Width of rearend needed/Please Help me - Team Camaro Tech
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post #1 of 7 (permalink) Old Jan 17th, 01, 09:10 AM Thread Starter
 
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If I want to put 17x9.5 and 17x11 rims on my 67 camaro Like Stielow Did on his 67 red witch what do I need to do? I have the following options to put on. The ZR-1 style rims are available in the following
sizes:

17x9.5 +56mm 7.4 inch
17x9.5 +38mm 6.7 inch
17x11 +50mm 7.93 inch
17x11 +36.5mm 7.397 inch

If I run 275x40x17 and 315x35x17. Will the rearend be stock width? Thanks in advance for your time.

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post #2 of 7 (permalink) Old Jan 17th, 01, 09:15 AM
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Not too sure about the wheel backspacing as i currently forgot my metric conversions. Stick with the 9.5 in wheel. The 11 inch would probably require quite a bit of wheel well massaging to prevent tire rub. Even with 9.5's you may need to roll the inner fender lip and do a little banging with a hammer on the inner fenderwells. Go with the 275 width tire too. In order to fit a 315 youd have to either have the tire hanging outside of the fender(ugly) or mini tub the rear end. Hope this helps.
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post #3 of 7 (permalink) Old Jan 17th, 01, 04:43 PM
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Bret
 
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Running that size wheel/tire combo will require mini-tubbing, relocation of the rear springs and shocks and modification/replacement of the fuel tank. If you are ready to tackle all of that, then to run that much backspacing will require either spacers or a rear end that has been made wider than stock. If you do go through all of this work, I'd suggest buying the wheels with the backspacing you prefer and building the rear end the appropriate length to fill in the gap between the wheels over using spacers.

Another route would be to order a set of wheels with a custom offset. Several companies offer a 17x11" wheel with a backspacing range of say 4-7.5 inches; some include Colorado Custom and American Racing. That would remove the requirement for a new rear end/spacers. Sorry I don't have an exact length for the rear end, but I hope this does help some.

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Bret Copsey
'68 Camaro base coupe
'92 Caprice wagon
'98 Malibu
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post #4 of 7 (permalink) Old Jan 17th, 01, 05:07 PM
DjD
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Gotta start using the search feature guys. Check out the thread below and then blast over to RaceHome.com!! Tony is a full blown pro-touring car guy and puts a lot of effort into his site... Also look for a link to pro-touring.com when you're there... You want to run 17X9.5's up front? I know Tony has 17X8.5's on his and will be fabing his own inner fenders... Well take a look see for yourself.

https://www.camaros.net/forum/Forum1/HTML/003301.html

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...Dennis
The Cars:
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'96 Z28SS #1679 of 2410
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post #5 of 7 (permalink) Old Jan 17th, 01, 05:12 PM
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Bret
 
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Ok Dennis, you're starting to scare me.....knock it off!!

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'92 Caprice wagon
'98 Malibu
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post #6 of 7 (permalink) Old Jan 17th, 01, 05:40 PM
DjD
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BOO!!!
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post #7 of 7 (permalink) Old Feb 9th, 01, 08:01 AM
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Bret
 
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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
you
> 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
would
> 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
see
> 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
to
> one side by an inch or so. Thanks once again in advance for your
response.
> I know you two must be extremely busy with starting up your business.
>
> Bret Copsey
>

Brett,

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
wheel.

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.


------------------
Bret Copsey
'68 Camaro base coupe
'92 Caprice wagon
'98 Malibu
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