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8 lug to 6 lug adapters found!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by **DONOTDELETE**, Mar 4, 2001.

    I was looking through the back of trucking and found this company,the ad in the mag says they make 10-8,8-6,6-5,
    whatever you need they have an adapter for it.
    Here's the web site www.motorsport-tech.com
     
  1. SAVAGE1

    SAVAGE1 1/2 ton status

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    <A target="_blank" HREF=http://www.motorsport-tech.com>http://www.motorsport-tech.com</A>
     
  2. Blue85b

    Blue85b Registered Member

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    Did you get a price from them? They list $650 on their web site, assumedly for a set of 4 adapters. You could have your axles converted for that kind of money. For swapping an 8-lug rear end in, it should be half of that ($325?) to convert if back to 6-lug, no? Of course, there are places that will fill and drill the rear end to 6-lug for more like $100, but if you have to ship an axle to do that, the cost might be similar.

    Of course, an adapter like this allows you to use stock 8-lug spare parts.
     
  3. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>I have doubts as to if this will work on a 14 bolt FF. The hub is larger than the wheel opening on 6 lug wheels. Mabye it can be used on an 8 lug SF but it would be cheaper to have it re-drilled. </font color=blue>

    [​IMG]
     
  4. I would redrill myself,everyone is always asking the question so I just suplied the link.8 lug wheels are alot cheaper!LOL
     
  5. blazen91

    blazen91 1/2 ton status

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    I came up with a way to make the 14bff a 6 lug pattern. Here is the problem, with the larger 13" breaks, which my 14b has, I don't think the 15" wheel will fit over the drum. So I would have to buy wheels any way. I have not measured and compared the two, but I don't think they will fit. The 8 to 6 lug change is simple, but alot of work!

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  6. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>Steel 15x10 wheels will fit over the 13" drums. Aluminum is too thick so it wont fit. How are you going to make it 6 lug?</font color=blue>

    [​IMG]
     
  7. blazen91

    blazen91 1/2 ton status

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    check your private in a few minutes

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  8. jerseyk5

    jerseyk5 Registered Member

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    Just to let you know, I have a 14sf with 13 inch drum brakes and Im running 15 x 10 aluminum american racing rims.
     
  9. Blue85

    Blue85 Troll Premium Member

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    I was under the impression that an aluminum 15x10 will fit on a 14B (13" drum), but will not fit on a 3/4-ton front. Is this correct?

    <font color=blue>"Who are these guys?" --Al Gore, referring to busts of Jefferson, Washington and Franklin on a televised tour of Monticello.</font color=blue>
     
  10. Blue85

    Blue85 Troll Premium Member

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    OK, I just spoke with an engineer at motorsport-tech and he says that to build an adapter to run 6-lug wheels on a 14BFF would be over 4" wide! He claims that the 6-lug bolt pattern is narrow enough that 6-lug wheels can't fit over the big F/F hub. He says that the way to approach that problem is to design a new hub and outer bearing so that they are smaller and then you could run 6 lugs out of it.

    Aren't there people on this board who have had their F/F converted to 6 lug? Please speak up. What is the diameter of a 14B F/F hub and are they all the same?

    This same engineer also told me that 8-lug to 6-lug adapters for a 14B S/F would be about $700/pair and be about 2 1/2" wide each.

    <font color=green>Stupid tourist at Mammoth Cave, Kentucky: "How many miles of unexplored passages are there?"</font color=green>
     
  11. 6.2Blazer

    6.2Blazer 1/2 ton status

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    At one time there somebody on this board with a 14 bolt FF which had been converted over to 6-lug. It looked like the hub had either been custom made or machined down, and the axle flange had also been machined down and was held on with allen head bolts. I've got a picture of it if anybody is interested.
    I just measured the hub on my 14 bolt and it's right at 4.5" in diameter (I would guess they were all the same). I don't think there is any practical way to squeeze on a standard 6 on 5.5" bolt pattern wheel as this would only leave, at most, a 1/4" between the center hole of the wheel and the edge of the bolt hole in the wheel, unless some custom work was done. You probably wouldn't even be able to fit a lug nut on it and forget about a lug wrench.

    Regarding the post with the guy running 15x10 aluminum wheels on a SF 14 bolt w/ 13" drums, I don't think the extra thickness of the aluminum wheels would cause problems in the back. I have at least 1/4" or more clearance with 15" steel wheels on 13" drums and I'm pretty sure the aluminum rims aren't that much thicker. Though I am assuming this guy has a 6 lug SF 14 bolt as 8 lug, 15" aluminum rims seem very rare.
     
  12. Waxer

    Waxer 1/2 ton status Author

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    $700 a pair for some damn adapters? No thanks...
    It'd be a lot less to just get 4 new steelies. At $38 each from summit, you cant go wrong. Converting the front to 8 lug is much stronger and less expensive than putting a bandaid (adapter) on the rear to match the front. My writeup explains the process of the conversion.

    <A target="_blank" HREF=http://www.coloradok5.com/8lugconversion.shtml>http://www.coloradok5.com/8lugconversion.shtml</A>
     
  13. HarryH3

    HarryH3 1 ton status Author

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    I haven't heard of a 14-bolt FF being converted to 6-lug. Only the 14-bolt SF. The SF doesn't have those huge bearings and the hub hanging out there in the way of the small wheels.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
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  14. Blue85

    Blue85 Troll Premium Member

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    The name that I got before was Moser Engineering, that they could "fill and drill" a 14 F/F to 6 lugs. I talked on the phone with one of their reps today and they said that they didn't do it and that it really wasn't possible without redesigning the outer parts of the axle.

    It's too bad that I got my hopes up when I heard somebody talk about a $100 conversion from 8 to 6 lugs on a F/F. At least I didn't buy wheels yet.

    <font color=green>"MAN THOUGHT HURT BUT SLIGHTLY DEAD" --Providence (R.I. Journal)</font color=green>
     
  15. HarryH3

    HarryH3 1 ton status Author

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    I think seeing the 14-bolt part might have confused you. They can do that for a 14 bolt SF, but not for the FF. That center hub on the FF is one big chunk of steel! I recall someone on here talking about having it done to a 14-bolt SF for something like $100.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
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  16. pcorssmit

    pcorssmit 1/2 ton status

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    FYI: All the cool kids are running 8 lugs. [​IMG]

    ORU is now selling a 6 lug, 10.5" 14 Bolt, for around $3000. What they do is convert it to a semifloater, and use 1/2 ton brakes on it. Dumbest thing I've ever seen. Chances are, if you need more strength than a 9.5", semi floater, 6 lug 14 bolt, you need more brakes than a 12 bolt too.

    My suggestion: spend $100 on a 14 Bolt FF, $320 on a Detroit, and a couple/3 hundred on wheels. Sell your 6 lug junk. Problem solved. Advantage: $2000+, better brakes, stronger axle. 6 lugs are for Toyotas.

    Pete


    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  17. SlyDog

    SlyDog 1/2 ton status

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    This is a really dumb question( i know there is no dumb question) but is this a five lug cause i see 5 bolts?? [​IMG]

    - SlyDog [​IMG]
     
  18. HarryH3

    HarryH3 1 ton status Author

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    Yep! That's a 5-lug.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
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  19. solowookie

    solowookie 1/2 ton status

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    There guys also make adapters from their magazine adds, and I'm assume they would be a LOT cheaper. Their spacers are $65.00 for the 1 1/2" correction problem with the rear axel.

    www.performancewheel.com

    Jeff
     

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