whtas up everybody i have a 97 240sx and im gonna get a sr20 motor but i wanna have some fun wit my ka.So i decided to go wit some nitroussssssss.but i have been gettin soo many diff. opinionslik way off opinions.One said the ka can handle 70 shots,100 shots,150 shots w/fuel pressure regulator.Then some one else said even if u have a fuel pressure regulator and msd ignitionu can only push 70 shots no more.It doesnt end someone else said u can push 125 w/msd and fpr (fuelpressure) as long as u dont race 24/7 and alaways pushin wit nitrous.Then someone said that his friend pushed 175 w jus piston changes and better injectors.See how many dam opinions i dont know who to believe what to do I think im gonna jus gonna blow tha motor.Please someone tell that had experiance wit nitrous on there 240sx or any opinions ill try to match the other opinions.lol

 

basically what it comes down to how much the engine can handle with some number of mods. if you leave it stock, i wouldnt push more than 30 (50 at the absolute insane max if youre looking to blow it) with an ECU reset. but if you boost all internals, you might be able to push a 150 shot. but do you really want to spend that much money making the KA that great only to take it out? that makes little to no sense to me. *shrug*

 

It depends on when you plan to inject the NOS.... You can't just start injecting at 1000 RPM you can blow the head,or valves. When I used NOS I ran 100 shot at 2300RPM.
Watch your gauges and stop the nos a few hundred RPM before shifting, it does get tricky. Especially when you watch your RPM gauge jump really fast. I used 91octane, even though 89 is recomended for stock KA's, "after all it isn't stock any more using FI" when you use NOS compression gets really hot.

 

vinnie you talk the KA up pretty well... how much can the motor handle on stock internals?

 

Forged crank, steel cast rods, oil squirters, and steel cast pistons are achievable of up to 400HP. The KA has a stroker crank 1/3 larger in stroke than that of the sr20, used to make massive HP at lower RPM's than an sr 20de/t that slowly and gradually makes power through out the power band.

 

yeah i like that low end power idea... good to know.

 

Well this is a question that cannot be awnsered, honestly.
Every engine is different. Some are machined better than others. Mileage & care also come into play.
I'm sure if yo udo it right & tune properly. You can run a 200 shot. But if you are stupid with it. It couldnt survive a 50 shot.
This goes for ANY engine not just the KA.

 

i was basically looking for a general range that the KA could safely handle without needing to upgrade anyy of the internals. yeah, engine wear and mileage is always an issue, but a conservative to moderate range for the motor IN GENERAL was all i really cared to know. 50 sounds good to me, tho im not NOS expert, so i'll learn that IF and when i experiment for myself.

 

People don't seem to understand Nitrous Oxide very well. Nitrous Oxide is one part Nitrogen, two parts oxygen. That means that the oxygen molecules are allready compressed. The danger of nitrous oxide isn't in the HP that is created, but rather in the compression stroke. The engine is trying to compress already compressed oxygen molecules to blend it with fuel and oxygen that is already in the atmosphere. That is why when you run NOS in shots it is the equivelent to the HP rating at the crank that it makes.
The danger of NOS is that it burns hot in the compression stroke, so you will want to make upgrades in fuel "higher octane", Iridium spark plugs, retarded timing, or even lower compression pistons.
Hopefully that explains NOS injection for you guy's.....

 

hey man if u are going with an sr, save that money son. also u need that car if its ur dailey driver. Get all the parts for ur sr and make it a 6 hour swap.

 

With CA18det retainers and springs you can safely high rev the KA to 8500 RPM...
That will give you the necessary power margine needed to run your NOS longer and much safely on 91 octane with a 10shot of NOS, with no additional mods...
Make shure that you are up to date on your electrical tune up, use Iridium,platinums are O.K......

 

uhm, just to clarify, do you mean a TEN shot or a one hundred shot of NOS?

 

My bad 100

 

hey people please why the sr20 is better than the ka24de i have an se14 from 95 ad thought it was better than the sr20 Thanks a lot from Perù !!!

 

1. search and you will get your answer
2. the SR is MEANT to have a turbo attached to it
3. more performance parts are made for the SR
4. it spins a lot higher, so overall you can pull more horses out of it.

i still like the KA because torque is a beautiful thing