Mods - Ported exhaust mani/Ported FP Green (non hta) UICP/LICP/AEM Intake/Greddy Type-s/Wally 255

Stock injectors running 18psi off the wastegate.

Pulls like a mfkr up till about 4800-5000 then it hits a wall.

Is it the stock injectors that's killing me here?

Thanks.

 

Yes, you need to up the inj. size.

 

Definitely injectors. Ask your tuner what duty cycle % they are at.

 

I have 850's ready to go in as soon as a friend makes his way back up here to give me a base tune.
In the meantime, I wasn't sure if the stock injectors were the issue.

 

I would just jump to 1000's. No point in making smaller jumps in injector size when you might need to upgrade it again. Plus, with 1000cc injectors, they'll be at much lower duty cycle and won't need to work as hard to power that fp green. Check the Dyno tuning forum and see if people are running 850's on a ported fp green successfully and that'll tell you.

 

Thanks this helps me too, my evo is experiencing similar problems at times