ehall

my vote is for Chris White. there is no question whatsoever that he will do a thorough, professional and honest job for you. He also owns, drives and races 944/951's and is a site sponsor. He's a no bull**** kind of guy.
...or you can go with a company that may or may not be willing to support you all the way.
Easy decision, but good luck either way.

Chris White

Good to know, I thought the whole operation was closing.

Chris White

This is where it gets interesting!
The three liter block is externally exactly the same as the 2.5 except for the cooling passage connection to the head. You can mix and match turbo and 3.0 parts.
The water pump is a different part for the 3.0 because the belt drive is wider. A 2.5 pump will bolt on.
The block has the same mounting points for the arms going down to the engine mounts.
The crank has the same bolt pattern for the flywheel.
Transmission- an S2 trans will not appreciate the full power of a 3.0 turbo!

Many other parts are interchangeable – oil pan, balance shafts, A/C & Alt brackets, PS brackets, Air/Oil separator, heat shields, bell housing – just about all external bolt on parts.

Chris White

Thom

Chris White,
Can the wider S2/968 timing belt be used on a 3.0 block with 2.7 head ? Is it the same length as the stock 2.5 turbo timing belt ?

Chris White

You would have to swap some other parts from the belt drive (crank sprocket, cam gear, and idlers/tensioner. You can update/backdate the drives as long as you use all the parts specific to the belt width. The belts are the same length.

Chris

Thom

I suppose that the wider S2/968 cam gear fits into the 2.5 cam gear housing, then ?
Thanks.

jturbo

Thanks Chris,

The 968 turbo S used the 3.0L block, a 2.7L head to match the coolant passages, the 3.0L Crank, 968 turbo S pistons. I'm not sure what rods they used though?

Your 3.0L Senerio #2, which is identical to the above mentioned setup, sounds like it would be the best bet (most reliable, least fabrication, etc.) considering this is the way the factory went.

I am just curious at this point if the remaining 2.5L and associated 944 turbo components will bolt on to the engine?

Also,

How would you prep the 3.0L block? And what would this setup cost for you to create and assemble this small block setup?

Chris White

All the accessories will bolt on. I would go with the old 2.5 style belt because it would be easier to put together. I am not sure if the wider belt will fit inside the 2.5 style cam gear housing.

If we go the sleeved route the cost of the Darton sleeves, JE pistons and rings is $2850 for the parts and machining. For assembly I normally charge $750 for labor and parts at cost - (bearings, seals & gaskets and any other additional steps – magnafluxing, balancing, powdercoating). Basically your are in the $4 to $5k range based on you supplying the block, rods and crank.

Chris White

Diver944

This is the route I took when my turbocharger disintegrated and scored my original 2.5 block. I bought a complete 2.7 engine (the block is the same as a 3 litre) and a 3 litre crank. The block was machined by Perfect Bore here in the UK to accept Nikasil lined steel sleeves that bring the capacity up to 3.2 litre. Custom JE pistons and Carillo rods complete the short block.

The 2.7 head has been machined, skimmed and ported and will use a new set of sodium filled valves. There is no head gasket as such but four copper crush rings will seal the combustion chambers and a modified cometic gasket will seal the waterways. It's been a long project (starting last July) but the engine is now complete and shortly to go back in the car

Duke

Paul, that sounds like a very interesting project!
Please post more pics!

Tom M'Guinn

As I understand it, the 968 turbos built by Porsche used a unique head rather than the actual 89 2.7 head. The 2.7 head is the popular choice for the rest of us though.

Few other random comments: Carrillo sells rods directly, but they charge a lot. I bought mine from Andial -- had them on the shelf. I imagine they still stock them. I talked to the EBS guys last month at a swap meet -- they sell JE pistons for this purpose, but only for blocks that have been Nikasil coated at a place like US Chrome. Andial may also still have a few sets of 104.5 turbo pistons from Mahle.

Ski

Chris had just started doing the 2.7 series after jwl did his 2.8L a few years ago or I'm sure he would have given it a good look. Here is the clearance that you get with Carillo rods so you can see where stock rods and the rod bolts would cause issues with the girdle and the front of the oil pan.

jean_noir

bump 4 later

ehall

jean,
If you go to the top of the screen, you will find a tab that says "thread tools". Click that and you can subscribe to any thread without posting in it. Responses will pop up in your email if you select that option in your user cp.

Synth

They are still around, I found them at the website area951.com