Brake Fluid QTY

m2compred5 · 10-10-2021, 05:48 PM

I need to switch to DOT 4 brake fluid for my first track day. Does anyone know how much fluid is required for a complete flush?

AM///X3M · 10-10-2021, 09:35 PM

Quote:

Originally Posted by m2compred5

I need to switch to DOT 4 brake fluid for my first track day. Does anyone know how much fluid is required for a complete flush?

Get 2 liters. You might be good with one but when flushing the old one you might spend a little more than 1

I recommend this one.

Castrol SRF Racing Brake Fluid - 1 Liter 12512 https://www.amazon.com/dp/B002TM4GBQ...A5W4NN8PABZD9V

gmhl10 · 10-11-2021, 08:38 AM

Damn~~~ and I thought the Motul RBF660 was pricey.

Maynard · 10-11-2021, 09:25 AM

SRF is overkill for part-time trackers, and it doesn't mix well w/ other fluids so you need to really flush the hell out of the system (and run the ISTA for the ABS) to do a real swap. A 660-level fluid is more than your brakes need (the other parts of them will melt at about the boiling point). Get twice as much, then keep the extra with you at the track in case you need to bleed them unexpectedly. Once a bottle is open, it is used or trash, don't try to store half bottles.

COChris · 10-11-2021, 10:13 AM

You'll need 1.5 quarts for a flush. SRF is the jam. Add braided SS lines and titanium shims, and you have world-class brakes. But yes, overkill for the occasional track day.

inTgr8r · 10-11-2021, 10:45 AM

Quote:

Originally Posted by COChris

You'll need 1.5 quarts for a flush. SRF is the jam. Add braided SS lines and titanium shims, and you have world-class brakes. But yes, overkill for the occasional track day.

Do you have a source for the Ti shims?
I've been looking for a set to mitigate dust boot issues.

COChris · 10-11-2021, 11:07 AM

Quote:

Originally Posted by inTgr8r

Quote:

Originally Posted by COChris

You'll need 1.5 quarts for a flush. SRF is the jam. Add braided SS lines and titanium shims, and you have world-class brakes. But yes, overkill for the occasional track day.

Do you have a source for the Ti shims?
I've been looking for a set to mitigate dust boot issues.

https://www.opmustang.com/store/p340..._FRONT_.html#/

https://www.opmustang.com/store/p339...-_REAR_.html#/

inTgr8r · 10-11-2021, 11:11 AM

COChris
Thanks, appreciate the help

10-10-2021, 05:48 PM	#1
m2compred5 Private 46 Rep 81 Posts Drives: 2020 BMW M2 Comp Join Date: Jun 2020 Location: Connecticut iTrader: (0)	Brake Fluid QTY I need to switch to DOT 4 brake fluid for my first track day. Does anyone know how much fluid is required for a complete flush?
	Appreciate 0 Tweet Quote

10-11-2021, 08:38 AM	#3
gmhl10 First Lieutenant 385 Rep 367 Posts Drives: Not a M2 CS Join Date: Feb 2020 Location: Austin, TX iTrader: (0)	Damn~~~ and I thought the Motul RBF660 was pricey.
	Appreciate 0 Quote

10-11-2021, 09:25 AM	#4
Maynard Colonel 3848 Rep 2,873 Posts Drives: 228iX & M2C Join Date: Mar 2016 Location: Upstate NY iTrader: (1)	SRF is overkill for part-time trackers, and it doesn't mix well w/ other fluids so you need to really flush the hell out of the system (and run the ISTA for the ABS) to do a real swap. A 660-level fluid is more than your brakes need (the other parts of them will melt at about the boiling point). Get twice as much, then keep the extra with you at the track in case you need to bleed them unexpectedly. Once a bottle is open, it is used or trash, don't try to store half bottles.
	Appreciate 0 Quote

10-11-2021, 10:13 AM	#5
COChris Captain 889 Rep 739 Posts Drives: M2C Join Date: Feb 2015 Location: West iTrader: (1)	You'll need 1.5 quarts for a flush. SRF is the jam. Add braided SS lines and titanium shims, and you have world-class brakes. But yes, overkill for the occasional track day.
	Appreciate 0 Quote

10-11-2021, 11:11 AM	#8
inTgr8r Lieutenant General 2426 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	COChris Thanks, appreciate the help
	Appreciate 1 COChris888.50 Quote