SC plans

[1980 911 sc]

Options and more options...

I will be rebuildign my 80 euro SC 3.0 liter do to head stud. This is what I am thinking of doing as upgrades...

bumpin up displacement to 3.2 with maybe 10.5:1 CR non CIS 98mm P&C's. S cams. 24 raceware head studs. Port and polish heads, valve job, new valve guides, and dual plugs. 46 PMO and some sort of dual plug spark system ( dont know if going dual distributor or electronic yet) and finally SSI or headers.

a few little questions:
What kinda power am I lookin at?
I am figuring this will cost arround 9K to DIY. Am I close?
Am I missing anything?
what kinda machining is required on the case for the 98mm P&C's?

I am reading books as much as I can.... hershey day is closin fast, and I need to define my final motor configuration before then...and maybe even start on the teardown...

thanks in advance!

[dd74]

I'd say prepare yourself for around 240 to 250 hp.

9K is about the right ball park with about 1K to spare, I think.

I've never heard of a need to machine the case for 98mm. Just slip in the P&Cs, though I could be wrong.

Whatever the case, your plans sounds great! Update us often with your progress.

[Porschekid962]

46 carbs might be too big honestly. the s cams might be too lumpy for street driving especially if you plan on using carbs. as far as the ignition, electramotive makes a stand alone unit which eliminates the dizzy. two coil packs, a trigger and your off.

hope all goes well, got any pics???

[jgparker]

Wow, that sounds like a great engine. You'll need to build the engine to spin to around 7500 rpm to get the most out of it. I agree that 46 carbs might be to big for the street. Talk to Richard at PMO. I disagree that S-cams/Webers are too lumpy. On a 3.2 they will be very streetable. Seems like I just said that somewhere else...

Good luck,

JP