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  1. marinop

    Conrod Aluminium Alloys ?

    Hi Kenre, Have you calculated the stresses on the rod for your application? According to the engineer at ARP who designed out bolts at 8000 rpm got the dynamic load of 8600 lbs. No engineer that I've spoken with want to stick out his nec and commit, especially those at Alco and Kaiser but the...
  2. marinop

    stainless vs 4140 for headbolts with aluminum threads

    Hi Metalguy, What is the reason you would not use the 303! Marino
  3. marinop

    stainless vs 4140 for headbolts with aluminum threads

    We only use 25lb/ft on 3/8" x 24 x 4" headbolt bolting aluminum heads onto aluminum cylinders. I am looking to keep compressive strength (torque on the copper headgasket) as close to constant as I can. With this being an air cooled engine. There are load of heating and cooling cycles. I'm...
  4. marinop

    Conrod Aluminium Alloys ?

    I too am interested in aluminum Alloys for con rods. I'd like to manufacture some rods for motorcycle use. Old Brit bikes come with forged alloy rods. I have looked into using 7075, 7175, 7068, C405 etc. all of these alloys are tough but when subjected to heat the strength goes away ans goes...
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