Akrapovic Install (Evolve)

Imran@Evolve · 07-22-2009, 11:53 AM

Here are the results from just the Akrapovic Evolution System

Flywheel figures for all those in Europe

And wheel power for all those stateside

Does what Akrapovic says it does - rare for manufacturer claims to match up to the real world these days.

askiles · 07-22-2009, 11:56 AM

It is great that the numbers match up, and they actually tell the truth. They do not list numbers with ECU tune, just what they sell you.

-Andy

stylinexpat · 07-22-2009, 12:39 PM

Quote:

Originally Posted by Imran@Evolve

Here are the results from just the Akrapovic Evolution System

Flywheel figures for all those in Europe

And wheel power for all those stateside

Does what Akrapovic says it does - rare for manufacturer claims to match up to the real world these days.

What about Torque gains??

Imran@Evolve · 07-22-2009, 12:58 PM

Torque gains are in the left hand axis. Pretty much 25 ft/lbs plus throught the rev range.

mixja · 07-22-2009, 01:29 PM

Impressive gains!

stylinexpat · 07-22-2009, 02:45 PM

Quote:

Originally Posted by Imran@Evolve

Torque gains are in the left hand axis. Pretty much 25 ft/lbs plus throught the rev range.

Nice, thanks. What do you reckon the gains would be on top of this with a good ecu tune?

mixja · 07-23-2009, 12:39 AM

Donbona - what are your impressions of drone with this exhaust?

Cloud · 07-23-2009, 02:26 AM

Is there a drop between 2000-2500 rpm? Many other dynos of the Akrapovic show that.

Donbona · 07-23-2009, 03:30 AM

Quote:

Originally Posted by mixja

Donbona - what are your impressions of drone with this exhaust?

At standstill the car is very quiet.. there isnt much drone at all.. overall the exhaust system is almost perfect.

askiles · 07-23-2009, 03:55 PM

Why is your graph cut off down at around 3k RPM's, and does not show any lower? I had mine dynoed today, and there is a big dip at about 2.5k. Did this happen to yours? The guys are assuming it was due to such a great flowing system, that the enginer leans way out (and it did), and take a second to compensate. This was verified by looking at the AFR's. Anyways, let me know if yours did the same thing. Thanks!

-Andy

stylinexpat · 07-23-2009, 06:03 PM

Quote:

Originally Posted by askiles

Why is your graph cut off down at around 3k RPM's, and does not show any lower? I had mine dynoed today, and there is a big dip at about 2.5k. Did this happen to yours? The guys are assuming it was due to such a great flowing system, that the enginer leans way out (and it did), and take a second to compensate. This was verified by looking at the AFR's. Anyways, let me know if yours did the same thing. Thanks!

-Andy

Did you get a tune as well? Other then the dip how were the power gains?

mixja · 07-23-2009, 09:06 PM

Quote:

Originally Posted by askiles

Why is your graph cut off down at around 3k RPM's, and does not show any lower? I had mine dynoed today, and there is a big dip at about 2.5k. Did this happen to yours? The guys are assuming it was due to such a great flowing system, that the enginer leans way out (and it did), and take a second to compensate. This was verified by looking at the AFR's. Anyways, let me know if yours did the same thing. Thanks!

-Andy

Fact is when you do down pipes of any nature, you really need to get an ECU remap designed specifically for down pipes (e.g. Powerchip Stage II).

I'd suggest the engine is still running closed loop fuelling around 2500RPM and ECU is not dealing with the changes in O2 sensor readings very well (since there are no longer any cats in front of the O2 sensors).

askiles · 07-23-2009, 10:18 PM

ESS is working on a tune for the E92 M3 using my car. They are now working on one for the M3 with a high flow exhaust like this. We just thought is was crazy to see this dip, and everywhere else, it gained a bunch of power just like Akra claims. My graphs look nearly identical to these posted as far as the curve, and difference in stock vs Akra power.

-Andy

lambobambo · 05-28-2010, 05:22 AM

Do you have any sound clips?

07-22-2009, 11:53 AM	#23
Imran@Evolve BimmerPost Supporting Vendor 5370 Rep 3,789 Posts Drives: All of them Join Date: Jun 2008 Location: Bedfordshire UK iTrader: (0)	Here are the results from just the Akrapovic Evolution System Flywheel figures for all those in Europe And wheel power for all those stateside Does what Akrapovic says it does - rare for manufacturer claims to match up to the real world these days.
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07-22-2009, 11:56 AM	#24
askiles Major 56 Rep 1,164 Posts Drives: 2008 M3 Sedan - Alpine White Join Date: Apr 2009 Location: Phoenix, AZ iTrader: (2)	It is great that the numbers match up, and they actually tell the truth. They do not list numbers with ECU tune, just what they sell you. -Andy __________________ 2008 M3 Sedan- Alpine White
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07-22-2009, 12:58 PM	#26
Imran@Evolve BimmerPost Supporting Vendor 5370 Rep 3,789 Posts Drives: All of them Join Date: Jun 2008 Location: Bedfordshire UK iTrader: (0)	Torque gains are in the left hand axis. Pretty much 25 ft/lbs plus throught the rev range.
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07-22-2009, 01:29 PM	#27
mixja Captain 50 Rep 780 Posts Drives: 2011 E90 DCT Silverstone Join Date: Jun 2008 Location: Beverly Hils, CA iTrader: (1)	Impressive gains!
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07-23-2009, 12:39 AM	#29
mixja Captain 50 Rep 780 Posts Drives: 2011 E90 DCT Silverstone Join Date: Jun 2008 Location: Beverly Hils, CA iTrader: (1)	Donbona - what are your impressions of drone with this exhaust?
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07-23-2009, 02:26 AM	#30
Cloud Lieutenant 62 Rep 484 Posts Drives: AW 2009 E92 6MT Join Date: Nov 2006 Location: Rowland Heights iTrader: (0)	Is there a drop between 2000-2500 rpm? Many other dynos of the Akrapovic show that.
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07-23-2009, 03:55 PM	#32
askiles Major 56 Rep 1,164 Posts Drives: 2008 M3 Sedan - Alpine White Join Date: Apr 2009 Location: Phoenix, AZ iTrader: (2)	Why is your graph cut off down at around 3k RPM's, and does not show any lower? I had mine dynoed today, and there is a big dip at about 2.5k. Did this happen to yours? The guys are assuming it was due to such a great flowing system, that the enginer leans way out (and it did), and take a second to compensate. This was verified by looking at the AFR's. Anyways, let me know if yours did the same thing. Thanks! -Andy __________________ 2008 M3 Sedan- Alpine White
	Appreciate 0 Quote

07-23-2009, 10:18 PM	#35
askiles Major 56 Rep 1,164 Posts Drives: 2008 M3 Sedan - Alpine White Join Date: Apr 2009 Location: Phoenix, AZ iTrader: (2)	ESS is working on a tune for the E92 M3 using my car. They are now working on one for the M3 with a high flow exhaust like this. We just thought is was crazy to see this dip, and everywhere else, it gained a bunch of power just like Akra claims. My graphs look nearly identical to these posted as far as the curve, and difference in stock vs Akra power. -Andy __________________ 2008 M3 Sedan- Alpine White
	Appreciate 0 Quote

05-28-2010, 05:22 AM	#36
lambobambo First Lieutenant 59 Rep 348 Posts Drives: BMW M2 Comp Join Date: Jan 2009 Location: Winchester, UK iTrader: (0)	Do you have any sound clips?
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