Questions on running OE CSL/ZCP 19x9.5 et 27 squared on the e46 M3.

[Sharocks]

How much backpad is on the 19x9.5 zcp wheel. One idea I had if there is a thick backpad is maybe shave the backpad by 5 to 7 mm essentially raising the offset from et27 to an et32 or et34. With an 19x9.5 et32 or et34 you should be able to run a 265/30/19 tire without much negative camber.


Sharocks

Would you say due to the concave nature of the 19x9.5 zhp wheel that since the 380mm Brembo caliper sits higher up the then 355mm Brembo caliper that brake clearance would not be an issue?

I can't comment on a 380mm kit since I have 355's but if your running the 4 piston GT caliper I don't think you'll have any issues. Like I said I have miles of space. I'm running -3.5 up front on 265/35/19 square but have run 275 square in the past on the same wheels.

I can fit a 12.5mm spacer up front and still have fender clearance.

[robgill]

I have also run square CSLs with both TCK DA and Ohlins R&T with to clearance issues. I ran 265/30 on all 4 wheels. Also no issues up front with BBK or 996 Brembos. You do need at least 2-2.5 of camber for it to look right. Agree with post above that another solution would be to machine the backpads if you want less camber. I thought they looked pretty good as is:

[bmw m3 s50]

How much backpad is on the 19x9.5 zcp wheel. One idea I had if there is a thick backpad is maybe shave the backpad by 5 to 7 mm essentially raising the offset from et27 to an et32 or et34. With an 19x9.5 et32 or et34 you should be able to run a 265/30/19 tire without much negative camber.


Sharocks

Would you say due to the concave nature of the 19x9.5 zhp wheel that since the 380mm Brembo caliper sits higher up the then 355mm Brembo caliper that brake clearance would not be an issue?

[Sharocks]

On my TCK DA's I did not need to use spacers to clear 355/4 Brembo's up front. Miles of space.

[r4dr]

I bought my car with square ZCP wheels and staggered tires (245 fronts, 275 rear). Like you said, rear is no issue even with 12mm spacers.

Fronts might be another story. I have stock camber (stock top hats) except for lowering on KW v2 coilovers. The fronts are around 13.25" center cap to fender. This setup results in more rear camber than up front just from the innate negative camber gain you get from lowering a car with this suspension type and stock length arms.

The front has a stupid amount of poke. The 245 tire is stretched on the 9.5" wheel, and the rim of the wheel is actually out past the fender. The fronts rub on full compression.

Long way of saying, I think even with my 245 tire stretched on 9.5" up front, I need more negative camber than stock. And I have more negative camber than you do, stock for stock, because I'm lower than Pro Kit springs will go. If you want to run 265 up front I think you're looking at -2 or even -2.5* of front camber. And if you're going to run that wide of a tire up front, you might as well run square 265 or 275 and bite the camber bullet.

Can't comment on BBK.

[bmw m3 s50]

Hey guys,

I had a few questions on running OE CSL/ZCP 19x9.5 et 27 squared on the e46 M3. Here the specs:

I currently have Brembo 380mm 4 piston front BBK and 345mm 4 piston rear BBK.
Will be running Koni Yellow Adjustable shocks with possibly Eibach Pro Kit lowering springs.

I would like to run OE CSL/ZCP 19x9.5 et 27 squared with a 275/30/19 in the rear and a 265/30/19 in the front.

My questions are:


Will I run into issues with rubbing running this wheel and tire setup? ------- I assume in the rear I will be fine, my concern is in the front. I would prefer to run stock camber.

Will this setup clear my current Brembo BBK setup?

If I converted my BBK from Brembo 380mm 4 piston front BBK and 345mm 4 piston rear BBK to the Porsche 996 BBK setup using ZCP rotors will I have any issues running OE CSL/ZCP 19x9.5 et 27 squared?