H&R Coilovers- rear arch rubbing

4.2 V8 32v Naturally Aspirated - 414 bhp
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HarpreetSingh
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H&R Coilovers- rear arch rubbing

Post by HarpreetSingh » Fri Nov 01, 2019 11:08 am

Good afternoon all! Hoping someone could help

Since my DRC pipes corroded, I took the plunge to get the old bird sat on some H&R's with upper and lower control arm bushes replacement. Unsure of how far its been lowered, but noticed that the wheels sat way too far in for my liking so had I threw some 12mm spacers on- looks just right! The issue I have however Is the rear passenger side appears to sit a fraction lower than the rear drivers side. As a result, it scrapes over most bumps that are on the left side of the road/going around a roundabout at anything over 20mph but faultless when turning left (which causes lean to the right) however going across a large crevice or dip in the road and I hear scraping all over the place.

Now when this was all fitted, my mechanic said its likely the fronts will "settle" and need raising slightly if he's set them too low. Looks like it just needs raising 5mm on the fronts and we'll be ok. But he told me the rears have been set as high as they could, although the rear passengers side gives me just about one fingers clearance whilst the drivers side rear is a full fingers clearance.

Had a poke and listen around and sounds like the rear arch liner is rubbing against the tyre wall on the passenger side, but could there be any other reason as to why theres an imbalance in the height at the rear if they really have been set to maximum?

For info, running standard 19" wheels, 12mm spacers and H&R Monotube coilovers.

Many thanks in advance for any help or advice you helpful folk could give me! :jump_clap:

coffey555
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Re: H&R Coilovers- rear arch rubbing

Post by coffey555 » Fri Nov 01, 2019 11:39 am

Most people run 8mm front and 10mm rear spacers on the standard OEM wheels. 12mm rubs.

I am running 8mm all round with no rubbing.

Tyre profile can also cause rubbing.
Misano Red RS4 B7 Avant

James1984
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Re: H&R Coilovers- rear arch rubbing

Post by James1984 » Fri Nov 01, 2019 11:46 am

9753EBB6-40F9-4C1B-B46E-0A1874D8F486.jpeg
Is it lower than that? Mines on H&R too
7C70A8C7-8E8B-4756-887F-E763C58E555E.png
That’s my measurements from top of wheel rim to arch
2007 B7 RS4 Saloon, Phantom Black, Forge Oil Cooler Kit, custom home made air feed, H&R Coilovers, H&R anti roll bars, 10mm H&R Spacers, Milltek decat downpipes, Milltek Non Res Valved Exhaust, Reyland Motorsports front & rear discs with Hel braided Hoses, full underbody overhauled inc powdercoated subframes and arms, 034 solid subframe bushes and every joint, arm or bush replaced.

HarpreetSingh
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Re: H&R Coilovers- rear arch rubbing

Post by HarpreetSingh » Fri Nov 01, 2019 1:22 pm

James1984 wrote:
Fri Nov 01, 2019 11:46 am
9753EBB6-40F9-4C1B-B46E-0A1874D8F486.jpeg

Is it lower than that? Mines on H&R too

7C70A8C7-8E8B-4756-887F-E763C58E555E.png

That’s my measurements from top of wheel rim to arch
That's weird because looking at the photo it looks at a pretty similar height. Im at work at the moment but when I get home i'll park on some level ground and get some measurements on here- maybe even some pictures too If I can get my browser to upload them :shock:

coffey555
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Re: H&R Coilovers- rear arch rubbing

Post by coffey555 » Fri Nov 01, 2019 1:28 pm

The height is not the problem. He is running 10mm spacers and you are running 12mm.

Change the spacers.
Misano Red RS4 B7 Avant

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Covkiller
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Re: H&R Coilovers- rear arch rubbing

Post by Covkiller » Fri Dec 27, 2019 10:47 pm

Just get rid of the spacers, also if you get rubbing on your front arches do not get them rolled, have them professionally flattened. You should really get your coilvovers setup professionally and it will sit evenly.
RS4 B7, Mugello Blue, K&W V3 & HR ARBs, set up by Centre Gravity, Milltek Valved Non Res & cat bypass pipes, BMC air filter, braided hoses, DOT 5.1, Terraclean, MRC Full Carbon Clean, MRC remap 448PS 477NM, 20" S7 alloys with 4mm spacers & Hawke spigots 66.6 > 57.1, AP Racing front discs. Sold Sept 2019. Now rocking an F80 M3

TrevoRS4
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Re: H&R Coilovers- rear arch rubbing

Post by TrevoRS4 » Sun Dec 29, 2019 2:53 pm

Covkiller wrote:
Fri Dec 27, 2019 10:47 pm
Just get rid of the spacers, also if you get rubbing on your front arches do not get them rolled, have them professionally flattened. You should really get your coilvovers setup professionally and it will sit evenly.
Professionally flattened? Curious how this can be done without rolling?

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Covkiller
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Re: H&R Coilovers- rear arch rubbing

Post by Covkiller » Mon Dec 30, 2019 12:29 am

Heated and tapped back. But be very careful as Aluminium as we all know has a very low melting point. This is why you need someone who knows what they're doing. Rolling can also crack the lips.
RS4 B7, Mugello Blue, K&W V3 & HR ARBs, set up by Centre Gravity, Milltek Valved Non Res & cat bypass pipes, BMC air filter, braided hoses, DOT 5.1, Terraclean, MRC Full Carbon Clean, MRC remap 448PS 477NM, 20" S7 alloys with 4mm spacers & Hawke spigots 66.6 > 57.1, AP Racing front discs. Sold Sept 2019. Now rocking an F80 M3

Shockerboy
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Re: H&R Coilovers- rear arch rubbing

Post by Shockerboy » Fri Jan 03, 2020 10:01 pm

Is it possible that you have a little more camber on the side that isnt touching
If the heights are set correct side to side than the only thing that could cause this is camber , adjust a little more negative camber on the side that touches

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