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      05-12-2017, 07:16 PM   #1
maduroz
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Are the sport display numbers for hp and tq crank or wheel numbers

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I have 2017 BMW 340i xdrive and I was just wondering if the hp and tq numbers are crank or wheel numbers. The reason asking is because I only saw about 335lbft of tq. and with a 6MT it should be at a unfortunately limited 355tq. If this has been discussed I apologize
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Last edited by maduroz; 05-13-2017 at 10:20 AM.
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      05-12-2017, 07:32 PM   #2
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Should be crank
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      05-12-2017, 07:49 PM   #3
maduroz
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Ok. Thank you
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      05-12-2017, 08:23 PM   #4
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if i mod it will they go up or are the hp and tq numbers coded to always be x and y rpm?
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      05-12-2017, 11:56 PM   #5
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yeah it's 100% crank. HP to the wheels is usually around 65-80% of that number.

But, as we all know BMW tends to under advertise it's HP, so 335i / 435i have been tested at up to 280HP to the rear wheels...which is a lot
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      05-12-2017, 11:59 PM   #6
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Quote:
Originally Posted by 2000Z3M View Post
if i mod it will they go up or are the hp and tq numbers coded to always be x and y rpm?
It's preset to rpm, so mods will not change the numbers.
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      05-13-2017, 10:29 AM   #7
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Quote:
Originally Posted by Project Elite View Post
It's preset to rpm, so mods will not change the numbers.
It's a little smarter than just rpm. It's at least taking throttle position into account as well.
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      05-13-2017, 11:31 AM   #8
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do people really think it's an actual gauge of power? i have always thought it was the most gimmicky addition to idrive. they should have put some useful gauges like boost pressure or water temp.
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      05-13-2017, 12:24 PM   #9
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Quote:
Originally Posted by kern417 View Post
do people really think it's an actual gauge of power? i have always thought it was the most gimmicky addition to idrive. they should have put some useful gauges like boost pressure or water temp.
That would be a lot more useful. Or to be able to customize and pick a set. I've never had them before so I don't know if they are true readings or not.
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      05-13-2017, 01:30 PM   #10
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Quote:
Originally Posted by x97Melbourne View Post
yeah it's 100% crank. HP to the wheels is usually around 65-80% of that number.

But, as we all know BMW tends to under advertise it's HP, so 335i / 435i have been tested at up to 280HP to the rear wheels...which is a lot
I agree that bmw underestimates, but if your numbers are correct, then 280 to the wheels would mean about 400 to the crank. I find that hard to believe, butt dyno-wise.
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      05-13-2017, 02:20 PM   #11
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Quote:
Originally Posted by jparnes1
Quote:
Originally Posted by x97Melbourne View Post
yeah it's 100% crank. HP to the wheels is usually around 65-80% of that number.

But, as we all know BMW tends to under advertise it's HP, so 335i / 435i have been tested at up to 280HP to the rear wheels...which is a lot
I agree that bmw underestimates, but if your numbers are correct, then 280 to the wheels would mean about 400 to the crank. I find that hard to believe, butt dyno-wise.
Rwd whp loss is only around 15-18%
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