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The Panasport 10 spokes that I put on the '88 (track car) are a great fit except for the fact that the 9" rears sit inside the fender lip about 3/4". I'd like to widen the stance by 1 1/2" or so by bringing the wheels out to the lips.
I know that there's a minimum exposed thread length that needs to be met when using spacers, and the thickness of the wheel interface comes into play. As a general rule, would stock lugs on an S4 be long enough to add 15-20mm spacers?
What 928 factory spacers are the most prevalent?
Any reason spacers would be a bad idea?
Picked up a set of these last week for mine while I run my spare wheels. I'm happy with them. Granted, I don't need the bolts and they say they won't fit a 928, but they do.
With slide on spacers your studs are too short... which is why the wide track 84-86 which used slide on have LONGER studs. Sean opted for spacers which bolt on and have new studs for the wheels. Also Porsche wheels are hub centric and MUST have that machined lip for the wheel to index on.. Generic slide on spacers put too much load on the studs !!!
The S4 does not use spacers so the studs are long enough to mount the wheel and nothing else. Thus if you want to increase the track you need to either use a wheel with a lesser offset than the stock 52mm [?], fit new longer studs sized to accomodate the spacer required or use a spacer of the kind Sean advises in post 2.
Thanks for the replies.
I understand what you guys are saying regarding the need to be hub centric and the S4 studs being too short with spacers, but there are two things that are unclear to me:
Jim, you say that Sean's spacers "have new studs for the wheels", but Sean says that he doesn't need the bolts. Are you guys talking about two different things? When looking at the photo of the spacer in Sean's post, it appears that the spacers use seat bolts instead of lugs and lug nuts. Does this spacer setup replace the lug/lug nuts with seat bolts that will work on the 928?
Sean, you didn't need the bolts. Are you using them on your 88?
Overheard Stan at recent Frenzy: 1) Measure tire to inner fender gap on both sides 2) use the side where tire and inner fender have least amount of gap. 3) add 4mm to that gap # and use on both sides. Plenty of hub centric spacers here: http://www.ebay.com/sch/i.html?_from...acers&_sacat=0
Sean's spacers are for new Porsche cars which do not have studs on the hubs but use those bolts. O a 928 those spacers slide onto the existing studs on the hub and have 5 new studs which the wheel slides onto and is held on by lug nuts.
The Panasport 10 spokes that I put on the '88 (track car) are a great fit except for the fact that the 9" rears sit inside the fender lip about 3/4". I'd like to widen the stance by 1 1/2" or so by bringing the wheels out to the lips.
I know that there's a minimum exposed thread length that needs to be met when using spacers, and the thickness of the wheel interface comes into play. As a general rule, would stock lugs on an S4 be long enough to add 15-20mm spacers?
What 928 factory spacers are the most prevalent?
Any reason spacers would be a bad idea?
Here is the net net
you cant use a slip on spacer.. not enough room.. i fine tune with a 1/8" spacer, but that is about all you can safely do
buy the bolt on spacer.. its the only way to increasse track width in the rear.
It sounds like you need about 1" wider track width and that would be simply a 1" spacer that bolts to existing lugs and then it has its own studs you bolt the wheel too.
for longer studs, the stock ''84 had slip on spacers (hubcentric) and
they work great.. so did the GTS wich were even bigger. 17mm to over 24mm
bolt length stress is not a factor to worry about . the forces radially are on the hubcentric lip and the compression of the two discs via the studs.
you cant use a slip on spacer.. not enough room.. i fine tune with a 1/8" spacer, but that is about all you can safely do
Mark
You run with 11 inch rims if I remember correctly, not 9 inch and you run some wide rubber thus why your options are limited surely?
If the OP has 3/4 inch clearance with whatever rubber and offset combo he uses then he can pack it with whatever means are available to him the easiest being the bolt on spacer [not that I particularly like them] and as I am aware they start at 15mm wide I seem to remember.
I think I'm starting to understand my first lesson in "Introduction to Spacers 101" and I'm ready for my test
In a nutshell, the FAST spacers that Sean refers to as well as 928Motorsports spacers that Bertrand refers to are the same type: bolt-on hub-centrics that are installed/mounted by fitting the unthreaded spacer holes over the stock lugs and secured to the hub with lug nuts on the stock lugs (the provided seat bolts in the picture aren't used). When installed, the spacers provide their own lugs (compatible with lug nuts).
Did I pass?
10-06-2016, 01:39 PM
S4 rear wheel spacer question
