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Old 2nd September 2007, 03:28   #1
///WALL_ST
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Dyno Results: Stock with Charcoal Filters Removed

My only mod so far is removing the charcoal filters. I had one run at 417 - I'm told I have a pretty strong car for stock. For comparison those that have dyno numbers with same setup please post.

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Old 2nd September 2007, 03:38   #2
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Looks like you dyno'd your car in 4th gear. I pulled 422.x stock with carbon air filters removed.

5th gear pulled in low 430s.

Keith
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Old 2nd September 2007, 03:45   #3
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Good call, the pull was done in 4th. You obviously know more about this than I do. Also the car seemed to run on the rich side, perhaps that is normal for stock?
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Old 2nd September 2007, 03:53   #4
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Quote:
Originally Posted by KeithTa View Post
Looks like you dyno'd your car in 4th gear. I pulled 422.x stock with carbon air filters removed.

5th gear pulled in low 430s.

Keith
Keith,

Maybe u can chimp in on my dyno thread I posted especially a/f ratio. I pulled 399hp (CF removed, section1&2+stock muffler, K&N filter). Then after Evo pulley+exhaust, the car pulled 402hp. Then it pulled <400hp after BMC filter installed. I used Dyno Dynamic all on 5th gear (temp 82-92F) I'm right now...

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Old 2nd September 2007, 04:50   #5
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My experiences using dynos as a measure of HP before and after mods has been baffling.

My M6's Mods are:
Carbon air filters removed
K & N stock filter replacement
Supersprint Headers Supersprint Cats
Superprint X-Pipe w/ SS Resonator
Supersprint Sport Mufflers
AA Cam ECU Tune
3.91 Dinan Differential
Schrick Kelleners cams
Evosport Pulley

The cams showed no HP gain - maybe even a loss, the Pulleys a VERY small gain (on one dyno the pulleys showed a loss, the 3.91 diff showed a power loss (see my thread to understand this), the 3 combined components: SS cats, SS resonator, and SS sport mufflers showed a 7.5 whp gain. Headers with software showed a gain of 37 hp...or something (dont recall exactly) (see ALL my old threads for complete information on these tests and reviews) Get this.....I have even done dyno runs after all my mods and have shown HP numbers that were LOWER than when my car was mildly upgraded.

Bottom line, there are simply too many factors that influence the numbers coming out of dynos. I dont fully trust these numbers - I only use them as a guide to see if my car upgrades are moving in the right direction.....but my most recent runs have been "so off" I dont even bother with dyno results anymore.

All I know, is that my car is trapping 120-121 in the quarter mile. It gets consistant 12.1s spinning 1st, 2nd, & a bit into 3rd. The car will run an 11.99 or better if it had traction.

Regardless of what the dyno says, the car moves. So, I wouldnt get too bent out of shape over your dyno results. The best way to gauge your results is to baseline your M5 against another M5. Then install your upgrades and run the cars again. You may be surprised that even though the dyno showed a loss, the race may prove different.

My recent run against my friends Nitrous M6 (nitrous off) I beat him by 7-10 cars or so.....Gustav was in the cars when we raced...he also has the videos of the race with and without Nitrous (hopefully he will post them soon)

Bottom line - what I am trying to say here is that the dynos didnt show me anything close compared to what I saw in the race.

Keith




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Originally Posted by keang24 View Post
Keith,

Maybe u can chimp in on my dyno thread I posted especially a/f ratio. I pulled 399hp (CF removed, section1&2+stock muffler, K&N filter). Then after Evo pulley+exhaust, the car pulled 402hp. Then it pulled <400hp after BMC filter installed. I used Dyno Dynamic all on 5th gear (temp 82-92F) I'm right now...

Thanks.
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Old 2nd September 2007, 05:08   #6
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Quote:
Originally Posted by KeithTa View Post
My experiences using dynos as a measure of HP before and after mods has been baffling.

My M6's Mods are:
Carbon air filters removed
K & N stock filter replacement
Supersprint Headers Supersprint Cats
Superprint X-Pipe w/ SS Resonator
Supersprint Sport Mufflers
AA Cam ECU Tune
3.91 Dinan Differential
Schrick Kelleners cams
Evosport Pulley

The cams showed no HP gain - maybe even a loss, the Pulleys a VERY small gain (on one dyno the pulleys showed a loss, the 3.91 diff showed a power loss (see my thread to understand this), the 3 combined components: SS cats, SS resonator, and SS sport mufflers showed a 7.5 whp gain. Headers with software showed a gain of 37 hp...or something (dont recall exactly) (see ALL my old threads for complete information on these tests and reviews) Get this.....I have even done dyno runs after all my mods and have shown HP numbers that were LOWER than when my car was mildly upgraded.

Bottom line, there are simply too many factors that influence the numbers coming out of dynos. I dont fully trust these numbers - I only use them as a guide to see if my car upgrades are moving in the right direction.....but my most recent runs have been "so off" I dont even bother with dyno results anymore.

All I know, is that my car is trapping 120-121 in the quarter mile. It gets consistant 12.1s spinning 1st, 2nd, & a bit into 3rd. The car will run an 11.99 or better if it had traction.

Regardless of what the dyno says, the car moves. So, I wouldnt get too bent out of shape over your dyno results. The best way to gauge your results is to baseline your M5 against another M5. Then install your upgrades and run the cars again. You may be surprised that even though the dyno showed a loss, the race may prove different.

My recent run against my friends Nitrous M6 (nitrous off) I beat him by 7-10 cars or so.....Gustav was in the cars when we raced...he also has the videos of the race with and without Nitrous (hopefully he will post them soon)

Bottom line - what I am trying to say here is that the dynos didnt show me anything close compared to what I saw in the race.

Keith
Good response. I personally not obsessed with dyno result, just curious. Like u said, just want to make sure I'm moving on the right direction. I don't want to spend extra money to down grade my car, that sound so stupid and make me look foolish. I may try to get some run with stock M5 for comparison.

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Old 2nd September 2007, 06:39   #7
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keang24, the way KeithTa explained it is the way it goes with mods and he's seems to have traveled a long road. With all my mods I went from 408 to 460 rwHP. I had expected more and was initially disappointed but the mechanics of how mods work and their synergy or lack of synergy at times only God could know. With these cars you spend alot and get very little. Good luck m5Ranger
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Old 2nd September 2007, 06:49   #8
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M Ranger you will get more power by putting the stock mid section back in (cats and resonators) you need back pressure. I had your set up SS headers sec 1&2 and race exhaust. Car has more power and runs better with stock mid section in. That was my experience
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Old 2nd September 2007, 07:00   #9
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M Ranger you will get more power by putting the stock mid section back in (cats and resonators) you need back pressure. I had your set up SS headers sec 1&2 and race exhaust. Car has more power and runs better with stock mid section in. That was my experience
Avery & M5Ranger, both of you running SS header with stock 2nd cat and resonator? I consider just stock 2nd cat (still with x-pipe) when installing my Evo header(initially just for loudness reason, but if the car has more power and feel better, I would take it as a plus). I still anxiously waiting for response from neighbor about my new exhaust(Arqray), hopefully with header will not be any louder.
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Old 2nd September 2007, 23:21   #10
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I agree with Keith. My car shows only 445rwhp on an archaic dyno, but the races I have done tell a different story.
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