LSPV Delete?

Discussion in '1989-1995 Build-Up/Project Threads' started by Packmule, Jan 18, 2024.

  1. Packmule

    Packmule Member

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    I was wondering if anyone on here has done an actual delete of the LSVP. I have read, elsewhere, that people have deleted these by disconnecting the rod from the axle and ziptying it up. Essentially, full open thus eliminating it from the system. That being the case, why not remove it and all the plumbing to and from the LSVP? Perhaps someone could enlighten me. I can't test my theory on this because my truck has no drivetrain at this time.
     
  2. Packmule

    Packmule Member

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    Sorry, Newb here! Meant to post this in the maintenance thread. Maybe someone could move this or tell me how to delete and I will repost.
     
  3. RetirementToy

    RetirementToy Enthusiast

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    Porportioning valve.JPG I replaced mine with a Wilwood adjustable proportioning valve as have rear disk bakes .
     
    Last edited: Jan 18, 2024
  4. Packmule

    Packmule Member

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    I have watched videos where people have just removed it entirely, without adding another proportioning valve. Have not seen actual results of that process. Like video proof if it actually works. I will probably try without, just for my own satisfaction. If it doesn't work, I will go with Wilwood.
     
  5. Erwin Merida

    Erwin Merida Toyotaholic

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    The only time I've seen a PV delete work was when you upgraded to a ported tandem MC. Otherwise you just lock up if you don't have enough weight out back. Deleting it will take your line pressure from a 70/30 bias to 100% all around. Also, when ppl delete the PV is due to a disc conversion in the rear with out modification to the MC. But it's like shooting in the dark to get the right front/rear bias so guys use these adjustable valves in place like @RetirementToy has.
     
  6. Packmule

    Packmule Member

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    Thank you for the explanation! I think that's what I kept coming back to in my head. Full pressure front and rear. Since I will be hauling loads quite frequently, I should probably keep something like the original LSVP in place, maybe a more reliable aftermarket one though. Would an older, dual chamber MC work in place of this? Do they have built in proportioning valve? Like an older GM MC?
     
  7. Packmule

    Packmule Member

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    To answer my own question, no they don't have built in PV.
     
  8. RetirementToy

    RetirementToy Enthusiast

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    I also changed the MC to the 1'' 7/8'' one & the power booster to a duel diaphragm one
     
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  9. Erwin Merida

    Erwin Merida Toyotaholic

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    Yea you @RetirementToy have a decent setup. Nothing tooooo fancy but you touch all the right places and that's what matters. I also would like to add the adjustment valve, may not need to boost the rear everyday but it matters that one day you did.

    @Packmule if your not afraid of modifying the fire wall, the possibilities are endless! And the junkyard becomes your best friend! Haha
     
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  10. Packmule

    Packmule Member

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    @Erwin Merida Oh yeah! The junkyard and I go way back! The motor and transmission were both pulled from the junkyard. I have no fear of "customizing" my truck!
     
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