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Nux Nux is offline
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Join Date: Mar 2016
Location: Copenhagen, Denmark
Posts: 684
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Educate me on a '77 Turbo please

During all of 2018, I've been more or less obsessed by the idea of building a Turbo 911. It started out with with the idea of turboing my own '78 3.2SS. But I just rebuilt that, and it has ITB's and the works. A little too high CR anyway.

I also have a very nice 3.6 setting. It's been looking at me for some time now. But it's too nice to take apart for a build. I'm going another direction with that (or just sell it).

So yesterday, I stumbled upon this baby:





So this should be a fairly rare beast: A 1977 3.0 US Turbo (with tranny). Now, these were rated a very low 6.5:1CR - for US smog reasons at that time I guess?

It will likely need a rebuild. With a more modern turbo and some generel upgrades, should I change compression to say, 7.5:1 or should I just throw 1.4 bar of boost at it (wild guess)?

Any limitations or issues that I should be aware of with this engine?

Oh, and I would probably convert it to EFI. I simply love EFI
Old 01-07-2019, 10:08 AM
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