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    original 15x6 to 15x8 ?

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    alusil850
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    original 15x6 to 15x8 ?

    Post  alusil850 on Thu Feb 22, 2018 2:27 pm

    hello,
    I will widening stock wheel,so same inside clearance but less ext clearance, somebody allready try 15x8 without contact with the fenders?
    or 15x10?
    also with what size of tire?

    I will modify stock for keeping dog dish, size like the gmbbodyforum.com capriceon top of this page look fine.
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    Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum on Fri Mar 02, 2018 2:47 pm

    15x10 fit no problem on the rears with a near 0 mm offset or about a 5.5in backspacing. Thanks, the photo is my caprice, but it has 15x7 all the way around currently. I think 15x8 should be standard for these cars and they fit perfectly also with a 0 mm offset, or 4.5in backspacing.



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    1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
    1984 Caprice Sedan, 305 motor, 700r4
    1978 Caprice Sedan, 305 motor, th350
    1993 L99 Caprice, 4.3 v8, 4l60 trans
    1972 Ford F-100, 302 windsor, c4 trans
    2001 BMW E46 330i, 3.0L
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    alusil850
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    Re: original 15x6 to 15x8 ?

    Post  alusil850 on Fri Mar 02, 2018 3:46 pm

    ok, on the banner your car have 15x7, but they look wide because they have biggest offset.
    I have stock 15x7 and they are really more inside the fenders.
    I found also stock 15x6 from a diesel caprice, I will cut them and add 3" at the exterior rim.
    I think I will be correct with 15x9 on 4 wheels, with 245/60R15 (or 255/70R15) on rear and 235/70R15 on front,sand blasted and glossy black, white letters tires and chrome dog dish.
    I hope they will have enough clearance.

    also I have a stock ring and pignon for gm 10 bolts taken from a blazer k5, 3.5x/1, will it be better than the stock 2.5x/1 and will be street driveable behind a th350c ?
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    Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum on Fri Mar 02, 2018 3:53 pm

    My wheels have a 0mm offset or 4inch backspace, the tires are 235/70R15 all the way around 28inches tall. Now as far as the ring and pinion goes, I have a 3.90 gear ratio with a th350 it rpms high, I had a 3.08 and the original 2.41 and I'd say the 3.08 was better for everyday driving

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    1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
    1984 Caprice Sedan, 305 motor, 700r4
    1978 Caprice Sedan, 305 motor, th350
    1993 L99 Caprice, 4.3 v8, 4l60 trans
    1972 Ford F-100, 302 windsor, c4 trans
    2001 BMW E46 330i, 3.0L
    avatar
    alusil850
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    Re: original 15x6 to 15x8 ?

    Post  alusil850 on Fri Mar 02, 2018 3:57 pm

    thanks!


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    77 caprice complete rebuild in progress
    98 dodge D on 35"
    cad SRX
    Audi S8D2
    ...
    and seaching for new chrome on the plastic grille of the 77.
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    Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum on Fri Mar 02, 2018 4:00 pm

    No problem!!

    Sent from Topic'it App


    _________________
    1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
    1984 Caprice Sedan, 305 motor, 700r4
    1978 Caprice Sedan, 305 motor, th350
    1993 L99 Caprice, 4.3 v8, 4l60 trans
    1972 Ford F-100, 302 windsor, c4 trans
    2001 BMW E46 330i, 3.0L
    avatar
    alusil850
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    Junior Member

    Posts : 12
    Join date : 2015-07-23

    Re: original 15x6 to 15x8 ?

    Post  alusil850 on Sun Mar 11, 2018 12:28 pm

    so I widening the wheels, cutting the 15x6, and welding ring, becoming 15x9.5 for rear and 15x8.5 for front, I choose 255/70R15 for rear and 245/60R15 for front.
    I think nothing will not touch fenders.


    _________________
    77 caprice complete rebuild in progress
    98 dodge D on 35"
    cad SRX
    Audi S8D2
    ...
    and seaching for new chrome on the plastic grille of the 77.
    avatar
    GM B-Body Forum
    Admin

    Posts : 740
    Join date : 2013-01-14
    Age : 25
    Location : Flint/Detroit, MI - Charlotte, NC

    Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum on Sat Mar 17, 2018 10:52 pm

    Nope they shouldnt touch at all!

    Sent from Topic'it App


    _________________
    1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
    1984 Caprice Sedan, 305 motor, 700r4
    1978 Caprice Sedan, 305 motor, th350
    1993 L99 Caprice, 4.3 v8, 4l60 trans
    1972 Ford F-100, 302 windsor, c4 trans
    2001 BMW E46 330i, 3.0L

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    Re: original 15x6 to 15x8 ?

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