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Thread: small journal or large journal?
          
   
   

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  1. 02-10-2006 03:01 PM #1
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    muteboy49
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    small journal or large journal?

     



    im about to order some ARP main studs and i dont know which ones i need, a large journal or small journal set
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  3. 02-10-2006 06:36 PM #2
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  4. 02-10-2006 06:37 PM #3
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    yeah i worded it all retarded
    sorry
    how do i know if i need small journal or large journal studs?
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  5. 02-10-2006 06:37 PM #4
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    Re: small journal or large journal?

     



    Originally posted by muteboy49
    im about to order some ARP main studs and i dont know which ones i need, a large journal or small journal set
    If you have the engine apart have a machine shop measure your crank main bearing dia.
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  6. 02-10-2006 06:46 PM #5
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    what are the specs. for small and large journals?
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  7. 02-10-2006 09:16 PM #6
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    Large journal caps are a little taller and require a little longer stud. In 1968 the main bearing saddles were increased in size from 2.3" to 2.45", so if your block was manufactured before that, it's a small journal, after that it's a large journal.

    Small journal cranks have a main diameter of 2.300" and a rod diameter of 2.000".

    Large journal cranks have a main diameter of 2.450" and a rod diameter of 2.100".
    Last edited by techinspector1; 02-10-2006 at 09:18 PM.
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  8. 02-11-2006 08:58 AM #7
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    thanks my block is a 89 i believe
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