additional response to letters #31898 & 32083
#32424 from Grand Touring Committee · Rule change · TB 22-05 (2022-04 Fastrack)
In GT2 Spec Lines, Engines - PORSCHE, add to Notes as follows:
SOHC - 100 x 78.9: "2V only: May use Borg Warner EFR 76/70 42mm SIR @2280 lbs. Alt.4 valve head #944 104 013 03 NOTE: 4
valve head is not permitted to use with turbo allowance."
SOHC - 104 x 78.9: "2V only: May use Borg Warner EFR 76/70 42mm SIR @2330 lbs."
SOHC - 95.0 x 70.4: "2V only: May use Borg Warner EFR 76/70 42mm SIR @2405 lbs."
In GT2 Spec Lines, Engines - PORSCHE, change as follows:
Bore x Stroke: “95.0 x 70.4 104.0 x 88.0”
Weight: “1950 2090”