Yep it sure did, and it was a prototype 16v DOHC 2.5L turbocharged version of the 944. Raced in 1981 at LeMans.

I would hold out for the later 81-82 year variants as well. Those 2.0L engines are tough but I would speculate that with the iron block and Aluminum head that a steel head gasket would be ideal. That is what the MKIII Supra boys have to do. Also the clyinder spacing is minute in between bores. The 931's used a 911 Turbo wastegate so those parts can get prciey, and the turbo uses a internal pop-off valve. Fun cars my friend has two 81's, one of which is going under some serious mods.

 

This one?

 

Yep that be the one
Here are some pics with the massive intercooler incorporated.

 

I should take pics of my 931 engine. Oh, I have taken pics of it, just not when I installed it in the engine compartment :
It sure has bigger huffer than the mighty gtr The amount of power remains to be seen (after completion of stand-alone ems)
Actually modifying the 2.0 is very cheap if you know what to do and stock crank+rods (not to talk about the block, it's made for a tank I presume) are very strong.

 

My 82 924 went over 300k before finally spinning a rod bearing. (sold it to a friend just before this happened). When we rebuilt the motor, the cylinder bores showed no wear. I mean absolutely no wear. The pistons had so little wear that I still dont think the machine shop believes us when we told him it had 300k+ on it. All he had to do is very lightly kiss the cylinders with a hone to break the glaze.

That was about 5 years ago. My friend just recently sold the car and has but put another 100k+ on it while in his possesion. I had converted it to side draft webers when I owned it and it still has that setup.