34 Just Dynoed But Problem

[nsm034]

just got the 34 dynoed but the bloke reckons its not running right and needs a tune. but what does that mean ? like mechanical tune or computer tune . it looks to be fuel related because it looses power but you be the judge. any help would be apreciated

[Bluprint]

What modifictions does your car have?

[nsm034]

3 inch turbo back, fmic, pod filter, bov , boost contoller 12 ish psi

[Abo Bob]

Auto or manual?

That looks like the classic 'Rich and Retard' because of too much boost. Try dropping the boost to 11 psi and see if you get an improvement.

[nsm034]

manual , yeah i'll try that thanks. that's the one i pm you about abo bob prob wont get on the dyno again for another 12 months though. just hoping it's nothing serious. saving for a power fc, would that stop that from occuring ?

[rb26s13]

i'd be saying rich and retard.. buy a powerfc and go back and see those blokes for tuning

little cameron (the little fella with black hair) that works there, he is an awesome fc tuner

also.. i'd be staying away from people who dont work for a workshop and claim to know how to tune powerfc.. regardless if they have the stuff or not.. it doesnt mean they know wat they are doin.

SVS have by far the best bloke for powerfc's cairns

Edited September 3, 2006 by rb26s13

[666DAN]

Yep you have the classic 'S' in the power curve at the top end, the load scale on the R34's drops timing by around 10 degrees as you go over a critical airflow point ~12psi on a stock GTT will see this happen. Funnily enough you have got almost the same power my car had with exactly the same problem

As Adam said, try dropping the boost a tad on the dyno, you should see a nice curve form when you get the boost right.

The only way to go from here is to get an aftermarket computer so you can eliminate the factory retard at higher boost, on a positive note it stops you trying to squeeze too much out of the stock turbo

[nsm034]

thanks guys good to know i'm not the only one who has experienced this problem. contoller was tuned properly but spiked to like 14 psi after i put the split bump pipe on.