Unbearable Arch Rub!

Z4M-2006 · Post by **Z4M-2006** » Mon Feb 20, 2017 7:55 pm

Front springs look very low on Jedi's car...

Z4P looks a little higher,and mine higher again..... Considering mine was lowered 35mm,im not sure what yours and the OP's would be..

jamie_z4 · Post by **jamie_z4** » Mon Feb 20, 2017 7:59 pm

Work this out then

Z4Ps wheels and tyres fitted to my car on coilovers at stupid low height and no arch rub

Z4M-2006 · Post by **Z4M-2006** » Mon Feb 20, 2017 8:02 pm

Maybe the coilies didnt have the compliance in the spring to move up the wheel arch..

Weird whatever.....

idej_z4 · Post by **idej_z4** » Mon Feb 20, 2017 9:52 pm

mr wilks wrote:Here's a pic of OPs coupe at Scartop , the black roadster next to it is also running 19s

Surely the black one isn't lowered?

mr wilks · Post by **mr wilks** » Mon Feb 20, 2017 9:55 pm

idej_jedi wrote:
mr wilks wrote:Here's a pic of OPs coupe at Scartop , the black roadster next to it is also running 19s

Surely the black one isn't lowered?

No it isn't but i was mentioning to get a grasp of stock V yours both on 19s

idej_z4 · Post by **idej_z4** » Mon Feb 20, 2017 9:56 pm

Z4M-2006 wrote:This was mine with 8.5j and 235 tyre with 35mm drop.... No rubbing issues at all..

Im convinced the OP's front wheel must have some wacky offset...

Here is the offset info...don't know if that is what you consider 'wacky' - 8 inch at et34 on the front.

Lots of people have mentioned arch rub running the spec you've listed above...maybe you were just lucky?

idej_z4 · Post by **idej_z4** » Mon Feb 20, 2017 9:57 pm

Z4M-2006 wrote:Maybe the coilies didnt have the compliance in the spring to move up the wheel arch..

Can you tell me what you mean by this? Cheers.

idej_z4 · Post by **idej_z4** » Mon Feb 20, 2017 9:58 pm

mr wilks wrote:
idej_jedi wrote:
mr wilks wrote:Here's a pic of OPs coupe at Scartop , the black roadster next to it is also running 19s

Surely the black one isn't lowered?
No it isn't but i was mentioning to get a grasp of stock V yours both on 19s

PHEW!!!

Z4M-2006 · Post by **Z4M-2006** » Mon Feb 20, 2017 11:11 pm

The spring rate on the coilovers maybe much higher than the aftermarket springs..

Looking at your car in the pics, the car is very low.. I have never seen a spring kit take on so low..

I lowered my E85 and 2 x E86's and run 19's with 235's on all of them and never had an issue on any..
Maybe lucky as you say...

idej_z4 · Post by **idej_z4** » Wed Feb 22, 2017 7:28 pm

Very (very) happy to report that the tyre switch seems to be doing the trick. I've not given it a proper thrashing yet, but the bits local to me where I had to wince every time I went over have been no problems! You can even see the difference in the distance between wheel and arch. Yes, they are a little more stretched than I would like, but I'd take that over diminishing arch liners any day of the week.

BEFORE

: IMG_3341.PNG (665.25 KiB) Viewed 1148 times

AFTER

: IMG_3338.JPG (44.69 KiB) Viewed 1148 times

Thanks Andy for the recommendation

mr wilks · Post by **mr wilks** » Wed Feb 22, 2017 7:57 pm

Glad it appears sorted Dan

very often its literally mm's that cause the rub but under compression sounds bad & soon chaffs through the liner which in itself could easily have been more contoured

355Chris355 · Post by **355Chris355** » Sat Mar 04, 2017 8:15 pm

I have a 3.0 Si Sport and was planning on fitting CSL replicas. Is there a definitive spec of wheels and tyres that will result in no issues (e.g. rubbing). Really keen on upgrading (either from CM Wheels or BM Autosport).

Any advice appreciated?

idej_z4 · Post by **idej_z4** » Sun Mar 05, 2017 5:55 pm

355Chris355 wrote:I have a 3.0 Si Sport and was planning on fitting CSL replicas. Is there a definitive spec of wheels and tyres that will result in no issues (e.g. rubbing). Really keen on upgrading (either from CM Wheels or BM Autosport).

Any advice appreciated?

Hi. If you're going to be running 19's (and getting it lowered), then everybody seems to say:

Front: 8.5J Alloys & 225 / 35 Tyres
Rear: 9.5J Alloys & 255 / 30 Tyres

Hope that helps.

Z4-forum.com

Z4-forum.com