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Coilovers Installed, Front Tyres Scraping

black_gtst
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black_gtst Proficient

black_gtst

Posted
Posted

installed some ohlins coil overs in my car, bout 15mm lower than standard but not when cornering hard, tyres scrape on the plastic under the wheel arches. i need to re-gas the shocks but dont think that will fix the prob. has anyone else had same drama? if so what did you do,

cut hole in plastic where tyre is rubbing or,

take plastic out of wheel arches all together?

cheers peoples!

bretto

black_gtst Proficient

black_gtst

Posted
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havent had alignment yet but dont think that will fix prob, car drives and handles great. just seems like the plastic wheel arches are in wrong place lol. its only the fronts doing it by the way. backs are grouse

n15m0 Grand Master

n15m0

Posted
Posted

I had the same problem as well and it was due to me going from a 225/40 18 tyre to a 235/40 18 at the fronts...effectively increasing my overall diameter by 8mm. When I had 225/40 with the same coilover and same height...no scrubbing at all....swap over to 235/40 and it started rubbing the inner plastic guard.

Only scrubs the drivers side inner plastic guard when on full lock going up my driveway and sometimes hard cornering. Also, the more I lowered it the more excessive it would rub, I finally raised it up slightly which decreased it a bit...

not much you can do, I've gotten used to it...best bet is to remove the plastic inner guard if you want...or raise your car slightly to see if it still rubs as much..

(B1) MR_fanny Grand Master

(B1) MR_fanny

Posted
Posted

cutting a hole may increase the chances of the wheel catching onto it and ripping it off all together. get an alighnment and professional advice. id say raise the car abit or get some camber kits to straighten things up. your gonna kill your tyres quicker too. what width fronts are you running? my frond ride height is 350 with 8" and i just make it. i scrape on my passenger side because of the bigger 34smic that pushes the plastic out abit.

urtwhistle Proficient

urtwhistle

Posted
Posted

i had this problem. i wore threw the plastic on the drivers side and my 34 cought fire. the main wiring harness that goes between the batttery b4 the fuses is directly above the wheel u were throguh the plastic and it shorts out and it catchs fire and wont stop untill u kill the battery.

just be carefull i was lucky i got the battery out and chucked a heap of water in there.

chris

black_gtst Proficient

black_gtst

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using 235s on 8.5 rims on front which is prob bit keen? no castor rods, got strut brace but that wont have anything to do with it. its only dropped it down around 12-15mm from standard, the ohlins use a sirclip system to adjust the height so if i was to go up it would be a fair bit, like 30mm so higher than standard.

. i was wanting to get a set of michelin slicks off a carrera cup car for track days to go on my street rims but they prob going to do the same as the road tyres yeah?

could i take the plastic out just for track days?

would adjustable castor rods and an alignment help much?

should i look into a firmer spring for the fronts?

should i get a set of semi-slicks for standard rims that are not so fat? (dont drive my car hard on street so they dont scrub often on the road)

sorry bout all the q's, just tryin to scope out what i should do bout it and thanks heaps 4 advice guys, much appriciated

brett

BHDave Grand Master

BHDave

Posted
Posted

remove the inner guard and roll the lip of the guard up.

I'm pretty surprised that it's happening with the car only 15mm lower to be honest. The wheel will still travel in the same path and the springs are probably stiffer so there shouldn't be as much movement for a given load. i really don't get why there is a problem now when there wasn't one before (assuming the wheels haven't changed).

porsche slicks are a no no. The rolling diameter is significantly higher than the stock rolling diameter of the skyline so more scrubbing. Added to this is that you simply don't have the adjustment to set the suspension up to suit the tyre. I'd be looking at semis but even then you really need some sort of camber adjustment in the front and rear to make the most of them or you will just destroy the outside edges of the tyre in a day or 2.

urtwhistle Proficient

urtwhistle

Posted
Posted

but u see if you remove the plastic it doesnt change the fact theres a bloody great big wiring harness behind there. i actully re inforced the plastic with a peice of tin so if it bottoms out again it will rub on metal not plastic and wires

chris

black_gtst Proficient

black_gtst

Posted
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yeeah its rubbing on the plastic just inside the guard as BH dave said. am happy to get a camber adjustment kit if this will help the prob but thinking i might look into some firmer springs or?....

i agree wit reinforcing it so i dont destroy the harness but trying to get rid of the prob all together.

should i mayb go to a reasonable suspension place and get some advice?

thanks 4 da help

Sydneykid Grand Master

Sydneykid

Posted
Posted

How high (low) is it? Centre of wheel to guard should not be less than 350 mm for the best handling. You can get additional circlip grooves machined into the Ohlins same as Bilsteins. I use 8mm separation with 5 additonal grooves for 50mm of height adjustment.

BTW, good luck geting the (Japanese) Ohlins serviced.

Cheers

Gary

black_gtst Proficient

black_gtst

Posted
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its only bout 10mm lower than standard so i would say bout 260mm from centre to guard. think i might just have to get some stiffer springs for em at this stage. apparently cramer products in melb can service them. have also been told that motorbike shops that deal with ohlins can service them for me too! they have sweeden printed on the sticker so im guessing they are not the jap ones.

cheers guys

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