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Less Power Then Stock

Olly

By Olly,
in Engines & Forced Induction

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Olly Apprentice

Olly

Posted
Posted

Hey people, anyone with any ideas on this topic would help.. im driving an r33 gtst with a trust fmic and forward facing plenum chamber and a greddy emanage which are the main mods... stock turbo, recently had it on a dyno to find it had 139.9 rwkw... which is kinda a swift kick in the nuts since its running 12psi... the ignition coils are fine.. air/fuel is good.. exhaust is a 3" front pipe to a 2 X 2.5 cat back system. fuel pump is a walbro pump of around about 500hp... when you drive it you put your foot down and it just doesnt really go anywhere like it should, i seriously think i could run quicker... but theres no missfire or anything.. just no power. theres a broken knock sensor snapped off in the block but i've been told the emanage bypasses that (hence why i baught it) and i beleive it has... any idea whatelse to look at as too why im about 40/50 rwkw shy of what i should be?? only thing i can think of is maybe the timing..

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Trav33 Mentor

Trav33

Posted
Posted

I had my car on the dyno the other day, and knew previously it had run 185kw. The dyno showed 140kw, and the dyno operator was saying 'wow, thats a good result'. He was clueless and thought it was an RB20, not RB25.

Anyway, my timing ended up being WAY out, and that was causing power problems. was -4 deg (retarded), and we moved this to -12 deg to run 195kw.

I wonder if timing could be your problem?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

After the comp test, i would look @ the tune and parts that have been fitted

There are other things like the plenum etc that could be the issue... as most of the stock parts easily get you into the mid 200's

Exhaust might be restrictive aswell or the cat has collapsed.

There are lots of options

VB- Veteran

VB-

Posted
Posted (edited)

comp test X3

timing belt/cam timing

check all sensors are working except the ones u dont need like knock etc (could just have an electrical gremlin somehwere)

tuning - where did you get it done? take it t a reputable tuner

what dyno/how was it run?

Edited by VB-
khunjeng Veteran

khunjeng

Posted
Posted
Hey people, anyone with any ideas on this topic would help.. im driving an r33 gtst with a trust fmic and forward facing plenum chamber and a greddy emanage which are the main mods... stock turbo, recently had it on a dyno to find it had 139.9 rwkw... which is kinda a swift kick in the nuts since its running 12psi... the ignition coils are fine.. air/fuel is good.. exhaust is a 3" front pipe to a 2 X 2.5 cat back system. fuel pump is a walbro pump of around about 500hp... when you drive it you put your foot down and it just doesnt really go anywhere like it should, i seriously think i could run quicker... but theres no missfire or anything.. just no power. theres a broken knock sensor snapped off in the block but i've been told the emanage bypasses that (hence why i baught it) and i beleive it has... any idea whatelse to look at as too why im about 40/50 rwkw shy of what i should be?? only thing i can think of is maybe the timing..

when i first got mine I ran it up on stock turbo @ 10psi, FMIC, 3" cat back zorst and Emanage I ran 180rwkw...The plenum probably wont add much with ur power levels..

Should should be the same if not better than that result.

Olly Apprentice

Olly

Posted
  • Author
Posted

Thanks for all the advice fellas. im taking it over to melbourne now in the middle of feb for someone to look at.. no mechanics down here would have half of a clue what to look for... cant think of the name of the place im going too off the top of my head but i have one of the head fellas of autobarn in melbourne helping me so hopefully it can be fixed just by tweaking something on the dyno. if i had a light i'd check the timing myself but i cant really be bothered at the moment... once again, thanks for your input

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