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Forum: Suspension

June 5th 2009, 11:31

Replies: 30

Dimensions for 944 hub machining

Views: 9,078

Posted By wrljet

Also, the Porsche specs (996) are set for the car...

Also, the Porsche specs (996) are set for the car going 175 MPH.

I just checked a recent Chrysler book and they spec 0.08mm lateral at the hub.
That's almost 3 times what Porsche wants. And...

Forum: Suspension

June 5th 2009, 11:23

Replies: 30

Dimensions for 944 hub machining

Views: 9,078

Posted By wrljet

I'm a hobbyist machinist and 0.01mm is accuracy I...

I'm a hobbyist machinist and 0.01mm is accuracy I can only read about, not something I achieve. ;-)

FWIW, I just looked up the Porsche specs for runout in the 996 Workshop Manual.

Lateral...

Forum: Suspension

June 5th 2009, 10:51

Replies: 30

Dimensions for 944 hub machining

Views: 9,078

Posted By wrljet

If I understand the mods to the hub, the overall...

If I understand the mods to the hub, the overall runout of the entire system will be a function only of the accuracy of the new bearing spacers (and of course the original parts' accuracy).

Very...

Forum: Suspension

June 5th 2009, 10:35

Replies: 30

Dimensions for 944 hub machining

Views: 9,078

Posted By wrljet

A normal 3-jaw chuck only centers a part to...

A normal 3-jaw chuck only centers a part to within a few thousandths.
(of course some are better and some do have adjustable centering)

Say you check a bar and turn it round. Remove it and put...

Forum: Suspension

June 5th 2009, 10:08

Replies: 30

Dimensions for 944 hub machining

Views: 9,078

Posted By wrljet

Chris, How do you get repeatable centering...

Chris,

How do you get repeatable centering with that fixture held in a 3-jaw chuck?
(or is accuracy beyond the 3-jaw not an issue for the machining required on the hubs?)

Bill

Forum: Transmissions

March 7th 2007, 19:16

Replies: 23

914/11 into beetle

Views: 5,439

Posted By wrljet

I scanned a few pages from a 911 manual and put...

I scanned a few pages from a 911 manual and put 'em on the web for anyone who would like to see it. All I had at hand was for the 915 tranny, but you can see the main idea. It's non-trivial and...

Forum: Transmissions

March 7th 2007, 14:30

Replies: 23

914/11 into beetle

Views: 5,439

Posted By wrljet

You skipped the critical part -- setting the...

You skipped the critical part -- setting the backlash, pinion depth, etc.

Bill

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