BMW M3 Dynos (models: 1988-2002, modded and stock)
10-25-2003 | 07:01 PM
#41
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Originally posted by Crazy Sellout
ahh the brains of a nissan owner unleashes
ahh the brains of a nissan owner unleashes
I see what Gavrill is saying; we're saying the same thing only he just can't seem to figure that out. I only wanted to know
a. what is lost by removing those fuses (which your post above helps explain)
b. if someone is going to show me a STOCK m3 dyno, why is it fair to pull fuses from the car? Is this not similar to me yanking off my cats?
10-25-2003 | 07:03 PM
#42
Race Director
Joined: Dec 2001
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Originally posted by Crazy Sellout
damn it here. I went searching and this is what i found.
Its a traction problem when you are dynoing. Since the rear wheels are moving that much faster than the front wheels, which are stopped, it cuts it at 6500 rpm.
damn it here. I went searching and this is what i found.
Its a traction problem when you are dynoing. Since the rear wheels are moving that much faster than the front wheels, which are stopped, it cuts it at 6500 rpm.
10-25-2003 | 07:06 PM
#43
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Joined: Jan 2001
Posts: 34,937
Likes: 638
From: Chicago Burbs
errrrr
all those dynos are showing is that the ECU wont allow the car to rev over 6500 IF THE FRONT WHEELS ARENT MOVING. So some will pull certain fuses to get rid of that. But there are ways around that. On the street its different cuz the front wheels would be moving so you can rev over 6500 which will of course give more power.
You are confusing me on the removing your cats.
Would you like me to find a dyno where a guy didnt pull his fuses out and then still redlined?
all those dynos are showing is that the ECU wont allow the car to rev over 6500 IF THE FRONT WHEELS ARENT MOVING. So some will pull certain fuses to get rid of that. But there are ways around that. On the street its different cuz the front wheels would be moving so you can rev over 6500 which will of course give more power.
You are confusing me on the removing your cats.
Would you like me to find a dyno where a guy didnt pull his fuses out and then still redlined?
10-25-2003 | 07:09 PM
#45
Thread Starter
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From: Washington DC (NOVA)
Originally posted by zeroday
BINGO!! If gavrill had explained this we wouldnt hav been going back and forth. this makes sense, and no i would not consider this cheating.
BINGO!! If gavrill had explained this we wouldnt hav been going back and forth. this makes sense, and no i would not consider this cheating.
I wrote above:
"I am not clear of why the ECU wont let them redline the engine in the first place, but I dont doubt it does. As you see from the several dynos, no car could go near the redline"
So what does it matter why the M3 cant be dynoed to redline. The fact that it can't be dynoed to redline is what counts. So they pull fuses and they make it go to redline (we just dont have a dyno from the above source currenlty).
Why do you make things so difficult?
10-25-2003 | 07:12 PM
#46
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Originally posted by Crazy Sellout
errrrr
all those dynos are showing is that the ECU wont allow the car to rev over 6500 IF THE FRONT WHEELS ARENT MOVING. So some will pull certain fuses to get rid of that. But there are ways around that. On the street its different cuz the front wheels would be moving so you can rev over 6500 which will of course give more power.
You are confusing me on the removing your cats.
Would you like me to find a dyno where a guy didnt pull his fuses out and then still redlined?
errrrr
all those dynos are showing is that the ECU wont allow the car to rev over 6500 IF THE FRONT WHEELS ARENT MOVING. So some will pull certain fuses to get rid of that. But there are ways around that. On the street its different cuz the front wheels would be moving so you can rev over 6500 which will of course give more power.
You are confusing me on the removing your cats.
Would you like me to find a dyno where a guy didnt pull his fuses out and then still redlined?
removing stock parts to make your car perform better makes the car no longer a 'stock' car. My point was that if you pulled fuses to make the car run higher rpm's then it could be considered cheating if you are trying to show 'stock' results. Your explanantion of the front wheel issue, which is obviously confusing the ECU somehow helpls explain this and make it in my mind somewhat less than 'cheating' the stock dyno.
In response to your last comment...thought you said redline could not be obtained without the front wheels moving at a certain rate relatove to the rear wheels?
10-25-2003 | 08:14 PM
#49
Suzuka Master
Joined: Sep 2000
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From: Woodstock, GA
Originally posted by zeroday
BINGO!! If gavrill had explained this we wouldnt hav been going back and forth. this makes sense, and no i would not consider this cheating.
BINGO!! If gavrill had explained this we wouldnt hav been going back and forth. this makes sense, and no i would not consider this cheating.
10-25-2003 | 09:46 PM
#51
Race Director
Joined: Dec 2001
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Originally posted by scalbert
Or maybe had you not made assumptions and used reasonable deduction the picture would have been clear. :P
Or maybe had you not made assumptions and used reasonable deduction the picture would have been clear. :P
10-26-2003 | 01:44 AM
#53
Team Owner
Joined: Feb 2001
Posts: 23,362
Likes: 4,273
From: Los Angeles
Originally posted by darrinb
thats weird how they stop at 6.5k on the dyno
thats weird how they stop at 6.5k on the dyno
MAN..... dude... go back 1 page and read and then it s not gonna be weird anymore......
because the FRONT WHEELS ARENT MOVING... NO TRACTION... that is why.
ps... i wonder how many times can an E46 M3 go redline befor ethe engine blow up
i need to go test on my friend's M3...
10-26-2003 | 12:04 PM
#55
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Joined: Jan 2001
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From: Chicago Burbs
Originally posted by oonowindoo
ps... i wonder how many times can an E46 M3 go redline befor ethe engine blow up i need to go test on my friend's M3...
ps... i wonder how many times can an E46 M3 go redline befor ethe engine blow up
i need to go test on my friend's M3...
Hasnt blown up yet.
10-26-2003 | 02:43 PM
#59
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Originally posted by gavriil
It's not the dyno, it's the M3 having the problem.
It's not the dyno, it's the M3 having the problem.
its pretty obvious, at least to me, that he wasn't blaming the dyno with that statement...you seem to misunderstand people alot.
10-26-2003 | 04:13 PM
#60
Thread Starter
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Joined: Oct 2000
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From: Washington DC (NOVA)
Originally posted by zeroday
its pretty obvious, at least to me, that he wasn't blaming the dyno with that statement...you seem to misunderstand people alot.
its pretty obvious, at least to me, that he wasn't blaming the dyno with that statement...you seem to misunderstand people alot.
He wrote: "A dyno that only tests to 6250 is worthless."
I can also guess that he means something different, but I dont, because he did not write that. If he writes what he means to write (like most of us), then I have to take his "writing" for that. Which means, what he wrote above is not correct.
10-26-2003 | 05:18 PM
#63
Instructor
Joined: Mar 2001
Posts: 243
Likes: 0
From: San Francisco
Anyone care to explain... a 2002 M3 is supposed to put down around 262 lbs/torque, right? If that M3 wasn't taken anywhere near redline then how the hell did he achieve those numbers without revving the engine to its desired rpm - 7900 rpm? oh nevermind... just found out maximum torque comes at a lofty 4900 rpm. Stupid me
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