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View Full Version : 67 Camaro - Backspacing Guru Help Needed



bigboi
07-07-2007, 09:12 AM
I need some help and advice from you guys...

Here is my scenario...

I have a 67 Camaro running stock suspension.

You can see pictures of my car at www.biigboii.com (http://www.biigboii.com/).

Here are my measurements...

Rear:
Drum brake mounting surface to inner wheel well - 5.75"
Drum brake mounting surface to fender lip - 5.25"
Total distance from wheel well to fender lip - 11"

Front:
Drum brake mounting surface to first obstruction - 5"
Note: This obstruction is very close to the backside of the drum brake.

Here is what I want to run...

Rear:
18x9.5 Billet Rally
275/40/18 BFG g-Force T/A KDW
Section Width on 9.5 wheel - 10.9"
Overall Diameter - 26.7"

Front:
18x8 Billet Rally
245/40/18 BFG g-Force T/A KDW
Section Width on 8.5 wheel - 9.6"
Overall Diameter - 25.7"

Backspacing Help...

Rear:
Since my mouting surface to wheel well is 5.75" what backspace should I go with? Many people have told me 5.5", but this would only leave .25" for tire bulge on the backside of the rim. This doesn't seem logical to me. Is there some other calculations or consideration I am missing?

I was thinking more of a 5.25" or even 5" to put the wheel in the center of the 11" opening.

Help???

Front:
I have been told to go with a 4.75" BS from another board member. The front is a little harder for me to determine because it doesn't seem as "cut and dry" as measuring the rear. Can any other Camaro owners help me with this?

Thanks Guys!!