308 head studs

Chris Smith
Chris Smith Expert Adviser
edited February 2013 in HUDSON
Looking for the ARP part number for 1/2" head studs with a 2" thick head. Also who sells them and how much.

Comments

  • oldhudsons
    oldhudsons Senior Contributor
    I was able to get them from hot rod shops but be sure & take a sample so you get the right threads.
  • dougson
    dougson Senior Contributor
    The ARP application for big block Chevy (396-454) mains has been mentioned as applicable to Hudson, the threads are correct for head and block and the head thickness is ok, however, the leaving 2.5" clearance for the head prevents the lower threads form seating and you almost certainly get water seeping from the studs on a warm engine.
  • Ol racer
    Ol racer Senior Contributor
    FYI

    I suggest contacting Randy Maas @ 21st Century Hudson I know he sells ARP Studs for Clifford Head's so probably has them for stock head's as well.

  • GrimGreaser
    GrimGreaser Senior Contributor
    ARP sells standard lengths of studs, no need to hunt for the right size from something else. Go to their website and you can download their catalog or request a print one.
  • Chris Smith
    Chris Smith Expert Adviser
    I looked at ARP on line prior to posting my question. They only show stud kits for specific engines and Hudson aint one of em. I saw no charts for part numbers based on length and diameter. I figure I need a 4" long stud X 1/2 with a six point nut.
  • GrimGreaser
    GrimGreaser Senior Contributor
    edited February 2013
    I have misplaced my catalog, but could've swore they had studs, usually packs of 5.

    Not packs... Individual at that size:
    http://m.summitracing.com/parts/arp-ar4-060-1lb

    4 pack:
    http://m.summitracing.com/parts/mil-81275

    Nuts:
    http://m.summitracing.com/parts/arp-300-8334

    http://m.summitracing.com/parts/mil-82200
  • [Deleted User]
    [Deleted User]
    Fastenal has what you need,$40.00 for 21 cadium plated ,grade eight and they have grade #9 washers. This what I used to up grade to the 1/2 size. I believe they were 3'' long. Then put 90 ft pounds to them.
  • maasfhcenturylinknet
    maasfhcenturylinknet Senior Contributor
    Really don't believe you need studs for a stock motor. 1/2 bolts work just fine. Pulling to 90 lbs I think is excessive for stock--I only go to 80lbs on my race motor with 12-1 compression with the new best gasket and have had no problems. I would only go 75 lbs. Any more you are warping the head and pulling on the cylinders and distorting unless you honed with a torque plate.
This discussion has been closed.

Categories

In this Discussion