jetting

[jnoplay]

im putting a turbo on my rx-1 and want to know were i should start on jetting? I will be running 10 lbs. of boost and live 1000 ft. above sea level. If any one could let me know were to start i would appreciate it. Thanks

 

[givemeaboost]

Just start with your stock jetting , 130-135 should do.

 

[jnoplay]

cool thanks

 

[Turk]

Heads up..i am running the newest double down pipe with slightly bigger turbo & I had to ge to 147.5 main jets. Please/please/ install an a/f ratio guage to moitor what your motor is doing cus it,s the best insurance u get! For $600 in guages it,s worth it to know what is going on! Don,t guess!!!

Been der dun dat.........twice!!!!!

 

[jnoplay]

I got an aem a/f gauge, water temp, and boost gauge

 

[rxrider]

Jetting are closely related to you fuel pressure regulator. Some people have to jet up big time as Turk have shown, other have to jet down a lot. I went from stock to 132.5 and was still in the low 11s on the AFR (piston and plugs agrees with the meter by the looks of them). This season I have jetted down to 127.5 to get it around 12-12.5 AFR, I'm running meth injection so I can get away with these numbers.

 

[madsledder]

I run 127.5 to get mine were it needed to be . But every sled is a little different, start stock and go up or down to were it wants to be. But don't run all day on it if its lean or rich adjust right away to aviod the extra heat in things.

 

[Blue shadow]

intercooler has a lot to do with jetting ,at first I went with 135 jetting with A/F at 11.8 at 15 to 20 psi then I change intercooler with a 3 inch down open pipe and went from 135 to 153 main jetting on 22 psi with a A/F at 11.8 again .Start with stock jetting to be safe and see were your A/F is at .

 

[jnoplay]

So i should jet it so i am at 11.8 then?

 

[rxrider]

Yes that is correct. 11.8-12.0 is good at WOT 10 lbs and up.