nitrous build or rebuild?

Okay I have a 94 gsr and I want to put around a 75 shot on it. I was wondering if anyone has any info on if it's better to go ahead and build the motor before spraying or go ahead and tear it up and then build it once you've already screwed up. The reason I want to know is because eventually I want to put like a 100 shot or maybe a little higher. So basically i am wondering what are the chances of warping the block or doing other major mechanical damage, and what all do i need to replace. Also what is the best kit for my car. I was looking into a zex but they dont seem to flexible as for as spraying over a 75 shot. Any info would be apprecaited. I just found this sight not to long ago; I used to post on purehonda all the time(if any one remebers that sight) .

No matter what N2O will do damage to your engine, and a 75 shot on your stock internals is going to play hell. I would suggest that you replace your sleeves, pistons, and connecting rods at the least.

Alright thanks man my friends are all sayin i can put half the horsepwer of my car, but of course it's not there car. :)

You have to be out of your mind. I blew my first motor, a b16a on a 55 shot. Took less than two months to accomplish that. DEFINATLEY build it up first considering thats a good motor and not worth blowing. And about that half of you engine's hp thing, that would be a 90 shot for you. You wouldnt last a week on stock internals.

You have to be out of your mind. I blew my first motor, a b16a on a 55 shot. Took less than two months to accomplish that. DEFINATLEY build it up first considering thats a good motor and not worth blowing. And about that half of you engine's hp thing, that would be a 90 shot for you. You wouldnt last a week on stock internals.

Well I know it's not the safest thing in the world, and I'm probably not going to do it. I do know one guy that has had a 75 shot on a 94 gsr for over a year with no problems, and I also know this idiot thats had a 100 on a stock eclipse for a few months. So to blow a motor with a 55 shot in a couple of months you must have already had some type of mechanical damage or it was not properly installed. I'm not sayin I don't believe you; I'm just sayin I'm not out of my mind.

You right because the motor was running lean, which is what caused that. If you are very careful and monitor the motor carefulley, i know that it can be done. No matter what, it will cause excessive wear on the motor just like a turbo or sc would. If i had the luxury to start of with a b18c powerplant when i first started out, i would have definatley built it up first. I know a guy that blows motors in his crx all the time, but its not too bad when he just keeps replacing them with sohc motors. They care cheap to come by, however I'm sure you are aware that having to buy a new gsr would put a big dent in the wallet.

Yeah it would put a real big dent in my pocket, especially since I am going to college now and tuition is already killing me. Thats why I am probably just gonna wait til i graduate and build it first. Then I can afford it when i screw up. Sorry about yours man, Did you have to replace the whole motor?

Well the motor was a first gen b16a sir which means it was prob a 91 motor. The estimate to rebuild was about 12000, so opted to just part out the rest of the motor and i bought a b18c. I did the install myself that time since it was really easy due to the previous swap. I'm in college myself so i know what you mean. Its tough to juggle school, work, and cars at the same time.

Ive been running 75 horse of nitrious on my stock motor for quite awhile now with no problems, as long as you monitor your engine and check that you dont start running lean or anything else it shouldnt be a problem...


gunnmen01

You may not want to do that. I know a guy who ran a 65 shot and took a chunk out of his piston the size of a grape.

the number one key to longevity of a forced induction motor is tuning. if you dont have it properly tuned as well as guages or some type of ecu scanner to monitor the vitals of the motor while driving, the motor won't last nearly as long as if you did. if you have the motor properly tuned with the N2O then you shouldn't have too much of a problem.....barring any type of previous mechanical issues. now if you have motor problems to start with then it isn't a good idea to go forced induction without a comprehensive rebuild....now, i am not saying that this is a fool proof method, and that tuning is the only key to longevity. but if you plan on spraying more than a 100 shot on this motor, i would definately upgrade the pistons and have the rods shotpeened. honda cranks are pretty good no need to touch them. and i've heard of SOHC rods holding around 225-250 bhp. as for sleeves....i wouldn't mess with sleeving it unless you are gonna be spraying darn near everyday. if its a once or twice a weekend wouldn't worry about it too much. but if you tear it down and they are scored or scratched...i'd replace them. as for the stages of nitrous 50, 75, 100 etc. all that is is the nozzle size. you just change a nozzle to go from a 75 shot to 100 shot.....i guess i'll cut this off now....just my .02

maxspeedhonda, I think the reason you blew your d16 is because the d16 is more likeley to detonate because of the quenche area, and the rods on a d16 are like Chinese chopsticks, they'll break after 10 minutes of load if you have more than 132 hp on a d16, don't belive me, I'lls how you pictures of my dads rods :D

50 shot on a gsr is okay, my bro has 50 shot on his gsr, he squeses daily, the only thing he did was melt a spark plug, lesson learned.. don't use bosxh spark plugs, use ngk, they last! I think the reason he hasnt damaged anything on his motor is because he is VERY careful art tuning, he installed an air'fuel ratio gauge and pay's close attention to it, and he installed a v-tec controler which allowes you to add more fuel if needed. 50 shot is okay, but be very careful if youre gonna do 75, ohh, I fogot to mention, my brothers engine lasts with 50 shot right?... he has badly damaged piston rings.

Read the January 2001 issue of superstreet, they have a feature on nitrous, what you need, tuning tips, and alot more, if you don't have the magazine or you can't find it, I'll see if I can scan it with my friends scanner, ask me if you need any help

Originally posted by integra818
50 shot on a gsr is okay, my bro has 50 shot on his gsr, he squeses daily, the only thing he did was melt a spark plug, lesson learned..

Sprays daily!? Is it a race car or is he just rich:confused: :D
Anywho...I say, if you have the cash for the rebuild anyways, just run the stock motor with however big of a shot you want until it goes. You may be surprised by how much it really can take, and if nothing else at least then you can post here and give everyone some DEFINATE numbers on what the stock internals can handle:) I'm sure everyone would love that. After it goes though, be ready to drop a decent amount of cash into the car and get it ready for what you're going to be running. Rather you decide to run a 75 or a 150 shot, I say go all out and prepare for anything, that way you can't have any "accidents":)

Originally posted by Self


..., and if nothing else at least then you can post here and give everyone some DEFINATE numbers on what the stock internals can handle:)


I'll tell you as soon as I hear BOOM from his engine. ;)