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Old 2nd February 2004, 23:20   #11
Jayson
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Re: Power Differences on M5's?

Did you follow what ever his name was post awhile ago about dynoing the 03's...I did mine just like that and got 330, only problem was I coun't get the sport button to work with the fuses he suggested. So i guesstimate that I have 330, and maybe another 5-10hp with the sport button. Stock, all i really cared about was a baseline number so i knew where i was starting.

Quote:
Originally Posted by MIB
Hey Hamann7,

Don't stress. There are so many variables with the dyno that it is reasonable to believe that their could be as much as a 15% variance on one to another, or from one day to another.

Maybe the vehicle wasn't secured down tight enough. I picked up 20HP just by sitting in the boot one one dyno.

One dyno guy tried to tell me I had 240Hp. I asked him, In Which particular wheel he felt that 240HP was in.

I still to date haven't got a reading above the DSC Cutoff.

I think DiscoFish summoned it up best the other day. "The fastest way to make someones car slower is take it too the Track."

Trap speed doesn't lie. Do a Quater mile run, don't be too concerned with your E.T's just see what Terminal speed you get.

That is a very accurate way of knowing if the Ponies are there or not.

I can't wait to get back out with the new clutch setup.
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Old 2nd February 2004, 23:30   #12
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Re: Power Differences on M5's?

Jayson
I don't think the sport button makes a difference. It just quickens the throttle response (and steering), but the horsepower should be unaffected.
Regards,
Jerry
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Old 3rd February 2004, 00:41   #13
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Re: Power Differences on M5's?

Quote:
Originally Posted by gsfent
Jayson
I don't think the sport button makes a difference. It just quickens the throttle response (and steering), but the horsepower should be unaffected.
Regards,
Jerry

I was under the impression that the sport button in addition to those things, also opended up the t.b.'s a touch more.
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Old 3rd February 2004, 00:49   #14
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Re: Power Differences on M5's?

Quote:
Originally Posted by gsfent
Jayson
I don't think the sport button makes a difference. It just quickens the throttle response (and steering), but the horsepower should be unaffected.
Regards,
Jerry

Actually, if you open the throttle wide open there is only a steering difference. The fuel response is negated at full throttle.
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Old 3rd February 2004, 00:49   #15
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Re: Power Differences on M5's?

TB's are mechanical devices, they can't open past 100%.....but the rate of opening in relation to the throttle position can be changed electronically......If I am wrong, I am sure someone will correct me!!!:-)
Regards,
Jerry
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Old 3rd February 2004, 00:57   #16
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Re: Power Differences on M5's?

Ok, you guys are scaring me lol Probably going to pick up an 01' durring the summer as I was looking at 00-01 models, as from what I remember a long time ago was a number of 00' models were way off the stated power on the dyno. But now if I get an 01' would it be affected also, 310 rwhp sounds to low for that engine with it's "supposedly" correct output and efficient 6 speed trans, 330 rwhp sounds ok but I actually would have thought it would be a little higher.

Guess I'm going to have to take every car I look at to the dyno lol. I wish it was underrated like my friends 03' Cobra, rated at 390 to the fly but put down 381 rwhp on the dyno back when it was stock (now has a Kenne Bell blower and other mods, f'n torque monster)
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Old 3rd February 2004, 01:07   #17
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Re: Power Differences on M5's?

Quote:
Originally Posted by gsfent
TB's are mechanical devices, they can't open past 100%.....but the rate of opening in relation to the throttle position can be changed electronically......If I am wrong, I am sure someone will correct me!!!:-)
Regards,
Jerry

Yes I know that...But my understanding was that basically, when you give it full throttle they opened up about 98 99 pecent, then the sport button gives it teh full 100.

I know that in other cars, a big mod has become to get the t.b. to fully open as some apperently are not doing so.
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Old 3rd February 2004, 04:59   #18
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Re: Power Differences on M5's?

Hmmmmm, do the numbers really matter cept for bragging rights?

When we take an onramp flat out or punch 2nd gear and climb through the gears or hear the rumble of our exhaust, we all have smiles on our faces knowing that we have one of the finest, fastest best handling cars on the planet. So we take it to a dyno and the computer contradicts our butts and we go into a funk? I shud think not. Besides, I have never heard stated figures of parasitic loss for this engine/drive train, but those numbers that universally come to mind are 18-20%. That said, our 394 crank would range from 315-323 bhp at the wheels. We are all very fortunate to have this automobile considering the alternatives.

Speaking of alternatives, did anyone read the aricle in the latest Car and Driver comparing the M3, M5 and new Cadillac V Series CTS? Wouldn't you really rather have a caddy!!! see , we are all smiles again...

Happy motoring

al
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Old 3rd February 2004, 07:05   #19
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Could there be something wrong here.........

Okay, so according to BMWAG and or its ///M Motorsport division, they claim there could be as much as 10% variation between the HP figures produced by S62 engines, being less or possibly more than the 394 Horse Power indicated by BMWAG. Isn't it odd to say the least that all who have dynoed their beast have come up seriously short or lacking in the HP claimed by BMW. To my knowledge, NO ONE has EVER stated or come forward saying their M5 sedan is actually 10% above the claimed 394 HP by BMW. Its always less/short of what we expect. Now if none of the M5 cars ever made more, above the 10% margin, isn't that flat out false advertising, simply because BMW (Im sure) knows the ///M motors are less than what they claim them to be.
Am I wrong or missing something here? If so, please enlighten me. Thanks.
Robert

Last edited by FAST 5; 3rd February 2004 at 07:08.
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Old 3rd February 2004, 08:21   #20
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Re: Power Differences on M5's?

No wonder I can still keep up with you guys
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