just wondering how big of a risk it is on ur engine

 

If it still has the hypereucraptic pistons(stock build), there's no way I'd even think of trying it. On a good forged build, it's possible, just a matter of how good it's tuned. Don't get too greedy w/ the crack or the boost though.

 

This would work very well if the motor is built to handle it. Each power adder increases cylinder pressure. One by itself isn't bad but running the two together will damage something on a stock motor at some point. I remember an LT1 customer that was running close to 12.0 with basic mods and a Vortech a few years ago. He started spraying a 50hp shot and that got him into the 11.3-11.4 range for about 3 weeks. Then he called one day to say that a couple of his pistons had checked out.

Tom

 

You have asked a seemingly simple question that does not have a simple answer except to say that "it depends". I think I am one of the few people doing this successfully on an LT1 and would offer the following if you are contemplating N2O + a SC. My setup last year was 14lbs of boost and a 150hp nitrous shot.

1. Use good pistons with ceramic coated crowns.
2. The CR needs to be low; mine is 8.5:1.
3. A conservative tune on a fully instrumented dyno is essential.
4. Use all available safety measures (fuel pressure safety switch, window switch, WOT switch).
5. Run high octane fuel when spraying. I use 100 octane unleaded.
6. Don't think it will last forever.

My motor looked good when torn down except the bearings were pretty shot. Nitrous is known to be tough on bearings. This is after two years and 8,000miles since the last rebuild. One year with the N2O and maybe 30 passes. The nitrous was used only at the strip.

If you are serious about doing this I can respond in more detail.

Rich Krause

 

It's a good topic, but there is little to go by besides general principles. I will be happy to share what I know and what my experiences have been.

What resonates with me when considering the concept of "dual power adders" is that it reflects the "there are no rules" aspect of building a superfast street or street/strip car. Anything goes! I really enjoyed last year, where I could drive to the track, a 100 mile round trip, with the AC on and nice tunes playing, bolt on the slicks (that I carried up with me in the car) and run mid 10's, and then drive home without the car missing a beat or even using a full tank of gas!

Great fun to line up against a rip snortin' big block and put on a good show in a car that I drive back and forth to work nearly every nice summer day. Next year, with another 100hp should be even "funner"

Rich Krause

 

went to that "fastest f-body" site, d@mn rich, that thing must b beastly.

 

I actually went a little faster on the last day of the season. A 4,000+lb street car with full emissions needs that N2O to go fast!

Rich Krause

 

I thought you wanted 200 more hp for next year Rich? Change the build a lil?

I think nitrous and a blower will work, and has. I just don't think it is really needed (imo of course) With all the blowers out there why not just tune the car for the blower and be happy. I do understand that some want a street car to race and if that is the reasoning great, but for a race car no real need for 2 power adders imo.

Low compression is one main key to the equation imo, and a strong bottom end to take the hit.
The other key i think would be to have a fuel system that can take the brunt of the power. Now some will say you can use this gimic or that (and you can) I just feel it is playing with a loaded gun. A big fuel system is alot cheaper than a new rotating assembly. Other possible idea would be to go with a seperate fuel system dedicated to the nitrous so you can run it on c16 or whatever your potion choice is.

If the motor is capable of taking the hit though i don't see any real problems of it. I actually would love to see someone use a direct port kit on a blower, i amagin that it will work wonderful but the cost is getting way up there. I will never do this but that is besides the point.

 

I have a simple question, I have heard people talk about it before.

This is if the engine can handle it.

Does running a shot of nitrous(even a little 50hp) help cool down the "engine"(I put in quotes because I know it doesn't cool the whole engine) which in itself produces more power? So would nitrous help forced induction cars just because of the cooling effect? Especially if the air is warm coming from the supercharger or turbo.

 

I think it's very hard to separate out these effects. I tend to think the answer is mostly "no". In the case of my setup, the nitrous added the expected amount of hp but not more. We didn't spend a lot of time trying to optimize the setup, so maybe there was some more there. But I didn't see any gain beyond what I would have expected from the nitrous.

BTW: the "extra" 100hp is the blower setup, I am going from a 150 to a 250hp nitrous shot! I expect 900-950rwhp, though I may not see all of it since I am probably switching to an automatic. Wish me luck.

Rich Krause

 

Thanks rskrause.

I had read this off a nitrous faq site:

"In addition, both turbo and superchargers compress the incoming air, thus heating it. With the injection of nitrous, a tremendous intercooling effect reduces intake charge temperatures by 75 degrees or more. Boost is usually increased as well; adding to even more power."

I was just wondering if it was true.

I do know a shot of nitrous will spool turbos up alot quicker, eliminating turbo lag.

 

I got a nitrous works direct port setup i will sell ya :P 450 plus shipping

 

You forgot to mention the Dominion heads while you're at it.