As some people may know I'm rebuilding my car to race in the LMA next year. I was meant to be racing this year but I've got a bit more involved in the rebuild than I wanted to and now everything on the car is different apart from the basic shell.
What I'm trying to do is to widen the track to maxi spec which is I've done on the rear and I'm just doing on the front.
My problem is I've bought some ET0 offset 9" by 17" wheels which is the only offset I can get away with to give me clearance on the strut, but because I've got to run this offset should I not go as wide with my wishbones?
I had intended to go 40mm wider but now I'm thinking of going only 24mm wider to achieve a similar track to what the works car ran but this is all assuming the works car ran a conventional 306 sort of offset which would be around ET16.
Its a pretty safe guess to assume they ran bespoke uprights which may have allowed them to run a different offset without compromising the steering geometry but although I have a design for these in my head I want to get the car on track before I tackle these.
Any opinions greatly appreciated,cheers Martin.

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Quote "da g man!"
"You've only got to watch the "306 vs ringtaxi" video & you soon realise how good these mod's are! That guy is running Ash's 30mm ARB, Solid Mounts & 23mm Torsion Bars & some adjustments on the camber. Admittedly, the guy is an awesome driver, but it just go's to show how well these cars can handle with the right modification's

arn't the Maxi front hubs similar to this on the works cars?

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Another Broken one

Dan, what size wheels are you running?

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Quote "da g man!"
"You've only got to watch the "306 vs ringtaxi" video & you soon realise how good these mod's are! That guy is running Ash's 30mm ARB, Solid Mounts & 23mm Torsion Bars & some adjustments on the camber. Admittedly, the guy is an awesome driver, but it just go's to show how well these cars can handle with the right modification's

Ears lent us a speedline 16x7 gravel wheel to have a play with a while back, they rekoned it had come off a maxi. The et was huge, we needed a 40+ mm spacer to get them anything like on a 205.

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www.bridgecraftmotorsport.co.uk

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This thread is useless without pics Martin

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Get used to seeing the yellow one !!!
Team 330™
Team "no front end or engine"
Team "LIMITED EDITION" I live for the 306 sticker
Team 0-60 in 6.44 & standing qtr in 14.808 @ 94.55mph all with std engine
203bhp Corolla T-Sport daily driver stealthier than Kwai Chang Caine

I'll get my Kleenex out ready then

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Get used to seeing the yellow one !!!
Team 330™
Team "no front end or engine"
Team "LIMITED EDITION" I live for the 306 sticker
Team 0-60 in 6.44 & standing qtr in 14.808 @ 94.55mph all with std engine
203bhp Corolla T-Sport daily driver stealthier than Kwai Chang Caine

Hi Martin,

The 306 maxis did not run as wide a wheel as you have, from memory they were running a 200mm wide tyre, so would assume they were on an 8inch wide rim at most. Looking at pictures of the front of a maxi, the caliper is fairly close to the back face of the rim, which again would suggest that they aren't running an offset too far from standard. Looking at the pictures earlier in the thread, it looks like the hub is being used to 'adapt' the angle of the damper + they will be built to run bigger bearings and pick up the calipers without brackets.

I run a 7x17 front rim, with a 20mm spacer + the 40mm wider dimma track and that brings my car pretty close to the maxi track width on the front. The 7 inch rim width suited the tyre widths that I run for the class of rally that I am in.

Hope some of that helps - have you switched to a coilover set up on the rear or widened the standard set up?

Martin

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- Maxi rear axle hub spacers +53mm per side
- Maxi front steering rack extensions +40mm per side

IMO your going along the right lines of reasoning - my front wishbones give only 25mm of extra track width, but even with that I've dropped the wheels back to ET29 to try to keep the scrub radius of the wheel fairly sensible (I've gone a bit far really, but there wasn't much choice of a halfway house)

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