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  #1 (permalink)  
Old July 19th, 2008, 11:40 AM
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Gn Backspacing
I'm looking for a set of drag wheels but I'm unsure on what backspacing to get. What is everyone running and what tire size?

I'd like to go as wide as I can with the stock rear and without the fender lips rolled.

Thanks
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Old July 19th, 2008, 07:20 PM
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I'm running 275/65R15 MT Drag Radials mounted on a set of 15x8 Centerlines with 4" backspacing. Fits good, up under the the body and about 3/4" off the frame. I do have airbags for the track. I haven't experienced any fender rub, but I am cautious of how I cross uneven pavement.
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Stock unopened long block with a few bolt-ons:
GT6152E, Mototron 60#, Alky Control, MAFT Gen2 with Extender Extreme and LC1 WB, hot wired Walbro, AFPR, Cartek FMIC, Tomka CAI, Terry Houston DP, ATR 3" single shot, PI 3200 L/U, RJC boost controller and power plate, Scanmaster, Direct Scan
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Old July 19th, 2008, 08:26 PM
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Quote:
Originally Posted by bad V6 View Post
I'm running 275/65R15 MT Drag Radials mounted on a set of 15x8 Centerlines with 4" backspacing. Fits good, up under the the body and about 3/4" off the frame. I do have airbags for the track. I haven't experienced any fender rub, but I am cautious of how I cross uneven pavement.
same for me. Weld wheels for the track with 4" BS and no rubbing.
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87GN GT6776bb, 206/206 roller, 60# inj, PTE Stock Loc. IC, Tranny built by B. Hofer, PTC 10" 2800 Conv, Turbotweak, 93 octane & Alkycontrol

No track times with new converter/engine combo...yet.
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Old July 19th, 2008, 11:08 PM
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15x8 3.5 bs no rubbing
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1987 Buick Grand National.BoostJunkie 30 over 109, Forged Pistons, 204/214 cam, BB.TE-60, 50# MSD Inj., Razors Progressive Alky kit, 24 Row Stretched Intercooler, Chrome THDP. LS-1 Maf ,Translator. Dynomax Ultraflow exhaust. Hotwired Walbro 340, Billit Regulator, Rjc valve and plate, BoostJunkie 200r4 with a 12 inch 2800 Stall, 93 Alky Tweak Chip. Vacuum Brakes with S-10n's, Alum. Brake Drums. Poly Body Mounts. Front/Rear Braces. New Front Suspension, Red UMI Tubular Rears. Crager Street Stars. Mickey Drags 275 60's. Rear Air Bags best ET ON TA-49 IS 11.62@114.00. 1.609 60' 25# of boost 27/24. 93 octane and alky 9# launch. Brian Roman

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Old July 20th, 2008, 12:26 AM
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I put on a set of ProStars, 15x8/3.5bs with 275/60's and I'm getting a tiny bit of rub on the outer drivers side from the inner fender lip on big bumps.
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Last edited by ChevMCarlo84 : July 20th, 2008 at 12:32 AM.
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Old July 20th, 2008, 02:36 PM
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Quote:
Originally Posted by ChevMCarlo84 View Post
I put on a set of ProStars, 15x8/3.5bs with 275/60's and I'm getting a tiny bit of rub on the outer drivers side from the inner fender lip on big bumps.
need air bags to cure that some cars rearend are not centered perfect
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1987 Buick Grand National.BoostJunkie 30 over 109, Forged Pistons, 204/214 cam, BB.TE-60, 50# MSD Inj., Razors Progressive Alky kit, 24 Row Stretched Intercooler, Chrome THDP. LS-1 Maf ,Translator. Dynomax Ultraflow exhaust. Hotwired Walbro 340, Billit Regulator, Rjc valve and plate, BoostJunkie 200r4 with a 12 inch 2800 Stall, 93 Alky Tweak Chip. Vacuum Brakes with S-10n's, Alum. Brake Drums. Poly Body Mounts. Front/Rear Braces. New Front Suspension, Red UMI Tubular Rears. Crager Street Stars. Mickey Drags 275 60's. Rear Air Bags best ET ON TA-49 IS 11.62@114.00. 1.609 60' 25# of boost 27/24. 93 octane and alky 9# launch. Brian Roman

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Old July 24th, 2008, 04:10 AM
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Quote:
Originally Posted by lpaulabbott View Post
need air bags to cure that some cars rearend are not centered perfect
Which I have. What do you have your bags inflated to?
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