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      01-07-2009, 05:16 PM   #1
AlpenWhite25
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UnderPowered M3...

I have just Dynoed my M3 in a very respected local Tuning Shop with years of expertise in BMW M engines.What i came across is a Pathetic 322 Whp with BMC Air Filter and Rear ACS Export Exhaust.The Dyno was in 4th gear....but i really dont get it...How come everyone in this forum have a average standart 330 + Whp Stock and me on the other hand have so much less...I could really use you comments here guys...Thank you in advance....
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      01-07-2009, 06:45 PM   #2
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Quote:
Originally Posted by AlpenWhite25 View Post
I have just Dynoed my M3 in a very respected local Tuning Shop with years of expertise in BMW M engines.What i came across is a Pathetic 322 Whp with BMC Air Filter and Rear ACS Export Exhaust.The Dyno was in 4th gear....but i really dont get it...How come everyone in this forum have a average standart 330 + Whp Stock and me on the other hand have so much less...I could really use you comments here guys...Thank you in advance....
All dynos are different - you can't really use them as an absolute measure, they are best used as a relative measure...i.e. did you do a baseline of your car stock?
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      01-07-2009, 06:48 PM   #3
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Quote:
Originally Posted by AlpenWhite25 View Post
I have just Dynoed my M3 in a very respected local Tuning Shop with years of expertise in BMW M engines.What i came across is a Pathetic 322 Whp with BMC Air Filter and Rear ACS Export Exhaust.The Dyno was in 4th gear....but i really dont get it...How come everyone in this forum have a average standart 330 + Whp Stock and me on the other hand have so much less...I could really use you comments here guys...Thank you in advance....
322 vs. average 330 is not a big difference and can be due to a number of reasons that have nothing to do with your car being different.
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      01-07-2009, 07:19 PM   #4
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Take it to the track!

Thats the best dyno!
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      01-07-2009, 11:46 PM   #5
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Pic of the BMC? I'm going to get that rather then the AFE
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      01-08-2009, 12:12 AM   #6
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Quote:
Originally Posted by eagletangogreen View Post
Take it to the track!

Thats the best dyno!
+1

There's a number of reasons for low numbers on the dyno. My 350z put out the lowest numbers on a dyno day with a bunch of others, and I pulled them on the street. ECU's do some crazy things, dealing with weather, temps, gear, etc....
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      01-08-2009, 03:40 AM   #7
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I will post some pictures of the BMC Later on....I believe you might be correct guys...It may also have a lot to do with the fuel i used on the Dyno...or a number of other reasons..But the thing remains...That 322 whp was not actually my baseline.The car was equipped with BMC Filter(It showed 4 whp difference) ACS Export rear mufflers(I had them on so i cant really figure out any hp difference) and Rpi Air Scoops(They send me 2 right ones so i needed to modify the one so i can convert it into left.I did install the Correct one on this Dyno...i am one short.Later on the week it will be installed too.)I used 95 oct fuel...But i really dont trust fuel measurment here in Greece.

Main Question is....What is really the Average Whp on M3 E9X???
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      01-08-2009, 04:03 AM   #8
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Quote:
Originally Posted by AlpenWhite25 View Post
I will post some pictures of the BMC Later on....I believe you might be correct guys...It may also have a lot to do with the fuel i used on the Dyno...or a number of other reasons..But the thing remains...That 322 whp was not actually my baseline.The car was equipped with BMC Filter(It showed 4 whp difference) ACS Export rear mufflers(I had them on so i cant really figure out any hp difference) and Rpi Air Scoops(They send me 2 right ones so i needed to modify the one so i can convert it into left.I did install the Correct one on this Dyno...i am one short.Later on the week it will be installed too.)I used 95 oct fuel...But i really dont trust fuel measurment here in Greece.

Main Question is....What is really the Average Whp on M3 E9X???
As you're in Europe I'm assuming you used 95 RON fuel - you really want to be using 98 RON at a minimum on this type of car.

