Hi Dan

I totally agree with both you and Erkka.... they AINT going to fit...end of story...

The OP said to fit STANDARD S4 WITH NO MODIFICATIONS....

Not race cars with fancy suspension..standard S4...no way is the answer to the OP.....

All the best Brett

 

Erkka calculated (and few agreed with him) it can't be done and Mark (+some others) have done it. I'm sorry, but I'm too confused to know who really is to believe....

Maybe I have to get under the car one more time and see it by myself. I do believe my own eyes, usually.

I can put additional stop plates into my steering rack, no problem. I can change the front sway bar, no problem. But right now I cannot have 2.25" or 2.5" springs if they are needed?

Since I have found a pair of those hollow spoke wheels I need to know this now for sure. I put my order into halt before I'm sure they will fit.

So, have a nice day / evening / night everyone. It's almost 6am, so I will go to bed now to wake up at 1pm.

 

Wow. What is so difficult to understand?

There are people on here running this setup, it works.

Or, I should say it works on THEIR cars.

For you naysayers, perhaps this setup does not work on YOUR car.

So, let me clarify my fitment, '88 S4, COMPLETELY STOCK, ride height at lower limits of factory specs (don't have the numbers handy now).

At full lock, I get some rubbing.

Like Hacker, I could care less about that. The only time I am at full lock is parking lot speeds and I've always backed off of full lock in all of my cars anyway so I don't stress the power steering components.

For the naysayers, please stop making blanket statements that are not correct, its not helping anyone.

 

yep, it does work and Ive done it a bunch of times. FACT: Scot Graham's car has the 9.5" front rims, 8" backspacing and has no problem and its stock suspension stuff. the only thing I would do with 10" rims with 8.5" backspacing is the double spacer on the steering rack, that Anderson did when we were building up my chassis. NICE! no more rubbing on the wheel . both with 10 and 9.5" rims that I have.

 

Either there is something wrong in my calculations or 10" ET64 (or is it 65?, doesn't make much difference) people have created new physics where stock front fender extends much further out than in my garage. Marks 10" ET89 is totally different animal as there is no question about fender rubbing at all. Its all inside and how far shock and spring is in stock wheel setup. Anyone can simulate both of these options simply by adding something like cardboard to existing wheel and rubber to see how far in and out wider setups would go.

When 8" ET50 is really close to unrolled fender with 225 and 235 rubber its very hard for me to believe 8" ET39 equavalent 10" ET64 wouldn't be step too far. My math must be wrong but I can't figure out how. Usually numbers don't lie when they are applied correctly. Any pics of these turbo twists when they are straight which would show how far out they come? Pic taken along fender line and not from side.

So at least full lock is problem. That sort of says my math can't be totally wrong. Next question is, is extra stop to racks end enough to take care of it or is even more restriction needed?

 

I belive that if you run an ET 65 on standard height and camber it might work or might not, the best choice of tyre will be a 255 35

If you have smaller springs, lower ride height and more - camber there is no problem other than the need to fit a 2nd set of spacer rings onto your steering rack and 265 35 tyre can be used.

I have run an ET 50 and the 65 , the 65 10" fits better on my car with less rubbing as the tyres used are not as tall, check specs for yoko toyo or any other firm to see

 

It was an '86. Yes, this is a discussion group, but when some new guy asks if some wheels will fit and someone says "of course", you better be damn sure they really will fit his car. The OP was asking exactly this, and it seemed like a pretty stock car to me. The linked picture is useless in determining whether the front fender of the car is ruined during a very large suspension compression event. The picture should be with the wheels straight and the picture taken directly over the top of the front fender. Again, if the non-stock suspension is such that so much compression travel is not possible, then that's fine. I know for a fact that a stock suspension 928 can compress the suspension enough that if the tire is extending past the fender, it will hit it.

