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Old 02-12-2007, 09:04 PM   #1 (permalink)
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Question Dynoed the M3

this is a chasis dyno, i removed the wheels...so i have to weigh my wheels to do the equation to get my rough HP and TRQ
a guess is that i subtract about 15-20 hp...as someone on bf.c stated,

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Dynapac's are from NewZeland, they call the rotors flywheels there.





my AFR is retarded, thoughts?
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Old 02-12-2007, 09:22 PM   #2 (permalink)
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Wow your a/f does looks really weird! Do you have a fuel computer!

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Old 02-12-2007, 09:27 PM   #3 (permalink)
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I'd say the cut out at 5500 rpm with the dip in A/F is due to the drop out of the vanos unit... could be a faulty vanos valve... or sensor. Not a big deal...

Dude your putting down some damn good numbers... I'd be happy with those... but add about 30 horses and thats what I got... .. it looks normal... do so research for A/F on other M3's your year and mileage... and you'll probably have the same results... bf.c is a good start to search.

Good luck,

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Old 02-12-2007, 09:37 PM   #4 (permalink)
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Quote:
Originally Posted by 97alpineM3
I'd say the cut out at 5500 rpm with the dip in A/F is due to the drop out of the vanos unit... could be a faulty vanos valve... or sensor. Not a big deal...

Dude your putting down some damn good numbers... I'd be happy with those... but add about 30 horses and thats what I got... .. it looks normal... do so research for A/F on other M3's your year and mileage... and you'll probably have the same results... bf.c is a good start to search.

Good luck,

Les
yea, im thinking vanos too, its been making alot of noise, i just picked up one of bf.c, i might pick up one more just in case....
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Old 02-12-2007, 09:46 PM   #5 (permalink)
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Wait you bought a whole vanos... or just the vanos selenoid?

Les
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Old 02-12-2007, 09:48 PM   #6 (permalink)
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Quote:
Originally Posted by 97alpineM3
Wait you bought a whole vanos... or just the vanos selenoid?

Les
vanos and solenoid

100 bux...meh
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Old 02-13-2007, 12:08 AM   #7 (permalink)
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ya check the vanos unit but those numbers are about as good as you will get with a stock S50
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Old 02-13-2007, 12:41 AM   #8 (permalink)
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Quote:
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ya check the vanos unit but those numbers are about as good as you will get with a stock S50
yea i know, i might re-dyno after replacing it...
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Old 02-13-2007, 09:09 AM   #9 (permalink)
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The numbers look about perfect for the car. I'd expect when you put it on a dynojet you'd put down 200/200.


I'm not a fan of dynapack's because a lot of people (especially on bf.c) try and show these numbers and claim them without telling people it's a chasis dyno. It cannot be used for comparitive purposes.


And those AFR's are all kinds of weird. What did they use? Was it a sniffer? Was it properly placed? Once again this dyno shop can go fuck itself. Go to a real one please because this doesn't look proper at all. And if so you're all kinds of lean to the point where it's scary and unsafe for your motor.


edit: i'm looking at your AFR's once again and that just looks ridiculous. Honestly something wasn't done right and I doubt your car has a problem. It's your dyno shop and their incompentency in my opinion. What was your AFR at idle according to them?
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Old 02-13-2007, 09:41 AM   #10 (permalink)
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I completely forgot about A/F sensor placement... good point.

Les


Quote:
Originally Posted by ///M Power
The numbers look about perfect for the car. I'd expect when you put it on a dynojet you'd put down 200/200.


I'm not a fan of dynapack's because a lot of people (especially on bf.c) try and show these numbers and claim them without telling people it's a chasis dyno. It cannot be used for comparitive purposes.


And those AFR's are all kinds of weird. What did they use? Was it a sniffer? Was it properly placed? Once again this dyno shop can go fuck itself. Go to a real one please because this doesn't look proper at all. And if so you're all kinds of lean to the point where it's scary and unsafe for your motor.


edit: i'm looking at your AFR's once again and that just looks ridiculous. Honestly something wasn't done right and I doubt your car has a problem. It's your dyno shop and their incompentency in my opinion. What was your AFR at idle according to them?
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Old 02-13-2007, 09:42 AM   #11 (permalink)
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Quote:
Originally Posted by ///M Power
The numbers look about perfect for the car. I'd expect when you put it on a dynojet you'd put down 200/200.


I'm not a fan of dynapack's because a lot of people (especially on bf.c) try and show these numbers and claim them without telling people it's a chasis dyno. It cannot be used for comparitive purposes.


And those AFR's are all kinds of weird. What did they use? Was it a sniffer? Was it properly placed? Once again this dyno shop can go fuck itself. Go to a real one please because this doesn't look proper at all. And if so you're all kinds of lean to the point where it's scary and unsafe for your motor.


edit: i'm looking at your AFR's once again and that just looks ridiculous. Honestly something wasn't done right and I doubt your car has a problem. It's your dyno shop and their incompentency in my opinion. What was your AFR at idle according to them?
they say the AFR reads about 1 point higher...which is still high...
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Old 02-13-2007, 09:44 AM   #12 (permalink)
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Where did they put it?... was it a sniffer?... what the hell did they use... that matters a lot.

Les
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Old 02-13-2007, 11:11 AM   #13 (permalink)
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Quote:
Originally Posted by 97alpineM3
Where did they put it?... was it a sniffer?... what the hell did they use... that matters a lot.

Les
they used that piece that sits in the exhaust...is that called a sniffer?
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Old 02-13-2007, 06:22 PM   #14 (permalink)
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Yeah it's a sniffer.


Seriously find a good dyno shop.
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Old 02-13-2007, 07:22 PM   #15 (permalink)
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M power is the man...I doubt you would be putting up those numbers running that lean...then it runs rich and the power falls off?? Crazy stochiometric ratios
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