wheel widths, 11" rears?
10-09-2017, 08:58 PM
#1
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Thread Starter
wheel widths, 11" rears?
so Im looking at some wheel options, one of them is 8" front 11" rear.
im sure they will fit, but im wondering how much it would affect the handling characteristics?
im sure they will fit, but im wondering how much it would affect the handling characteristics?
10-09-2017, 10:20 PM
#2
I don't think it would cause significant handling issue even on a track, but I don't think it would easily fit. My 10" rear wheels rubbed until I made suspension adjustments. What are the offsets on the rear wheels?
10-10-2017, 07:33 AM
#4
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Rear 968 Cup 2's are 55 offset and front 65 offset.
I made the mistake of changing these to 964 Cup 2's which I had lying around - thought the 'look' would be better.
With a 964 front offset of 52 the difference of 13mm each side I thought would give it a more agressive stance, which it did.
Net effect is it tramlined like a pig - steering would wander off badly on cambered roads. I had to fight to keep it in line. Often unpredicatble when pushing hard on changing road surfaces.
Initally thought this was down to the M030 front sway bar, so I thought of going for the standard sway bar. Then thought it was also compounded by a slightly worn arm bush. Front tyres being good Toyo's so knew they weren't the issue.
Wasn't until I was going through a specialist geo check and fitment check for M030 adjustable Konis all round that I was given a verbal wrist slapping of not sticking to original offsets. The factory set up and suspension/strut/arm design is optimum on the correct offsets. Change the offsets and the strut angle/positioning works harder to keep it where it was meant to be - effectively moving steering forces further out from the car's intended design geometry.
Anyway, before having the Konis installed and a geo set up, I swapped back to the 968 Cup 2's for the 2-hour drive to the specialist. Tramlining and unpredictablility gone! Doh...
Sure, you can play with different wheel designs and offsets I guess, but then the whole package of strut (and maybe arm) design and postioning needs to be part of the deal for maximum performance benefit.
Hope that helps.
I made the mistake of changing these to 964 Cup 2's which I had lying around - thought the 'look' would be better.
With a 964 front offset of 52 the difference of 13mm each side I thought would give it a more agressive stance, which it did.
Net effect is it tramlined like a pig - steering would wander off badly on cambered roads. I had to fight to keep it in line. Often unpredicatble when pushing hard on changing road surfaces.
Initally thought this was down to the M030 front sway bar, so I thought of going for the standard sway bar. Then thought it was also compounded by a slightly worn arm bush. Front tyres being good Toyo's so knew they weren't the issue.
Wasn't until I was going through a specialist geo check and fitment check for M030 adjustable Konis all round that I was given a verbal wrist slapping of not sticking to original offsets. The factory set up and suspension/strut/arm design is optimum on the correct offsets. Change the offsets and the strut angle/positioning works harder to keep it where it was meant to be - effectively moving steering forces further out from the car's intended design geometry.
Anyway, before having the Konis installed and a geo set up, I swapped back to the 968 Cup 2's for the 2-hour drive to the specialist. Tramlining and unpredictablility gone! Doh...
Sure, you can play with different wheel designs and offsets I guess, but then the whole package of strut (and maybe arm) design and postioning needs to be part of the deal for maximum performance benefit.
Hope that helps.
10-10-2017, 07:37 AM
#5
Rennlist Member
Turbo RS cars used 11" ET 62 with 305 section slick tires. Fenders were modified/rolled I think.
Will look fat so good luck!
Will look fat so good luck!
10-10-2017, 03:22 PM
#7
Rennlist Member
Certanly with a wheel combo like an RS you can't expect to get much in comfort and I guess tramlining will be pretty bad depending on which setup is chosen.
I have used 11" and 10" on my 944 Turbo cup with no issues and I will use those wheels on my 968 CS. Ofcourse these cars are racecars but both are registered for the road and driven there occasionaly.
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10-23-2017, 06:03 AM
#9
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Hi.
You will be ok with 11" rears with ET 67 on 295:s. If you want them to be further out against the fenderlip you can always put a spacer on.
You will be ok with 11" rears with ET 67 on 295:s. If you want them to be further out against the fenderlip you can always put a spacer on.
10-23-2017, 07:23 PM
#11
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rolling the fenders.
front tire should be maybe 0~3 cms less than the rear tires.
245-285s is about as much stagger as you'd want to have for a 968.
front tire should be maybe 0~3 cms less than the rear tires.
245-285s is about as much stagger as you'd want to have for a 968.
10-24-2017, 05:05 AM
#12
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10-24-2017, 12:12 PM
#13
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11" BBS E88:s
10-25-2017, 09:51 PM
#14
Burning Brakes
I never understood the point of staggered wheels on a modestly powered car with 50/50 weight distribution. But I do understand that because that's the way Porsche chose to equip these cars, it's hard to come up with a square set-up that looks good without going with very expensive custom wheels.
10-25-2017, 10:34 PM
#15
Are the front wheels of a 968 Turbo RS definitely ET57? I just bought a set of 911 Turbo 20" wheels that were too cheap to pass up. I need to roll the fenders and get shorter tires but I think I can make them work.