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Location: Lake Tapps, WA
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3.6 transplant - clutch questions
The motor is a 1992 3.6L that I am mating to a 915 transmission. I do not necessarily need a flywheel with reference sensor marks. I tried installing an SC flywheel but the perimeter of the flywheel contacts the case itself thereby limiting rotation.
Any suggestions on which clutch parts work for a 3.6 / 915 swap?
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'67 911S '69 911S, '70 911ST '73 911T Targa Signal Yellow '78 911SC backdate |
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02-23-2018, 03:58 PM
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You need a properly modified flywheel from Patrick or Instant G to allow the pressure plate and clutch to work properly. Then you need at least a Sachs performance clutch. Then you might as well get the 7 mm turbo clutch cable.
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1980 911 - Metzger 3.6L 2016 Cayman S |
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02-23-2018, 05:04 PM
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Quote:
Yes, this is the correct way to connect the 964 engine to the 915 transmission . . . And, then after some ?? miles you may be rebuilding your 915 . . . Regards,
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2002 Porsche Boxster S Cobalt Blue/Blk/Blk Crew Chief for Son's 1978 Porsche 911SC Original Porsche Mocha Brown 3.8L NASA race car Previous Porsches: 1958 356 Red Coupe - 1972 914 Blue -1972 911T Coupe Aubergine Last edited by Sboxin; 02-24-2018 at 05:20 PM.. |
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02-24-2018, 09:55 AM
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You don't really need anything from Patrick or Instant G. That is just wrong.
I have run: Lightened 911 flywheel, 6 puck clutch and KEP cover plate. Lightened 911 flywheel, 6 puck clutch and ALU Sachs RSR plate. Currently Fidanza flywheel, 6 puck clutch and ALU Sachs RSR plate. All with a standard SC-style clutch cable. 3.6 L 964/993 based engines with 9 bolt cranks. I have my old 911 lightened flywheel if anyone needs it. It is NOT yet listed in the classifieds. I run aftermarket EFI. JWE have a new system that is also very light and works very well. Custom cover and 4 puck disk. Not sure which flywheel. I like the Fidanza. You have to do some simple case clearancing for it to work. Took all of 15 minutes for that.
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Mike PCA Golden Gate Region Porsche Racing Club #4 BMWCCA NASA Last edited by Mahler9th; 02-24-2018 at 02:02 PM.. |
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02-24-2018, 01:58 PM
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Good to know...thanks Mike. Which flywheel did you use? I tried to mount an SC flywheel since I don't need DME reference marks. It hits the case and prevents turning the motor over. I need a FW with a little deeper dish so it moves away from the case a bit more.
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'67 911S '69 911S, '70 911ST '73 911T Targa Signal Yellow '78 911SC backdate |
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02-24-2018, 02:31 PM
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Here is a picture of the Porsche flywheel I used for many years:
 My application is racing, and when I bought the car, it had a 3.8 with this clutch system already installed. This was used with a 3.6 case, a SACHS RSR pressure plate, a 915-style t/o bearing and a six puck, six spring clutch disc from Clutchnet. When my Sachs PP was no longer serviceable, I switched to a KEP. And I have aftermarket EFI so I don't need any type of sensing features in my clutch system. I have not weighed this flywheel. It appears to be stock. I took it out of service in '15 and replaced it with a Fidanza. I had to do a little clearancing on the case for the Fidanza.
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Mike PCA Golden Gate Region Porsche Racing Club #4 BMWCCA NASA |
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03-01-2018, 11:17 AM
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anyone have pics of the clearance mod to the case or know what to do?
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1967 911 (Azzuro Thetys) - #308439 1971 911 (PTS Black) - Built 3.6 Sleeper 1989 911 (Grand Prix White) - Cabriolet Bone Stock |
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03-01-2018, 12:36 PM
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If you are referring to using a Fidanza with a 3.6 case, yes I know what needs to be done, since I did it. I do not have any pictures, and I don't have my engine right now.
It is pretty straightforward.
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Mike PCA Golden Gate Region Porsche Racing Club #4 BMWCCA NASA |
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03-01-2018, 12:48 PM
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Many years ago (1992), I put a '89 964 3.6 into my'80SC. Back then there were no fancy transplant kits available. My dilemma was hooking up a 915 to the 964 3.6. The '89 had a regular 240mm flywheel, not the dual mass one. No one was making a "transplant to 915 flywheel" so I improvised.
I took the 964 240mm flywheel to a machine shop and had it drilled/threaded to fit a 915 225mm pressure plate to work with the 915 clutch plate. Has been working great for the last 26yrs. The flywheel is pn 964 102 239 00. I did a search on PP and it doesn't come up for some reason, but a Google search found it at PP, go figure. Anyway also found one on Ebay for $325 here: You may not want to go the redrill route, but it sure does work and could solve your problem.
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa Last edited by uwanna; 03-01-2018 at 01:25 PM.. |
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03-01-2018, 01:18 PM
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Flywheel - 911 / 915 225mm Conversion to 964 & 993 3.6L DME Engines By Patrick Motorsports Porsche & Mid Engine Performance Specialists
Machine work all done, ready to go. Peace out from Village idiot
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1980 911 - Metzger 3.6L 2016 Cayman S |
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03-01-2018, 07:37 PM
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PMS is out of stock at the moment and have been for several months. They did offer to machine one up from a factory FW to fit my needs. We'll see what I get.....
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'67 911S '69 911S, '70 911ST '73 911T Targa Signal Yellow '78 911SC backdate |
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03-02-2018, 05:20 AM
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Couldn't you just acquire a flywheel like the one I used?
It appears to be stock, and you can see the part number from the picture. If you don't need any timing or reference marks, that would seem the least expensive and most hassle-free approach. I am going to measure and examine mine and if it is okay for more service place an ad for it in the classifieds. As an aside, it seems to me that there are a lot of misconceptions about "must haves" to install a 993 engine in an earlier car. One of my favorites is the throttle linkage from the tranny bell crank to the throttle body. I think many/most folks believe that this "must" be a cable of some sort. Turns out that there are other ways to skin this cat. In my case (993 intake system with 964 throttle) I use a conventional 911 throttle rod I bought for $5 from a dismantler, and a simple bolt on approach. No need for a cable. - MM
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Mike PCA Golden Gate Region Porsche Racing Club #4 BMWCCA NASA |
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03-02-2018, 07:20 AM
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Quote:
Never understood what that was all about. I like you used the rod to the tranny belcrank connected to an earlier engine mounted belcrank console and a rod to the throttle body. It works just like it did on the 3.2 Carrera motor. Did this 26yrs ago when not many folks were doing transplants and it seemed to be common sense to me.
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'80SC Widebody 3.6 transplant Anthracite "The Rocket" Long gone but still miss them all: '77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!) '71 911T Coupe White, '70 911T Coupe Blue '68 911 Coupe Orange, '68 911L Soft Window Targa |
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03-02-2018, 08:10 AM
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Quote:
I did the same thing in 2012  
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03-02-2018, 08:59 AM
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Sboxin
UPS Porsche
1980 Porsche 911SC 3.6l
