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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > E91 335d brake options



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      09-16-2017, 08:36 AM   #1
bsmotorsport
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E91 335d brake options

My current front discs (cheap motor factor ones I think) have warped pretty bad after trying out my new map... So, my thoughts are, the calipers seem up to the job
The cheap pads and discs don't. Thinking get the 2 piece z4 35is rotors for a performance gain (slightly) and also the aluminium bell will make things look that bit better too. But I would prefer them drilled which in the UK seems to be a none starter. Can only find ecs in the usa and can't imagine shipping heavy discs is cheap. So then thought go 370mm from the F series, which come drilled so would look the part. Can I just get a 22mm adaptor made up to shift my 335d callipers out to fit the 370mm disc? The measurements I've checked (thickness, bore etc) all seem identical other than the increase in diameter. Has anyone tried this combo? And finally, with these calipers what would be the ideal fast road pad?
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      09-16-2017, 10:15 AM   #2
jwebb335xi
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Quote:
Originally Posted by bsmotorsport View Post
My current front discs (cheap motor factor ones I think) have warped pretty bad after trying out my new map... So, my thoughts are, the calipers seem up to the job
The cheap pads and discs don't. Thinking get the 2 piece z4 35is rotors for a performance gain (slightly) and also the aluminium bell will make things look that bit better too. But I would prefer them drilled which in the UK seems to be a none starter. Can only find ecs in the usa and can't imagine shipping heavy discs is cheap. So then thought go 370mm from the F series, which come drilled so would look the part. Can I just get a 22mm adaptor made up to shift my 335d callipers out to fit the 370mm disc? The measurements I've checked (thickness, bore etc) all seem identical other than the increase in diameter. Has anyone tried this combo? And finally, with these calipers what would be the ideal fast road pad?
Thanks
Steve
I certainly don't have the answers to these question, but I have comments.

I us the z4 rotors on the front of my 335xi. Arguably, they are lighter than stock 335xi rotors which could provide small benefits. That said, lightweight wheels would make a larger differences.

The only benefit I experience with these rotors is that they don't turn into big rusty blobs. And, for that reason alone, I am comfortable with the added expense.

If you're considering larger discs, would it make sense to buy the matching caliper and caliper bracket, dust shield, etc....?

Good luck!
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