[kenikh]

Inline.

Originally Posted by John I

Hello everyone. I would like to ask a few questions about a turbo engine build I have in mind.
I plan on building a twin turbo EFI Intercooled engine. This for my 79 930 with a G50 trans.
Right now the car has a 1995 3.6 993 engine.
I want to build an engine like I mentioned above. I already have the turbo set up, 3.2 intake, and Electromotive Tec 2.

(Questions)
Can I start with a 1978 SC engine long block? Yes
I know it is an aluminum block.
I plan on using ARP head studs, or whatever is ideal.

Can I put a 3.2 crank and rods in this case? Yes
I am looking for the extra stroke.
Are SC and Carrera rods the same? No

Can I machine the SC case for 100mm cylinders? Yes
I am a machinist and should be doing this.
But I want to ask before buying an SC engine to start with.

Are that Year SCs heads ok to use for this engine? Yes, but the alloy is different so the theoretical heat limit is a bit lower on SC heads than turbo heads. In practice, not a huge deal. Turbo heads also have sodium filled valves, SC do not. Again, in practice, not a huge deal
Valve size large enough? Yes
I know I will have to machine them for the 100mm cylinders.

I want to build a 3.5 liter engine with good power, 400 plus HP
I know I am probably better off starting with a 3.2 Carrera engine, but I think I
Found an SC engine to start with.

I have now a 1977 3 liter 930 engine with SC cams.

If I am going to do this, I need to build an engine bigger than this 3 liter.
Here are a few pictures of the set up.

Thanks everyone for your help.

The question I keep asking: Why not buy lower compression pistons for the 3.6 and turbo that? This configuration will meet ALL of your design criteria, with less hassle, less complexity and less expense.