Help wanted: 964 18" wheels
03-10-2012, 09:32 AM
#31
Drifting
Is the No 2 ring above really a spacer? It looks like the sealing ring for the rim parts. It's used with a rubber seal/ring. Did cargraphic maybe forget to mount this ring?!
Thomas
Thomas
03-10-2012, 10:58 AM
#32
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The No 2 ring is a spacer. The wheels came without the spacer but they then fitted a 3mm spacer to the front and 6mm (2x3mm) spacer to the rear to see if the tires would stop rubbing - which they did.
The rear wheels are now being remade (with a different centre to give a 53mm offset) because using a 6mm spacer doesn't leave enough thread for the wheel nuts.
The problem was the offset but not sure why the original wheels fitted some cars (964 RS, 964 Cab and not others (964 C2)
The rear wheels are now being remade (with a different centre to give a 53mm offset) because using a 6mm spacer doesn't leave enough thread for the wheel nuts.
The problem was the offset but not sure why the original wheels fitted some cars (964 RS, 964 Cab and not others (964 C2)
03-10-2012, 05:02 PM
#33
just so we are all clear, can you please summarise the rubbing ... here is a template to make sure we are clear ....
front = 8ET47 = rubbing on apw2007 car = ....
rear = 10ET47 = rubbing on apw2007 car = ...
front = 8ET47 = rubbing on apw2007 car = ....
rear = 10ET47 = rubbing on apw2007 car = ...
03-10-2012, 06:06 PM
#34
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just so we are all clear, can you please summarise the rubbing ... here is a template to make sure we are clear ....
front = 8ET47 = rubbing on apw2007 car = yes
rear = 10ET47 = rubbing on apw2007 car = yes
The rubbing occurred at the top on the rears and where the bumper meets the wing on the fronts.
front = 8ET47 = rubbing on apw2007 car = yes
rear = 10ET47 = rubbing on apw2007 car = yes
The rubbing occurred at the top on the rears and where the bumper meets the wing on the fronts.
03-10-2012, 06:28 PM
#35
front = 8ET47 = rubbing on apw2007 car = top of rears
rear = 10ET47 = rubbing on apw2007 car = bumper meets the wing
rear 10ET47 - what was your rear camber compared to the camber on the other cars which worked ok?
front 8ET47 - what was your front caster setting compared to the other cars which worked ok?
you dont have to answer. we know the answers!
rear - did you check to make sure the 10ET53 will not rub on the inside edge of the tyre against the suspension arm? this is going to be supertight. guess you can always add a spacer.
front - the 8ET50 is 3mm further inwards compared to the 8ET47. how is this going to make a difference to the rubbing at that corner?
rear = 10ET47 = rubbing on apw2007 car = bumper meets the wing
rear 10ET47 - what was your rear camber compared to the camber on the other cars which worked ok?
front 8ET47 - what was your front caster setting compared to the other cars which worked ok?
you dont have to answer. we know the answers!
rear - did you check to make sure the 10ET53 will not rub on the inside edge of the tyre against the suspension arm? this is going to be supertight. guess you can always add a spacer.
front - the 8ET50 is 3mm further inwards compared to the 8ET47. how is this going to make a difference to the rubbing at that corner?
03-10-2012, 06:34 PM
#36
03-10-2012, 06:39 PM
#37
03-10-2012, 06:40 PM
#38
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front = 8ET47 = rubbing on apw2007 car = top of rears
rear = 10ET47 = rubbing on apw2007 car = bumper meets the wing
rear 10ET47 - what was your rear camber compared to the camber on the other cars which worked ok?
front 8ET47 - what was your front caster setting compared to the other cars which worked ok?
you dont have to answer. we know the answers!
rear - did you check to make sure the 10ET53 will not rub on the inside edge of the tyre against the suspension arm? this is going to be supertight. guess you can always add a spacer.
front - the 8ET50 is 3mm further inwards compared to the 8ET47. how is this going to make a difference to the rubbing at that corner?
rear = 10ET47 = rubbing on apw2007 car = bumper meets the wing
rear 10ET47 - what was your rear camber compared to the camber on the other cars which worked ok?
front 8ET47 - what was your front caster setting compared to the other cars which worked ok?
you dont have to answer. we know the answers!
rear - did you check to make sure the 10ET53 will not rub on the inside edge of the tyre against the suspension arm? this is going to be supertight. guess you can always add a spacer.
front - the 8ET50 is 3mm further inwards compared to the 8ET47. how is this going to make a difference to the rubbing at that corner?
