<VV> choosing rear end ratio

[RKAT]

I have heard of the 4 spyder diff. How does it work? What is it's
purpose?

Thanks!

Ron Tinkham
http://www.ronsjeepjunk.4t.com/
Pine Tree Corvairs (in the works)
66 Corsa Convertible, 140, 4sp
Maine

-----Original Message-----
From: virtualvairs-admin@corvair.org
[mailto:virtualvairs-admin@corvair.org] On Behalf Of Bill Elliott
Sent: Wednesday, December 01, 2004 6:28 PM
To: Neal; virtualvairs@corvair.org
Subject: Re: <VV> choosing rear end ratio

A 3.27 is an ideal ratio for a turbo. You lose a little on the low end,
but the midrange torque more than makes up for it.

You might consider having a 3.27 4 spyder diff built up for you. The
Vair Shop built one for me (for my yet-to-see -the-light-of-day turbo
project) and it was 
surprisingly inexpensive. Cheaper than a 2 syder posi... and you don't
need a posi anyway.

Some guys run even steeper 3.08's, but I think a 3.27 is plenty.

Bill


On Wed, 1 Dec 2004 18:08:41 -0500, Neal wrote:

>Hi, I'm currently working on a 66 Turbo convert. I'm in a position
where I can
>easily choose a rear ratio. I know that the stock ratio was a 3:55 to
1. Has
>anyone ever thrown a 3:27 into a turbo? Did it work OK? If I had
unlimited
>funds I would probably wrangle up one of those 5-speed conversion kits
but I
>believe they are in the over $2000 range. Just looking for input or any
other
>ideas. Thanks, Neal CPCC
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