Backing Plates Now Available for E9x M3/1M

[JamesClay]

Originally Posted by M3V8Driver

The cooling veins inside the stock rotors are designed to pump air in/out. A backing plate would block this function. Because of this, you must rely on adequate air flow through hoses to the backing plates, which can only be accomplished at high speed, and constant high speed at that. I suspect such a product isn't totally applicable to daily drivers, or even DD's that see occasional track use. Two things come to mind; 1) have there been tests done to compare the effectiveness of such a kit for daily-driven cars?, and 2) do such kits affect serviceability, especially from a DIY perspective?

This isn't a new concept or product. They came out in the E30 and early E36 days when cars were well under 3000 pounds and a lot slower and they were important on those models - the need is amplified as you approach 160 and 4k# with a passenger.

These are intended for track use. Many street cars run the plates all the time and connect the hoses for trackdays only. They are an important part of a car that sees track use on a semi-regular basis, and will help save money on pads and rotors and will increase braking performance, especially if you run the car hard for a full session. It does bring marginally more dust into the rotor area, but most cars items like this are mounted on are better maintained than the typical street car and I have never seen any real issues.

[TX335]

Bump...anyone using these?

[Eugene-TAIWAN]

I wonder it they fit all BBK's

[Peter Griffin]

Check these, they fit most BBK!
https://www.facebook.com/media/set/?...551&type=3

[JamesClay]

Originally Posted by Eugene-TAIWAN

I wonder it they fit all BBK's

Not universally, but pretty much. We have modified them to work on stock brakes also. Ideally, you want to get the air into the center of the hub so the rotor vanes can pump the air through the center of the rotor, not directed to just the inside face. We usually do metal backing plates, but the carbon allows us to shape the intake tube to get the air more on the ID as intended. Difficult given the dimensions of the brakes on this car.

[PrimeBMW]

AR Auto Service in Lake Oswego, OR has installed the Apex inlets and the Turner CF backing plates. It was not my car but I did see the installation with StopTech 380mm rotors. The CF backing plates needed to be trimmed so that the back lip did not ride on the rotor.

[Eugene-TAIWAN]

Originally Posted by JamesC

Not universally, but pretty much. We have modified them to work on stock brakes also. Ideally, you want to get the air into the center of the hub so the rotor vanes can pump the air through the center of the rotor, not directed to just the inside face. We usually do metal backing plates, but the carbon allows us to shape the intake tube to get the air more on the ID as intended. Difficult given the dimensions of the brakes on this car.

does the hose the leads to the back plates tear easy?

[Modena NYC]

I see bits and pieces but not clear how you get inlets on a stock bumper without a (not DD friendly) front splitter.

Also if something has to be "trimmed" then...its not really a kit...YET

[1MOREMOD]

i did a 3 inch duct thru the lower felt portion below the front bumper with apex gt4 ducts.

[Bubbles]

Looks good

[Modena NYC]

yeah chris show more! what backing plates did you use?

[klammer]

Yes, more info please.

[1MOREMOD]

i have a whole thread dedicated to this install. i think its titled gt4 duct install. i have the system set up as 2 parts with one running from the undertray to the inner fender well and the second from the inner fender well to the backing plates so its removable for the winter. i have the components for the second half but havent put it together yet trying the first half out to see what benefit it gives.

[e92_m3]

^^^Very nice write-up man.^^^