One wheel sticking out more

[p.bestie]

Morning all

I have a strange one for you !

I have a H reg (1990) 944 TURBO i am restoring and i have noticed that the passenger rear wheel pokes out 20mm further than the drivers side

Why is this ? anyone else noticed it ?

Its winding me up something chronic as there is nothing bent at all !

Phil

 

[Diver944]

Don't worry its totally normal, its a result of our chassis being designed in the 1970's with slide rule and string []

See this previous discussion from a few weeks ago

http://www.porscheclubgbforum.com/fb.asp?m=844474

 

[al@broadway]

I've 18" wheels on my trackcar S2, there is a difference of approximately 20mm as you say, apparently quite normal..

 

[T3rra]

Same Topic was discussed a few weeks back. But string and tape over 2m 20mm is a lot even to be out off square. The rear transmission can be drop as a whole I wonder if a mounting point is 10mm to one side resulting in 20mm more.

How are you getting this measurement? Level plumb to rear quarter? Is the alinment settings the same both sides?

 

[George Elliott]

Good suggestion T3rra.

20mm is massive, no way was that car like that out of the factory, 3mm maybe

20mm is almost too much for the driveshaft telescopic movement if the hub is that much too far from the Diff

I'd be checking the fit of the rear beam into the shell

the rear camber and toe side to side

If the rear wheels are the same offset (swap 'em side to side to check, then swap back - directional tyres)

Is there a spacer on one side (perhaps the Kwik fitters lost one?)

accident history - is the square white build sticker on the back panel - & is it original?

strange for sure, hope you find the cause

George
944t

 

[pauljmcnulty]

10mm is, I believe, about what a standard shell is out from side to side.

 

[Mike_Pollock]

20mm is too much.

All suggestions above are good.

Not always easy to spot missing spacers as they stick to the wheel or hub and unless you really look you dont notice.

Several types of 944 wheels come in various offsets to fit other Porsches - again not always easy to spot, but the size and offset should be cast on to the wheels, by the valve or on the back of the spokes.

Gulliduckles, CS, Teles and D90s at least came in many widths and offsets (and some in different diameters too!)

 

[Mike_Pollock]

Other thought could be gearbox mount

 

[Monkeythree]

ORIGINAL: T3rra

Same Topic was discussed a few weeks back. But string and tape over 2m 20mm is a lot even to be out off square. The rear transmission can be drop as a whole I wonder if a mounting point is 10mm to one side resulting in 20mm more.

How are you getting this measurement? Level plumb to rear quarter? Is the alinment settings the same both sides?

The mounts for the rear beam are slotted on one side of the car but just 12mm holes on the other side. So the chassis can tolerate variation in the width of the rear beam ( and vice versa) but the rear beam position is not adjustable on the chassis.

 

[Monkeythree]

ORIGINAL: A9XXC

Other thought could be gearbox mount

I think any misalignment of the drivetrain would be taken up in the CV joints. I would assume any variation in the wheel position is a function of the chassis components rather than the drivetrain components.

 

[Monkeythree]

Curiousity got the better of me so I've just been down to my garage and measured my S2. It's up on axle stands at the moment with the wheels off and the rear trailing arms at full extension of the rear dampers ( i.e. Under tension from the torsion bar but at the limit of the travel of the rear dampers).

I put a straight edge against the outside braking surface of the rear discs and then measured horizontally out from the inside of the straight edge to the 12 o'clock position on the wheel arch. Both sides measure as 165mm on mine.

My money is on the OP having different offset wheels or a rogue spacer.

 

[Diver944]

ORIGINAL: Monkeythree

Both sides measure as 165mm on mine.

Oh dear [&o] Looks like yours has been in a shunt, they should be uneven. [] []

 

[Monkeythree]

ORIGINAL: Diver944

ORIGINAL: Monkeythree

Both sides measure as 165mm on mine.

Oh dear [&o] Looks like yours has been in a shunt, they should be uneven. [] []

[][] very good. I did actually "LOL" at that! Maybe I have put it back together wrong? Or should that be right? []

 

[Diver944]

I really wish I had measured my Turbo after it had its huge shunt which needed all new panels on the nearside - wing, door, sill and rear quarter.

I wonder if the bodyshop spent hours trying to get the measurements the same as the offside I'll never know now

 

[Mike_Pollock]

1 - I agree M3 - most obvious thing - may be a front on the back or an extra or missing spacer.

2- Paul, love it - made me LOL too!

3 - We need a "like" button!

 

[George Elliott]

10mm is, I believe, about what a standard shell is out from side to side.

who convinced you?

and how did they do it?

Its a Porsche out of Neckarsulm, not a Marina

Besides the rear hatch glass cannot accommodate such variance, the taillight fit at the corners are very accurate, incremental error such as 10mm is madness. I have 4 cars and they must all have been repaired (none have been) as they are within 2.5mm

 

[944 man]

20mm out measured how? Using the hubs, I hope? Never use the tyres and be aware that two 225/50/16 tyres may be completely different size and shape (beyond 'round', obviously).

 

[Shark]

I had this on a previous car, a white 89 turbo. N/s/r wheel stuck out about 20mm more than other side. I thought the car had been in a bump? I sold it a while ago. Current car 1990 model Turbo has no such trouble. It's a strange one!