Will 18" rims ruin the the ride on a 993?
Discussion
police state said:
Could be completely off the mark here but I'm not sure hollow Turbo alloys were made with the correct narrow body off set, ie they were made for the TT and 4S cars only (the 2S were apparently supplied with 17" cups or solid turbo 18" as an option).
I assume they were, surely Porsche would not supply the car with them if they were not intended for it?, does anyone have the definitive answer?
I'm maybe misunderstood here...
There's 3 types of turbo alloys;
1 - hollow spoke for turbo and 4S
2 - solid spoke for 2S
3 - solid spoke for narrow body (different offset to above 2 types)
I am unaware if Porsche produced hollow spoke in ET55 offset for narrow body cars.
Hope that's clearer
sleep envy said:
Could be completely off the mark here but I'm not sure hollow Turbo alloys were made with the correct narrow body off set, ie they were made for the TT and 4S cars only (the 2S were apparently supplied with 17" cups or solid turbo 18" as an option).
I assume they were, surely Porsche would not supply the car with them if they were not intended for it?, does anyone have the definitive answer?
I'm maybe misunderstood here...
There's 3 types of turbo alloys;
1 - hollow spoke for turbo and 4S
2 - solid spoke for 2S
3 - solid spoke for narrow body (different offset to above 2 types)
I am unaware if Porsche produced hollow spoke in ET55 offset for narrow body cars.
Hope that's clearer
The car is a '96 Vario. The wheels in question are '18" Turbo Technology', they are definately hollow spoke, and Porsche fitted them from Factory, though they were an optional extra. So I assume they sorted the offsets, etc. But reading some comments here got me thinking...
sleep envy said:
Could be completely off the mark here but I'm not sure hollow Turbo alloys were made with the correct narrow body off set, ie they were made for the TT and 4S cars only (the 2S were apparently supplied with 17" cups or solid turbo 18" as an option).
I assume they were, surely Porsche would not supply the car with them if they were not intended for it?, does anyone have the definitive answer?
I'm maybe misunderstood here...
There's 3 types of turbo alloys;
1 - hollow spoke for turbo and 4S
2 - solid spoke for 2S
3 - solid spoke for narrow body (different offset to above 2 types)
I am unaware if Porsche produced hollow spoke in ET55 offset for narrow body cars.
Hope that's clearer
I'm not sure that's quite right. I think (and I'm remembering from some previous posts that I haven't bothered to look for) the C4S had the full running gear of the turbo BUT solid spoke turbo alloys; by contrast the C2S although it had the wide body it did not have the turbo chassis/running gear, however, it did have hollow spoke turbo alloys as standard. All a bit counter-intuitive I agree.
The C4S is consequently quite a different beast from a C2S.
Dan
tertius said:
a load of old guff
I'm not sure that's quite right. I think (and I'm remembering from some previous posts that I haven't bothered to look for) the C4S had the full running gear of the turbo BUT solid spoke turbo alloys; by contrast the C2S although it had the wide body it did not have the turbo chassis/running gear, however, it did have hollow spoke turbo alloys as standard. All a bit counter-intuitive I agree.
The C4S is consequently quite a different beast from a C2S.
Dan
Dan - you're right. Slow day at work so I had a look through the old posts which confirms your post.
Also have found this;
The hollow spoke technology wheel has smooth spoke backs and came w/metal valve stems while the solid spoke technology wheels are ribbed in the back and came with rubber valve stems.
Here are the part numbers and weights of both wheel types.
Hollow Spoke "Technology" wheels:
993.362.136.00 - ET52 - 19.95 lb (front)
993.362.140.01 - ET65 - 23.36 lb (narrow body rear)
993.362.140.00 - ET40 - 25.13 lb (wide body rear)
Solid Spoke Turbolook wheels:
993.362.136.01 - ET52 - 25.57 lb (front)
993.362.140.04 - ET65 - 29.32 lb (narrow body rear)
993.362.140.03 - ET40 - 31.08 lb (wide body rear)
sleep envy said:
a load of old guff
I'm not sure that's quite right. I think (and I'm remembering from some previous posts that I haven't bothered to look for) the C4S had the full running gear of the turbo BUT solid spoke turbo alloys; by contrast the C2S although it had the wide body it did not have the turbo chassis/running gear, however, it did have hollow spoke turbo alloys as standard. All a bit counter-intuitive I agree.
The C4S is consequently quite a different beast from a C2S.
Dan
Dan - you're right. Slow day at work so I had a look through the old posts which confirms your post.
Also have found this;
The hollow spoke technology wheel has smooth spoke backs and came w/metal valve stems while the solid spoke technology wheels are ribbed in the back and came with rubber valve stems.
Here are the part numbers and weights of both wheel types.
