Author Topic: Z/28 rear-end gearing  (Read 1536 times)

Flowjoe

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Z/28 rear-end gearing
« on: April 11, 2009, 06:12:07 PM »
Is there any evidence that a Z/28 was built using a gear ratio higher (numerically lower) than 3.73:1? 

This is not to prove that any particular car is genuine or anything like that.  It is a topic that came up in another forum discussion about what was possible  and if possible whether it ever happened.

Just to get it out of the way, I understand completely that a 302 (as built by GM) would not be a "happy camper" with, say, 3.07:1's.

william

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Re: Z/28 rear-end gearing
« Reply #1 on: April 11, 2009, 07:02:18 PM »
There are documented [window sticker, shipper copy] examples of 307, 331, 355.

77thor

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Re: Z/28 rear-end gearing
« Reply #2 on: April 11, 2009, 07:57:11 PM »
The way I understand it, is that the high-winding 302 is happiest with gear ratios even lower than 3.73 (say 4.10).
1969 Camaro SS350, M21, 12 Bolt, 01B LOS Build

Flowjoe

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Re: Z/28 rear-end gearing
« Reply #3 on: April 11, 2009, 08:05:45 PM »
There are documented [window sticker, shipper copy] examples of 307, 331, 355.

Thank you William - that answers the question nicely. :)

Flowjoe

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Re: Z/28 rear-end gearing
« Reply #4 on: April 11, 2009, 08:08:21 PM »
The way I understand it, is that the high-winding 302 is happiest with gear ratios even lower than 3.73 (say 4.10).

My '69 X-77 car had a 3.07:1 open in it for years (came to me that way in '84 - I never thought to question it for a long time - but not the original rear as it turned out)...it was a drag to drive under certain conditions (any stops on any slope ;))