blade7

Hi, If buying a 3.0 crank on it's own is there an easy way to confirm it is from a S2/968 and not a 2.5 item ?. Thanks.

Darwantae951

Probably by part number.

You can see it in this photo, on the front most counterweight:

blade7

Hi, blown the pic up but cant read the number, what is it ?.

fortysixandtwo

2.5 Crank: 944 102 015 13
3.0 Crank: 944 102 015 15 or 944 102 901 CX

Source http://www.porsche.com/usa/accessori...artscatalogue/

Chris White

Measure the throw? Or was that too obvious!?

Thom

If you can tell a 9mm difference in stroke when looking at pictures of 944 cranks, then hat's off to you!

JohnKoaWood

4.5mm off centerline... difficult but not impossible...

fortysixandtwo

I was going to list the stroke as well, but wasn't 100% sure I had the numbers correct.

Per the factory work shop manual:
2.5 Crank: 78.9mm stroke (39.45mm throw from crank center line)
3.0 Crank: 88mm stroke (44mm throw from crank center line)

Duke

It's not "one" 3.0 crankshaft. The S2 and 968 are different with different part numbers. (015 11 for S2, 015 15 for 968)

Peedster

Are there any differences between the two 3.0 cranks?
And is there anyone to prefer in comparison?

Thom

The 968 crankshaft is ~2.5 kg lighter than the S2's.

Peedster

Ok, any weights on the 2,5?

Thom

Slightly less than a dead horse.

Chris White

Actually its not too hard to tell the difference in pictures if the pictures are from the right angle.
The place to look is the ‘overlap’ between the main journal and the rod journal – on a 3.0 crank there is very little overlap.

1st pic is a 3.0 and the 2nd is a 2.5 – look at the rod to main journal relationship……once you see it you can tell them apart at 20’

Another trade secret from 944 Enhancement!

blade7

Thanks for the replies, I passed on the crank I was considering and decided not to go 3.0 yet.