Type 4 in P 996
 

I've been wanting a 912 but they've gotten pricey. And considering all the 996 engine problems, what would be the downside/issues with a Type 4 engine transplant into a 996 ?
Lower power for sure but that is part of the 912 charm.

Over all. the weight difference between the 912 and the 996 will hurt your performance, fuel MPG, and getting everything to function with the Dash will be a lot of work. would be a simple engine, Have you considered a 997 engine?

I would avoid the type-4 engine like the plague. It is an insanely expensive engine to build, almost as expensive as complete air-cooled flat-6. To get the type-4 reliably even up to 150 hp, you're going to spend about $15,000 in parts alone. Then add machine work, cost of adaptor plate, ...

You can build and M96/M97 much cheaper than a type-4, and the M96 is a great engine. If the M96 cost is still too much, you can swap in a Subaru turbo, or even look into something like a VW R32 engine. The nice thing with the R32 is it's the same bell housing bolt pattern, so should bolt up.

I've got a 76 912, that after some serious research into all the engineering options, I've decided on a 'stealth' Subaru flat-4 swap, with hidden radiators. I'm going with a built N/W subaru in mine for a variety of reasons, but mostly that it's light, simple, lower cooling requirements than a turbo, and I think just looks good.

Here's the look I'm going for.
http://forums.pelicanparts.com/uploa...1582043429.jpg