Fast Intentions exhaust and header comparison. Before and after UPRev tune (Dyno)

chuckd05

Yes of coarse I am looking at the whole graph. Wwhat I am saying is on that dyno sheet Tony says the tune picked up no gains... only cleaned up a/f

I find that extremely hard to believe as I have seen with my own eyes 5-6 dyno sheets after an uprev tune where there was power made through out the entire RPM band on a car that came in with full bolt ons and some just TP/Intake ... No, not as much as posted here, but in some circumstances 15hp was gained around the same RPM as this dyno with just a tune on a car with injen cai, berk tp, greddy exhaust...

It seems as if he is saying the tune gave ZERO hp and ZERO tq and I find that very hard to believe.

This is a thread about a COBB tune, which in essense is the same thing as uprev as it just allows you to tweak the a/f and timing.. the gains are really good, and yes I know others have seen no gains from tunes, Im just posting this as a reference, take it for what ever its worth to you..

Cobb Tuned @ Altered Atmosphere – Awesome Gains!

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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

F.I. Inc.

I hope that you are right about the tune. Personally I was more impressed with the outcome from the car we tested in December with no intakes and no tune. A number of factors could be why the tune did nothing. After it was all said and done we added 100 octane race fuel in and tried to bump the timing. The ECU still kicked it back and did an override.

I have no doubt the headers work and you will all love them! I want to get a litlle more in depth in the tune next time because I feel like there is room for improvement. I can tell you this though, I am throughly convinced that the aftermarket long tube CAI's hurt the torque and power throughout the entire curve. Regardless of what anyones says. At this point I have dynoed enough different 370's with the same outcome.

Thanks, Tony

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chuckd05

I believe you 100% , your customers satisfaction is outstanding, and your loyal fan base is really unmatched from anything I have seen on forums.

You seem to do research on a level that many other people/companies do not do, and I am not trying to dis-credit anything you are saying...

Its really going to take a few people who have money to burn to go the extra distance to have a 370z with full bolt-ons. Tune the car. Than Swap stock box back, tune the car again, than dyno again. And share the outcome with others.

And other people also need to follow the first person to do this , and once 2,3,4 people see similar results than people will start to believe it, whatever the conclusion ends up being.

I would not be all that surprised if it was true but its hard to discredit the dynos that show big gains on otherwise STOCK cars, but who knows once you open up the exhaust..

Id love for someone to go dyno happy once they get these LTHs... my one concern is though if you are tuned with a CAI, and you swap your stock box box and dyno , it really wont be right.. You would have to re-tune as tony has shown his A/F does stay pretty darn close to stock with just his exhaust mods. And the CAI def throws it off.. You would need a dyno, swap of intakes, re-tune, dyno.. Or a stock tuned car to do it, but with the ecu learning theory that may be discredited too.

Long live the CAI vs OEM air box debate!

__________________
09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)