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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Jan-10-2019, 09:50:39 PM   #1
mannym
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Default Help with Strut and Wheel clearance!

Hey guys,

So I just installed my track set up wheels and needed some help. What is the safest distance between shock/strut and the wheel/tire. Here is my current setup:

AST Coilovers
Adjustable camber plates
Apex Arc-8 18x9.5 et 35 all around
Bridgeston RE-71r 275/35/ 18

The issue I am having is that currently I have 5mm spacers in the front which I want to get rid of. With a 5mm spacer the tires rub against the fender and I would rather not use any spacers. With the 5mm spacers the wheel/tire clear the shock. I tried removing the spacers and installed them without spacers and the wheels still clear the shock they do not touch but by a hair barely. I want to know if anyone has had experience with such tight squeeze. Even though the wheel clears the shock with no spacers what is the safest distance between the two or if it clears at all then I have nothing to worry about?
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Old Fri, Jan-11-2019, 03:48:48 AM   #2
mrgizmo04
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Default Re: Help with Strut and Wheel clearance!

I won't give a definite answer but provide food for thought.

Your tires are not 50+ profile so you prob dont have to worry about elastic deformation all the way at the top of the wheel when you are hitting g's in the bends.

But then you got wheels, wheel bearings, etc which can result in some give relative to strut. Depending on where your bottom collar adjuster sits for your spring (which is not smooth if rubbing the tire) can shred/rip or at least weaken the tire walls over time.

I think some guys normally run 3mm with that offset and 275.

I was in a bit similar situation as you. Ohlins shock body is a bit fat and fitting arc 8 et35 in front with 275, I was barely, but noticeably rubbing on bottom spring collar adjuster (car on a jack, rotating by hand). I ordered 265. Have not installed yet to see how they do.

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'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: VANOS, WPC rod bearings, full SS (SS stepped V1 headers, catted S1, stock S2, SS sport), AFD E85 Proflex kit, Ohlins R&T/Hyperco 375f Swift 672r/GC street tops and camber plates, ST40 355 pfc08, 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, Sachs clutch/flywheel, rear main, Beyer driveshaft, valve adjustment, cooling refresh.

Happy to help with VANOS or any other DIY job around NorCal. Have various specialty tools (VANOS, RTAB, engine bar, valve adjustment, tranny jack, ball joint separator, pilot bearing puller, tap&die kit, etc).
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Old Fri, Jan-11-2019, 04:01:59 AM   #3
mannym
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Default Re: Help with Strut and Wheel clearance!

Quote:
Originally Posted by mrgizmo04 View Post
I won't give a definite answer but provide food for thought.

Your tires are not 50+ profile so you prob dont have to worry about elastic deformation all the way at the top of the wheel when you are hitting g's in the bends.

But then you got wheels, wheel bearings, etc which can result in some give relative to strut. Depending on where your bottom collar adjuster sits for your spring (which is not smooth if rubbing the tire) can shred/rip or at least weaken the tire walls over time.

I think some guys normally run 3mm with that offset and 275.

I was in a bit similar situation as you. Ohlins shock body is a bit fat and fitting arc 8 et35 in front with 275, I was barely, but noticeably rubbing on bottom spring collar adjuster (car on a jack, rotating by hand). I ordered 265. Have not installed yet to see how they do.

Sent from my SM-G950U using Tapatalk

Thnx for the input. Just wondering if under hard cornering there is any give or play between the wheel itself and the lower portion of the strut and wether that space between the wheel and strut changes under those hard corners and Gs
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Old Fri, Jan-11-2019, 04:17:19 AM   #4
mrgizmo04
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Default Re: Help with Strut and Wheel clearance!

Quote:
Originally Posted by mannym View Post
Thnx for the input. Just wondering if under hard cornering there is any give or play between the wheel itself and the lower portion of the strut and wether that space between the wheel and strut changes under those hard corners and Gs
Yeah that is what I meant with my comment about wheel and wheel bearing (bending/giving under high load). I think there is.

Sent from my SM-G950U using Tapatalk
__________________
'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: VANOS, WPC rod bearings, full SS (SS stepped V1 headers, catted S1, stock S2, SS sport), AFD E85 Proflex kit, Ohlins R&T/Hyperco 375f Swift 672r/GC street tops and camber plates, ST40 355 pfc08, 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, Sachs clutch/flywheel, rear main, Beyer driveshaft, valve adjustment, cooling refresh.

Happy to help with VANOS or any other DIY job around NorCal. Have various specialty tools (VANOS, RTAB, engine bar, valve adjustment, tranny jack, ball joint separator, pilot bearing puller, tap&die kit, etc).
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Discussing Help with Strut and Wheel clearance! in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)