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alibaba alibaba is offline
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Join Date: Aug 2003
Posts: 35
Hi Jim,
Since now you would probably want 17" instead of 18", here's some further advice:

Installation de jantes 17" sur un v®¶hicule ®¶quip®¶ en 16" (Porsche 944)

** Note Porsche du 28 septembre 1993 **

PS: Afin d'®¶viter la d®¶formation de certains termes techniques pr®¶cis, la note est pr®¶sent®¶e telle quelle, en langue anglaise.

Number 9303, Model 4 Cylinder, Part Identifier 4412

Installing 17" Porsche wheels on vehicles previously equipped with 16" wheels.

Service Manager / Service Technician :
This bulletin replaces Technical Bulletin Group 4, Number 9303, dated 9-14-93.

Models Affected:
944 from 1987 with M3O option
944S from 1987 with M3O option
944 T from 1987 with M3O option
944 Turbo S 1988
944 Turbo 1989
944S2 from 1989

Installing 17" Porsche wheels on vehicles previously equipped with 16" wheels.

Installation Information:

A. Front and rear fender well lips must be reworked and/or checked for adequate tire clearance.

B. Suspension travel must also be checked. Parts such as brake lines, hoses and brackets must have adequate clearance.

C. New caster eccentrics, rear mounts and nuts must be installed in the front control arms. This change is necessary due to a change in caster specification on vehicles equipped with Porsche 17" wheels. The specification for vehicles equipped with 17" wheels is 3°„15'-45 (see Figure A.)

D. Vehicles must have a rear stabilizer bar.

E. When adjusting vehicles to new caster specification, all alignment values should be checked at that time.

F. When summer tires are used on vehicles with 17" Porsche wheels, snow chains cannot be used. If winter tires are used, only snow chains with Porsche Part Number 911 361 924 OO may be used.

G. Tire pressures for front and rear 17" Porsche wheels is to be set at 2.5 bar (36 PSI) at approximately 20°„C (68°„F).

H. When using this rim and tire combination, a 17 mm spacer plate must be installed on the rear wheel hub. The customer must be informed that if the emergency wheel is needed, the spacer must be removed.

I. Not for Cabriolet vehicles.
Old 09-26-2003, 09:49 AM
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