Peanut butter info

Discussion in 'PSI Superchargers Tech Questions' started by darkside, Jun 30, 2015.

  1. darkside

    darkside Member

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    #1
    darkside, Jun 30, 2015
  2. NITROBANDIT1

    NITROBANDIT1 LOST IN SPACE

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    Pb and crack

    interesting info. I thought the reason pb was used was mainly in diesel torque when you are really going high on the ft lb to keep from cracking/slipping erratically. maybe that was figured into their equasion as most dd use this as part of the
    torque sequence. maybe on lower torque it isn't as accurate. good info.
     
    #2
    NITROBANDIT1, Jun 30, 2015
  3. tafc1445

    tafc1445 Member

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    Not too surprised at the different values for different lubes. We maintain A380 and A330 wheels and brakes for Qantas and the torque specs varies quite a lot even with different grades of moly grease. 200ftlbs for the MIL-T-5544 and only 168ftlbs for the MIL-PRF-83483. The most accurate way of torqueing is buy using a stretch gauge or via the torque angle method.
     
    #3
    tafc1445, Jun 30, 2015
  4. jrracing

    jrracing Member

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    We have been using a torquing compound on our stuff for years looks just like peanut butter get it from your local caterpillar dealer.
     
    #4
    jrracing, Jun 30, 2015
  5. Mike Canter

    Mike Canter Top Dragster
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    Jrracing, that peanut butter you are using is what they tested in the link that Darkside had in his original post and they showed it was no good and made for erratic torque.
     
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    Mike Canter, Jul 1, 2015
  6. Flyboy68

    Flyboy68 Member

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    It would be interesting to see a non bias party do this test. Not saying ARP is misleading, but I've never seen a test done by a supplier that didn't come in first? I noticed how peanut butter meets the desired pressure on the first hit though.
     
    #6
    Flyboy68, Jul 1, 2015
  7. TOL

    TOL Active Member

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    When they say "torque cycle" do you take that to mean back off the joint and then torque again, or just come back later and just re-torque? It would have been nice to know if they lubed the threads and the washers. I "assume" from the one uncaptioned pic that they did both? Does it almost seem from this test that PB is still a good one shot & walk away solution? Good to know that ARP has their product. I guess it makes sense that if you buy bolts/studs from them, that they can match with a known lube.
     
    #7
    TOL, Jul 1, 2015
  8. Mike Canter

    Mike Canter Top Dragster
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    One thing to take into consideration which shows up in the test is that with a head or main caps on a Detroit diesel or other big diesels you are not doing a lot of torque cycles in the life of the motor. You put a Detriot Series 60 motor together with the intention of it lasting a million miles. A lot of times with these big diesels you replace the head bolts/studs if you remove the head. All they want with that PB is to torque down correctly the one time.
     
    #8
    Mike Canter, Jul 1, 2015
  9. darkside

    darkside Member

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    which would also be required on a fuel team
    but not an alky match race car the you may routinely re-torque and not take off the heads
     
    #9
    darkside, Jul 1, 2015
  10. jrracing

    jrracing Member

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    Interesting article for sure but cant say we have had any issues with the PB so cant see any reason for us to change at this time.
     
    #10
    jrracing, Jul 6, 2015

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