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Carrera3.5L Carrera3.5L is offline
Doesn't want/need a 3.6L
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Join Date: May 2004
Posts: 1,635
Re: 3.6 rebuild. No, not the 964/993 3.6

Originally posted by Shuie
anyone ever built a 3.6 using a 76mm 964 or 993 crank, rods, & JEs on 3.2 case with with 100mm cylinders (the 3.5 cylinders) with the type 930 stud spacing)? The 3.2 heads are good to 300hp, right? Seems like it could work. Or am I totally misinformed or off base in thinking that a 964/993 crank can work in a 3.2 case?

I know it wouldnt be cheap, but Im thinking about the possibilities. I saw a 964 crank with rods for sale recently that made me think of this. Its nothing more than curiousity, Im not thinking of doing it or anything. Yet

Nope, not off base at all. Been done many, many times in the past on 3.0L/3.2L cases before 3.6L conversions were both affordable and figured out.

You will need to modify the Mahle 3.5L 100mm pistons though to work with the 3.6L 964 crank and 3.2L rods (you don't need the 964 rods for this conversion). I do have the piston mod drawing if you end up doing it. I'm sure JE can make some pistons to work as well. Case spigot bores need to be enlarged to 105mm from 103mm as well.

A 102mm p/c combo for a 3.7L will need the case to be enlarged ANOTHER 2mm to 107mm. Not really sure how durable that is in the long run. Andial uses Carillo rods with that conversion and they use Mahle pistons/cylinders with a 3.2L crank!

IrocMan does have a valid point. Unless you get the 100mm pistons/cylinders and 964 crank for REAL cheap, it isn't a cost effective conversion compared to a 3.6L transplant, both in price and in power and probably durability as well. Remember, add in the extra cost of twin-plugging with the 100mm bore. No knock sensors.


P.S. - Hey IrocMan, do you have an english version of your site so I can read about your projects?
1988 Carrera w/ 3.5L Twin-Plug

2008 Cayman S (coming soon)
Old 04-27-2005, 10:01 PM
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