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Think these will fit a 931 ?
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Fifty50Plus  



Joined: 28 Feb 2008
Posts: 1354
Location: Washington DC area
PostPosted: Fri Apr 12, 2019 1:17 am    Post subject: Reply with quote
Cedric,
Agreed, I have neg 3.5 on the fronts (seven Cookies) and they fit under the fender lip with no touching and neg .5 on the rears. Raced last weekend and the car was about 1/2 second faster than last fall on the same track.
_________________
1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
PostPosted: Fri Apr 12, 2019 2:51 am    Post subject: Reply with quote
Cédric wrote:
Fifty50Plus wrote:
I've been running the 6 inch Cookie Cutters on my race car and they worked fine. Recently the rules allowed me to go to a 7 inch rim. I got a set of 7 inch Cookies and mounted the same tire (Hoosier 205-50-15) on the sevens. The front goes all the way out to the fender well since the extra inch on the seven inch Cookie is to the outside. As for the rears, I had to take the factory spacer out to mount the sevens. Then I found out that the wheel studs were not threaded all the way down. I was able to get a 5 mm spacer for the rear for the wheel nuts to fully seat. The rear tires fit nicely in the wheel well while filling it.
I guess the best looking solution would be 6 inch Cookies on the front and 7 inch on the rear but I really like that extra front track for cornering.


Strange, my studs at the rear are threaded all the way in, ive been running cookie sevens all around for years. Up front is fine on a track oriented car, since you should run maxed out negative camber that will tilt in the wheel significantly. Agree that for a full street car the 6s would fit better. They are light and durable. But if you look at the jap wheels above i think cookies are out of the scope


Get the rear arches rolled and you can refit the 20mm spacer with 15 or 16x7 ET23 rims and 195 50 track tyres. Square front and rear set up best for track grip and balance.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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