Fill it up with 98 RON, drive it for a day and then dyno it again, I wouldn't be surprised to see a 10-15WHP gain...
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      01-08-2009, 05:48 AM   #9
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I was at 333whp on a dyno dynamics stock. 338 with the RPi scoops. I had a Remus race exhaust but I'm almost positive I lost 10+ wtq in the low end (very noticeable).
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      01-08-2009, 09:45 AM   #10
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Quote:
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I was at 333whp on a dyno dynamics stock. 338 with the RPi scoops. I had a Remus race exhaust but I'm almost positive I lost 10+ wtq in the low end (very noticeable).
You lost power with a Remus Race exhaust?

How is that possible??

Quote:
Originally Posted by AlpenWhite25 View Post
I will post some pictures of the BMC Later on....I believe you might be correct guys...It may also have a lot to do with the fuel i used on the Dyno...or a number of other reasons..But the thing remains...That 322 whp was not actually my baseline.The car was equipped with BMC Filter(It showed 4 whp difference) ACS Export rear mufflers(I had them on so i cant really figure out any hp difference) and Rpi Air Scoops(They send me 2 right ones so i needed to modify the one so i can convert it into left.I did install the Correct one on this Dyno...i am one short.Later on the week it will be installed too.)I used 95 oct fuel...But i really dont trust fuel measurment here in Greece.

Main Question is....What is really the Average Whp on M3 E9X???
The S65 engine is designed to run on Super Plus 98 RON.

In some places in Europe you may find 100 RON, makes a small difference.
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      01-08-2009, 09:50 AM   #11
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Pic of the BMC? I'm going to get that rather then the AFE
Why the BMC over AFE? Any particular reason?
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      01-08-2009, 09:57 AM   #12
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Does the Dyno take into account altitude?
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      01-08-2009, 04:21 PM   #13
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What I don't get is why the avg is 330 with 414 at the crank, I though the avg was much higher than that? I mean at those losses are greater than those experienced by the N54. No chance the //M is losing a larger percentage of power from the crank to the wheels. Just can't be

Sorry to go OT.....

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      01-08-2009, 06:14 PM   #14
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I have not dynoed my car, but based on drivetrain loss and the stated 414 crank hp the e9x m3 should be somewhere in the 350whp range.
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      01-09-2009, 03:01 AM   #15
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I have not dynoed my car, but based on drivetrain loss and the stated 414 crank hp the e9x m3 should be somewhere in the 350whp range.
Exactly my point....330 Whp range should be arounf 370+ hp ath the Crank.It is my belive the problem has taken more general dimension...The reason for this comment is because i raced actually another M3 both of us When we was almost stock and we were even.....
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      01-09-2009, 05:07 AM   #16
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Quote:
Originally Posted by MMMorish View Post
Why the BMC over AFE? Any particular reason?
Because several people have reported fitment problems from the AFE and I personally think BMC makes the highest quality filters of all companies period. Plus they're used in some F1 cars.
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      01-09-2009, 02:52 PM   #17
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maybe the mods are reducing power. maybe you need a tune to take full advantage.
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      01-09-2009, 10:10 PM   #18
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How many miles on the car?
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      01-10-2009, 02:44 AM   #19
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How many miles on the car?

17.000 Klm aka 10.559 Miles....
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      01-12-2009, 10:47 AM   #20
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I wouldn't fret over the dyno results.

I had a 97 M3 and got it from 189 whp to 264 whp with all sorts of mods, all n/a. I did all my work at the same place and used the same dyno for the tuning and measurements.

Well, we had a dyno day at another local shop and my car made WAY less hp than several others that just had an intake. I would smoke those guys with no problem on the road, but on THAT dyno, my car made less hp than their cars...and even much less than it did on the Mustang dyno.

Thus, even though I know my car had more hp than the stock cars, the dyno did not show that! lol. It made me question dyno's in general. They aint the end-all.

So, don't fret about it. The real measurement is how you stack up against another car on the road/track, not the dyno.
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