One front fender on my '86 was messed up by 235/40-18 tires on 8.5"x18 ET52 wheels in the past. 10" ET 65 wheel sticks out past the front fender further than those wheels. Maybe the people recommending this configuration 1) do not drive their 928's hard enough and/or 2) they have suspensions whose full range of travel is much smaller.

Dan
'91 928GT S/C 475hp/460lb.ft

 

I dont think that ET65 is the right answer, as I have only been saying something that absolutely DOES work. you go and do the math, but backspacing of 8.5" on a 10" rim will and does work on ALL 928s. even if the ride hight is near stock (actually better due to bump steer angle movement), the tires will not rub on compression , even full compression of the suspension as shown by the picture i posted of scots car. I know the offset is near 85mm for the 9.5" rim given a 8" backspacing. how that changes for a 10" rim all let you do the calculation, but its not 65mm.

here are pics of the bone stock 928 set up with 275s up front on 10" rims and 8.5" backspacing. they fit exactly the same as 275s with 9.5" rims and 8" backspacing. it tucks into the fender nicely, as it compresses, there is no fender touch at all. PERFECT. Ive been telling this story for 10 years now, yet NO ONE seems to believe me and wants to constantly reinvent the wheel here.

just buy a 10" rim with a 8.5" backspace and it will be perfect. 9.5 with 8" backspace if you dont want to worry as much about full lock rub. add an additional steering rack spacer and you will be fine.

 

BTW, Mark how much more clearance could be achieved by pulling the front fenders from the bottom-rear area like you have done for your new black car? EDIT: and also did to Holbert car I see....

 

that when you get 1-1.5" more clearance which is enough to fit the 315s up front on the 10" rims with 8.5" backspacing. there is not even a rub on the inside of the fender, and my ride height is near 110mm.

the picture below is my 10" rims with 8" backspacing. *(usually only used for my 275s) but if you notice, I have 2" outers on the rims. this is eactly how the 315s fit on the outside of the fender/tire. in fact, even with this set up, i use a 1/8 spacer and still have a lot of room. about .5" more room if I want it, leading me to believe I can run the 315s up front on these rims (10") with 8" backspacing.

 

Stating the obvious, but of course, the optimum thing is to do the test fit before the purchase, if at all possible.

 

MK

My 65's are just a stop gap , i will be getting 10"s with the 8.5 back spacing either Fiske or CCW

That car of yours look real mean

 

thanks. Its truely amazing when you think about what ive done to this car. just gut and go car! (and bolt on the cage, suspension, wheels, and headers with optional 1.5 second faster stroker engine ) everything else totally stock.



[QUOTE=NeverLateInMyNineTwoEight;7828631]Stating the obvious, but of course, the optimum thing is to do the test fit before the purchase, if at all possible.[/QUOTE

No, just get a friggen ruler and see if you have 8.5" backspacing on a 10" rim. if you dont, good luck!! if you do, it WILL work. Ive done it on a 79, 82, 84, 86 and an 87 and thats with 275 tires, 255s are a no brainer! why dont you guys ever believe me???????

 

I believe you, I believe you.

I HAVE 10s mounted on the front of my S4, so believe me, I believe you.

I was just trying to be charitable as some here have their doubts, and it would be a shame if someone invested in new wheels, only to find they do not fit for whatever reason.

No harm in a test fit with the real thing.

 

ha ha ha! I know you know that we know that it works.

It just cracks me up all the pain everyone goes through for years about some of these topics while some of us have already made the mistakes and fixed them to determine what does work. The reason I knew this would work, is devek made me two sets of rims. the first was the 8" backspacing, and the second was the 8.5" backspacing . they were supposed to be the same, but they were not. they still fit, but i needed to put spacers on them to make them stick out the same for both sets. (same total track width.) then, I sold them and got the right ones. later, after the accidents, I ended up being able to get larger inners. ( more backspacing by .5") and recently with the Holbert car total, also was able to do something with the 9.5" and turn them in to 10s by using the larger outer. (so, 10s with 8" backspacing). so, I know what works and what doesnt.

anyway, have fun!!