Carrera 3.0 vs. SC 3.0
 

Can anyone list the advantages vs. disadvantages of these two engines.? I'm considering trading one for the other and going to carbs or MFI. Thanx.

I'm anxious to hear this...I always thought Carrera's had 3.2L and SC's had 3.0L

3.0
 

besides the difference in euro fuel injection ..the big difference is the carerra 3.0 have the cam timing advanced to 1.5mm much better response

Nine9six,

The later Carrera was a 3.2. But way before that, there was a Carrera 3.0 when this was still a model and not a blanket name for the whole 911 range in NA form. Then came the SC "Super Carrera". They had to keep coming up with names to help people forget the longhoods! It was still years away from an RS reapearing :) tongue 'n' cheek

Carrera 3.0 has same crank as the 2.7's and 2.4's, and the 3.0 930's. But it has the Aluminum case of the 3.0 930. Other than that it has the bigger ports on the heads and larger euro CIS system. The SCs have a heaver crank more akin to the Turbo 3.3 and depending on the year has smaller ports on the heads People say the the Carrera 3.0 has the torque of a SC but spins like a 2.7. I have one in mine and it is great.

The biggest advantage to the 3.0 carrera is making that engine into a 2.8 short stroke MFI'ed beast....It would also be my choice of the 2 and I think the resale value is also a plus.

Luke,
Thanks for the history lesson.

Suppose I need Carrera 3.0 heads. Are they different from an SC?

Basically, are there any parts that are unique to the Carrera 3.0 that I'd have a hard time finding?

The 3.0litre Carrera was not released in the US of A but parts are still available (ex Germany if needed). The 3.litre carrera was rated @ 200HP compared to the early SCs 180hp.
Having driven both on the track the Carrera is much quicker when both are unmodified.
I have just fitted Tony's EFI kit ot my 3litre carrera and have gained 10 Kw @ the rear wheels. So far I haven't had time to try it out on the track to see how this relates to seconds per lap.

C3 heads are the same as early SC, the large 39/35 ports were used thru '79. In '80 the SC heads went to the smaller 34/35 ports

The only really difficult part to come by will be the C3 CIS fuel distributor.

I had a '76 C3 from '76 - '94 when the engine was swapped out for a 964 engine, never had an issue w/ parts

The main reason the C3 will feel quicker is that the whole car is lighter than the SC, often they had 15" wheels which will provide better low speed acceleration than the taller 16" on the SC.

The C3 engine is a bit stronger and will rev quicker but not a whole lot of difference.

So does SC mean super carrera? I had read standard coupe but wasn't sure exactly what SC meant.

Maybe Bil V can chime in...but I always thought the C3 engine had different bearing diameters than SC...due to the different crank arrangement ... ????

Wil

There is some dispute as to what "SC" meant. Short of a British advertising brochure I don't think the factory ever called it a "Super Carrera" (though that may have been what "SC stood for). The "SC" designation was previously used on a 356 model.

IMO it a little like referring to the over the counter pain reliever "Tylenol PM" as "Tylenol Post Meridiem". Sure, technically, that's what PM stands for, you're just never going to find the manufacturer calling it that.
-Chris

I had heard it meant, "Super Coupe". But if you have an SC targa or cab???
Maybe Grady knows.

Yes, that's why they rev a little better, the crank is the 2.7 crank not the latter 930 crank

I always thought that SC was a call back to the 356 when they went from an 'A' model, then to a 'B' model, then to a 'C' model, and to do one better they finally had a 'SC' which was an improvement on the 'C'. Not to be confused with the Carrera which had a completely different engine.