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      04-03-2013, 03:15 PM   #19
Brigadier General

Drives: 2013 e92 M3
Join Date: Dec 2006
Location: Monarch Beach

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Garage List
2013 WRX STi  [4.00]
2011 997.2 Turbo S  [4.71]
2013 e92 M3  [4.55]
2013 BMW X5  [0.00]
Originally Posted by Kaane View Post
Reason you have such low boost is due to the free flowing exhaust. The less restriction you have in the exhaust the less boost the car will register. If you installed a factory exhaust with cats you would pick up some boost.

People forget the pressure is not the metric the engine cares about, it's all about air flow.

Also you probably picked up a decent amount of power, you just can't compare the runs from few months ago because the air conditions have changed.

You should of dynoed before and after on same day to verify gains.
Hey what's up.

In my case, the change in exhaust did nothing to change the boost as I have dyno'd with the stock exhaust with the blower. Same boost as compared when I dyno'd the day after I had the MRF catless mid-pipe and Akra slip installed. The boost didn't change much but I did pick up quite a bit of power overall, particularly low in the rev range where the S65 needed it most.

Temp/humidity was different, but it was factored in for the STD RWHP results.
Daily: 2013 e92 M3 DCT / ESS VT2 650 S/C / Akrapovic Evolution / StopTech BBK
Track/Airstrip: 2011 997.2 Turbo S PDK / 725 HP / BBi suspension build
Beater: 2013 X5 3.5sport
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