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Thread: Can I widen Fuchs wheels, do they have an alloy that allows welding?

  1. #1

    Can I widen Fuchs wheels, do they have an alloy that allows welding?

    I am thinking to run deep six on my -71 911 byt want 7" in rear as the 7r i believe they are called. Is the alloy of original Fuchs ok to weld?

    I can also consider a aftermarket 15x7 "Deep six" wheel if someone know which ones have the correct look.

    Regards
    Peter

  2. #2
    Yes... lots of people widen the 15x6 Fuchs...

    However, a flat 15x6 doesn't become a deep 15x7 once widened. The entire inch is added to the inside to get the 7R numbers...

  3. #3
    Ok, i was going to widen the inside of a deep six. So it is no special alloy? I need to know for the material added and what rod to use when welding it.

  4. #4
    Senior Member
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    You might consider asking Harvey Weidman. He has plenty of experience with this mod and seems more than willing to help with info. Quite the gentleman.

  5. #5
    Senior Member
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    Harvey did a great job widening my Deep 6 Fuchs wheels to the 7" 911R size.
    Bert Jayasekera
    1970 911T - Tangerine Orange
    Early 911S Registry #494
    R Gruppe #167

  6. #6
    Righteous Indignation 70SATMan's Avatar
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    Quote Originally Posted by Acekustom View Post
    Ok, i was going to widen the inside of a deep six. So it is no special alloy? I need to know for the material added and what rod to use when welding it.
    The alloy is 97 per cent aluminium. Small % of magnesium, silicon, manganese, titanium.
    Michael
    “Electricity is really just organized lightning”

    -Dusty 70S Coupe
    -S Registry #586

  7. #7
    Fuchs are weldable, Harvey did a a pair of 7Rs from deep 5 1/2" rims. I'd be wary of material content of aftermarket "Fuchs" replicas and their suitability for welding.

    Also, keeping rim true to axis of rotation is a task I'd be inclined to let someone with great experience do the work, this is an area of expertise developed over time. Pre-heat, root pass and back-gouging are to be considered to assure full penetration without occlusions. Perhaps developing an apparatus to rotate the wheel while maintaining pre-heat during machine welding would be good to consider. Selection of welding filler, shielding gas, rate of weld deposit and welder settings are worthy of ferreting out before striking the arc for keeps.

    A wobbly wheel or one that self-destructs while driving are to be avoided at all costs.
    Last edited by 1QuickS; 07-26-2023 at 07:33 PM.
    Paul Abbott
    Early S Member #18
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    www.PerformanceOriented.com
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  8. #8
    Thanks for the help.

  9. #9
    Senior Member StephenAcworth's Avatar
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    Very sound advice, Paul!

    Quote Originally Posted by 1QuickS View Post
    Fuchs are weldable, Harvey did a a pair of 7Rs from deep 5 1/2" rims. I'd be wary of material content of aftermarket "Fuchs" replicas and their suitability for welding.

    Also, keeping rim true to axis of rotation is a task I'd be inclined to let someone with great experience do the work, this is an area of expertise developed over time. Pre-heat, root pass and back-gouging are to be considered to assure full penetration without occlusions. Perhaps developing an apparatus to rotate the wheel while maintaining pre-heat during machine welding would be good to consider. Selection of welding filler, shielding gas, rate of weld deposit and welder settings are worthy of ferreting out before striking the arc for keeps.

    A wobbly wheel or one that self-destructs while driving are to be avoided at all costs.
    1966 911 Coupe - Slate Grey - 304598 - still in restoration!

    Member #1616

  10. #10
    Harvey created a set of flat 6 / 7R offset for me...they are incredible as is all of his work

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