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BMW M8 Forum and 8 Series Forum BMW M8 and 8-Series General Discussion Bone stock M850i hits the Mustang AWD Dyno - 501 WHP and 549 TQ

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      08-04-2019, 10:04 AM   #1
edwarjejeega
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Underrated as expected, 501 WHP and 549 TQ!

Does anybody know what the corrected of crank HP is with the AWD drivetrain loss?


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      02-04-2020, 11:40 PM   #2
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wow, works out to 610 hp at the crank!

https://www.mk5cortinaestate.co.uk/calculator4.php
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      02-05-2020, 09:20 AM   #3
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Quote:
Originally Posted by edwarjejeega View Post
Underrated as expected, 501 WHP and 549 TQ! @m8fity on IG, does anybody know what the corrected of crank HP is with the AWD drivetrain loss?
isn't it sold as 523 hp and 553 toque? so 500 would be less; thus overrated and over marketing??
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      02-05-2020, 09:29 AM   #4
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Quote:
Originally Posted by Resjudicata View Post
Quote:
Originally Posted by edwarjejeega View Post
Underrated as expected, 501 WHP and 549 TQ! @m8fity on IG, does anybody know what the corrected of crank HP is with the AWD drivetrain loss?
isn't it sold as 523 hp and 553 toque? so 500 would be less; thus overrated and over marketing??
Advertised HP & TQ are measured from the crank. So factoring in a 20% driver train power loss, the car is actually pushing over 600HP at the crank.
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      02-05-2020, 10:53 AM   #5
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Quote:
Originally Posted by ALPINA_DREAMS View Post
Quote:
Originally Posted by Resjudicata View Post
Quote:
Originally Posted by edwarjejeega View Post
Underrated as expected, 501 WHP and 549 TQ! @m8fity on IG, does anybody know what the corrected of crank HP is with the AWD drivetrain loss?
isn't it sold as 523 hp and 553 toque? so 500 would be less; thus overrated and over marketing??
Advertised HP & TQ are measured from the crank. So factoring in a 20% driver train power loss, the car is actually pushing over 600HP at the crank.
ahh makes sense. so how fast is the true m8 competition?
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      02-05-2020, 11:23 AM   #6
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Quote:
Originally Posted by ALPINA_DREAMS View Post
Advertised HP & TQ are measured from the crank. So factoring in a 20% driver train power loss, the car is actually pushing over 600HP at the crank.
These results are certainly awesome for the 850. I had asked those who dynoed a stock M8 if the gains from BMW's stated power have been as significant, but no data has been shared thus far.
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      02-05-2020, 12:25 PM   #7
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Y'all need to stop worrying about crank hp, we have no idea what the xdrive's loss percentage is. Either way, 500+ on the most legit type of dyno is crazy impressive and the car's quarter mile time proves its power is no joke.
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      02-05-2020, 01:03 PM   #8
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Quote:
Originally Posted by Superjackson View Post
Y'all need to stop worrying about crank hp, we have no idea what the xdrive's loss percentage is. Either way, 500+ on the most legit type of dyno is crazy impressive and the car's quarter mile time proves its power is no joke.
the calculation tool allows a selection for all wheel drive which I chose. agreed on the QM 123-124 traps... for a near 5000 lb car this is very impressive indeed.
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      02-05-2020, 07:58 PM   #9
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Quote:
Originally Posted by ALPINA_DREAMS View Post
Advertised HP & TQ are measured from the crank. So factoring in a 20% driver train power loss, the car is actually pushing over 600HP at the crank.
Quote:
Originally Posted by Superjackson View Post
Y'all need to stop worrying about crank hp, we have no idea what the xdrive's loss percentage is. Either way, 500+ on the most legit type of dyno is crazy impressive and the car's quarter mile time proves its power is no joke.
Quote:
Originally Posted by RJC-1 View Post
the calculation tool allows a selection for all wheel drive which I chose. agreed on the QM 123-124 traps... for a near 5000 lb car this is very impressive indeed.
Exactly as Car and Driver's 11.5 second quarter mile at 123 MPH is damn impressive for the M850i!
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      02-05-2020, 08:16 PM   #10
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If the m850 is putting out 600hp it is a tremendous bargain comp'd to the M8 (no offense M8ers )
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      02-06-2020, 04:11 PM   #11
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Quote:
Originally Posted by bloozemanAZ View Post
Quote:
Originally Posted by ALPINA_DREAMS View Post
Advertised HP & TQ are measured from the crank. So factoring in a 20% driver train power loss, the car is actually pushing over 600HP at the crank.
Quote:
Originally Posted by Superjackson View Post
Y'all need to stop worrying about crank hp, we have no idea what the xdrive's loss percentage is. Either way, 500+ on the most legit type of dyno is crazy impressive and the car's quarter mile time proves its power is no joke.
Quote:
Originally Posted by RJC-1 View Post
the calculation tool allows a selection for all wheel drive which I chose. agreed on the QM 123-124 traps... for a near 5000 lb car this is very impressive indeed.
Exactly as Car and Driver's 11.5 second quarter mile at 123 MPH is damn impressive for the M850i!
I could vouch for that. Also did a 3.2 0-60mph with rollout this previous summer.
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      02-10-2020, 10:45 AM   #12
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Beautiful car mine friend
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      02-10-2020, 10:47 AM   #13
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This car is gorgeous.
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      02-10-2020, 11:04 AM   #14
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Is this any different than what a M550 would be or the x5?
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      02-10-2020, 11:27 AM   #15
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Quote:
Originally Posted by JMon View Post
Is this any different than what a M550 would be or the x5?
Quote:
Originally Posted by JMon View Post
Is this any different than what a M550 would be or the x5?
It's the same. N63tu3

Correction. Only for the m50i x5. The other v8 tt has a different version of this n63tu3
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      02-10-2020, 11:27 AM   #16
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the car is a rocket no doubt! sounds awesome as well
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      02-10-2020, 11:31 AM   #17
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Quote:
Originally Posted by GOLFFRR View Post
the car is a rocket no doubt! sounds awesome as well
The takeaway here is the wheel hp and torque. As mentioned above who knows what the drivetrain loss is for the x drive.

Either there is insignificant drivetrain loss for all v8 tt Bmw's meaning Bmw has nailed the stock crank hp and torque figures or they are all underrated by 75+ hp and torque.

Which is it?
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      02-10-2020, 11:53 AM   #18
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Love this car (and the license plate)!!
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      02-10-2020, 11:59 AM   #19
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I raced one the other day, I have mods below. I pulled it so not that impressive for 2 1/2 of my car's cost

Stock turbo, Meth custom tuned (no port injection) n55 m235i
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      02-10-2020, 12:07 PM   #20
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The car's visual appeal easily wins over any dyno results. Gorgeous vehicle.
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      02-10-2020, 12:20 PM   #21
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Originally Posted by jondagger View Post
I raced one the other day, I have mods below. I pulled it so not that impressive for 2 1/2 of my car's cost

Stock turbo, Meth custom tuned (no port injection) n55 m235i
No offense but I'll still take the 8 just for the visuals alone.
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      02-10-2020, 12:24 PM   #22
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Quote:
Originally Posted by ALPINA_DREAMS View Post
Advertised HP & TQ are measured from the crank. So factoring in a 20% driver train power loss, the car is actually pushing over 600HP at the crank.
I'm curious, how do you know there is a 20% drive train loss?
Is there data for this? or is this BMW specific?
I thought cars made these days lose less power loss from the wheel.
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