Thought I would pass this along, it's an e-mail i sent to Kyle Tucker and his response
Detroit Speed And Engineering, Inc.
----- Original Message -----
From: "Copsey, Brett" <[email protected]
To: <[email protected]
Sent: Friday, January 19, 2001 12:30 PM
Subject: Twister Rear End Housing
> Once again I'm writing to bug you for more information. I was
> wondering if you could give me the "disc to disc" length of the rear end
> used. Also, what backspacing did you use for the 17"x11" wheels?
> I plan to use the same tire/wheel size combination on my '68 and it would
> really help to have a starting point to base my measurements from.
> I have considered having my 9" rear narrowed to stock width and
> basing the wheel backspacing from that, but I don't know how well that
> work or look. I'm sure you don't remember but I intend to use the offset
> rear spring shackles once you have them available-though I can't really
> what difference that will make in determining the rear end length-only the
> location of the spring perches. Am I correct?
> Lastly, this is the first rear end replacement I've done. I need to
> have the 9" housing set up so that the pinion yoke is centered in the car,
> correct? The way it came off the donor Lincoln the pinion yoke is offset
> one side by an inch or so. Thanks once again in advance for your
> I know you two must be extremely busy with starting up your business.
> Bret Copsey
Thanks for the e-mail, and sorry about the delayed response I am slowly
catching up on all the e-mail.
The Twister's rear axle housing was as follows: housing flange to housing
flange: 51.5"; axle flange to axle flange: 56.5"; add .300" on each side for
the disc rotor and that makes disc to disc about 57" total. You are right
you want to have the pinion centered in the car. I used an 11" wheel with
5.5" back spacing. I personally liked the look of the "deep-dish" rear
We will be making the offset shackles once our upper control arms are
complete. We do have the lower shock plates and adjustable spring pads for
the housing available.
Hope that all helps and let us know if we can help again.
The reason I asked him about the rear end pinion being centered in the car was that I thought it was something that was a "must". Not to say Tony doesn't know what he's doing, he's got a really nice car. But he indicated that he left the 9" rear end alone and that leaves the pinion offset by an inch or so. Anyhow, that's what Kyle and Stacey did with the Twister.
'68 Camaro base coupe
'92 Caprice wagon