Hollow Spoke "Technology" wheels:
993.362.136.00 - ET52 - 19.95 lb (front)
993.362.140.01 - ET65 - 23.36 lb (narrow body rear)
993.362.140.00 - ET40 - 25.13 lb (wide body rear)
Solid Spoke Turbolook wheels:
993.362.136.01 - ET52 - 25.57 lb (front)
993.362.140.04 - ET65 - 29.32 lb (narrow body rear)
993.362.140.03 - ET40 - 31.08 lb (wide body rear)
Thanks for that, so I can sleep easy that the standard/narrow C2 can indeed accomodate the 18" 'Turbo Techs'.
AndyLeeds, It sounds like you will have to put the same ET65 'Technology' wheels on your's. The bad news is they are more expensive, the good news is they are 6lb lighter than the solids.
sleep envy said:
Also, does anyone have any experience of running the genuine (lighter) 'Turbo Technology' (hollow) wheels on a 993, and if so, is their a significant difference between the 'hollows' and 'solids', and... what tyre pressures do you use for the 'hollows' on your 993?
Could be completely off the mark here but I'm not sure hollow Turbo alloys were made with the correct narrow body off set, ie they were made for the TT and 4S cars only (the 2S were apparently supplied with 17" cups or solid turbo 18" as an option).
Technology wheels were made in both rear offsets, available as option M408 on all models ... solids as provided standard on 4S were 30% + heavier.
My personal choice for 18" wide body M408 tyre pressures is ... 34 f 36 r cold.
HTH, cheers, Maurice.
MauriceC2S said:
Also, does anyone have any experience of running the genuine (lighter) 'Turbo Technology' (hollow) wheels on a 993, and if so, is their a significant difference between the 'hollows' and 'solids', and... what tyre pressures do you use for the 'hollows' on your 993?
Could be completely off the mark here but I'm not sure hollow Turbo alloys were made with the correct narrow body off set, ie they were made for the TT and 4S cars only (the 2S were apparently supplied with 17" cups or solid turbo 18" as an option).
Technology wheels were made in both rear offsets, available as option M408 on all models ... solids as provided standard on 4S were 30% + heavier.
My personal choice for 18" wide body M408 tyre pressures is ... 34 f 36 r cold.
HTH, cheers, Maurice.
I knew there would be a definative voice along sooner or later, mine has the M408 option cheers Maurice. I'll try those tyre pressures.
On another note, my car has a tendency to slightly understeer, then slightly oversteer, when I say slightly, i mean it is a quite a narrow threshold, which means it needs constant attention... it happens more at high speeds on long arcing motorway bends; I know I'm not Ayrton Senna, but have had the car years now, (is well looked after and still nice n tight) so am used to it; In other words, I like to think it's not my driving style, which is 'mature but commited', on these bends it's as if the car is always trying to 'straighten up' I tend to let the car somewhat roll itself through the bend, with gently inputs, but no matter what i do, i still get the understeer - straighten - oversteer - routine; it was last setup geometry-wise, by a 'racing/trackday' veteran in Dachett, and I did notice when it was up on an MOT ramp, the camber seemed to be 'extreme' in the negative direction; any thoughts?...
>> Edited by police state on Tuesday 7th March 23:31
MauriceC2S said:
Sounds like you need alignment with kinematic toe check / adjust, good look at all control arm bushes.
HTH, cheers, Maurice
Cheers for the input Maurice. On its next service, I'll ask them to check the alignment. Regarding the control arm bushes, Porsche GB sorted them out 2 years ago, tightened them up all round (they said...), must say it felt tight when I drove it away. Are the bushes easy to get at and see?, I have a nice neighbour with his own garage pit, and another equally nice bloke who hobbies car enginereering (chief 747 fixer othertimes...). The car is a low miler (60k) and only does long tours, in the winter it hibernates in the garage. One other thing, which may be very telling... when i come off a road hump (at very low speed), the front springs, etc, give out a very distinct scrunching noise) are they knackered?...
andyleeds said:
would these size wheels do the job?
Front wheels are 7.5jx18 ET50.Fitted with 225/40/18 tyres
Rear wheels are 9jx18 ET52. Fitted with 265/35/18 tyres
they are turbo twists?
any info greatly appreciated...
They are the same size tyres I have on my standard C2. Not sure about my Rim sizes though...
Have you not got a manual for your 2S, I'm not being rude asking that; it's just that in my manual, the only model they don't mention is...
the 2S.
and the 4S & Turbo definately don't use the sizes you specified above...
(Interestingly they suggest 18s are not fitted to a cabrio.)
>> Edited by Police State on Wednesday 8th March 19:27
MauriceC2S said:
would these size wheels do the job?
Front wheels are 7.5jx18 ET50.Fitted with 225/40/18 tyres
Rear wheels are 9jx18 ET52. Fitted with 265/35/18 tyres
they are turbo twists?
any info greatly appreciated...
Those are NOT 911 wheels ....
Andy, what were the tyres on that Ad, I could do with some new boots for mine, If you're not buying the non-911 wheels (as Maurice correctly points out) I may ask the seller if he wants to just flog the tyres.
andyleeds said:
here's the link, i don't think he says...
http://cgi.ebay.co.uk/ws/eBayISAPI.dl
They are contis' the wheels and tyres are from a boxster, which is presumably why they will not go on your 993.
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