Porsche 911 GT3 Dyno Run With iPE Valvetronic Exhaust System.
We performed many dyno testing and lab work to achieve any meaningful power gains over the stock design.
We tested so many different configurations during our development of this system,
that we are able to compile dyno results to show that iPE exhaust will get you:
a power gain vs stock.

PM or email us info@ipe-f1.com for more details

 

Good result, you should correct your own text to say that you have a power GAIN vs stock, and not a power loss. :-)


I must say that 352rwhp stock for 991 GT3 is well below what I would excpect for a 475HP car, that is quite a drivetrain loss assuming dyno is correct and car is healthy.

 

Mustang dyno's are known to give numbers that are usually lower, sometimes by a lot, than other dyno's like Dynojet. The main thing is to look at the change from before to after. It looks like there is also some gain in midrange torque

 

It all depends how it is calibrated. I watched a 996TT with flash and exhaust pull 327 whp on a Mustang.

 

352 from 469 (SAE) HP is 25% drivetrain loss! Seems incredibly high...

 

In Taiwan, humidity, hot temps, and bad gas almost always yield bad figures. We are interested in the gains only.
But 352hp is rear wheel horse power. The correction factor is 1.349. You need to use 1.349 multiply 352 then we arrive at 475 crank horse power.

 

Where does the correction factor come from (curious). I am agreeing with everything you said, including bad gas. Curious if anybody else has dynode these 991 GT3's stock, and the type of dyno, location etc. I agree that the only thing truly relevant was that there was a gain. The gain sounds low because the your original number is low.

 

also why no video for sound ?????

 

Hi Bro , please check thess video clips