Nitrous

Post by **2Fast240sx** » Sat Jan 31, 2004 11:04 am

i have a 91 coupe ka24de with about 70 thousand miles and i want to put a nitrous kit on it. the only thing i know is how to install the kit. i was wondering what else should i do to my engine before i put nitrous on it. thanks for the comments.

Post by **Asleep Altima** » Sat Jan 31, 2004 11:04 am

some kind of engine management should be installed if you want the best of both worlds, n/a and forced... im running the msd digital 6+ so it retards the timing when im spraying and i can run full advance when im not. youll also need some colder plugs, one step colder for a 50 shot and 2 step for a 75 shot. NGK's bkr5-e11's are standard, bkr6's are one step colder and bkr7's are two step colder. other than that, its pretty basic stuff.

Post by **Redline240** » Sat Jan 31, 2004 11:04 am

What breaks first? Say i wanted to run 100 shot or 150 shot...where are the major week spots?

Redline

Post by **Asleep Altima** » Sat Jan 31, 2004 11:04 am

pistons would break first if you didnt take precautions against detonation. 100 is the max on a stock internal'd block.

Post by **Redline240** » Sat Jan 31, 2004 11:04 am

What precautions would you suggest to prevent detonation? I have a safc, and i was gonna replace the head gasket and head bolts...i don't really know much about the KA, i've been set on getting a SR but thats being put off for another year so i figured i'd have a little fun with the KA for this summer...i don't wanna spend much on parts that can't be used on the SR when i swap...i was thinking about making a intake manifold, and maybe a header...can't be too hard...i have an exhaust, cai, safc...i'm gonna get electric fans, port n polish, 100shot direct port nitrous, and like i said maybe a intake manifold and header...with a bit of weight savings i'm just hoping for mid 14's or maybe even lower with sticky tires and light weight wheels...oh and i have a lsd...

Is a low 14 sec timeslip possible with this? I'm doubting it but i'll be happy as long as i get into the 14's...any suggestions?

Redline

Post by **cosmo** » Sat Jan 31, 2004 11:04 am

P&P, CAI, header, I/M, on top of 100 shot, would equal at least 220 whp. And I think that's an understatement. So I'd say 14's are well within reach, possibly 13's. If you're a good driver, then low 14-high 13's more than likely.

Post by **Boostedka** » Sat Jan 31, 2004 11:04 am

On a 240sx KA

to get 200 RWHP.

What you need is -

Upgraded Ignition MSD 6A Headers(hotshot makes them)FPRIntakeTest pipe 2 1/4 - 2 1/2 in. And 2 1/2 exhaust.Lightend pulley(good for 5 hp and 10 lbs of torque)

And most important part = Tuning

Should get you 170RWHP + before anything else. Of this depends on the motor condition.

on my old project, I got 172 RWHPand 175 lbs of torque.

Post by **Boostedka** » Sat Jan 31, 2004 11:04 am

Oh if you swap, only electronics and fuel injectors for the most part will match up to SR.

Post by **Asleep Altima** » Sat Jan 31, 2004 11:04 am

safc alone will not work for nitrous. you have to have something that will retard the timing when the spraying begins and then advances it when the spraying ends. msd 6+ will do just that. im sure there are other products out there that will do the same, namely, crane cams, maybe jacobs and of course, a jwt ecu. with my current setup (see sig), im good for about 220 at the wheels. ive trapped consistent 96 mph passes with outrageously ****ty 60 fts. with a good 60 ft and launch, i should be safely in the mid to lower 14's. on a 100 shot with your rwd and some practice, i see no reason you cant break into the very low 14's maybe high 13's.

Post by **SHIEF** » Sat Jan 31, 2004 11:04 am

Boostedka wrote:On a 240sx KA

to get 200 RWHP.

What you need is -

Upgraded Ignition MSD 6A Headers(hotshot makes them)FPRIntakeTest pipe 2 1/4 - 2 1/2 in. And 2 1/2 exhaust.Lightend pulley(good for 5 hp and 10 lbs of torque)

And most important part = Tuning

Should get you 170RWHP + before anything else. Of this depends on the motor condition.

on my old project, I got 172 RWHPand 175 lbs of torque.

No offense here bro, but that post makes no sense at all. Why would you need (assuming the motor is stock to start) a FPR? And what "tuning" is needed based on your post? You can't tune anything you just mentioned other than timing on your own. Why not go with a digital sci msd box? You can retard for nitrous, and have a programable 2-step launch. It's going to take more than that to get 200rwhp, hell 200hp at the crank for that matter.

Post by **Aries** » Sat Jan 31, 2004 11:04 am

any MDS box will be good, but not necesary.People will swear up and down that you have to do this and that to run nitrous, but really you don't.Simply retard your timing slightly (4-6 degrees) and use NGK TR6 spark plugs. On the KA block, nitrous is a great help with the airflow as the motor normally runs slightly rich.

Is your car stock or modded?Also, are you using nitrous to meet a certain time/horsepower goal?

My KA lasted a long time on a 200 shot, but I also had other upgrades on it. Search in this forum for my previous posts on nitrous, and also read the FAQ in 240 Technical about nitrous.

Post by **2Fast240sx** » Sat Jan 31, 2004 11:04 am

basically my engine is stock. all ive done to it is intake and exhaust. also replaced the spark plug wires if that counts. im not trying to blow up my engine or anything. i just want to see how fast my car would run in the quarter mile. my car looks really fast and i just want to be able to back it up. im looking into getting that zex wet nitrous kit that puts out just the right amount of nitrous. never too rich and never too lean. if there is a better nitrous kit for my car let me know.

Post by **Asleep Altima** » Sat Jan 31, 2004 11:04 am

Aries wrote:any MDS box will be good, but not necesary.People will swear up and down that you have to do this and that to run nitrous, but really you don't.Simply retard your timing slightly (4-6 degrees) and use NGK TR6 spark plugs. On the KA block, nitrous is a great help with the airflow as the motor normally runs slightly rich.

actually, your post will leave people to believe it really is that easy. sure just retarding it will let it run, but how safely and how well? before i had msd, the car ran great on spray, but n/a, the car suffered terribly. cold plugs and retarded timing are a real pain in the butt on the street. the engine lags, no power, bad gas mileage. that kind of stuff sucks for daily driving.

Post by **2Fast240sx** » Sat Jan 31, 2004 11:04 am

ARIES. are you still in houston. id like to see your 240.

Post by **Aries** » Sat Jan 31, 2004 11:04 am

yes, I'm in town.my car is in pieces right now, but shoot me an email and I'm sure we can hook up some time.

[email protected]

Post by **TrunkMonkey** » Sat Jan 31, 2004 11:04 am

justjuiceit and Asleep Altima, i deleted all of your posts. feel free to carry on with your conversation off the forums.

-demetrius

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