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Big End and Main Bearings

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  • Big End and Main Bearings

    What is the current verdict on big end and main bearings for a high performance (180-200BHP) engine?

    Brand and where to buy....I am seeing glacier, glyco, county, king tri-metal....

    I would prefer Vandervell VP2 but these seem to be rare.....

    Jochem
    Flying Dutchman drives: TR6 - 1973 - 56/11 - CF1xxxxUO - J-OD - Kent 280° - EMU Black - Phoenix - 205/70 on 7x15

  • #2
    If I recall revington TR in the UK commissioned a run of Vandervell bearings.

    And may have sold out.

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    • #3
      Yes, just checked their site.

      https://www.revingtontr.com/product/...ing-set-020-ae

      But it looks like they still only have some 20 and 30 thou over. Maybe worth a call as these are generally believed to be the best type of bearings ​​​​​​

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      • #4
        Thanks. I know of Revington. Just wondering where you guys buy your bearings from...it is hard to believe everyone buys from Revington or drives a standard 100HP engine.
        Jochem
        Flying Dutchman drives: TR6 - 1973 - 56/11 - CF1xxxxUO - J-OD - Kent 280° - EMU Black - Phoenix - 205/70 on 7x15

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        • #5
          The way I read that description from Revington, the bearings are not actually Vandervell but rather AE brand.
          Have you checked out KING bearings from BPNW ?
          That's where I buy most of my engine components.
          You want trimetal and that's fine, but after reading up on some articles and one in particular by King, I recently removed the trimetals in my engine and replaced them with bimetals....
          Driving a 1973 TR6
          Doing ZS carb repairs
          email kencorsaw"at"aol.com

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          • #6
            This is exactly what I mean! Thank you!!
            Revington, TRF, Goodparts recommend the Tri-Metal bearings, I contacted them! Reading King’s website, for iron cast crankshafts, the bi-metal maybe the better choice. So what is going on here?? I can only imagine the following, if you nitrade the crankshaft, the surface becomes harder and after polishing the surface structure resembles steel crankshaft and no longer iron cast structure. Which in that case, tri-metal would be the better choice. However, my studies on materials and hardening go a while back, so I am not sure if this theory is correct. Any thoughts?
            jochem
            Flying Dutchman drives: TR6 - 1973 - 56/11 - CF1xxxxUO - J-OD - Kent 280° - EMU Black - Phoenix - 205/70 on 7x15

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            • #7
              The head engineer at King recommends bi-metals for classic cars. Based on tolerances etc. Tri-metals for new cars. He didn't get into metallurgy of cranks or otherwise. Even if I was building a high performance engine I'd follow what he said. His point was bimetal offered more (thicker) metal for contaminates to bed into that the oil system of classic cars will allow to flow thru the system.

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              • #8
                what size bearings are you looking for in vandervell,I have extras in standard,.010,.020
                Phil

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                • #9
                  I am a lot closer to my decision. First of all, the TR6 crankshaft is NOT iron cast. But EN16 Steel (British Standard Engineering Norm). EN16 can be forged very good and has about 16,708,347 lbs/ft2 (800N/mm2) strength.
                  With this said, bi-metal aluminium bearings still seem the right choice for our application (race and street engine).

                  Jochem
                  Flying Dutchman drives: TR6 - 1973 - 56/11 - CF1xxxxUO - J-OD - Kent 280° - EMU Black - Phoenix - 205/70 on 7x15

                  Comment


                  • #10
                    An interesting read on the Triumph Register about main bearings. My 2 cents, I would stick to the original trimetal bearings. I can't find where I read it, but I clearly remember reading a very good comparison between the tri metal and bi metal bearings and the conclusion was tri metal all the way.

                    https://www.tr-register.co.uk/forums...-end-bearings/

                    https://vandervell.co.uk/


                    And you either love him or hate him, but Kai at Wishbone Classics only sells trimetal and he is arguably one of the most knowledgeable individuals when it comes to TR6s.

                    http://www.wbclassics.com/content/ma...-gt6-tr250-tr6


                    Last edited by ChandlerEast; 04-25-2019, 09:01 AM.

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                    • #11
                      Main and Big End clearances run about 0.0015 - 0.0020" (David Vizard).
                      Reading King's Bearings Technical Documentation, Tri-Metal bearings are sensitive to 0.0005" particles and misalignm. With our tolerances given, this can easily be achieved. Also with our synthetic oil, metall particles or whatever can be found in our oil.
                      I contacted a german engine builder, who builds engines for Triumph Competition and has a TR with +240 HP. He only uses Aluminium Bi-Metall bearings (Glyco). The Aluminium bearings are in-sensitive to such particles and misalignm.
                      I respect Goodparts, WBClassics and TRF for their comments, also Moss. All of them I contacted. Ofcourse they all confirmed the bearings they sell. Interestingly, they all sell the same King Tri-Metal bearings, but the weakest version (CP). The Fatigue strenght is close to its Aluminum Bi-Metal bearing (HP).

                      I went thru the UK, USA Forums regarding answers. There is NOT a definite answer, and all is very subjective.
                      In my case, at the moment I am leaning towards Aluminium Bi-Metal....however, my second engine is a work in progress and this opinion may change again.

                      Jochem

                      Flying Dutchman drives: TR6 - 1973 - 56/11 - CF1xxxxUO - J-OD - Kent 280° - EMU Black - Phoenix - 205/70 on 7x15

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