For drag racing, 4.56.
For the street, 3.73 or higher
I have 3.89 gears in my 71 with a 28" tall rear tire. With a little torque
converter slip thrown in for good measure my tach reads real close to 3200
RPM @ 60 MPH. For anything other than driving to the local get together at
the McDonalds the gears are way too low.
Chevy used to put 4.11 gears together with small blocks and powerglides. The
cars would jump but couldn't get any gas mileage. GM did that because 1st
gear in a Powerglide is not much lower than 2nd in a Turbo 350 but high gear
is 1:1 just like the Turbo. To make the cars quick from a stop they used low
rear end gears and let the poor things rev in high gear. You have to
remember, gas was only around 30 cents a gallon back when they built those
combinations and not many people really cared about gas mileage.
My opinion, for what it's worth, is go 3.73s or higher.
Bill Vander Werf
----- Original Message -----
From: "J. Brady" <[EMAIL PROTECTED]>
To: "Chevelle Group" <[email protected]>
Sent: Monday, November 28, 2005 4:24 PM
Subject: [Chevelle-list] 3.73 or 4.56?
OK folks,
I have the opportunity to use 3.73 or 4.56 gears in
the 10-bolt posi I'm going to put in the '66. The car
has a 300+/-HP 327 and PG. Anyone have any thoughts
or previous experience with the 4.56 gears and the
PG/small block setup?
I drive the car to local shows, and want to be able to
take it to Cecil on occasion. A relative told me to
do the 4.56s and nothing less, thus my indecision.
Thanks,
Jim
__________________________________
Yahoo! Mail - PC Magazine Editors' Choice 2005
http://mail.yahoo.com
