Quote:
Originally posted by 911Switzerland
Now I d'ont know which Mahle cylinders i have to use. Can anybody help me with a Mahle Serial No. or Andial No.? Want to go 10.3:1 - 10.7:1 CR. Where can i buy? Prices?
|
Thomas,
3.6L conversions from 3.0/3.2 motors have been done since the 964 was introduced in 1989. Andial was the first to develop this conversion.
Andial sells a kit that includes the 76.4mm 964 crank, modified 100mm Mahle pistons and cylinders, and a special crank pulley.
Arnold (co-owner of Andial) ran the mule motor in his own '77 911 for a long time. The motor was based on a 3.0L SC and retained the CIS and single ignition. Other then additional oil cooling that was needed for the increased displacement, the motor ran without a hitch. I don't remember exactly, but I think the motor had 9.2:1 or thereabouts on single plug.
Many, many motors were built (normally aspirated and 930 versions) using any combination of CIS or Motronic, single or twin-plugs. At the time, this was the max displacement update for SC and Carrera owners.
The 100mm Mahle pistons and cylinders are the same ones used for the 3.2L to 3.5L conversion using the 23mm wrist pin. The pistons are then machined to work with the 3.6L crank. If you buy the kit from Andial, the pistons will already be machined by them or Ollie's Porsche Machining. If you source the 100mm P's and C's from others, I have the drawings for the machine work that is necessary if you need it.
I also have the Mahle internal piston and cylinder part numbers, but unless you can buy from them direct I don't think that they will do you any good.
Sounds like a fun project, keep us updated as things progress.
Ralph