Here very shortly I will be forging my motor and intend to continue to run nitrous on it.

I have always heard that higher compression and nitrous work well together, but need to get clarification on this.

My goals were to keep stock or higher compression and to spray on top of that. In addition, I will be adding cams and headers.

My question is, will I be better off lowering my compression, or does forged internals with stock or higher compression (11.0 to 1) sound good?

Any variables and recommendations are greatly appreciated!

 

Nitrous is like any other form of forced induction. It produces pressure inside the cylinder, so high compression and nitrous do not mix well.....UNLESS you have a GOOD TUNER. A friend of mine was running 12.0:1 and 150 shot of nitrous....progressive of course....but octane and timing are a big factor when it comes to nitrous. A good guy to talk to about this would be John Stewart (aka Mr. Nitrous), but he passed away in 02. He invented/designed alot of stuff for Nitrous Express years ago. A good man. Anyhow, find someone that specializes in tuning nitrous vehicles and he/she can give you the best advice when buying internals.....cams and valvetrain is important as well. You don't want any holes/chips in your valves because you chose the wrong material. I can recommend a few guys in the Houston area......very good tuners here.

 

lower compression and nitrous are actually much better then higher compression and nitrous. you can use a much higher nitrous shot with a lower compression engine.

the other limiting factor is the engine. 4 banger, v6, v8 etc.

 

i do know that nitrous and turbo follow the same rule, lower compression means more gas or more boost, to much cylinder pressure can cause BAD problems, i would shoot for no more than 9.5-1 and run max timing at wot around 21-22 on race gas

 

dont know where you came up with this from. my 14.0 to 1 sbc 434 stroker takes a 400 shot out of hole off a wot switch and has for 2 years.

 

Turbo and Nitrous are COMPLETELY different. Please inform yourself befor making posts. I have been told from a number of different skilled motor builders that higher compression is a lot better for nitrous than lower compression. Don't ask me why, im not that smart, but these are people I trust. Nitrous makes power in a totally differt way than Turbo. Please research.

 

This is what I have heard. I have seen many cars at the track with higher compression, or at least more than 11.0 to 1 that are spraying insane amounts of nitrous.

The reason I wanted this setup was obviously to retain good NA performance with the use of nitrous @ the track and whenever needed.

I personally know of two people here in San Antonio, TX spraying 150 shots on the OEM internals with no progressive controllers and they are doing well. With that being said, I thought that if I bumped compression up a few points and ran forged internals, I should still be good for at least 175 to 200 shots. Of course timing would have to be pulled a little, but I think the motor would respond well to it.

 

I think you know what your doing. People are running 125 on bone stock VQ35's. With forged and higer compression I see no reason you cant run 200 - 250 shot with some kind of fuel upgrade, Injectors or FMU. Also I would get a tuneable ECU so you can change your fuel mapping for N/A setup and for when you run the N2O.

 

I don't see anywhere on my post that disagrees with you. Did you have your car tuned????????? Mr. Nitrous was running 14.0:1 in his ZR-1 with big shots of nitrous. No one said it couldn't be done. Just better have it tuned. You can't just drop in high compression pistons and 200 shot jets and hope for the best. Timing with have to be adjusted. Do you even read what people post or are you the type that just looks to flame ppl?

 

Maybe if your running on race gas, but on pump gas forget it

even with say 116 octane I wouldn't feel very comfortable with high compression and a 250 shot of NOS. That would cause extreme cylinder pressure that could result in a hole in the block, blown valvetrain or a major backfire that could blow your manifold right off.

 

teseare your words right? i didnt flame you for one. but now that you want to act asnine about it i am now. you have no earthly idea on what the hell you are talking about. nitrous works best on high compression engines.

as far as the tuning on my camaro? well yea of course i pull plugs after a pass and look at them and figure if i need to richen things up or lean it out.

on the 350z its easier as i can richen it up and lean it out at differant rpm ranges.