924Board.org

Fuzzbeaner · Joined: 03 Dec 2003 Posts: 236 Location: Central MA

Ok, I have a 77' 924, and the driveshaft cutting idea, but with the driveshaft there, I can't find the diameter of the inside of the torque tube. There's a sorta cylinder that protrudes by .5 cm or so on the motor, and it looks like it might JUST fit, and my rough calculations made it look like it would work.

Anyways, does someone have a torque tube out of the their N/A 924 that they can measure the inner-diameter of? (IE diameter of the cavity) Else, does someone know where I can find that info?

Thanks,
-Jeff
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A Ravaged '77 924 (Electric Conversion in Progress)

1982Porsche924 · Joined: 14 Nov 2002 Posts: 679 Location: Cupertino, CA

The driveshaft itself is 20mm, and the bearings around it are tight, if that helps, inside diameter of the torque tube is a great deal larger than 20mm.
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1979 Porsche 924 "S"
Engine: Euro pistons, Light Flywheel, Weber TB, Bursch Header, Cam Wheel
Suspension: Front coil-overs, adj sways, Solid bush. Thicker tors. bars, 5-bolt, BBS rims
Body: Fiberglass widebody kit, 931 Nose

kaffine · Joined: 13 Jun 2003 Posts: 644 Location: Las Vegas

Well using a tape measure to measure one of the rubber bushings the bearings sit in I get 3 inches. If you need a more acurate measurment let me know and I'll see if I can find my dial caliper.
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80 924
80 931

The best desciption of an atom boils down to something unknown is doing we don't know what.
Sir Arthur Eddington

Fuzzbeaner · Joined: 03 Dec 2003 Posts: 236 Location: Central MA

Don't like being a bother, but more accurate would be excellent.

Right now from my ROUGH measurements using too much math and effort I got 3.1555 for the shaft hole and 3.1875 for my motor cylinder. I think the outside is tapered out too, so it might not be a problem. My "measurement" are for the leading edge. I think I could always sand .2 inches though, there's plenty of metal there.

Thanks!!!

-Jeff
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A Ravaged '77 924 (Electric Conversion in Progress)

Fuzzbeaner · Joined: 03 Dec 2003 Posts: 236 Location: Central MA

Hey, actually, anyone know how much larger the beginning of the hole is then the rest of the torque tube, and how deep that taper extends at what rate?

Thanks guys. I'm sure this is in some techincal guide somewhere...

-Jeff
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A Ravaged '77 924 (Electric Conversion in Progress)

Lizard · Posted: Mon Jul 12, 2004 12:11 pm Post subject:

the taper on the engien die of the torque tube is only about 1/4" into the shaft and that acts as a guide for the 3 pins which sit in the back side of the bellhousing
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3 928s,

kaffine · Joined: 13 Jun 2003 Posts: 644 Location: Las Vegas

I came up with 3.02 to 3.03 inches after the taper.
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80 924
80 931

The best desciption of an atom boils down to something unknown is doing we don't know what.
Sir Arthur Eddington

Fuzzbeaner · Joined: 03 Dec 2003 Posts: 236 Location: Central MA

Ok, thanks a bunch folks.

Looks like this 3 mm protruding cylinder on the motor is 3.25 inches, so I'll have to do about a bit more then a 1/4 inch of sanding a very short way to make this fit. Still, this is going to work out great...

...I think!

-Jeff
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A Ravaged '77 924 (Electric Conversion in Progress)

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

Mr. Fuzzbeaner,

I want to be the first to ride in your electric car. How near are you to Hartford?
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"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

Fuzzbeaner · Joined: 03 Dec 2003 Posts: 236 Location: Central MA

Vince, you are welcome to man, once I get this thing running I won't be able to stop showing off!

Hartford is just a short ride, it's only about 45 minutes away. Infact, as we speak my Grandmother is visiting from there. Hell, she made it here at 40 Mph in her giant Caddy!

-Jeff
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A Ravaged '77 924 (Electric Conversion in Progress)