944_968CS

Hello everybody,

I am looking for data on the ET on the 968 turbo RS wheels.
I know that the front wheels was 10x18 but the ET?
I know that the rear wheels was 11x18 but the ET?

Please help me. I am planing to put such on my 968 CS

Kind Regards

Bosse P

Jason @ Paragon Products

According to my factory parts list they were 10Jx18 ET 61 and 11Jx18 ET 62.

944_968CS

Thanks for Your answer.
Which problems could I expect when fitting 10x18 ET 61 with 265/35 x 18 up front and 11x18 ET 62 with 295/30 x 18 in the rear and how can I avoid the problems? The car is a 968.

Kind Regards /BP

flash968

what brand tire, diameter springs, spring rates, ride height and camber?

as an example:

with 1.75" lowered, stock spring diameter, 250#, 1.5 degrees negative camber, and 255/35/18 S0-3s, a 9" rim with 57mm offset, was the best that HRE could build for me and maintain clearance from the suspension and bodywork - i have 4mm to the inside and 3mm to the outside, at full swing - they went through a lot just to get that much under there

if you are using a narrower brand tire, like a michelin or something, a 265 would probably fit on the same setup, though be larger outside diameter, and therefore perhaps other issues would arise

61mm offset is going to be a problem though with stock spring diameter - if you have 2.5" diameter springs, you might be ok

if you are running stock ride height, a lot of this problem goes away too

the 62mm rear on an 11 sure seems like a problem too, though i haven't checked that one myself yet - i figured i could prbably get a 10.5 under there, but it didn't buy me any rubber, so it was just more weight for no reason - i am running a 285/30/18 on a 52mm offset on a 10" rim with 2 degrees negative camber and barely clear the outside, but no issues on the inside at all - other guys with a 65mm offset, less camber, and a 265 on a 10" hit on the inside - i think a lot of that one will be dependent on your rear spring rates - if you're running the cup suspension, or something stiff like it, maybe - stock rates though i think will rub at full swing

besides looks, if this isn't a race car, any reason for that much? the weight is going to be a killer on acceleration - that added mass away from the hub makes a huge difference - even though my net weight is down a bit on these wheels, the fact that the weight is proportionately more at the tire and outside of the rim versus the hub than before, changed everything

if you get it to fit, it will look sweet though, and likely stick like glue

944_968CS

Thanks Flash, But I am looking for facts, not Your opinion or the obvious. /Bosse

flash968

i gave you facts, specifically, conditions under which maximums are reached

best of luck

Jason Judd

BP,

I don't think you should have any problems with those tire combinations...That's what I run on my 968 right now.

I have MPSC's with the 265/35/18 up front and 295/30/18 in the back; which sounds exactly like what you're interested in using.

I just switched from CCW's to BBS monoblock race wheels...they were built by BBS for the Rolex Series Cup Cars, and they fit right on my car without any problems at all.

They are so light that I could feel the noticeable difference! The car felt more nimble.

If you need any other info, just let me know how I can help.

Jason

flash968

jason - do you have the stock spring diameter up front? how low is the car? what spring rates do you have?

i really wanted a 10 up front, but HRE said no way, especially with te brand of tire i am running, since it is one of the wider ones in any size, without at least going down to a 2.5" spring

Jason Judd

Flash,

No, I don't have the stock diameter springs...

I don't believe the car is incredibly low. I can drive it around town in a pinch, and I can drive it up and down my driveway, too.

My springs are 700# all around...Not too harsh, but pretty tough for local driving!

flash968

ok - that explains how you can do those widths - that's in line with what HRE said too - maybe i will get lucky with the new smaller diameter front springs, and be able to bump up to a 10, but i think my springs will still be too soft for that, and i'm pretty slammed - i scrape all over the place

no go for the street, but it's encouraging for the race car though - cool

944_968CS

Hello, I would like to here more about the BBS wheels. Regards BP

944_968CS

Hello Jason, What is the factory partnumber of this wheels? Regards BP

Jason Judd

The BBS wheels I have are from a race team that uses them on their Cup cars in the Rolex series. They are 9 X 18 and 11 X 18 and are amazingly light, since they are magnesium and monoblock.

I did have to get longer wheel studs to mount them, but otherwise no modifications were needed.

I do have photos but can't post them on Rennlist because they are too large.

They can be ordered directly from BBS race division, if you wish. I have 2 sets.

Jason

sparky

Hey Jason @ Paragon - that "factory parts list" you have for 968 Turbo - how does one get a copy? I would dearly love to get hold of such data !

TurboCab

Me too....