My B58 MPPSK dyno numbers

cobra2814 · 01-19-2019, 08:00 PM

Went to the dyno today to lay down some numbers. Dyno was a dynojet and my car is a stock b58 with the mppsk tune running through the 8 speed auto. Car was running on California’s finest 91 octane “premium” but anyway. My best numbers were 331 rwhp and 380 rwtq. The horsepower number was right about where I thought it’d be but my torque number was a surprise. The midrange on these engines is que fuerte! Dyno graph attached. Now the question.....do I mod?

RTPenland · 01-19-2019, 08:47 PM

well you asked the question so....with the numbers a Mission Performance tune is producing I would suggest a simple engine and trans flash to push you deep into the 400++ range

ReRe · 01-20-2019, 02:49 AM

Thank you for doing this! The torque figure is certainly impressive, however I'm actually surprised by the horsepower figure. I was expecting somewhere in the mid 340's to the wheels. Not a huge difference, but likely do to our crummy 91 octane fuel here in socal...

eluded · 01-20-2019, 02:58 AM

Quote:

Originally Posted by cobra2814

Now the question.....do I mod?

You already started, why stop now

bimmer456 · 01-20-2019, 05:02 AM

Dynojet shows more wheel torque than claimed by BMW. It's also lower which I can confirm. The 8AT should downshift sooner or unlock the torque converter more often like the B48 I feel myself shifting manually more often.

TodmordenLad · 01-20-2019, 05:31 AM

Quote:

Originally Posted by bimmer456

Dynojet shows more wheel torque than claimed by BMW. It's also lower which I can confirm. The 8AT should downshift sooner or unlock the torque converter more often like the B48 I feel myself shifting manually more often.

I find that I use the manual shift as well to downshift one cog more often than on previous auto box/engine combos. I do this when I'm not really needing to press on and use kickdown (which usually drops two or more cogs)
A bit annoying but the only downside of the B58 with MPPSK I've found so far

mike@x-ph.com · 01-22-2019, 07:55 PM

Thank you for sharing OP

oregondonor · 01-22-2019, 10:31 PM

Thanks for sharing the dyno results. Very cool that you have a baseline now for future comparisons.

Looking forward to seeing some mods and another dyno post!

01-19-2019, 08:00 PM	#1
cobra2814 Private First Class 112 Rep 122 Posts Drives: 2018 BMW M4 Competition Join Date: Sep 2018 Location: Oakland, California iTrader: (0)	My B58 MPPSK dyno numbers Went to the dyno today to lay down some numbers. Dyno was a dynojet and my car is a stock b58 with the mppsk tune running through the 8 speed auto. Car was running on California’s finest 91 octane “premium” but anyway. My best numbers were 331 rwhp and 380 rwtq. The horsepower number was right about where I thought it’d be but my torque number was a surprise. The midrange on these engines is que fuerte! Dyno graph attached. Now the question.....do I mod? Attached Images
	Appreciate 2 FaRKle!4011.50 eluded3029.00 Tweet Quote

01-19-2019, 08:47 PM	#2
RTPenland Lieutenant 407 Rep 557 Posts Drives: Many BMWs Join Date: Mar 2018 Location: East & West Coasts iTrader: (0)	well you asked the question so....with the numbers a Mission Performance tune is producing I would suggest a simple engine and trans flash to push you deep into the 400++ range
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01-20-2019, 02:49 AM	#3
ReRe Private First Class 398 Rep 102 Posts Drives: M2 Join Date: Nov 2015 Location: SoCal iTrader: (0)	Thank you for doing this! The torque figure is certainly impressive, however I'm actually surprised by the horsepower figure. I was expecting somewhere in the mid 340's to the wheels. Not a huge difference, but likely do to our crummy 91 octane fuel here in socal...
	Appreciate 0 Quote

01-20-2019, 05:02 AM	#5
bimmer456 Major General 2959 Rep 5,989 Posts Drives: 340i Join Date: Nov 2016 Location: Pasadena, CA iTrader: (0)	Dynojet shows more wheel torque than claimed by BMW. It's also lower which I can confirm. The 8AT should downshift sooner or unlock the torque converter more often like the B48 I feel myself shifting manually more often.
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01-22-2019, 07:55 PM	#7
mike@x-ph.com BimmerPost Supporting Vendor 24143 Rep 190,707 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Thank you for sharing OP __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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01-22-2019, 10:31 PM	#8
oregondonor Lieutenant 88 Rep 509 Posts Drives: 2016 435i Join Date: Feb 2014 Location: Pacific NW iTrader: (0) Garage List 2016 BMW 435i ZHP [10.00] 2023 BMW X3 xDrive 30i [0.00]	Thanks for sharing the dyno results. Very cool that you have a baseline now for future comparisons. Looking forward to seeing some mods and another dyno post! __________________ 2016 435i MSport ZHP #85
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