SURG4 Nexen: Track Use Tyre Pressures

BradR_Dizzle · 01-27-2018, 08:48 PM

Hello,
I have a 335i Coupe running:
235/40R18 Fronts
275/35R18 Rears
- curb weight about 1600kg/3520lbs

Power at crank: 275kw
Torque: 550nM (hence the fat rears)

First time using SUR4G's this coming weekend. Track sessions about 15min.

Any recommendations form those who have run these about starting cold pressures to achieve 42psi Hot? and also any other 'theories' on optimum hot pressure, 42 seems to be about right, but know others with other ideas (ie 38 psi hot all round etc)

Any experience out there who can comment?

Track surface temp if a sunny day should be 40-50 degrees C, in there somewhere

BradR_Dizzle · 02-01-2018, 06:37 PM

bump

tlow98 · 02-01-2018, 07:28 PM

Chart your tire rollover with some chalk and go from there. I used to run my PSS around 36 hot which was about 28 cold.

BradR_Dizzle · 02-12-2018, 05:29 AM

good advice thank you. what rubber were you running at your 28 to 36 good fit for purpose?

unrulyteach · 02-12-2018, 02:24 PM

Quote:

Originally Posted by BradR_Dizzle

good advice thank you. what rubber were you running at your 28 to 36 good fit for purpose?

PSS= Michelin pilot super sports

01-27-2018, 08:48 PM	#1
BradR_Dizzle Registered 0 Rep 4 Posts Drives: 335i Coupe N55 DCT 2011 Join Date: Jan 2018 Location: Auckland, New Zealand iTrader: (0) Garage List 2011 BMW 335i [0.00]	SURG4 Nexen: Track Use Tyre Pressures Hello, I have a 335i Coupe running: 235/40R18 Fronts 275/35R18 Rears - curb weight about 1600kg/3520lbs Power at crank: 275kw Torque: 550nM (hence the fat rears) First time using SUR4G's this coming weekend. Track sessions about 15min. Any recommendations form those who have run these about starting cold pressures to achieve 42psi Hot? and also any other 'theories' on optimum hot pressure, 42 seems to be about right, but know others with other ideas (ie 38 psi hot all round etc) Any experience out there who can comment? Track surface temp if a sunny day should be 40-50 degrees C, in there somewhere __________________ 2011 BMW 335i Coupe N55 DCT [295kw/550nM] Last edited by BradR_Dizzle; 01-27-2018 at 08:48 PM.. Reason: spelling mistake
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02-01-2018, 06:37 PM	#2
BradR_Dizzle Registered 0 Rep 4 Posts Drives: 335i Coupe N55 DCT 2011 Join Date: Jan 2018 Location: Auckland, New Zealand iTrader: (0) Garage List 2011 BMW 335i [0.00]	bump __________________ 2011 BMW 335i Coupe N55 DCT [295kw/550nM]
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02-01-2018, 07:28 PM	#3
tlow98 Major General 2359 Rep 5,308 Posts Drives: 2009 E91, 2014 F15 x35i Join Date: Aug 2011 Location: Bay Area iTrader: (2)	Chart your tire rollover with some chalk and go from there. I used to run my PSS around 36 hot which was about 28 cold.
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02-12-2018, 05:29 AM	#4
BradR_Dizzle Registered 0 Rep 4 Posts Drives: 335i Coupe N55 DCT 2011 Join Date: Jan 2018 Location: Auckland, New Zealand iTrader: (0) Garage List 2011 BMW 335i [0.00]	good advice thank you. what rubber were you running at your 28 to 36 good fit for purpose? __________________ 2011 BMW 335i Coupe N55 DCT [295kw/550nM]
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