LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Weld wheels backspacing for fbodies?

Old 03-03-2009, 11:05 PM
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Default Weld wheels backspacing for fbodies?

Whats the backspacing for our cars for an 8in wheel and for a 10in? (15x8 and15x10)

Also, what's our bolt pattern? =P

much appreciated
Old 03-03-2009, 11:06 PM
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u'd think with > 1,000 posts that you would have figured out the search function by now.
Old 03-03-2009, 11:10 PM
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5.5 for 15x8 and 7.5 for 15x10

just going off memory though so I could be wrong
Old 03-03-2009, 11:11 PM
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searched and nothing came up. care to help?
Old 03-03-2009, 11:12 PM
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The search is not working properly. Every time I use it it brings up everything and anything but what I typed in...and I have tried various ways, combinations, etc. to no avail. So it probably isn't his fault that the search came up dry...
Old 03-03-2009, 11:13 PM
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mylt1won is correct.
Old 03-03-2009, 11:17 PM
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true that the search sections suck *** now something is wrong

MODS PLEASE FIX THE SEARCH SECTION, THANKS
Old 03-03-2009, 11:20 PM
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What about the front ones?
Old 03-04-2009, 06:06 AM
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most guys run the 1.75 BS on like a 15x4
Old 03-04-2009, 07:37 AM
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Bolt pattern is a 5x4.75"
Old 03-04-2009, 08:32 AM
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Much appreciated guys!
Old 03-04-2009, 08:41 AM
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Originally Posted by fergymoto
mylt1won is correct.
Agreed. it is actually easier if you know the name of who posted something about what you are looking for. then the actual subject content
Old 03-04-2009, 08:47 AM
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Has aynone ran a 4.75 backspacing on a 15x8? Would it stick out too much?
Old 03-04-2009, 09:14 AM
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Never heard of a 4.75 backspacing.
I've heard of a 4.5, and yea that'll stick bout an inch or so out of the fender.
Old 03-04-2009, 02:53 PM
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5.5 on my 15x8s and 1.75 on the 15x3.5, pic in sig
Old 03-04-2009, 03:28 PM
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15x8 with a 5.5 bs is close to factory as far as sticking out
Old 03-04-2009, 04:10 PM
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do some weld wheels require grinding even with the proper backspaces. i know the ones smokinlt1 has fit with no grinding.
Old 03-04-2009, 05:58 PM
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Originally Posted by C_Rules
do some weld wheels require grinding even with the proper backspaces. i know the ones smokinlt1 has fit with no grinding.
they require grinding, even the ones that smokinlt1 has you have to grind.

At minimum, you are going to have to grind your rears. If you have stock brakes up front, you shouldn't have to grind, but you will have to run a spacer iirc. If you have ls1 brakes up front, you will either have to grind a **** load, or grind a little bit and run a spacer.
Old 03-04-2009, 06:06 PM
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longer studs are recommeded if you use spacers

i know its for ls1 but it give you an idea
http://www.freewebs.com/casper9t9/dragwheelinfo.htm

Last edited by C5042081; 03-04-2009 at 06:32 PM.
Old 03-04-2009, 06:18 PM
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Bolt circle for the Weld rim is 4.75 inch

If you get 15X3.5 the backspacing is 1.75

You will have to grind down caliper cooling fin weather you use spacer or not. If you use spacer you grind less.
The brake pad thickness has a affect on the position of the caliper suggest replaceing the pads when you do the clearanceing.

I recommend getting ARP wheel studs 12mm X 1.5, 3.25"
http://www.thunderracing.com/catalog...vid=4&pcid=148

I had to get shank style lug nuts 12mm x 1.50 RH they come in open end and close end to run on the track you need open end.

Last edited by LT1; 03-04-2009 at 06:48 PM.

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