F3X 340mm Brake to 380mm with same caliper

KingPP · 04-15-2022, 08:24 AM

is it possible?

aardate · 04-15-2022, 06:52 PM

I believe the max rotor size you can put on the front is 370mm

Logicoeur · 04-15-2022, 07:10 PM

There are adapters to do Just that.

kern417

dmanb2b · 04-15-2022, 07:40 PM

besides a bracket, you would need a 370/380 caliper

Logicoeur · 04-15-2022, 08:02 PM

Quote:

Originally Posted by dmanb2b

besides a bracket, you would need a 370/380 caliper

No. The bracket (there are two) makes the caliper accept a 380mm rotor. There is one for 340mm calipers and one for the 370mm caliper. The 370 caliper is slapped onto the f8x without any extra bracket, but that's not possible on the f3x, hence the bracket.

dmanb2b · 04-15-2022, 08:47 PM

Quote:

Originally Posted by Logicoeur

No. The bracket (there are two) makes the caliper accept a 380mm rotor. There is one for 340mm calipers and one for the 370mm caliper. The 370 caliper is slapped onto the f8x without any extra bracket, but that's not possible on the f3x, hence the bracket.

Nice...I didn't realize he was making brackets for both calipers

Billfitz · 04-15-2022, 09:27 PM

I don't see the point. A larger rotor will dissipate more heat, but other than in a tracking situation that's really of no benefit. For better initial grab and stopping power you need larger pads to go along with the larger rotor.

KingPP · 04-16-2022, 11:35 AM

there are two versions of the calipers....one for 340mm and one 370/380. i have 340.

but as seen on e90post (https://www.e90post.com/forums/showp...postcount=2047) there is an adapter to drive 380mm rotos on the 340mm calipers.

kern417 is providing them?

Belong · 04-17-2022, 05:43 AM

Quote:

Originally Posted by ElBabo

there are two versions of the calipers....one for 340mm and one 370/380. i have 340.

but as seen on e90post (https://www.e90post.com/forums/showp...postcount=2047) there is an adapter to drive 380mm rotos on the 340mm calipers.

kern417 is providing them?

He sells our BRACKETS..

no need to get them over USA to Poland.. pm us direct... would be just a waste of money and time!

04-15-2022, 08:24 AM	#1
KingPP New Member 0 Rep 23 Posts Drives: G30 Join Date: Jan 2022 Location: POL iTrader: (0)	F3X 340mm Brake to 380mm with same caliper is it possible? Last edited by KingPP; 04-15-2022 at 12:44 PM..
	Appreciate 0 Tweet Quote

04-15-2022, 06:52 PM	#2
aardate First Lieutenant 194 Rep 343 Posts Drives: X4MC Join Date: Aug 2020 Location: Houston, TX iTrader: (0)	I believe the max rotor size you can put on the front is 370mm
	Appreciate 0 Quote

04-15-2022, 07:10 PM	#3
Logicoeur Lieutenant Colonel 994 Rep 1,934 Posts Drives: F30 335i xDrive Join Date: Feb 2018 Location: Boston iTrader: (0)	There are adapters to do Just that. kern417 __________________ F30 335iX \| Remus Axleback \| Fabspeed Catted DP \| VRSF Comp IC \| 18X9 ET35 19lb MT1 \| 255/40/18 ECS \| Ohlins RT Millway Street \| Millway Control Arm Bushings \| Turner Endlinks \| TMH 75mm 14x1.5 Studs \| BMW MPerf LSD \| XDelete \| Pipercross Filter \| MHD Stg2 93
	Appreciate 0 Quote

04-15-2022, 07:40 PM	#4
dmanb2b Banned 2134 Rep 3,361 Posts Drives: G07, F97, F30, E90, E46, E30 Join Date: Jul 2016 Location: NY iTrader: (5)	besides a bracket, you would need a 370/380 caliper
	Appreciate 0 Quote

04-15-2022, 09:27 PM	#7
Billfitz Lieutenant General 8316 Rep 16,199 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	I don't see the point. A larger rotor will dissipate more heat, but other than in a tracking situation that's really of no benefit. For better initial grab and stopping power you need larger pads to go along with the larger rotor.
	Appreciate 1 Logicoeur993.50 Quote

04-16-2022, 11:35 AM	#8
KingPP New Member 0 Rep 23 Posts Drives: G30 Join Date: Jan 2022 Location: POL iTrader: (0)	there are two versions of the calipers....one for 340mm and one 370/380. i have 340. but as seen on e90post (https://www.e90post.com/forums/showp...postcount=2047) there is an adapter to drive 380mm rotos on the 340mm calipers. kern417 is providing them?
	Appreciate 0 Quote