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Power loss at 5500 rpms

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yepes281

15+ Year Contributor
971
2
Mar 22, 2009
H-Town, Texas
Just installed my new 2.3l motor and around 5500 rpms it kinda feels like it hit a governor, it will continue to climb but very slowly from 5500-7000 rpms. I hit 17-18 psi at about 3800 rpm, and creeps to about 20-21 at 7000 rpms. Im running the same tune i had before the motor got built as well, just on 1-2 less psi now.

Heres what was done to the motor
4g64 crank, 2.3l
malney pistons and rods, 8.5:1 comp ratio
272 cams
1-2 LESS psi on a 20g
ngk br7es instead of pos autolite platinum plugs

Ive checked for boost leaks and the only ones im getting is a small leak from the throttle body, and a small leak from the hole on the boost controller nipple, it holds boost well when blt with only a small drop off in pressure. Leaks were there previously as well. Also no exhaust leaks either.
 
This is not what you told me fahg, you suggested my timing was off, that my turbo wasnt in its efficiency range, and that i need to log my car, which i fully intend to do as soon as i get a laptop.
 
Also... I feel like you might be maxing out your injectors, but im not that experienced with them. Something to check though.
 
Also... I feel like you might be maxing out your injectors, but im not that experienced with them. Something to check though.

I think the injector are fine, i was running 22 psi previously and now it only creeps to 21, i am going to be running e-85 though so i will be upgrading them soon.
 
I ordered my tactrix cable so it will be tuned soon, just needing some bigger injectors.

And the wastegate is fine, its just creeping.
 
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