Lots to learn on my 911sc

turnofftheradio · 10-28-2025, 05:43 PM

2 years ago I bought my 79 from my good friend. We are still friends 😆 I've known this car since he bought it and helped with pulling the engine under his ownership. His goals were stripped out track car. Mine are not. What I have to start with is a 3.0 with an odd kkk turbo, headers and bitz efi. It leaks like a sieve, has an incomplete tune, and was missing a trans mount bolt, but did drive home with me. I have sat on it for a year trying to learn as much as I can from the forums and Wayne's book before diving in head first. I'm no stranger to mechanics, but new to porsche. Ive pulled the cams and should have it all apart soon. I seem to only be able to post in this specific forum, so forgive me as it probably belongs in the engine rebuild topic, but it does have a turbo.
Here's the pics, first post for me.

motorracer · motorracer's Garage

Welcome looks like you have quite the project good luck any questions the people here are always helpful Karl

turnofftheradio · 10-29-2025, 08:11 AM

Quote:

Originally Posted by motorracer

Welcome looks like you have quite the project good luck any questions the people here are always helpful Karl

Thanks Karl! I've got my work cut out for me here!

I'm lucky that here in Michigan I've got a lot of resources somewhat local to me too. My rough plan is still not decided... I'm just not sure I want to keep it turbo. It wasn't provided with any supporting internals. I'd like to have it all torn down before I make my mind up on that. It's at least going to need a few or all exhaust studs, likely valve guides, probably head studs and surely rod bolts, and a big rewire of the engine compartment just to get going safely.
If I continue with the turbo, its going to need more and or never see significant boost without some more major changes. So, keeping the turbo will cost money and removing the turbo will cost money.

turnofftheradio · 10-29-2025, 06:17 PM

Got my right side cam towers and heads off. Intake studs came with the nuts on some, and there as an extra washer in there 😆 idk what the hard glue like stuff is that was sealing the cam towers to the heads. I think it's actually melted plastic bag from a mouse nest!

That scoring doesn't make me happy, but I'm saving the frustration for after it gets cleaned up and inspected.

fourblades · fourblades's Garage

You are making good progress!

Tough choice on turbo versus non-turbo. Both are good choices.

If you have the motor apart, could you change over to turbo pistons and cylinders?

Not sure if those would work with you engine?

John

turnofftheradio · 10-31-2025, 07:41 AM

Quote:

Originally Posted by fourblades

You are making good progress!

Tough choice on turbo versus non-turbo. Both are good choices.

If you have the motor apart, could you change over to turbo pistons and cylinders?

Not sure if those would work with you engine?

John

I think if I open my wallet far enough I have many options. The easiest way would be to just change to a better lower compression piston. But if all my cylinders and pistons measure out poorly, I'll be forced to make a more expensive decision. If I'm changing out the cyl and pistons, my instincts say to make a higher compression n/a. I've only had one turbo car ever. an 86 omni glh that I bought used in the late 90s. It was fun, but I never went hunting for another turbo car. This car though, the first thing everyone asks is "is it a turbo?"

908/930 · 908/930's Garage

Is it properly set up for running a turbo? Proper WUR, fuel system? These engines were pretty cheap to rebuild long ago.

turnofftheradio · 11-03-2025, 06:05 AM

Quote:

Originally Posted by 908/930

Is it properly set up for running a turbo? Proper WUR, fuel system? These engines were pretty cheap to rebuild long ago.

No WUR to speak of. It runs efi on a megasquirt 1 computer, gm map, bmw idle control valve.

turnofftheradio · 09:03 AM

With Halloween and all I didn't get much done, but p&c are out from one side. On to the next!
I did have a chance too meet up with my buddy who was the previous owner who confirmed all the head studs were brand new. Then we went looking for his new porsche, which I found some leaks. Hopefully we find him the right one next time. He wants a 997s vert now.