924Board.org

shoestring39 · Joined: 23 Feb 2010 Posts: 3 Location: Long Island NY

Before I shoot myself for purchasing tires to wide, has anyone squeezed these on a 924S. This car is being setup for autocross, 1.5 camber in front. 1" lower. The usual other stuff springs, sways,

My concern is up front. Will the tire run without rubbing on the outside fender or spring on the inside? I run 205's right now but have seen some of the spec cars running the 225's

I want to purchase the Nitto's

Any thoughts
Thanks
JT
88 924s new project
73 911 was the old autocross rocket

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

I have 205/50-16s on the front of my 931, and can barely get my first knuckle between the tire and the spring.

However, this is easily rectified with an inexpensive coilover sleeve kit.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

shoestring39 · Joined: 23 Feb 2010 Posts: 3 Location: Long Island NY

What tire do you run on the back?

emoore924 · Joined: 13 Apr 2004 Posts: 2822

I've run 225/50/15's front and rear for years on 15x6 cookies and never had a problem. Rolled fenders, lowered, all that. Its is close but I think the 45's would probably fit.

Paul · Posted: Sun Mar 21, 2010 5:31 am Post subject: Re: 225 45 15 "R" tires on 924S

924RACR · Posted: Sun Mar 21, 2010 9:54 pm Post subject:

We've been running 225/45's on the ITB car for years, with a coilover front conversion.
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Paul · Posted: Mon Mar 22, 2010 12:33 am Post subject:

Any recommendations for a 924S with a stock suspension and stock 15" phone dials?
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

bcblase · Joined: 23 Oct 2007 Posts: 574 Location: Winchester, VA

I run 225/50-16s all around on some old 928 rims. The backs are 16x8 and the fronts are 16x7. I need to install 5 mm spacers in the fronts because of the offset.

You really need at least a 6.5 or 7.0 inch wide rim to run 225's.

Brad
_________________
1987 Porsche 924S - track toy
1986 Mercedes 190E 2.3-16v - autocross
2007 F-150 5.4L Lariat Supercrew - tow beast
1994 Volvo 850 Race Wagon - 24 Hours of Lemons Car
2001 BMW 325xi - daily driver

Cedric · Joined: 27 Aug 2004 Posts: 2809 Location: Sweden

I would recommend 8s for 225 and 7 for 205. At least if you have R-compound. or else the sidewalls will have a hard time, if you drive at high pace. Whats the ET on the stock rims for the S, the biggest problem for me is the spring/springseat. When camber is about -3 degrees its only the ET 23 7" wide wheels that has lots of space, stock 6" with 195 street tyres are almost touching the spring, maybe a finger between.
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1980 924 Turbo
www.instagram.com/garagecedric/

924RACR · Posted: Sat Apr 10, 2010 9:15 pm Post subject:

Paul · Posted: Sat Apr 10, 2010 10:06 pm Post subject:

Just picked up a set of 16x6 trashcans so now I'm looking for 16" R compound recommendations.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

bcblase · Joined: 23 Oct 2007 Posts: 574 Location: Winchester, VA

Hoosier R6s if you have the money and can afford to replace them every season or more. I run the A6s on my autocross car - there's nothing like them.

I have heard the new Nittos are very similar (same compound) to the Toyo R-888s.

Michelin Pilot Sport Cups if you can afford them, but they will last a long time and are DOT legal, but not much tread in the rain.

I run Dunlop Direzza ZR-1s, but they are not quite R-comp. But they are cheap, DOT legal, and last for quite a while. Plus, they are amazing in the rain.
_________________
1987 Porsche 924S - track toy
1986 Mercedes 190E 2.3-16v - autocross
2007 F-150 5.4L Lariat Supercrew - tow beast
1994 Volvo 850 Race Wagon - 24 Hours of Lemons Car
2001 BMW 325xi - daily driver

genikz88 · Joined: 29 Mar 2006 Posts: 64

225s fit fine on a 7 inch rim, but 6 would be a stretch (pun intended).

Here are 225/50/15 RA1s on my 924S. Note: I run -2.0 negative camber in the rear. Front fenders are rolled and I run about -2.5* camber in the front using camber plates. No rubbing whatsoever.

_________________
Chris
'88 924S

genikz88 · Joined: 29 Mar 2006 Posts: 64

924RACR · Posted: Fri Dec 17, 2010 10:49 pm Post subject:

Chris: you didn't get that car from Michigan, did you? There was one similarly-painted here a few years back...

Also - dude, you need more camber. It's faster. More track would help too...
_________________
Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype