Need help identifying engine

[porschenut66]

Recently bought a '70 911E that has a later engine...it's a 2.7 and I was told it was a Carrera engine. The number is 6342434. I'd appreciate any input. Thx!

[75 911s]

74 2.7 Could be a Carrera motor or a 911S as in my Red book, it lists the same serial numbers for both the 911s and the Carrera. 6340001-6342804. 1 of 528 if it is a Carrera motor.

[ossiblue]

Originally Posted by porschenut66

Recently bought a '70 911E that has a later engine...it's a 2.7 and I was told it was a Carrera engine. The number is 6342434. I'd appreciate any input. Thx!

That looks to be a 1974 S engine, also used in the U.S. Carrera. 175 hp/5800rpm. Engine type 911/93.

The ROW Carrera engine, type 911/83, was rated at 210hp/6300rpm, just for comparison.

[porschenut66]

So I need to find that engine case stamping to confirm which then, correct?

[Matt Monson]

Originally Posted by porschenut66

So I need to find that engine case stamping to confirm which then, correct?

Nope. A 911/83 Carrera engine would start with 664 instead of 634. It’s just a US engine.

[porschenut66]

Crap. Oh well, still a decent engine I guess. Thx

[ossiblue]

Originally Posted by porschenut66

Crap. Oh well, still a decent engine I guess. Thx

Well, if it makes you feel better, the engine you have is rated at 175hp compared to the standard 911 for 1974 which was rated at 150hp. Further, all the engines for 1975-77, sold in the U.S., were S engines rated at 165hp, so you're "better" than the remaining years of 2.7s sold here.

Only the ROW S engines in '74-75 equaled 175hp, and the ROW Carrera for those same years were rated at 210hp ('76-77 rated at 200hp.)

All in all, being a '74 S that came without heat generating emissions equipment, you have a very sought after engine of that era. Keep in mind, the stud pulling is still a concern and if it hasn't been addressed, that's something to consider.

[porschenut66]

It was completely rebuilt and has about 10k on it. I meant crap that it's not the Carrera engine as it's more desirable, but I realize it's still a tad bit more special than standard. Thx for the input.

[ossiblue]

Originally Posted by porschenut66

It was completely rebuilt and has about 10k on it. I meant crap that it's not the Carrera engine as it's more desirable, but I realize it's still a tad bit more special than standard. Thx for the input.

Actually, it is the Carrera engine--for 1974 U.S. cars, so if that's what you were told by the PO, it is correct information.

But I know what you meant. You wish you had the ROW Carrera engine! Now that would have been a gift that warranted a true celebration.

[porschenut66]

Oh gotcha. Cool, but yes I was hoping it was the ROW version. Can't complain. Thx again!

[Matt Monson]

As L.J. has indicated, that's a great little engine, especially if it was rebuilt properly. Bruce Anderson unfairly biased the world against 2.7l engines as a group.

[porschenut66]

Been sitting a few years so going thru it obviously, but it was rebuilt by a reputable Porsche shop so I'm hoping so. Running on Weber 40's no longer MFI.

[Matt Monson]

Only the row engine got mfi. It would have been cis to start. A common upgrade back then was the mfi p&c set. You’ll want to check for that and what cams to optimize performance. With carbs you should be able to get over 200hp the pretty easily.

[porschenut66]

Sweet! PO is getting me two folders of records including the rebuild. Thx

[Bob Kontak]

Originally Posted by Matt Monson

As L.J. has indicated, that's a great little engine, especially if it was rebuilt properly. Bruce Anderson unfairly biased the world against 2.7l engines as a group.

I swear The Bruce said the 2.7 was a good engine if sorted properly.

Now, that may have been at the end of a tirade.