[david in germany]

Ok, I have read a lot of posts pertaining to the 335I front brakes on the 328I and almost every post said that you need the hoses from the 335I. Looking at realoem.com it shows the same hose for the 335I and the 328I am I missing something? Why do people swap out the lines other than upgrading to better lines when they are the same?

[justpete]

Originally Posted by david in germany

Ok, I have read a lot of posts pertaining to the 335I front brakes on the 328I and almost every post said that you need the hoses from the 335I. Looking at realoem.com it shows the same hose for the 335I and the 328I am I missing something? Why do people swap out the lines other than upgrading to better lines when they are the same?

Fashion.

[david in germany]

Originally Posted by justpete

Fashion.

I guess red lines ALWAYS look cooler than black!

[justpete]

Originally Posted by david in germany

I guess red lines ALWAYS look cooler than black!

Heh. Yeah, not that anyone can really see them anyway...

[Tom Droze]

Originally Posted by justpete

Heh. Yeah, not that anyone can really see them anyway...

Perhaps, but I know they are there!

On a different note and to the OP, I have toyed with the idea of a brake upgrade on my 328i but I've been rather impressed with the performance of the stock brakes. Also, the 335i brake caliper is just as ugly looking as the 328i brake caliper, there is just more ugly to look at.

[justpete]

Originally Posted by Tom Droze

Perhaps, but I know they are there!

On a different note and to the OP, I have toyed with the idea of a brake upgrade on my 328i but I've been rather impressed with the performance of the stock brakes. Also, the 335i brake caliper is just as ugly looking as the 328i brake caliper, there is just more ugly to look at.

Yeah, I've run a couple of different braided stainless lines as well thinking at least they're better than OE for abrasion resistance, not that it matters a whole lot but what the heck...

True, the 335i brake upgrade is just as ugly but it also won't make that much of a difference in stopping power.

For the op: Pads, fluid, and tires will have a much greater impact. Larger rotors are mainly useful for improved cooling to allow for heavy use on the track but fairly pointless on the street.

[david in germany]

Originally Posted by justpete

Yeah, I've run a couple of different braided stainless lines as well thinking at least they're better than OE for abrasion resistance, not that it matters a whole lot but what the heck...

True, the 335i brake upgrade is just as ugly but it also won't make that much of a difference in stopping power.

For the op: Pads, fluid, and tires will have a much greater impact. Larger rotors are mainly useful for improved cooling to allow for heavy use on the track but fairly pointless on the street.

Unless you drive on the autobahn like my wife and I do. when I drive my wife's 328i I do notice a difference between it and my 335i. The 335i brakes feel much more confidence inspiring. I really don't care for bling so looks are not the issue. Slowing down from 150mph and able to do it over and over without issues is why I am doing it.
The autobahn can be harder day to day than a track depending on traffic.

[Delta0311]

If you are doing the upgrade then also get the rotors from the 335, otherwise this is pointless.

[Tom Droze]

Originally Posted by david in germany

Unless you drive on the autobahn like my wife and I do. when I drive my wife's 328i I do notice a difference between it and my 335i. The 335i brakes feel much more confidence inspiring. I really don't care for bling so looks are not the issue. Slowing down from 150mph and able to do it over and over without issues is why I am doing it.
The autobahn can be harder day to day than a track depending on traffic.

So the 328i will actually go 150 MPH? Wow I didn't know that! With respect to the brakes, and as Justpete suggested, a good brake fluid, better brake pads, good tires are essential to braking confidence; and I also found the brass caliper guide pins also make a big difference in the feel of the brakes. I am also surprised hard brake use is necessary on the Autobahn. . . unless you're in a M3 coming up on a 328i.

[justpete]

Originally Posted by david in germany

Unless you drive on the autobahn like my wife and I do. when I drive my wife's 328i I do notice a difference between it and my 335i. The 335i brakes feel much more confidence inspiring. I really don't care for bling so looks are not the issue. Slowing down from 150mph and able to do it over and over without issues is why I am doing it.
The autobahn can be harder day to day than a track depending on traffic.

I think the 135i front brakes can be retrofitted without modification and there are piston/seal/boot rebuild kits from Stoptech and RacingBrake to improve heat tolerance which I've done and they work exceedingly well with Carbotech pads. Rear brakes are OEM with Carbotech pads and solid guide rod bushings. The car stops very well with Toyo R1R tires, much much better than OEM and with no fade. Torque RT700 fluid or the like would be necessary as well.

I should note I'm also using Hard Brake titanium shims in the front caliper, 0.5mm thick.

[david in germany]

Originally Posted by Tom Droze

So the 328i will actually go 150 MPH? Wow I didn't know that! With respect to the brakes, and as Justpete suggested, a good brake fluid, better brake pads, good tires are essential to braking confidence; and I also found the brass caliper guide pins also make a big difference in the feel of the brakes. I am also surprised hard brake use is necessary on the Autobahn. . . unless you're in a M3 coming up on a 328i.

The 328i is a very nice car and will do 150 without any issues (with the M Sport's increased higher speed) I don't think there is really a need to go other than stock pads and rotors. The parts are really well made.

Originally Posted by Delta0311

If you are doing the upgrade then also get the rotors from the 335, otherwise this is pointless.

I am not really sure if it is possible to run 328i rotors with 335i calipers. I have no intention on trying it.

[david in germany]

Originally Posted by justpete

I think the 135i front brakes can be retrofitted without modification and there are piston/seal/boot rebuild kits from Stoptech and RacingBrake to improve heat tolerance which I've done and they work exceedingly well with Carbotech pads. Rear brakes are OEM with Carbotech pads and solid guide rod bushings. The car stops very well with Toyo R1R tires, much much better than OEM and with no fade. Torque RT700 fluid or the like would be necessary as well.

I should note I'm also using Hard Brake titanium shims in the front caliper, 0.5mm thick.

no need to step down to the 135i brakes as the rotors are larger on the 335i and they are a straight swap.

[justpete]

Originally Posted by david in germany

no need to step down to the 135i brakes as the rotors are larger on the 335i and they are a straight swap.

Sure, your call. Check to make sure you don't have to change master cylinder, can't remember if it's really necessary, probably not.

[david in germany]

Originally Posted by justpete

Sure, your call. Check to make sure you don't have to change master cylinder, can't remember if it's really necessary, probably not.

No, all parts are the same from master cylinder all the way to the caliper. Caliper and rotor are different, I assume that the pads are also different but it would not surprise me if they were the same.

[justpete]

Originally Posted by david in germany

No, all parts are the same from master cylinder all the way to the caliper. Caliper and rotor are different, I assume that the pads are also different but it would not surprise me if they were the same.

Then you should be good with bias, no worries. Enjoy.