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need advice on nitrous system choices

1.6K views 18 replies 10 participants last post by  66 283  
#1 ·
i've decided to go with a 200 horse nitrous system on my street/strip 14:1 compression smallblock stroker.there are so many different types and brands of systems i need help deciding which is best for my application.naturally i want to get the best system i can for the least amount of dough.whats the best bang for the buck? keep in mind i want a complete system so all i hafta do is install it and fill the included bottle.what are you guys using and are you happy with it? thanks for all help.
 
#2 ·
I like the NX kits. They seem to be the "most" complete and their HP numbers are at the rear wheels. No matter which kit you buy..NOS,Edelbrock or NX you will most likely want to add some stuff(especially with 14-1) I use a MSD 3 stage timing retard..pretty cheap for what it does..a good full throttle activation switch instead of the skimpy POS that comes with the kit..a few relays..a bottle heater and most important a good fuel system
 
#4 ·
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#6 ·
Another vote for NX. You can also call NX directly and talk to Jon, his prices are right on also. He is also THE man to talk to on setting up, troubleshooting, etc. I would consider the Gemini Twin or one of their systems that have a 50 HP setting. I run a Gemini with the 100 shot, the 100 is a BIG 100. As someone said earlier, their systems are rated at the tires not the flywheel. The tune up was dead on out of the box.
 
#8 ·
No dounbt NX makes nice stuff. Before you buy I would give the guys at Nitrous Supply a call. It is a company founded by the original founder of NOS, Mike Thermos. He has hired two of the top PSCA tuners, and these guys are really sharp. One of them, Mike Nelson, helps tune for several Pro Mod teams. I just had them upgrade my Sprotsman Fogger to a Pro Race and add a Double shot plate.

It is really a first class shop and their prices are very good. 714 373 1986
 
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#14 ·
thanks BB485!i've been doing more price comparisons and found a website called racenet performance.their price for the "HITMAN"system is 369.95.i'll hafta check their S&H charges and see if they work out to be a little cheaper on total price than the others.since they are in houston,texas and i'm in "bama"i might come put pretty good.thanks again! :D
 
#15 ·
Ok... I will go against the grain. I am a NOS guy all the way for plates. NX on their plate kits have not sold me at all when flowing the kits. I haven't used them recently but their solinoids used to be just junk and drew a ton of amps. Also look at most pro-mods running nitrous and look at what guys are using who run 350hp plus... most have NOS stuff. IMO when a guy has 100-200 grand in his car... I look at what he is using carefully cause I know they don't buy junk.

On the whole hp to the rear wheels thing... well that is worthless debate. That whole we make it at the rear wheels thing is to try and intice the nieve into buying their kits. Too many young people believe rwhp rules all, when it doesn't. Heck how can they promise rwhp numbers when the drivetrain loss is drastically different between many cars. You can also make many different rwhp numbers by changing jets and/or tuning no matter what kit you choose. I'm not real up on what size jets are used for a 200 shot on a NX plate, but if you want to look at efficiency of the plate design in itself you need to take the same size nitrous jets, put them in the plate, and tune it on identical motors/setups. Also some cams, heads, exhaust setups are much more nitrous friendly then other. For example if you have a cam with 106 LSA and huge overlap, chances are you will be hard up to make much more then a 150 hp gain even if you set the plate jet-wise to do 250.

But anyways this debate could go one for sometime, but don't buy the hype. Go find some serious nitrous guys (cause it sounds like you have one heck of a motor) and see what they recomemend. Also I assume you have the proper ring gaps set and are prepared to handle the cylinder pressure you will see with 14 to 1 and a 200 shot?
 
#18 ·
Good points Capn, crunch. That is why I pointed him towards the guys at Nitrous Supply. A lot of things need to be right for a nitrous motor to make power, and more importantly live while doing it.

I am building my 2nd dedicated nitrous motor, this one is a 13.5 to 1, 572 that will see street use a couple times a week. I am very comfortable running up to 350 hp or so, beyond that I have relied on Mike Nelson at Nitrous Supply and he has been a lot of help.

When it comes to comparring hp #'s between systems Capn Cruch is correct; it is geared to guys who really don't know the nitrous game very well. Hp #'s come from jets sizes, fuel and nitrous pressures, timing, etc. A very important thing to keep in mind when running a plate system is the distribution of the nitrous and fuel into the individual runners. Plate and intake manifold design is the key factor here. I have liked the NOS Big Shot and Double Cross as a plate but prefer a Fogger for general use.

As for the valve question; nitrous motors LOVE big flowing heads. They are set up like blower cars where you are not as worried about the port velocity and more concearned with the volume of the air fuel mixture reaching the combustion chamber.
 
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#19 ·
Captain Crunch,

I agree - hp numbers are meaningless - most people talk jet size rather than hp.

About NX being junk, I've had good luck with both NOS and NX solenoids - didn't experience the high amp draws you speak of.

One advantage to the NX kits is that they come with a high pressure tuneup - 8 to 10psi, which is easier to set than trying for 3-5psi with NOS.

I have three friends with gemini quad plates and I had one myself - they worked flawlessly with the supplied tuneups.

I think all the parts are basically the same from all the manufacturers, just different jetmaps and support for their products.

About the solenoids - NX has a new huge solenoids that draws very low amps - damn near the size of a beer can - interesting but expensive.

I now am a believer in sending your kit into a shop to have it flowed and mapped - I used Jeff Prock at Applied Nitrous Technology www.appliednitrous.com and am very pleased with the result. He has a database of safe tuneups and real world results so he can get you close first time out. And his labour is cheaper than a set of pistons...

With his initial tuneup on my engine I picked up more than 400 at the tires on 93 octane and a fat tuneup - very consistent cylinder to cylinder.

66 283
 
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