Aubrey's 62 409 goes 11.067 in C/S

RJ · 05-26-2009, 08:41 PM

Cool ride Aubrey, good to see it coming around. Ever think about underdriving high gear in the Jerico? - you could put in a taller (read stronger) ring & pinion and get the same total ratio.

Alan Roehrich · 05-26-2009, 09:03 PM

I have to wonder. If it is legal and acceptable to put a 12 bolt in place of a 10 bolt, even when the 12 bolt was never an option, would it not be legal to put a 12 bolt in an older big car?

bill dedman · 05-26-2009, 09:32 PM

That's a REALLY good question....

Mark Yacavone · 05-26-2009, 10:24 PM

Quote:

Originally Posted by Alan Roehrich

I have to wonder. If it is legal and acceptable to put a 12 bolt in place of a 10 bolt, even when the 12 bolt was never an option, would it not be legal to put a 12 bolt in an older big car?

Sure it would be. Chevy passenger car rear in a Chevy passenger car. I'm sure the 66 Impala 12 bolt is already wide enough.

Aubrey N Bruneau · 05-26-2009, 11:20 PM

Yes, I could run a 12 bolt. The 65-up unit is a couple inches wider, so it would have to be shortened some.
I really never thought this thing would make this much power, or hook the way it did. I went through considerable effort and expense, to retain the original rear ( been doing and marketing this package for almost 20 years... never broke one ). Being a coil spring car, with very unique brackets, it concerns me that the geometry for the mounting hardware on the housing, would be virtually impossible to locate as accurately as that on the original housing.

A transmission with a "reduction" top gear, could help me get into a 4.56 rear gear, which is far more available, and a bit stronger. However, to my knowledge, there never has been a "pro gear" ( 9310 ) material for these rear ends.
Which is why I contacted Richmond today !
I'll be &$#ed.... they'll do me some 5.13's in a 9310 material !
one catch
I have to buy 25 sets !
I'd buy 5 sets maybe

Alan Roehrich · 05-26-2009, 11:31 PM

It would not be hard at all to put the brackets on a 12 bolt correctly, honestly, the geometry is not all that complicated. The 12 bolt would be cheaper, faster, and more reliable. It just would not be as cool.

I seriously doubt there is a cost effective way to keep the original rear end in the car and have it be reliable. Much as I'd like to see it work, it would be pretty cool.

treessavoy · 05-27-2009, 10:21 AM

I agree with Alan.

Any chassis shop can set up the correct angles for the 12 bolt in your car.

You might get in contact with some of the rear end builders...strange, moser, dts, or Randy at www.ringandpinion.com, perhaps one of them can help you.

Keep her running.

Jim

Aubrey N Bruneau · 05-27-2009, 01:56 PM

As usual... excellent points and suggestions.

There is apparently, a simple 12 bolt conversion available. I just don't like conventional 10/12 bolts, what with their need for "c clip eliminators", ect. A person still needs a spool, axles, cap supports... and those elusive ( to me ) 9310 "pro gears".
My beautiful disc brake adaptors turned out so nice, that I just can't abandon them yet !

05-26-2009, 08:41 PM	#1
RJ Member Join Date: Oct 2002 Posts: 248 Likes: 0 Liked 0 Times in 0 Posts	Re: Aubrey's 62 409 goes 11.067 in C/S Cool ride Aubrey, good to see it coming around. Ever think about underdriving high gear in the Jerico? - you could put in a taller (read stronger) ring & pinion and get the same total ratio.

05-26-2009, 09:03 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,126 Likes: 1,583 Liked 1,893 Times in 423 Posts	Re: Aubrey's 62 409 goes 11.067 in C/S I have to wonder. If it is legal and acceptable to put a 12 bolt in place of a 10 bolt, even when the 12 bolt was never an option, would it not be legal to put a 12 bolt in an older big car? __________________ Alan Roehrich 212A G/S

05-26-2009, 09:32 PM	#3
bill dedman VIP Member Join Date: Feb 2002 Location: Conway, AR Posts: 1,739 Likes: 0 Liked 6 Times in 4 Posts	Re: Aubrey's 62 409 goes 11.067 in C/S That's a REALLY good question.... __________________ Bill

05-26-2009, 11:20 PM	#5
Aubrey N Bruneau Member Join Date: Sep 2003 Location: South Eastern Alberta, Canada Posts: 311 Likes: 6 Liked 7 Times in 3 Posts	Re: Aubrey's 62 409 goes 11.067 in C/S Yes, I could run a 12 bolt. The 65-up unit is a couple inches wider, so it would have to be shortened some. I really never thought this thing would make this much power, or hook the way it did. I went through considerable effort and expense, to retain the original rear ( been doing and marketing this package for almost 20 years... never broke one ). Being a coil spring car, with very unique brackets, it concerns me that the geometry for the mounting hardware on the housing, would be virtually impossible to locate as accurately as that on the original housing. A transmission with a "reduction" top gear, could help me get into a 4.56 rear gear, which is far more available, and a bit stronger. However, to my knowledge, there never has been a "pro gear" ( 9310 ) material for these rear ends. Which is why I contacted Richmond today ! I'll be &$#ed.... they'll do me some 5.13's in a 9310 material ! one catch I have to buy 25 sets ! I'd buy 5 sets maybe __________________ Aubrey N Bruneau 6409 C/S 62 BelAir sport coupe, 409 HP 409

05-26-2009, 11:31 PM	#6
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,126 Likes: 1,583 Liked 1,893 Times in 423 Posts	Re: Aubrey's 62 409 goes 11.067 in C/S It would not be hard at all to put the brackets on a 12 bolt correctly, honestly, the geometry is not all that complicated. The 12 bolt would be cheaper, faster, and more reliable. It just would not be as cool. I seriously doubt there is a cost effective way to keep the original rear end in the car and have it be reliable. Much as I'd like to see it work, it would be pretty cool. __________________ Alan Roehrich 212A G/S

05-27-2009, 10:21 AM	#7
treessavoy VIP Member Join Date: Feb 2009 Location: Dunnellon,FL Posts: 1,103 Likes: 0 Liked 4 Times in 4 Posts	Re: Aubrey's 62 409 goes 11.067 in C/S I agree with Alan. Any chassis shop can set up the correct angles for the 12 bolt in your car. You might get in contact with some of the rear end builders...strange, moser, dts, or Randy at www.ringandpinion.com, perhaps one of them can help you. Keep her running. Jim

05-27-2009, 01:56 PM	#8
Aubrey N Bruneau Member Join Date: Sep 2003 Location: South Eastern Alberta, Canada Posts: 311 Likes: 6 Liked 7 Times in 3 Posts	Re: Aubrey's 62 409 goes 11.067 in C/S As usual... excellent points and suggestions. There is apparently, a simple 12 bolt conversion available. I just don't like conventional 10/12 bolts, what with their need for "c clip eliminators", ect. A person still needs a spool, axles, cap supports... and those elusive ( to me ) 9310 "pro gears". My beautiful disc brake adaptors turned out so nice, that I just can't abandon them yet ! Attached Images __________________ Aubrey N Bruneau 6409 C/S 62 BelAir sport coupe, 409 HP 409