Engine Rebuild DIY Project: 1976 Carrera 3.0
 

I am starting this thread, largely for my own reference, to track the progress of my rebuild. Hopefully others can learn something from the mistakes I will undoubtedly make, and help me get toward the finish line when I run into snags. I have some experience doing repairs on the various air cooled motors I have had over the years, and I have been through the tear down process several times, but I've never taken on the challenge of ground-up reassembly.

Opportunity has presented itself in the form of a 1976 Carrera 3.0. I have no history whatsoever on the engine, but it turns freely and the oil that came out of it looked clean. It appears as though the cases have been split before, but it's hard to say how long ago or why. My plan is to tear it down to the crank, inspect all of the internals, and do whatever repairs, replacements, and machine work seem necessary.

I'm also fielding ideas on upgrades and fuel delivery. I don't think I'm interested in going to a short stroke or larger displacement, but I suppose I haven't completely ruled it out. I am interested in the possibility of replacing the CIS with carbs.

The orphan engine doesn't yet have a car to call home, but my plan is for a Sunday driver. Little or no track use, and not a daily driver or a show/concourse car.

http://forums.pelicanparts.com/uploa...1393812176.jpg


http://forums.pelicanparts.com/uploa...1393812219.jpg


http://forums.pelicanparts.com/uploa...1393812243.jpg

As you have figured, these cases are prized by those who want to make short stroke 2.8 or 3.0 or 3.2 motors. But you'd probably have to do a lot of horsetrading to turn that to your advantage, other than trading it for some money and a later 3.0.

Im new to the forum too. I have a 1977 Euro 3.0 Carrera Targa and Im trying to find out what type of engine do I have? The number reads 930/02? The engine chassis reads 6670274. And my VIN number reads: 9117610093. Are you familiar on how to sort what type of engine does the 930/02 should be?

Walt, you're right. I'm interested in a pretty straightforward stock rebuild, at least where the long block is concerned, for my first go round. Maybe this engine has a third life as a short striker, but I don't think now is the time.

This should be an interesting build.

A straight forward rebuild is very respectable. If you found the right car to put it in you could get your money back out of your investment. A 2.7 with a good body and a bad motor would not be to hard to find, and dressing it up like a early carrera would not take a lot of effort.

Are going to increase the compression at all?

IMHO I would go carbs for sure they would help with resale down the road. A newly rebuilt motor documented by this thread would have a lot of people interested, and it would look very cool. Euro CIS would be the other way to go, if you wanted to keep the CIS.

Every 914 / 6 guy wants this one as it will bolt to the 901 and fit in the 914. I hope to be back on the dyno soon to finish up mine.

Enjoy,

The Red Book confirms:

77 Carrera 3.0 targa. There were 646 built from 9117610001 to 9117600646.
The 930/02 is the correct engine code for the Euro 3.0.
The engine VIN is correct too.

I agree that carbs are the more desirable route - we'll see what kind of $$$ it takes to get the long block done, and then see what I have left over. The CIS on the car should be euro since the engine was a euro production only, right? If not, is there a way to check?

Dressing up a mid year or SC roller is exactly what I have in mind. Would love to get one that comes with a trans and a busted motor to tackle next. Engine rebuild comes first though - I don't expect I'll be completing that piece in record time.

You should be able to pick up a decent broken mid year for less cash.

This is mine,http://forums.pelicanparts.com/uploa...1393942568.jpg

It is a 77 with a 3.0L taken up to 3.2L with the Max Moritz p&c I believe or JE, not sure because I did not do the build. It still has the CIS.

It is has oil pooling in the #2 cylinder that I'm chasing down, the car very well could have been sitting for a long time so that may be the cause. Compression and leak down are good and the the cylinder walls are in good shape. I'm hoping it is just rings that need to seat a little more or maybe it has too much oil in the reservoir and it is pushing oil into the cylinder when it gets under pressure.

I picked up an euro bumper that I'm going to put on it, and eventually some steel 74 side mirrors.

Of course the top priority is getting it running right. But after that I'm sure I will find another project for it, like carbs or bitz efi. It already is running electromotive, with bitz the car would be a screaming hotrod and easily tuneable for half the money of carbs. But carbs are much more marketable and esthetically much cooler with out a doubt.

Eli - Great car, I hope that the problem turns out to be minor. If not, you can always share the rebuild joy that seems to be contagious here on Pelican!

Carrera - the 3.0 911s before the 1978 model were not imported into the US, so the one described ought to be a Euro car with Euro stuff. Of course, if it was imported and Federalized as a gray market car, who knows. Probably no change there - my Euro 2.7 didn't have any changes made to it in the engine compartment.

But the same case was used in the 3.0 turbos, and those were imported to the US. However, again with engine number, model, and vin lining up, not a US 3.0 turbo case.

Carrera 3.0,

Before you spent time upgrading that engine, you should realize what it is you have got. It is an awesome and fairly rare engine.
The 930/02 is the correct Carrera 3.0 engine. It is more responsive than its younger SC siblings.
Mine is completely stock with CIS and all. It is very responsive compared to my friends 1979 SC.

Keep it, rebuild it and have fun.

Carrera 3.0 reported VIN of x610093.
Charley V reported VINs of x600646 to x610001 for '77 Carrera 3.0s.

Carrera 3.0's VIN does not fall within Charley V's reported range of VINs. Is there a typo in this exchange?

Jesper

My only contact with this motor is the case I used for a short stroke, so I have no personal knowledge of how these run compared with later SCs.

However, on paper there seems no significant difference between these European early 3.0 engines and the later (78-9) motors. Same bore, stroke, CR (within a point, anyway) and cam, and same type of intake. So if you put the same exhausts on them, why would one have some kind of performance advantage over the other.

Isn't the only physical difference the diameter of the #1 main web, and the 6 vs 9 bolt configuration of the crank end? And the 9 bolt 70.4s greater resistance to shaking off its flywheels?

They are very similar, but the Carrera 3.0 uses the lighter 2.7 crank (along with the 6 bolt flywheel, as you mention) which is lighter, making the engine more responsive. The valve timing is also different, I believe.

I am not an expert. All I can say is I love the responsiveness of my Carrera 3.0, even with CIS. It is so much more fun and temperamental compared to an early SC.
BTW, mine has a stock style dansk stainless exhaust.

I'm definitely looking forward to following this build. I plan on doing a rebuild on my carrera 3.0 engine within the next year. (Along with a bare metal resto on the body)

Carrera3.0: I look forward to your completion and account on your Carrera 3.0L engine challenges. Im not a porsche guru (specialist by any means) but everyone I have talked to and everything I have read specifically about the 930/02 engine type (which you have) is they are 1) very special; 2) very expensive; 3) one hell of an engine.

Charlie V: Thank you for your response to my inquiry. I do have a 1977 Euro (RoM) 911 Carrera 3.0L Targa and several people have confirmed what you gave me. The engine type 930/02 is for a Euro 76-77 911 Carrera 3.0L RoW

Thanks for all of the comments. In my experience, these engines are much more responsive, especially in the higher rpm range. I also just like having something that is a unique chapter of the 911 story, and a rare model (especially here in the states).

Maintaining the basic stock configuration is definitely a priority, although carbs are a tempting upgrade due to their marketability, appearance, and simplicity.

As a side note, my engine is actually a 930/12. It is identical to the 930/02 except that it shipped with a sportomatic mated to it. It will definitely be used with a 901 or 915 in its next application.

Carrera 3.0: Where are you doing your engine rebuilding? Im in the Riverside/Palm Springs area.