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Hot Rods 392 HEMI rear main seal

Discussion in 'The Hokey Ass Message Board' started by 73RR, Jun 7, 2020.

  1. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    How many of you guys that have, or deal with, a 392 would have an interest in a split lip seal? As you know, the 392 has a unique shaft diameter at the seal and as far as I know Best is the only source for a 2-piece seal. I think that a split seal is a better design.
    Something like this:
    [​IMG] upload_2020-6-7_12-45-27.jpeg
    This type of split seal is common in the aircraft world and provides excellent service.

    I am looking at a custom run of domestic made seals but the costs are huge for my small quantity needs. Generating a larger volume always lowers the unit costs.
    So, just wondering if there is any interest.

    .
     
  2. Arominus
    Joined: Feb 2, 2011
    Posts: 394

    Arominus
    Member

    I’d take one
     
  3. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 6,436

    Ebbsspeed
    ALLIANCE MEMBER

    I'd put a pair of them in my stock. PM me if you have them made.
     
  4. hemihotrod66
    Joined: May 5, 2019
    Posts: 968

    hemihotrod66
    Member

    I have always had good luck with the old rope style packing....
     
  5. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,355

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    @73RR ....would these also be applicable to a 331/354 crank/block if shortened.....if they can be shortened?

    Ray
     
  6. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    Ray, I am not sure how much 'spring' would be in the 'hoop' and if they/it would tolerate squeezing to a smaller ID.
    If this project gets to that point I will quiz the mfgr.

    The problem with doing one-offs is all about quantity. The setup costs are, at this point, several hundred dollars and a small run, 50 +/-, ends up at about $50 each. This is more than I want to have on my shelf as I have no plans for another 50 rebuilds of any kind.....My goal was to get the unit costs to about $35. This is about the retail cost for Bests 2-piece and not too painful to have to have 5-6-7 laying on the shelf.

    Gary
     
  7. Hey Gary,
    Have you spoken to Bob at Hot Heads,,,,he might go in with you .
    He sales a lot of Hemi stuff,,,but he might be happy with his stock now .
    Would this type of seal be an improvement over the two piece type ?

    Tommy
     
  8. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,355

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    @73RR

    Gary,

    I understood your position from the outset. That is why I asked about the feasibility of modifying this seal to fit more applications......if that would work reliably, it could/should significantly increase demand/sales and help the unit cost by volume. I can commit to two (331/354) for sure if it will work in modified form.

    Ray
     
  9. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    ...is a split seal better than a 2-piece? Oh yeah, a lot better. The split can be placed where you want it and since the seal is made for a specific diameter the gap is nearly zero.

    .
     
  10. Eddie
    Joined: Apr 2, 2006
    Posts: 657

    Eddie
    Member
    from Georgia

    I'll take one for sure, maybe two.
    Eddie
     
  11. SEAAIRE354
    Joined: Sep 7, 2015
    Posts: 552

    SEAAIRE354
    Member

    Thanks for the info. I had no idea that there was only one manufacturer for these seals. Like the others I would also be interested in 331/354 seals as that’s what I’m working on first but would be interested in the 392. That will hopefully be my next build.


    Sent from my iPad using The H.A.M.B. mobile app
     
  12. Paul Stewart
    Joined: Jul 23, 2020
    Posts: 13

    Paul Stewart

    I'm in for one.
     
  13. cool effort.....good luck
     
  14. MikeC62
    Joined: Jul 22, 2015
    Posts: 147

    MikeC62
    Member
    from Missouri

    I’m in for one or two. I despise oil leaks
     
  15. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    Thanks for the interest guys! I will continue to nurse this project for awhile.


    Gary
     
    Hnstray likes this.
  16. Brand Apart
    Joined: Jan 22, 2011
    Posts: 813

    Brand Apart
    Member
    from Roswell GA

    Unfortunately I only have a 354 and 291. But maybe someday
     
  17. bchctybob
    Joined: Sep 18, 2011
    Posts: 5,730

    bchctybob
    Member

    You can put me down for two as well.
     
  18. lilmann
    Joined: Apr 13, 2017
    Posts: 145

    lilmann

    I’d be interested in one for sure
     
  19. Joel W
    Joined: Jan 4, 2010
    Posts: 171

    Joel W
    Member

    I am in for 6 if you get to around $35 per seal. Thanks Joel

    Sent from my XT1710-02 using The H.A.M.B. mobile app
     
    Last edited: Aug 9, 2020
  20. rod1
    Joined: Jan 18, 2009
    Posts: 1,452

    rod1
    ALLIANCE MEMBER

    Sign me up for one..
     
  21. Hnstray
    Joined: Aug 23, 2009
    Posts: 12,355

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    @73RR .....

    Gary, if you come up with a manufacturing plan that seems economically feasible, but requires dependable support to pull the trigger, I am willing to up front some money for ‘my’ seals to ensure you have a market for the seals when produced. Only stipulation in my case is, I need them for 331/354 not 392, but I would commit for two for sure.

    Ray
     
  22. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    Thanks Ray,

    As we discussed, I'd have to ask the mfgr about using them in a smaller hole.

    Gary
     
    Hnstray likes this.
  23. Hemi Joel
    Joined: May 4, 2007
    Posts: 1,618

    Hemi Joel
    Member
    from Minnesota

    How's this project coming? I'd take a few.
     
    loudbang and seb fontana like this.
  24. seb fontana
    Joined: Sep 1, 2005
    Posts: 9,087

    seb fontana
    Member
    from ct

    Think a split seal in 1.750 id x 2.375 od is doable?
     
  25. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    At this point it will still take more volume than what I have 'found'.

    If one of you die-hard Hemi nuts wants to take over just let me know; I have to focus
    on some personal issues and don't have much free time these days.

    .
     
  26. moparboy440
    Joined: Sep 30, 2011
    Posts: 1,127

    moparboy440
    Member
    from Finland

    What should the Seal dimensions be? I've got access to hundreds of industrial Seal catalogues at work, might already be a Seal out there with the right dimensions.
     
    seb fontana likes this.

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