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Join Date: Aug 2011
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1966 2.0 rebuild & upgrade

I have an all original 1966 911. The 2.0 motor was frozen from sitting 20 years. One cylinder is cracked. Though this car is likely a garage queen the rest of life. with 1,000 or less miles per year, I would like to build up the motor a bit for more bottom end and mid range torque for general street and highway use, not racing. I'm considering the 2.4 cylinder & piston swap as I understand it fits with only a bit of machining.

1.) can I go all the way to 2.7 ? Easily ?

2.) what combo of pistons to get 9:1 or 9.5:1 compression ?

3.) my original heads are solid but need rebuilt---should I swap in the heads from 2.4 or 2.7 as well ?

4.) my stock cam "appears" useable--is it advised ?

all advice is appreciated.

Chris in Kansas City
Old 06-22-2016, 09:03 AM
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Personally, I would use the 2.2E setup and keep the Solex cams. 2.4 and 2.7 used the longer stroke crank, and you won't get the compression from your 66mm stock crank.

Of course, it will be expensive.
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Old 06-22-2016, 09:56 AM
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Chris, see this thread:

Suggestions for warmed over 2.0 901/05?

Do a tag search for 901/05 here, you will find all my threads on rebuilding my '66 engine. I asked all the questions you did.
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Old 06-22-2016, 11:55 AM
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Chris,

Everyone has their own plans and desires for their car and you have the right to do whatever you want to that 1966 911.

But if you're really going to make this car a garage queen, and it's a nice in other ways, you might want to consider restoring it as originally as possible to maximize its value and your return on investment. As I'm sure you know, the values of very early 911s have skyrocketed, but only for those that are most original. My approach would be to carefully put it back like it was and buy another car that had the road/highway grunt you're looking for.
Old 06-22-2016, 12:33 PM
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Those cars now have huge value, especially if they are in top condition so I'd be VERY careful not to do something that potentially costs you $100K or more.

If it were me, I would build out the engine to 2.2S specs, keeping your original cams. Keep the stock heads, cam housings, and all that as well!

A 2.2 runs very very well and provides far more driveability than the stock 2.0.
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Old 06-22-2016, 02:18 PM
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