Backspacing

hotrods1795 · 02-11-2014, 06:54 PM

Does anyone know the backspacing on a 1963 Dodge Polara - stock eliminator car for a 10 inch wheel. I have an 8 in wheel now. The car has cal-tracs. Any help would be appreciated.

John Dinkel · 02-12-2014, 10:49 AM

I have 5 in on my 64 Plymouth

Run to Rund · 02-12-2014, 12:58 PM

If your current 8" wheel puts the tire where you want it, add 1" to its backspacing.

Run to Rund · 02-12-2014, 01:02 PM

One other thing, the section width of the tire will probably increase a little, about .3" in and .3" out at the sidewalls, with the wider wheel.

John Dinkel · 02-12-2014, 01:22 PM

You might have to bend the inner lip of the wheel opening too.

hotrods1795 · 02-12-2014, 06:13 PM

Thanks for all the info - really appreciate it.

Alex Denysenko · 02-13-2014, 03:47 PM

we sold the force 5 bogarts to Dave Young for his 63 and Gene Mosbeck for his 64 and I'M pretty sure John Dinkle as well they were all 15X 10 and had a 5 inch BS.

GTX JOHN · 02-14-2014, 06:25 AM

I had 10 inch with 4 1/2 BS 64 Ply. With 65 rear end with no Key axles.
Wider/ Later Rear End will require more BS. What year rear end are you
using and what width and I can tell you more exactly?

Most everybody who ran these cars replaced the weak and difficult to remove
Keyed axles with a later model rear. Many years had the same spring perch
width ( about 44 inches ) but differing widths of housings affecting the back spacing
choice.

You should have some leeway because we used to run 10.5 width in SS without any
mods except wheel lip.

hotrods1795 · 02-14-2014, 06:24 PM

I bought the car out of Mass. and I don't really know what year rear is in the car, but I do have an 8" rim on the car now w/4 1/2' bs on the car now.

02-11-2014, 06:54 PM	#1
hotrods1795 Junior Member Join Date: Dec 2007 Posts: 38 Likes: 0 Liked 2 Times in 2 Posts	Backspacing Does anyone know the backspacing on a 1963 Dodge Polara - stock eliminator car for a 10 inch wheel. I have an 8 in wheel now. The car has cal-tracs. Any help would be appreciated.

02-12-2014, 10:49 AM	#2
John Dinkel Senior Member Join Date: Nov 2005 Location: Pinckney, Michigan Posts: 507 Likes: 399 Liked 263 Times in 68 Posts	Re: Backspacing I have 5 in on my 64 Plymouth __________________ John Dinkel 3295 STK

02-12-2014, 12:58 PM	#3
Run to Rund Senior Member Join Date: Sep 2007 Location: Henderson, NV Posts: 583 Likes: 8 Liked 54 Times in 27 Posts	Re: Backspacing If your current 8" wheel puts the tire where you want it, add 1" to its backspacing.

02-12-2014, 01:02 PM	#4
Run to Rund Senior Member Join Date: Sep 2007 Location: Henderson, NV Posts: 583 Likes: 8 Liked 54 Times in 27 Posts	Re: Backspacing One other thing, the section width of the tire will probably increase a little, about .3" in and .3" out at the sidewalls, with the wider wheel.

02-12-2014, 01:22 PM	#5
John Dinkel Senior Member Join Date: Nov 2005 Location: Pinckney, Michigan Posts: 507 Likes: 399 Liked 263 Times in 68 Posts	Re: Backspacing You might have to bend the inner lip of the wheel opening too. __________________ John Dinkel 3295 STK

02-12-2014, 06:13 PM	#6
hotrods1795 Junior Member Join Date: Dec 2007 Posts: 38 Likes: 0 Liked 2 Times in 2 Posts	Re: Backspacing Thanks for all the info - really appreciate it.

02-13-2014, 03:47 PM	#7
Alex Denysenko Senior Member Join Date: Jan 2002 Location: Michigan City IN Posts: 633 Likes: 0 Liked 4 Times in 3 Posts	Re: Backspacing we sold the force 5 bogarts to Dave Young for his 63 and Gene Mosbeck for his 64 and I'M pretty sure John Dinkle as well they were all 15X 10 and had a 5 inch BS. __________________ Alex Denysenko NHRA 3038 SS, 3305 STK - IHRA 6 SS, 330A STK Moneymaker Racing LaPorte Indiana 219-861-1214 www.moneymakerracing.net

02-14-2014, 06:25 AM	#8
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,802 Liked 2,486 Times in 697 Posts	Re: Backspacing I had 10 inch with 4 1/2 BS 64 Ply. With 65 rear end with no Key axles. Wider/ Later Rear End will require more BS. What year rear end are you using and what width and I can tell you more exactly? Most everybody who ran these cars replaced the weak and difficult to remove Keyed axles with a later model rear. Many years had the same spring perch width ( about 44 inches ) but differing widths of housings affecting the back spacing choice. You should have some leeway because we used to run 10.5 width in SS without any mods except wheel lip. __________________ John Irving 741 Stock 741 Super Stock Last edited by GTX JOHN; 02-14-2014 at 06:21 PM.

02-14-2014, 06:24 PM	#9
hotrods1795 Junior Member Join Date: Dec 2007 Posts: 38 Likes: 0 Liked 2 Times in 2 Posts	Re: Backspacing I bought the car out of Mass. and I don't really know what year rear is in the car, but I do have an 8" rim on the car now w/4 1/2' bs on the car now.