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Registered
Join Date: Aug 2004
Location: New Brunswick, Canada
Posts: 5,472
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Engine interchangeability-flywheels & clutches
Hi folks,
I've done a search on this and THINK I have it figured out... 1) From what I've read, any 911 engine will physically bolt up to any 901/915 transmission housing. 2) Generally speaking, you keep the flywheel that came on the engine, and use the PP & clutch disc for the transmission. So, if I was putting a 78 3.0 SC motor in a '69, I'd use the SC flywheel, with the 69 PP & disc. The exception, I think, is the 70-71. In that case you use the flywheel, clutch & disc and bolt it up to whatever engine you're using. Am I correct?
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Jake Often wrong, but never in doubt. '81 911 euro SC (bits & pieces) '03 Carrera 4s '97 LX450 / '85 LeCar / '88 Iltis + a whole bunch of boats |
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11-25-2005, 11:22 AM
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up-fixing der car(ma)
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Any 911 engine will physically bolt up -- no problem..
65-69 "Dish" style flywheel, 6 bolts on the crank (originally w/ push 215mm clutch/pp) 70-77 "Flat" style, also 6 bolts on the crank (225mm; runs with 915 clutch or the 70-71 Pull-type 911/901 clutch) 911SC style "Flat" 9 bolts (915 trans, '70-71 trans as well). Won't hook up with a stock 901 transmission ('65-69) and clutch--need a custom flywheel. 3.2 Carrera "Dish" 9 bolts . May work with a 901 clutch because it is dished too, but I have never tried it. All pre-78 911 engines have 6-bolt crankshafts, and thus must run the first 2 styles of flywheel. The SC+ engines are all 9 bolt. Generally speaking, your (2) is correct. But an exception is using the 9-bolt motor with a 901 trans! Good luck, Scott
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Scott Kinder kindersport @ gmail.com |
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11-25-2005, 11:41 AM
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Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
Posts: 10,040
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"using the 9-bolt motor with a 901 trans"
or with a 911 trans. For that, you need to get an adapter flywheel from Kennedy or Patrick. They apparently just weld the new hub onto the old flywheel (or vice versa). Be SURE you get it bablanced - I posted pics a couple years ago of what it took to get mine in balance. Their QC doesn't seem too good.... We haven't gotten into the cutouts needed for various electronic sensors - no biggie, but I have "crude gasoline dumping devices" so had no worries. PS - some people call the CGDD's "carbs"
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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11-25-2005, 12:56 PM
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Registered
Join Date: Jan 2002
Location: Glyndon MD
Posts: 327
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Dumb question, but which flywheels have the pins for pressure plate location? I am rebuilding a 73.5 engine that came with that type of flywheel, but the clutch pilot tool I got from PP doesn't fit the splines, and someone once told me that the pin-type flywheel came from an older car. The flywheel is approximately 27.62 cm across the teeth.
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David Porter Glyndon MD '72 911T Targa |
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11-25-2005, 03:39 PM
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Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,750
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David, someone will come along and answer the pin ques, but you just got the wrong pilot tool. Duh, you knew that, but you have to tell the sales guys what year the PP and disc is for the right tool.
What trans is in your car? Should be a 915, but you could have a 901 instead. That one has locations for pins in the PP, IIRC. |
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11-25-2005, 04:10 PM
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Registered
Join Date: Jan 2002
Location: Glyndon MD
Posts: 327
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The car it's going into is a '72 with a 915, but I don't know what trans the 73.5 engine was attached to last time it ran. The engine came to me in a crate.
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David Porter Glyndon MD '72 911T Targa |
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11-25-2005, 07:16 PM
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