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New to me 3.6 engine. What to do?

So I have collected a 1973 911 with most of RSR body bits installed, 3.6 engine from a 1991 with (115,000 miles?), and a G50 with LSD.

What do I do with the engine? Bank is hurt collecting all the fun goodies, and I was told all the parts work? But what to do before assembling the shinny little spoon.

Recomendations that don't brake the bank.

Old 09-16-2020, 11:03 PM
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Have fun fitting that G50 is the 1973 chassis without a lot of fab work....
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Old 09-16-2020, 11:37 PM
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I have some welding skills. Got any pics or threads about it?
Old 09-16-2020, 11:52 PM
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Quote:
Originally Posted by 0cean View Post
I have some welding skills. Got any pics or threads about it?
Going to take a lot more than some welding, torsion tubes are in the way and you need to install a hydraulic pedal set and clutch slave from an 87-89 Carrera. You can have the transmission shortened also, which is what I did when putting a G50 into a 930, but thats $$$ too. It's all doable though!
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Old 09-17-2020, 03:56 AM
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Nice collection of parts. Should make a great finished product.

I think there are threads on here that cover putting a G50 in it. I know it’s pretty involved but if you can weld and follow instructions then it should be doable. I never followed those threads because I have neither a narrow body nor a G50.

Good luck. It’s been done so at least you know it’s doable. Search for G50 in a narrow body to find the threads.
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Old 09-17-2020, 04:01 AM
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Sell the G50 and get a built 915. Make life a lot easier.
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Old 09-17-2020, 05:21 AM
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I faced your dilemma many years ago (1992). Found a 20K mile 964 3.6 and the G50 with it. Plan was to install in my '80SC. Looked things over and decided the G50
install was fraught with too many difficulties, so I sold the G50 for a great price
and bought a brand new, in the crate 915/70 w/LSD for $1500. Price sounds impossible
but it was in '92. Conversion was relatively easy even though there were no fancy
conversion kits available back then. Car is still running flawlessly after all the years and
the 915 has held up with no problems. So make your life easy and sell your G50 and
find good rebuilt, beefed up 915, then get on with it.
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Old 09-17-2020, 05:48 AM
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Local friend is installing a G50 into a 75 backdate to a 73 RSR.

As others have said, it's a fair amount of fab work, but it's also a lot more cash.

You need a pedal cluster, slave cylinder setup and the hydrualic lines.

Mod the torsion bar tube to clear. *which means different spring plates as the torsion bar is further out now. Or move to coil overs.

Shorten the bell housing on the g50

Custom mount for the g50 (Patrick motorsports)

It's an additional 10-15k in parts and fab work all said and done.

It's also a much heavier trans than say a mag 915.

Maybe drive a g50 carrera and then a 915 carrera before deciding if that juice is worth the squeeze.
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Old 09-17-2020, 05:57 AM
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What about the new-used engine? I'm not looking for a full rebuild because of cost, yet not sure best options for a little refresh
Old 09-17-2020, 06:04 AM
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Quote:
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What about the new-used engine? I'm not looking for a full rebuild because of cost, yet not sure best options for a little refresh
For just a reseal and fix anything obvious, about $3k (if nothing is broken) at a shop and $500 or so DIY if you are able to do it. Don't neglect the dizzy belt...

Top end rebuild and reseal, about $7-8K at a shop if it has the newer (late 91 on) heads with seals, add another $1000 to add head gaskets (machining).

Full rebuild upwards to $20k at a shop.

I fully agree that buying a 915 then having it rebuilt with the new reinforced parts will save you MANY thousands of dollars and a lot of frustration..
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Old 09-17-2020, 06:54 AM
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Early clutch arm on a 915 with a Wavetrac LSD plus a Sachs power clutch and a modded Patrick motorsports flywheel. Clutch cable is from a turbo.
This is your drive train

Oil line crossover conversion with some GT headers and modified tin work is for the engine. 964 fuel filter to AN hardware fuel lines with #6 hose all the way to the fuel pump. Adjustable fuel regulator for a bit more fuel pressure.
964 harness with a re mounted DME unit on rear seat wall

10 years of TT track duty and as much fun possible with clothing on since then

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Old 09-17-2020, 07:31 AM
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