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Location: Yorkshire UK
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3.2 G50 to 915 Flywheel Swap

Im transplanting a 3.2 engine into my early 911 the engine originally had a G50 transmition, to get this to work with my 915 im aware I will need to aquire a 84 - 86 flywheel but what about the pilot bearing as this is in the flywheel on the G50 but on the 915 3.2's it bolts to the crankshaft itself will my later G50 style crank still be able to take the earlier 915 bolt on pilot bearing?

Steve

Old 10-16-2005, 04:49 AM
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There are 3 threaded holes on the end of the crank. Have you taken the flywheel off the 3.2? They'll be there. I have an almost new 84 flywheel and pilot bearing if you don't already have it. We fitted it to an engine, then used the later flywheel instead.
Old 10-16-2005, 06:41 AM
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KTL KTL is offline
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Souk's right on. 100%

I did a 3.6 swap this summer and we swapped a SC 3.6/915 and a Carrera 3.2 G50 car. When we put the 3.2 into the SC w/915, we needed a 84-86 flywheel and a new 3-bolt pilot bearing. Everything bolted up perfectly. Why? Because the 3.2 G50 cars and 3.2 915 cars use the same crankshaft, and 915's are pretty much all the same from 78-86. The only thing we had to do that would qualify as remotely "special" was swap between engines the long studs that secure the engine to the transmission.
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Kevin L
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Old 10-16-2005, 07:54 AM
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Quote:
Originally posted by KTL
I did a 3.6 swap this summer and we swapped a SC 3.6/915 and a Carrera 3.2 G50 car.
Whats this "I" stuff? Did "you" also have to expand the notch for the sensor on the 915? I can't remember if we did that on the 915 or the g50.
Old 10-16-2005, 08:09 AM
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KTL KTL is offline
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Hey man, reread your quote.

"I did a 3.6 swap this summer and we swapped a SC 3.6/915 and a Carrera 3.2 G50 car."

I gave you credit!

And WE had to do the re-notching on the 915 because the 3.2 has two sensors instead of the one on the 3.6. Needed a bigger notch. My contribution was handing you the hacksaw. I let you do the trans. because I had to cut the hole in the oil cooler shroud with the rotozip saw. Dude, my tool collection totally saved your sorry arse on that swap!!!

NATCH.
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Old 10-16-2005, 08:25 AM
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Thanks for you help guys I was worried there for a min that they mighnt not be compatible.

What do you recommend for cutting the sensor notches into the gearbox? this part really bothers me as I dont wanna screw up my box so I want to make as neat a job as possible, anyone got any pics of these notches that they have done?

Steve
Old 10-16-2005, 10:54 AM
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A perfectly good transmission! One drill, one saw, a grinder and a file!

(drill two holes at the corners of your proposed opening, then use a saw (Kevin used a hacksaw I believe. I use a Skills SAWZALL...goes through the aluminum nice and easy. Then I used a couple of files to smooth everything. Notice I cut to the webbing. Using the drill, I also help prevent cracking at the corners.

Edit: The tranny in the picture is not a 915, so use your judgement as to how you will cut it. The webbing I cut to on this tranny, may not be on your 915.










Last edited by MotoSook; 10-16-2005 at 11:11 AM..
Old 10-16-2005, 11:00 AM
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Hi Souk thanks for the pics just noticed the end of your input shaft doesnt seem as long as mine have you had to modify this?

Steve
Old 10-16-2005, 11:17 AM
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Steve, the tranny in the picture is not a 915. I added an edit note in my last post. Sorry for the confusion.

Last edited by MotoSook; 10-16-2005 at 12:13 PM..
Old 10-16-2005, 11:18 AM
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Right ok just read that thanks!

Old 10-16-2005, 11:29 AM
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