Upgrading Engine

[ShakinJoe]

No you will not work the 915 too hard. Tyhe 84-86 Carreras used a 915 with a 3.2L engine.

I am just about to sell my 3.2L if you are looking for one.

[timmy2]

Originally Posted by maui44

Timmy2

The vehicle is a 1977 911S Targa.

Will I work the 915 to hard with a 3.2

No, if you drive it normally it should last a long time especially as your's was recently rebuilt.
If you are doing 6000 rpm clutch drops from a stop as mentioned in the Wheeler Dealer show, it will break eventually like any other transmission.

[maui44]

Thank you all for the great replies.

Based on what everyone has said, I use the 915 with the 3.2.

[maui44]

Based on the feedback, it sounds like the 915 should work well with a 3.2.

[quattrorunner]

My 915 is running with a 930
I have a 91561 as well, it's a good one and if you run a 3.2-3.6 youl be fine

[maui44]

If you can run a 915 with a 930 I am sure I be fine with a 3.2

For 930's, are most of the early Transmissions 4-speed?

[quattrorunner]

930's used 930 boxes(4 speed) till 88 I think when they used the g50 box. 930 boxes are great if you have enough torqe to turn those tall gears. Not good unless you have a turbo.

[maui44]

Could someone tell me the main differance between my 915/61 and a 915 /68 and 915/73?

Thanks

[jager911]

Agree with prior posts, I would not bother with the headache and expense of installing the G50. At that point, I'd sell what I have and buy a G50 Carrera already done.

A 915 with good syncros and adjusted linkages works just fine with a 3.2L. I upgraded from a 3.0L to a 3.2L and stayed away from the 3.6L due to cost. BTW, it's a simple upgrade, bolt-in, some minor mods to fuel lines and 14 pin connector.

[efhughes3]

Buying a used motor is a risky, and potentially expensive endeavour. I'd do the take your time route suggested by Grady, and plan a rebuild.

[maui44]

Ed,

I am in no rush at all. I am looking at doing this down the road sometime. The trigger will probably when my rebuilt 2.7 has issues that some issues.

[Dodge Man]

IMHO Why change the motor? The mid 70's 911s are finally seeing an increase in value for clean rust free cars with matching numbers. I went down the motor change road and I spent a lot of $$$ and I lost a lot of $$$ in resale value for my 73. To make your 2.7 live a long & happy life, you may just need to look at a SSI and maybe an oil cooler to help with the heat dissipation issue. Since 1977 is still under CA SMOG regulations, that is another thing to consider for a few years. You have the solid 77 motor & trans in your car which is pretty darn good. Enjoy. When the time comes, bigger, better motors will still be available.

[guru944]

maui44:

I say a little "Forced Induction" is in order here. Not much boost 5-7psi is safe. A supercharger or turbo would do it well.... It is do-able.

Later