how to determine backspacing? - Team Camaro Tech
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post #1 of 8 (permalink) Old Mar 27th, 11, 05:20 PM Thread Starter
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Steven
 
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how to determine backspacing?

hello. when im ready to buy new rims and tires, i would like an 18" rim with a deep lip but dont want the tires to stick out of the fenderwell. i have the prodigy 4-link and jason rushforth suggested an 18"x10" wide rim with a 5.75 back spacing but that was when i had the stock leafs. so i would like to dive in and take some of my own measurements.

here are some pics

thank you for any input!!

Steven
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69 Frost Green Camaro
LS3 with TSP stage 3 cam
Tremec TKO 600
Moser 12 bolt rear with ford ends 3.73:1 Eaton tru trac differential
Speedtech pro touring subframe
Ridetech rear 4-Link


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post #2 of 8 (permalink) Old Mar 28th, 11, 04:14 AM
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Tim
 
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Re: how to determine backspacing?

Steven,
Try this link - it's an Aussie site, can't help promoting home-grown

http://www.rsmotorsport.com.au/techn...wheel_info.pdf

I found this a while ago and it has a lot of useful info on it, so hope this is of use to you.
Your car is looking really good with that 4-link!!
Cheers Tim

1969 04A Van Nuys-built Z/28. Cortez Silver with dark blue interior and VE3. Sold Clippinger Chevrolet. Raced at Lions in LA.
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post #3 of 8 (permalink) Old Mar 28th, 11, 04:40 AM
DjD
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Re: how to determine backspacing?

Same info has been available from this US site for years... https://www.rsracing.com/tech-wheel.html

...Dennis

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post #4 of 8 (permalink) Old Mar 28th, 11, 06:57 AM
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Greg
 
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Re: how to determine backspacing?

Since your leaf's are gone and shocks are inboard, now is a good time for mini tubs.......

1969 RS/SS Vert

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post #5 of 8 (permalink) Old Mar 28th, 11, 05:10 PM
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Tim
 
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Re: how to determine backspacing?

Quote:
Originally Posted by DjD View Post
Same info has been available from this US site for years... https://www.rsracing.com/tech-wheel.html
Hmm - chicken or egg scenario? Looks like your link is probably the original source, so chalk one up to the US! Anyway, hope it helps Steven determine what wheels to go with. Cheers - Tim

1969 04A Van Nuys-built Z/28. Cortez Silver with dark blue interior and VE3. Sold Clippinger Chevrolet. Raced at Lions in LA.
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post #6 of 8 (permalink) Old Mar 28th, 11, 06:47 PM
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joseph l clance
 
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Re: how to determine backspacing?

i run rushforth 18X10's with 5.5" backspacing and leaf springs. the spring is not the limimting factor, it the inner wheel well. i have 3/4" to the innerwell at its closest pointat 5.5" backspacing. i would hesitate to go any further inboard without mini tubbing.

you can get more of a deep dish @5.5" of backspacing if you tell Jason to hold the pad width to one inch. The thinner the pad, the more outer rim is exposed. a thick pad forces him to move the center piece out to maintain the backspacing.

joe c

69 X-44 base coupe, ZZ4, 16lb nodular flywheel, Center force DF clutch + PP, Holley 600DP, Hooker super comp 1 3/4 ceramics, 2.5" dual exhaust w/ X-pipe, flowmaster 40 series mufflers.
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post #7 of 8 (permalink) Old Mar 28th, 11, 08:37 PM Thread Starter
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Steven
 
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Re: how to determine backspacing?

thanks Dennis, I totally missed that sticky. Joe, thats great info. i just dont want the tire to hit the wheel well lip as the 4-link does lower the rear 3". i just want to be sure before i drop mega millions on new rims and tires. and i better start doin the math now even tho im about a year away from getting them

69 Frost Green Camaro
LS3 with TSP stage 3 cam
Tremec TKO 600
Moser 12 bolt rear with ford ends 3.73:1 Eaton tru trac differential
Speedtech pro touring subframe
Ridetech rear 4-Link


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post #8 of 8 (permalink) Old Mar 28th, 11, 09:04 PM
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Re: how to determine backspacing?

three inches of drop is gonna be tough at 10" width. i had to bend the heck out my outer wheelwell and lip to get 10 X 18 @5.5b/s with 285-35-18 at two inches of drop.

if your in the sheet-metal stage, i'd cut/mini tubb-it! then you could go 11+" wide and put it wherever you want.

69 X-44 base coupe, ZZ4, 16lb nodular flywheel, Center force DF clutch + PP, Holley 600DP, Hooker super comp 1 3/4 ceramics, 2.5" dual exhaust w/ X-pipe, flowmaster 40 series mufflers.
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