing when the extra 02 is introduced.
Adding boost to what you have is like adding NO2-your adding more Oxygen than the engine could pull in on it's own. The problem with BIG HP #'s is you start breaking things ALOT. Since it sounds like you just got the car, maybe you ought to see if you can actually handle what you already have.
Adding boost to what you have is like adding NO2-your adding more Oxygen than the engine could pull in on it's own. The problem with BIG HP #'s is you start breaking things ALOT. Since it sounds like you just got the car, maybe you ought to see if you can actually handle what you already have.
You are correct, I should make sure I can handle what I have already. I was just planning ahead, so any advice on what engine mod's I can do to increase my HP? I'd like to hit 800 or 900 WHP? Anyone guide me to how I can manage to hit those marks?
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Hey boss, you said you have a built motor. What kind of compnents are you running in the bottom end? (i.e. Pistons & rings, rods, crank, bearings) how about your heads are they built? by the sounds of it you have a motor that can hanle the power but as it has already been stated the rest of the drive train becomes the week link.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Is it going to stay a STREET CAR? Once you get past the 700 or so HP range things get tricky. Driveability suffers and you start breaking driveline components on a regular basis not to mention popping head gaskets on high boost cars. Bet you break something soon with the power you already have.