which is better a t3 turbo kit or 500 hp nitrous shot. I heard that a turbo will make the same power but the power will always be there compared to nitrous which you have to refill when its out. I was also told that to run nitrous the compression has to be low becuase the nitrous increases cylinder pressure.

 

The type of motors that generally use 500 shots are not something you would be interested in building. These are mostly multiple stage shots on high performance drag cars running low low 9's or faster 1/4 miles. I know a guy running 9.1x's with a 300 shot and he tried a 400 all off the line and it put the car on the rear bumper almost lifting the rear tires off the ground. Its a serious motor in a serious drag car.

Nitrous cars usually like higher compression. The cool nitrous charge helps cool intake air temps so you can get away with the high compression and high cylinder pressures.

T3 turbo is a smaller frame turbo. It will not give you a 500 hp increase by itself. A pair of T3 turbos MAYBE on a good twin setup but even then, T4's are generally preferred on a V8 twin setup.

 

Talk about different worlds here, The average motor will not even take that amount of N2O before parts get sent into orbit...That much N2O into the average plenum would not be cool.... Plate system mixed with a fogger may assist you but most likely will not make a pass at the track.

A turbo that size really needs a mate so twinns would be an efficiant way to go and make some goood power, T3 twin 63s would be able to make 650 depending on cam,tune etc...

 

backwards logic says if bl85c can run a 200 shot on a stock 2.8, then a stock 350 should handle a 400 shot just fine.....

 

well lemme put it this way. i have run several nitrous set ups. 400 on a stock 350. doable. maybe a few times. but not a lot. i have run a few 150 to 250 nitrous shots. i know that 4th gen engines handle it perty darn well. i have seen stock engines do well also. BUT!!!!

it has to be set up properly. fueling has to be right. the system has to be right.
and for someone to tell you you cannot run timing with it well i have proved that wrong on a fuel injected engine. on a heads and cam 5.3 2002 engine i ran 31* timing naturally aspirated. i also ran the same tune on nitrous with a 175 shot. but that was after many nights,many jets, and 11 hours on a dyno to get the fueling just right. and if i say my air fuel gauge go above 12.5 i shut it off. as well as had all the sensors you could think of to do it.

so yes it can be done. hell you can put 500 shot on a stock engine if you want. as long as you want to replace the engine when you are finished.


a turbo is a lot easier on an engine due to its ramp up and down. if i had the money to do either i would go turbo. although i love nitrous.

 

progressive controller on the N2O should help out a bunch

I thought I read an article about putting a 400 shot on a stock 350 and it was spraying out of the carb because it was too much for the engine to ingest. BS Maybe?

 

Thanks everyone for your help. I forgot to mention though that it isn't a stock engine. It is a 383 with a cast crank. The engine is a real budget engine that only puts out around 400hp so, I wanted to eventually add a turbocharger or nitrous. Also, it was a dual t3 turbo kit that I was planning on buying.Thanks again.

 

i tried the progressive controller. the only thing about it i didnt like is the timing was up and down as it was pulling it. this was on fuel injection though. im sure if you make it all progressive it might work. i think you would be suprised with a 150 shot though.

 

if engine longevity is of any concern to you, i wouldnt go with the nitrous, nitrous is very hard on engines, the ones ive pulled apart before all lived a short life and all looked terrible on the inside... turbos on the other hand dont seem to put all that much stress on them

i have a friend of mine that turbod a bone stock 4.3 v6 with tons of miles on it, he was building a different engine to put in and wanted to see if he could blow the 4.3 up, so he ran it at 25 psi... for a year... after 20k miles of not blowing up, he just pulled the engine and tore it down, to his surprise it was really clean inside, hardly any excessive wear, the only thing that he seen was 2 bearings were a bit worn, which may have just been the high miles

 

Nitrous when tuned right should live a long while. Its hard on a motor when hitting huge shots at once because cylinder pressures rise instantly and that really hammers down on the bearings, but progressive control or smaller shots shouldnt hurt a motor when air fuel and timing is spot on for the setup.

I dont think this is BS. There is only so much air you can pass thru a motor. If you dont have the cam/heads/intake to flow it, there is a limit on how much nitrous can pass thru it. I have heard of this happening before where you raise the jet size and dont pick up any more hp because you cant fit anymore nitrous in the cylinders.

 

I have a fully forged motor and I'm concerned about how long my motor will last with just a 250 shot.

You're talking about going from 400hp to 900hp. Sounds like a typical beginner mistake. Why don't you get a small cheap nitrous kit and see how it works out for you. Start small and work your way up.