Help on 17" back space - Team Camaro Tech
Wheels & Tires What fits what?

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post #1 of 16 (permalink) Old Mar 21st, 04, 11:09 AM Thread Starter
 
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I have racked my brain trying to decide on which offset to pick for my rims. I have searched till I'm blue in the face, and come up with different offsets everytime.

I have a '67 Camaro that will soon have a Hotchkis suspension all around and an SSBC front disc conversion on the front. I am wanting to put 17x7 w/235/45(f) and 17x8 w/255/45(r). What is the best back space I need to get with this setup?
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post #2 of 16 (permalink) Old Mar 21st, 04, 01:58 PM
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Front 7" 4.25"
Rear 8" 4.75"

Chevy HP says the max is:
Front 17 inch wheel, 5.00 backspace, 8.5in width, 245/40 tire
Rear 17 inch wheel, 5.50 backspace, 9.5in width, 275/40 tire

Thus for a 1.5" less rim and to keep it centered the same, you
minus .75 from backspacing to get 4.25" and 4.75"

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

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post #3 of 16 (permalink) Old Mar 21st, 04, 02:22 PM
 
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Those are the specs I am using exactly on this car. The 4.25" and 4.75" that is.

[img]http://www.msnusers.com/_Secure/0WwAAAHMcNS4t97M*nOQpoEZMcfiMcGgeWqC!isgPAavDlBKw6 4EoCLiaqvOgzcYTzHZGHqs11cpULK7dgReDadDXcQzo5u7esbe Ac8HdszMnuiQPF5LLVqklo!NNJ1MrIrzPF3P8D*0/vintage%20air%20141.jpg?dc=4675452397512737163[/img]
[img]http://www.msnusers.com/_Secure/0XAAAAKcc90It97M*nOQpoEZMcfiMcGgeMNbLYIvo9wMyG1QHc 89bav44ZNE0UOwo9QBHfJw6i8TbjijGcx5E9j0iYoekf31INij AaZcV8u0Mv9pbOcGv6Z9bZc2JTWXecw!LacrRNv8/vintage%20air%201450.jpg?dc=4675452397515170978[/img]
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post #4 of 16 (permalink) Old Mar 21st, 04, 04:11 PM Thread Starter
 
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Brian, thank you for explaining that the way you did. [img]smile.gif[/img] That helps alot.

sherr20, I've read some of your topics about your car. I love the way it looks [img]graemlins/thumbsup.gif[/img] because mine is butternut w/black vinal top also.
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post #5 of 16 (permalink) Old Mar 21st, 04, 04:12 PM
 
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Try calling Kyle Tucker at Detriot Speed & Engineering. I think the web site in www.detroitspeed.com. He helped me with my camaro. I have DSE tubular uppers and Global west tubular lowers with an older SSBC drum to disk conversion kit. I have no problems. Here is my info:
Budnik Famosa Standard Wheels
Front 17x8 w/ 4.87" BS & 1/2" mounting pad
Rear 17x8 w/ 4.75" BS & 1/2" mounting pad
Hope this helps
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post #6 of 16 (permalink) Old Mar 21st, 04, 04:14 PM
 
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Try calling Kyle Tucker at Detriot Speed & Engineering. I think the web site in www.detroitspeed.com. He helped me with my camaro. I have DSE tubular uppers and Global west tubular lowers with an older SSBC drum to disk conversion kit. I have no problems. Here is my info:
Budnik Famosa Standard Wheels
Front 17x8 w/ 4.87" BS & 1/2" mounting pad
Rear 17x8 w/ 4.75" BS & 1/2" mounting pad
Hope this helps
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post #7 of 16 (permalink) Old Mar 21st, 04, 04:21 PM Thread Starter
 
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Scott, what do you mean by 1/2" mounting pad? Sorry if this is a stupid question. [img]graemlins/clonk.gif[/img]
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post #8 of 16 (permalink) Old Mar 21st, 04, 05:26 PM
 
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No, not a stupid question at all.

I wanna know too?? Is it just a 1/2" spacer??

pdq67



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post #9 of 16 (permalink) Old Mar 23rd, 04, 01:57 AM
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Hey 68Rag,
I have Budnik's on the way and I remember them saying something about their mounting pad being 1 inch? What does this mean exactly because I ordered 17x8 4.75bs for front 17x9.5 5.5bs rear and I hope this pad dosen't change things. [img]graemlins/clonk.gif[/img]

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post #10 of 16 (permalink) Old Mar 23rd, 04, 03:06 AM
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Mounting pad is irrelavent. Backspacing is always measured the same. From the wheel mounting surface, to the edge of the wheel.

Lets not make this even more confusing, .
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post #11 of 16 (permalink) Old Mar 23rd, 04, 05:12 AM
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Pad thickness can be very important if you have aftermarket brakes or 4th gen LT1/LS1, C4/C5 converted big brakes. This pic shows a C5 rotor and caliper template on a ***Edit: 17x8" 4.75" bs Budnik, you can see any less pad could cause clearence issues...



[ 03-26-2004, 05:41 AM: Message edited by: DjD ]

...Dennis

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post #12 of 16 (permalink) Old Mar 23rd, 04, 09:33 AM
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Well that wasn't the issue in question. [img]tongue.gif[/img]

I think most wheels have at least that much of a pad, my Intros had a bunch.
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post #13 of 16 (permalink) Old Mar 26th, 04, 02:25 AM
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This pic shows a C5 rotor and caliper template on a 17x9.5" 5.5" bs Budnik

Dennis, Is that a front C5? Does that same template fit inside an 8" Budnik 4.75 bs? I ask cause I'm not sure which way to go C5 caliper/C4 rotor or C5/C5. Also is there a difference between the two rotors as in affecting backspacing compared to stock discs?

How is your brake upgrade going? [img]graemlins/beers.gif[/img]

Dean

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post #14 of 16 (permalink) Old Mar 26th, 04, 02:40 AM
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Dean, thanks for asking... My bad, that's my front 17x8 4.75 bs... [img]graemlins/clonk.gif[/img] Not all budniks are alike you might want to check out www.touring-classics.com and put their templets to use...

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post #15 of 16 (permalink) Old Mar 26th, 04, 02:58 AM
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Well if those are Anvil's and I know they are . Then I am lookin at my future(2 weeks) front wheel [img]graemlins/hurray.gif[/img] So, your brakes are you still doing them?

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