Mon Jul 08, 2013 3:56 pm by Admin

For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Rear wheel question.

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Rear wheel question.

Post  fliermike45 on Thu Feb 11, 2010 11:02 pm

Will 9 inch Porsche Cup 1 rear wheels fit a 88 NA 944 without body modification?


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Re: Rear wheel question.

Post  jimbo93 on Thu Feb 11, 2010 11:08 pm

they should but if the tire is to wide you might have to roll your fenders


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Re: Rear wheel question.

Post  Admin on Fri Feb 12, 2010 9:05 am

My present wheels are 9's in the back and have a slight rub under hard acceleration. Just needed the lip rolled.


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Post  gamman on Fri Feb 12, 2010 11:59 am

My research shows they should fit in the front with the right offset.

From Rennlist:
did a ton of research on this, the answer is yes,
[quote from lemming]
Just snapped this crappy photo, wheels are 17x9's late offset with 25mm spacers (early a-arms). Tires are 275/40-17's with camber at -3.5.
track car has 255's on 9" twists on all four corners. no issues. ET55
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18x10 on 285's
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On your turbo S you can run up to a 305 section width using the correct tires and some massaging. I've seen a 315 on the back of a stock bodied 951 at the track, but I'm fairly certain his car was VERY stiff. Needless to say he had custom wheels with the perfect offset.
I used to run 255/40-17s on the front and 275/40-17s on the rear of my car at the track. I had NO rubbing issues, and the gearing difference really didn't bother me. In order to do this correctly you need at least 8.5 and 10 inch rims.
Performance wise I really think the best set up right now is a 285/30-18 on the rear and a 265/35-18 up front.

SUB Question:
why would the turbo swallow larger wheels than an NA, apart from offset, is there anything else (IE: Body) that would preclude the tire choices?

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Re: Rear wheel question.

Post  matthewb on Mon Feb 15, 2010 8:19 pm

There should be no reason for the turbo to take larger wheels. The bodys are the same at that point and the suspension geometry is too. People may make camber adjustments that could affect the fitment.


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Post  gamman on Tue Feb 16, 2010 4:16 pm

Found great info, in a well read/reviewed by racers summary post:

18x10s will fit in the front with a 285 without issue. There was no magic here, just measured offsets and camber plates on a stock fendered '87.

If you're going racing, as I have, I really don't think you can go with too much tire providing you keep the wheels light and keep them tucked in so you aren't creating a whole bunch of unnecessary drag. Also a square setup doesn't mean the car is going to explode! Run what makes sense for what you're doing. You don't need stagger if don't have the power to justify the big rears, as for making the argument that you don't need the big fronts if your car already turns in nicely - I'd say you're not driving through the corner hard enough!

If you're just building a street car then do whatever you want! Stretch, poke, zero offset, whatever trend makes you happy. Also keep in mind tire sizes are subjective, so one 285 might fit, but another might not. You need objective numbers like overall diameter and section width. Again, this isn't tricky, all the info is readily available.

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TonyG, and a bunch of other posts on site as well.

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