How rough is No2 on your motor?

[frostee]

hey there guys/gurls, i was thinking about getting a nitrous kit for my h22a, my bud's gonna sell me a complete kit for $300. I was wondering how much do you think the stock internals can take safely? I was thinking it should handle 90 shots ok, and is there anything i should do to the motor or any extra safety accessories i should get before running it so it doesnt kill the motor? I'm probably just gonna run it once a month if even that....

[Neutrino]

90 shot on stock internals mmmm....bad ideea. I would say anything above 30 shot is starting to have serious potential of destroying the engine. Also for 300$ i bet that system dosn't come with a piggyback computer so uless you completty retune the ecu yourself you'll run way lean.

[frostee]

-what exactly is a piggyback computer, how much do they run, and where do i get it?
-so if i'm gonna be running No2, would it make any difference with the pistons whether they are hi compression or low?
-I've got a buddy who runs 70shots on his b20vtec almost 10 runs every weekend for the last 6 months and his motor still runs smooth with stock internals.....

[Deakins]

NO2 a exhaust gas

[Self]

Your friend is lucky. A 90 shot on your car is pushing it. Gaurantee you will have big problems in little time. I say nothing more than a 75hp shot, but probably want to stay closer to 60 even.

[Neutrino]

Originally posted by frostee
-what exactly is a piggyback computer, how much do they run, and where do i get it?
-so if i'm gonna be running No2, would it make any difference with the pistons whether they are hi compression or low?
-I've got a buddy who runs 70shots on his b20vtec almost 10 runs every weekend for the last 6 months and his motor still runs smooth with stock internals.....

A piggyback computer will basically tell your stock ecu what to do. If you don't have one and have instead the classic cheap nitrous setup your stock ecu will be completetelly overwhelmed by the sudden gas in the manifold and will not be able be make up for it and your car will run way lean. With a piggyback the ecu will be tod what to do and will feed more gas so the fuel/air ratio will be good. The fuel/air ratio is a factor way too many people ignore and can prove very bad for your engine if is not good. Also the piggyback will monitor when is best to induce the nitrous not at random moments.

Venom makes a complete system wih a piggyback that goes around 500-700 $. I understand that NOS and the other companies also make piggybacks but are sold separatelly.

And yes as with any other types of forced induction the higher the compresion ratio the harder the shot will be on your engine.

And a 70 shot is too much IMO even the 60 recomended by self. I personaly would stick with a mximum of 30. Remember rebuilding your engine is very expensive.

Also DO NOT USE platinum plugs since platinum is a catalist for nitrous. I recomend iridium.

[gunnmen01]

Ive run the 55 HP shot on my D16 for a year, and a 75 HP shot the last 6 months...no problem yet...on stock internals. I'm building a motor now but still gonnna run just the 75 HP shot....


gunnmen01

[whtteg]

I have been running a 75hp shot also for about a year now. My kit is a wet kit however. If you want it to be safe on your motor and you plan on using it alot then I suggest you finding a wet kit. The reason you ask? Well you can tune the sytem to what you need. ie: you want to run a 75hp shot, but you are affraid of detination. Well you can run one size larger fuel jet and run a little rich and make about 70hp. Running a little rich is much beter than running lean.

Also like Neutrino said don't use platinum plugs. And try to get some plugs that are a step colder. I am using the zex plugs and are happy with them, but I am thinking about tring the iridium ngk's.

[inferno]

The B-series can usually handle about a 60 shot, and the H-series is good for about 75 stock. A friend of mine had a 75 shot on his B18C1 for over a year before he decided to build a turbo motor. He had no internal modifications, but he did have i/h/e, aem fuel rail, aem fpr, adjustible cam gears, and msd ignition though while he was running the nitrous. I personally wouldn't suggest running a dry shot of nitrous except to spool a turbo on a carefully tuned application and in that case, I would use a small shot...no more than 55hp.

[Neutrino]

Originally posted by inferno
The B-series can usually handle about a 60 shot, and the H-series is good for about 75 stock.

you sure? from what i hear the h22's have pretty weak rods.

[inferno]

The stock H series rods are stronger than a B series rod.

[Self]

Really? I also thought the H rods were not a very strong rod. I thought that was the problem behind all of the h22 turbo problems? I've heard of more than one turbo h22 blowing rods on factory boost settings, and a tad above...

[frostee]

hmm... i guess we'll see what happens when i run 75-80 shots(wet) on my h22a......

[Neutrino]

well good luck man. I still say that a 80 shot is too big but the final decission is yours. Hoppefully you can prove me wrong.

[beastman]

I've heard a lot about up to a 75 shot is about the most you can do before you need internals. But I think about 35 is what you should should start out with and work your way up to 75.