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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Found some more:

"The Group B 930 suffered a severe weight handicap because the displacement of it's 3.3 liter turbo charged engine had to multiplied by 1.4 (40% increase) which put the car in the 5 litter category (1,235 kg minimum weight). It's slightly modified engine (strictly regulated by Group B specifications) produced a little over 360 HPs that were put on the terra perma using 9.5 inch front wheels and 11 inch back wheels. Regulations would not allow wheels to protrude beyond the standard fenders. Although the car was starved for traction, driver Paul Smith commented on how much fun the 930 was to drive because the tail could be hung out at an "impossible angle". Engine modifications were few. A larger intercooler, longer duration cam (cam height changes were not permitted), and increased boost (standard - 0.8 BAR; Group B - 1.0 to 1.4 BAR) were the only changes made to the 930 engine.

Suspension modification were allowed as long the the original suspension mount points where not altered. Solid mount points and strut tower braces were permitted. Coil over springs were not permitted, but torsion bars size was not regulated. Porsche used 22mm torsion bars in the front and 28 mm torsion bars in the rear. The anti-sway bars were of standard 911 design (solid-through chassis) and were 22mm in front and 18 mm in the rear.

Wheels were 9.5X16 in front and 11X16 in the rear with Dunlop tires (245/575-16 and 300/625-16). The oil cooler was mounted in the front with the reservoir mounted in the front boot. The cars were stripped with full roll cages.

Unfortunately by 1984, it was obvious that there was little popularity for anything other than Group C racing and FIA decided to drop the category at the end of the 1984 season. With no place left to race other than IMSA, where the 934 still dominated, the 930 was retired to historic and club racing."
Old 03-12-2010, 09:30 AM
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