Front: the rubbing was on the outside of the tire so by adding the spacer it's moved the wheel inwards
03-10-2012, 06:43 PM
#39
yes, but what happens when you turn the steering wheel? sure the wheel turns on an arc, but I still think you will need to adjust the caster. apparently the performance is better anyway with more caster.
03-10-2012, 06:56 PM
#40
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I'm not doing the work so have no idea what castor setting they have the car.
The garage was not willing to go down that route because they felt it was a compromise. The point was that they were told the wheels should fit the car and they didn't so they wanted to know why.
Rears: they tried adding more camber but it didn't solve the problem so had to increase the ride height - the camber was more than they run on their race cars
Front: they tried changing the castor setting to stop the rubbing on the front of the nearside tire but then found the offside front rubbed on the rear - maybe you could run the car with the front wheels not having the same setting but again it wasn't a route they were willing to take
The garage was not willing to go down that route because they felt it was a compromise. The point was that they were told the wheels should fit the car and they didn't so they wanted to know why.
Rears: they tried adding more camber but it didn't solve the problem so had to increase the ride height - the camber was more than they run on their race cars
Front: they tried changing the castor setting to stop the rubbing on the front of the nearside tire but then found the offside front rubbed on the rear - maybe you could run the car with the front wheels not having the same setting but again it wasn't a route they were willing to take
03-10-2012, 07:11 PM
#41
front - with max caster on the front wheels, i dont see how the front wheels can rub on the rear part of the front wheel arch. take a look at my pics in the link below.
rear - the max we could adjust my camber was -2 degrees. a few guys here on the forum with race cars & slicks are running with -3 degrees (with modified suspension) ... i wonder what sort of race cars your mechanic is looking after?
https://rennlist.com/forums/964-foru...nd-photos.html
https://rennlist.com/forums/964-foru...40-photos.html
rear - the max we could adjust my camber was -2 degrees. a few guys here on the forum with race cars & slicks are running with -3 degrees (with modified suspension) ... i wonder what sort of race cars your mechanic is looking after?
https://rennlist.com/forums/964-foru...nd-photos.html
https://rennlist.com/forums/964-foru...40-photos.html
03-19-2012, 05:16 AM
#42
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I'm really the wrong person to be asking technical questions because I really don't have a clue. When they said it rubbed at the rear I assumed they meant when turning and when I say 'race' cars they most probably said 'track day' cars.
The final solution for the wheels going back on the car are:
Front: 8 x 18" ET47 - they will have 3mm spacer between centre and the outer which will in reality make them ET50
Rears: 10 x 18" ET58 - they will fit 5-7mm spacer to hub to bring wheel back to ET53 which will give them the tolerances they need to make sure the wheel doesn't rub against the arch or the brake pipe
The final solution for the wheels going back on the car are:
Front: 8 x 18" ET47 - they will have 3mm spacer between centre and the outer which will in reality make them ET50
Rears: 10 x 18" ET58 - they will fit 5-7mm spacer to hub to bring wheel back to ET53 which will give them the tolerances they need to make sure the wheel doesn't rub against the arch or the brake pipe
08-10-2012, 06:06 AM
#43
Racer
ET Calculator
Found this calculator, might clear up some of the mystery behind offset?
http://www.1010tires.com/WheelOffsetCalculator.asp
http://www.1010tires.com/WheelOffsetCalculator.asp
08-10-2012, 08:43 AM
#44
if you go for -2 negative camber then about 10ET44 is perfect. i thought my 10ET40 was perfect.
02-04-2014, 09:42 PM
#45
I note the above didn't fit on your car. I now have the same wheels - here are my findings.
Fronts: I run the exact same J, offset, tyre sizes. With -1.5 negative camber, flat arch lips = No rubbing.
Rears: 10J x 18" ET58 (with 15mm spacer = ET43) same tyre sizes. With -3 neg camber = No rubbing.