Engine details needed

[cape911]

Please help. I recently bought a 1979, 911 Targa which had an engine change sometime in its life. I have been told the motor is not a standard replacement......Please can you tell me what the new motor is either a 911T, 911S or 911RS and what year.
Engine number : 6220241

[javadog]

Probably from a 1972 911E.

JR

[Balloonmeister]

I agree with JR. From the Porsche 911 Red Book, by Paternie and Bodensteiner, 2015, page 35, engine 6220241, was first in a 1972 911E. 1124 were produced in that year/series.

[cape911]

Thanks JR and Harry. Would this explain why the replacement is a MFI motor (I havent technical knowledge in this dept) as i heard a porsche mechanis saying that "they've blanked off ......." and that all the "parts on the top are standard, but the motor was either an S etc."
Would this explain the E derivative?

[javadog]

I really don't understand your post. All I can tell you is that the original engine probably suffered some sort of problem, so rather than fix it, they installed a used engine. The engine they bought to replace it happens to be a 1972 911E motor. All motors of that type had MFI.

Perhaps what you are saying is that the MFI injection components were removed and replaced with the CIS components from the original engine. If that is the case, it's not a good swap. A 911E motor is going to be worth a lot more money if it has it's original injection components, it would run better with it's original injection than it will with a different system that was never intended to be used on it (god knows what they would have done to adapt it) and the correct 911SC engine would make more power and torque than any 911E motor.

JR