M5 at Grattan Raceway

vafan13 · 05-29-2023, 08:25 PM

Was a hot (for Michigan) memorial weekend at Grattan raceway but a great time. Mishimoto oil cooler did really well, keeping me at ~240F on oil temps despite pushing hard (my friend's e92 m3 hit 270s, oof). PS4S were less enthusiastic about the track temps but despite the whining they survived.

For the Dinan swaybars I ran medium on the front and full stiff on the rear to try and dial out some of the understeer. Ended up one click stiffer on compression and rebound for the front on the KW V3s. Didn't get to messing with the rear, but will next time try a click stiffer there as well.

That said I'm done running stock wheels with PS4S. Going to follow Spiff's lead and go square, but likely with 295/35r19s. Still too much understeer and the stock 265s with the PS4S's more flexible sidewall get overwhelmed.

Most interesting thing to me on track with this is how well throttle can help steer it, even without causing oversteer. I assume the eDiff is helping torque vector by throwing a lot of power to the outside wheel.

Best lap. A PR for me and I blame being slower than my friends scat pack widebody on him having 305s up front. Or something like that 😀. I could have had a 1:32, but let off for both the front and back straights.

Nice action shot with my friend in the passenger seat

ricardofors68 · 05-29-2023, 09:11 PM

Well done

Amitt · 07-15-2023, 11:15 AM

For the dinan sway bars, try full stiff in the front and full soft in the rear.

vafan13 · 07-15-2023, 01:08 PM

Quote:

Originally Posted by Amitt

For the dinan sway bars, try full stiff in the front and full soft in the rear.

For a car which already understeers, that wouldn't be my first thought.
What is your reasoning?

SpeedProtocol · 07-17-2023, 10:01 AM

looks like my car lol

vafan13 · 07-19-2023, 08:33 PM

Quote:

Originally Posted by Droner

looks like my car lol

Sakhir orange is a beautiful color! I know you've done 1/2-miles. Have you taken it to a track yet?

1320racer · 07-24-2023, 12:58 PM

Looks like a blast! I agree for going with a square tire setup and stepping down from 20s.

SpeedProtocol · 07-24-2023, 04:46 PM

Quote:

Originally Posted by vafan13

Sakhir orange is a beautiful color! I know you've done 1/2-miles. Have you taken it to a track yet?

too scared of consumable costs

05-29-2023, 08:25 PM	#1
vafan13 Lieutenant 295 Rep 538 Posts Drives: Sakhir Orange F10 M5 Join Date: Feb 2019 Location: Michigan iTrader: (2)	M5 at Grattan Raceway Was a hot (for Michigan) memorial weekend at Grattan raceway but a great time. Mishimoto oil cooler did really well, keeping me at ~240F on oil temps despite pushing hard (my friend's e92 m3 hit 270s, oof). PS4S were less enthusiastic about the track temps but despite the whining they survived. For the Dinan swaybars I ran medium on the front and full stiff on the rear to try and dial out some of the understeer. Ended up one click stiffer on compression and rebound for the front on the KW V3s. Didn't get to messing with the rear, but will next time try a click stiffer there as well. That said I'm done running stock wheels with PS4S. Going to follow Spiff's lead and go square, but likely with 295/35r19s. Still too much understeer and the stock 265s with the PS4S's more flexible sidewall get overwhelmed. Most interesting thing to me on track with this is how well throttle can help steer it, even without causing oversteer. I assume the eDiff is helping torque vector by throwing a lot of power to the outside wheel. Best lap. A PR for me and I blame being slower than my friends scat pack widebody on him having 305s up front. Or something like that 😀. I could have had a 1:32, but let off for both the front and back straights. Nice action shot with my friend in the passenger seat Attached Images __________________ Sakhir Orange F10 M5 \| KW V3s \| Dinan Swaybars \| Turner Monoballs \| Soul Exhaust \| Mishimoto Oil Cooler Last edited by vafan13; 05-29-2023 at 08:58 PM..
	Appreciate 7 M5Rick60089.00 MarcF10135.00 co_pa223.00 m5rosco210.50 SpeedProtocol378.00 1320racer136.00 The_M6248.00 Tweet Quote

05-29-2023, 09:11 PM	#2
ricardofors68 Lieutenant 326 Rep 535 Posts Drives: '15 F10 M5 Join Date: Nov 2017 Location: DMV Area iTrader: (3)	Well done __________________ '17 C7 Vette GS (bye) / '15 F31 328 ix (sold) / '08 E92 335i (sold)/ '08 E92 M3 (RIP)/'01 M5 (sold, sniff)/'07 M5 (sold)/ '15 M5
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07-15-2023, 11:15 AM	#3
Amitt Private First Class 33 Rep 112 Posts Drives: F10 M5 \| E92 335i Join Date: Mar 2017 Location: New Jersey iTrader: (1) Garage List 2015 BMW M5 [0.00] 2009 BMW 335i [0.00]	For the dinan sway bars, try full stiff in the front and full soft in the rear.
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07-17-2023, 10:01 AM	#5
SpeedProtocol First Lieutenant 378 Rep 319 Posts Drives: '14 F10 M5 - '21 F90 M5 Join Date: Feb 2020 Location: Fort Worth Texas iTrader: (1)	looks like my car lol __________________ --------------------------- -=SpeedProtocol=- 2014 M5 Sakhir Orange- BPM Stage 1 - Soul Performance Exhaust - PG Intakes - CarboTech 1521 Pads - Turner Monoballs 2021 M5 Motegi Red- Stock
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07-24-2023, 12:58 PM	#7
1320racer Second Lieutenant 136 Rep 214 Posts Drives: 2013 BMW F10 M5 Join Date: Oct 2017 Location: Maryland iTrader: (0)	Looks like a blast! I agree for going with a square tire setup and stepping down from 20s. __________________ Current:2021 Mazda MX5, 2013 BMW M5 Tuning Tech Stage 1, 2013 Buick Encore, 2013 Chevy Traverse LTZ Past: 2002 Jeep Grand Cherokee, 2014 BMW 550i MSport, 2005 Jaguar S-Type R, 2000 BMW 540i, 1997 BMW 540i, 1997 WS6 Pontiac Firebird, 1992 Eagle Talon TSI
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