Author Topic: Z/28 rear-end gearing  (Read 1810 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 SS, 350(NOM), M21, 12 Bolt Posi, 01B LOS Build
1977 Camaro, 350(LM1), M20, 10 Bolt Posi, Purchased New, (SOLD)

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 ;))