Turbo offsets

[random hero]

I read on another thread that the latter 944 turbos have a different offset to the earlier models and i was wanting to know how much difference there is ???

 

[sawood12]

I think it was the introduction of ABS that changed the offsets. Pre-ABS offsets were 23.3 and post-ABS offsets are 52.3.

 

[random hero]

Im not sure if mine has abs or not i will have to jack it up and have a look !!!

 

[Fen]

It doesn't matter if it has ABS or not, from MY'87 on the offset was changed across all 944s to allow ABS to be fitted to those models that did have it.

 

[random hero]

I see ,so if i put the hubs on from an 89/90 turbo/s2 on my 88 turbo(early brakes) the offsets will be the same ??.

 

[Fen]

Your 88 Turbo has the same offset as the 89/90 donor car did.

 

[random hero]

Thanks for that !!!

 

[sawood12]

Are you intending to fit the whole hub assembly which includes the knuckle? If so remeber an 89 turbo hub assebly is different from an 89 S2 assembly and your early brakes will not fit as the 89 turbo had the bigger brakes.

 

[random hero]

I am intending to fit the hubs with discs ,bigger calipers,i have the wishbones and rear arms,torsion bars,drive shafts,arb's and shocks but its been a bit difficult to find out exactly what they came off,most of the parts have 89 stamped on them but as they shocks are koni 's(with porsche part numbers on them) most people think its all from an 89 turbo,the person i bought it off had got it for his car but never fitted it and was told it was from a 968 CS but it is'nt. So its going to be a bit of trial and error to get it all fitted which is why i keep putting it off !!!

 

[random hero]

Just checked my car and it does have abs !!

 

[sawood12]

You should be able to tell an 89 turbo hub and knuckle assembly very easily from an early turbo assembly as the calipers mounted completely differently. The early turbo calipers are bolted in with the bolts pointing outwards in the same direction as the hub spindle, whereas the later turbo with the larger caliper was bolted on with bolts that point downward towards the front of the car (well diagonally down but in the general direction of the front of the car).

If they are the 89 turbo hubs then they are a good find as I've been looking for a pair for the past 6 months and have not found any. Plenty of breakers have promised to find me some but all have not come up with the goods so far. People just don't seem to be writing these things off as often as they used to!! I'm surprised some aftermarket company has not started to manufacture their own.

 

[random hero]

Now im confused as the later brakes i have bolt to the hubs in the same way as the early ones on my car,all 4 of the new calipers are the same size front and rear but are a bit bigger than the ones on my car and have the porsche logo printed on rather than imbossed on .

 

[Fen]

Early front brakes, like all rear brakes (talking Turbo) and S2 fronts have bolts that go in axially i.e. the bolt is parallel with the hub spindle. Later Turbo fronts in common with the 928S4 have bigger brakes with bolts that go in radially i.e. they bolt in toward the hub spindle, parallel to the disk face.

If both hubs you have are for axial bolts then I'd say both are the same (unless the spares are for a pre '87 non-ABS offset car).

Early Turbo callipers has embossed Porsche script, later S2 and 968 callipers which are functionally identical have a flush script applied by transfer under the lacquer.

 

[random hero]

Ive just had a look at the spare parts and the calipers are axially mounted and have the transfer on under the lacquer and have 92 stamped on them,the rear arms /hubs have 93 stamped on them ,there is no date on the front hubs but they are for axially mounted calipers,they have abs sensors on the with 951/6 stamped underneath were the sensor is.

 

[Fen]

Sounds like very late S2 or early 968 kit to me.

 

[random hero]

Thats what i was begining to think as well, Do you think the front hubs are from a early turbo (like mine) as they have 951/6 stamped on them ,presuming the calipers as S2/968 will they fit onto my car without changing anything else ???

 

[Fen]

It's likely that the S2 and 968 used the hub from the early Turbo with the 951 part number retained, so they may actually be from a 3.0 litre car. Regardless of what model they came from with that part number they will most certainly either be the same as you already have or potentially from an earlier Turbo with the early offset in which cse they won't fit your car.

The callipers you have should fit straight onto the hubs already on your car as there were only ever 2 mount types used on any 951, hence on any 951 part number hub, and they are very easy to tell apart as you have just done.

 

[random hero]

So it looks like i have S2 brakes and hubs with turbo suspension,i will be fitting the koni shocks as the suspension on the car is past it (and not adjustable). Will the s2s disc be the same size as mine as they are like new.

 

[Fen]

All the brakes will be interchangeable with what you have now. I *think* the same goes for the struts as well.

 

[random hero]

As far as i can tell the struts look just the same as whats fitted exept the ones on the car are not adjustable and not koni's, i think i will fit the complete front hubs to make things easier, did the S2 use the same arb's as ive got them as well !!!