1973 911T Engine conversion to 2.8 RSR Engine. Need help.

[davidbir]

Originally Posted by Turboo934

Find an early 930 and your 80% there..

I never intended posting on this thread but that is the best advice probably
Find a Turbo with a missing powertrain and install a 3.2 Carrera.

As regards driving on the track, if you have never done it you will be amazed at what there is to learn-If you have done it, you already know. The advice is all well intended I am sure.

[Hebrewhomeboy]

Originally Posted by YTNUKLR

hebrewhomeboy-

No, it's not possible with an SC engine block. The 1975-1977 Carrera 3.0 and 930 Turbo (3.0) engines used the aluminum block and 911SC head stud spacing, however, they used a 6-bolt 2.7L crankshaft originally, which has the same stroke as the 3.0 crankshaft. When Porsche made the 911SC engine, they changed the crank to a 9-bolt updated unit, and made corresponding changes to the case. Since the 2.0/2.2L 66mm Short stroke crankshaft from the early engines is a 6-bolt only, it will not work in anything later than a '77 C3.0/930 case or 2.7 case.

There is however, a very rare 956 2.8L crankshaft that Porsche made, that has a 66mm stroke, fits inside all dry-sump engine cases from 1978-2010, and has 911SC rod journals.

Thanks!

[YTNUKLR]

Henry @ Supertec made a batch of 5. I got one of them. Beautiful pieces. I don't think they will be made again in this economy.

I think making these cranks is less expensive than finding a nice real 956 crank or a NOS 956 crank, though out of any engine, a 2.8SS is certainly in nose-bleed territory.

PS.: If there were 5 people that want to contact me and/or Henry Schmidt to pre-order/reserve a "SuperCrank" 9-bolt billet 66mm crank, I am sure we could make another run. I could use one more, but not 5...

[Duckworth]

This motor is built on a 3.2 -- recall it on Jeff Alton's car).

Induction is very nice.....and seldom do you hear of DC44 cam selection :

3.4L based on a 3.2 (case, crank, rods, and heads)
10.5:1 compression (measured)
DC44 cams on 108 lobe centers

Balanced rods and pistons
Twin plugged
Microtech ECU and ignition box
6 dual tower MSD coils
Race valve spring and Ti retainers
Jenvey 48mm ITB's with blended manifolds and custom linkage
Big Setrab front mount oil cooler
B&B headers with heat





______________

'82 911- sold
'77 Spitfire

[NavySailor47]

That is one sweet engine.

[davidbir]

Here is a short cut that will get you driving your dream car this weekend!:
FS 911 SC IROC look street/track car

No connection etc....

And then I can buy your 73T....

[NavySailor47]

I'm sorry. As amazing a car that is, and for such an amzing price, this is a project that I really want to do with this car.

[davidbir]

I understand where you are coming from. But. I am 61 and in the past 35 years I have restored or overseen the restoration of a lot of cars. It is very rare for a restored car to come up to the owners expectations-that is human nature. If you got the car above you could make the engine your project--slide throttle injection etc-but in the meantime you have a car to drive.
My preferred alternative is an early Turbo missing it's power train as I mentioned earlier. You say that money is not a concern right now, but it will be when you finally come to sell this car and a re-engined Turbo is going to be worth a lot more money for reasons of 'intrinsic value'. Just my 2c worth.


ps and you could sell me the 73T--oh, did I already say that?

[NavySailor47]

Lol. Not for sale. Thanks anyways.

[RWebb]

It's good to start young on these projects.

I've seen several 356 restorations where they owner died before the shop finished his car...