2.7 with a 3.0 crank

[88 Club Sport]

A friend of mine is considering a motor purchase. Its a 2.7 that seems to be rebuilt right (shuffle pinned, oil squirters, new pistons and cylinders etc) but the seller says it has a 3.0 crank.

My questions is regarding the crank....what does a 3.0 crank offer in terms of performance or reliability over a 2.7 crank.

Thanks

[Flat6pac]

The cranks are completely different and not usable in opposite applications.
the 76/77 3.0 Carrera used a 2.7 crank and rods with 6 flywheel bolts
the 78 and later used a 9 bolt flywheel although the stroke is the same the rods are not identical, as they use different bearing shells
Bruce

[88 Club Sport]

Thanks Bruce. It will be in the shop next week so we'll figure out what the motor is at that time.

[88 Club Sport]

Bruce, TRE told us that it was a 2.7 with a 3.0 from a 76/77 turbo......seems that they have the same bolt pattern.

[Flat6pac]

I own a 76 930 and indeed it does have a 2.7 crank. All 74 to 77, Carrera, Carrera Turbo, and 2.7 S used the 70.6mm stroke crank and it was in fact a 2.7 crank.
The 78 and later 3.0 used 70.6mm stroke but different rods and bearing sizes but stroke remained the same.
What ever the crank orgin, its a 2.7 and was used in the 3.0 /carrera 3.0 and Carrera Turbo 76 and 77 only

Bruce

[356RS]

70.4 stroke