Last Sunday I bought a 1987 930 that had been sidelined by a broken head stud. The PO started the project and did a lot of great work, but has now passed the torch to me. This will be a beautiful puzzle

I started out last night by measuring the cylinders for bore spec, roundness and taper...all is well!

 

Measuring rod/crank clearances now

 

Anybody know if I have room for fire rings in these cylinders & heads?
8-8.5mm for head width
2.5-3mm for cylinder height

 

congrats on the purchase. hope the rebuild goes well. good luck! keep the pictures coming.

 

Will do!

I've got more pics right now but not smart enough to get them to upload from my iPhone

 

conrod & main bearings

 

bearings, case & stand

 

rod brg clears are good, turbo pump is clean and rockers need resurfacing

 

turbo pump cleaned & almost ready to use

 

I'll follow along. Would love to do one of these myself but don't think I'm **** enough to make sure all measurements and clearances are within spec. My motor was build with EFI in mind (Motronic), but just seems sooooo expensive.

 

Nothing worth having is cheap

 

more pics

 

more progress

 

you're not going with 3.4's ?. As it was explained to me, main reason why Ruf went to 3.4's is that the cylinders had fins all around which was better for cooling. If stock ones are perfect I guess it is a good money saver.

 

If these Mahle's weren't so bullet proof, I'd be upgrading to 3.4s after their 24 year 120,000 mile life, but they are absolutely metallurgy masterpieces