Greddy kit running 16.5 psi and making 177whp?
#1
Greddy kit running 16.5 psi and making 177whp?
I've looked at a few posts on here stating that the greddy kit running 15 - 16 psi should get to close to 200whp.
I dyno'd my car on friday, it's tuned nicely, decent AFR's and a nice flat afr range, but the car struggled to make any more than 177HP at the rear wheels, I had a different head on the engine previously and the car was around 200WHP, wondering what could be the cause for losing 20bhp?
The car has a fully mapable standalone emerald ECU with 440cc injectors, dual feed fuel rail, decent fuel pump etc.
I'm thinking I should check the cam timing as it maybe a tooth out?
I dyno'd my car on friday, it's tuned nicely, decent AFR's and a nice flat afr range, but the car struggled to make any more than 177HP at the rear wheels, I had a different head on the engine previously and the car was around 200WHP, wondering what could be the cause for losing 20bhp?
The car has a fully mapable standalone emerald ECU with 440cc injectors, dual feed fuel rail, decent fuel pump etc.
I'm thinking I should check the cam timing as it maybe a tooth out?
#11
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Oh well there ya go. Greddy kit only works well with Bipes, Starion IC (with Jim bobowski/15psi.com's intercooler pipe kit), Saab throttle body elbow, and a Bailey BOV from Roadster Performance. B.Bowser heat shield keeps the intake temps down! Racing Mazda's downpipe would be a good idea.
#13
Can't see how a bipes would be better than a decent fully mapable ecu?
The car has a large front mount which reduced air temps drastically, the exhaust maybe is a little small, 2.5" with twin pipes at the rear.
Unfortunately I didn't get a print out of the final run on the rollers, will try and get a print out when I'm next down there.
The car made over 200whp but since then had a replacement cylinder head due to valve guides being worn and the car smoking.
The turbo was a standard greddy unit but has a water cooled subaru core, with the greddy housings.
The car has a large front mount which reduced air temps drastically, the exhaust maybe is a little small, 2.5" with twin pipes at the rear.
Unfortunately I didn't get a print out of the final run on the rollers, will try and get a print out when I'm next down there.
The car made over 200whp but since then had a replacement cylinder head due to valve guides being worn and the car smoking.
The turbo was a standard greddy unit but has a water cooled subaru core, with the greddy housings.
#14
If the only thing that changed is the head then looking at timing (base timing at the cam sensor) and timing belt/cam alignment is the first thing I'd recheck. I put down 262/239 at 17psi tapering to 15 on a Dynojet. The local DynoDynamics reads about 12% lower than the Dynojet I used, but even then it's still 230/210 and way above your numbers.
Next time you are in Colorado drop by
Originally Posted by nitrodann
Ive never been in an greddy with the original greddy turbo that felt anything like 247 hp.
Dann
Dann
#19
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If the only thing that changed is the head then looking at timing (base timing at the cam sensor) and timing belt/cam alignment is the first thing I'd recheck. I put down 262/239 at 17psi tapering to 15 on a Dynojet. The local DynoDynamics reads about 12% lower than the Dynojet I used, but even then it's still 230/210 and way above your numbers.
Next time you are in Colorado drop by
Next time you are in Colorado drop by
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