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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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The 2.7's cams run on three bearings. 964's use four bearings. This means using a newer cam tower or getting a three bearing cam reground.
Higher compression pistons, say JE's 9.5:1 and improved exhaust, SSI's or backdate to '74 and you should see 25 to 40 HP increase.
Since the '74's thru '77's are lighter cars, as much as 150 pounds, performance will approach that of a 3.0 SC.
Another upgrade is switching out the ring and pinion from 8:31 to the earlier 7:31. You'll get better accelleration at the expense of MPG.
You can always get more power from carbs and a hotter cam, but smog issues begin to rear their ugly heads.
Carbs can be an issue in the cold Wisconsin winters. They sure are here in New Mexico.
Bottom line, you can hot rod the 2.7 up to a point, beyond that go for the bigger cubes.
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DOUG
'76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's.
'85 911 Carrera, stock, just painted, Orient Red
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