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Dodgeman
Re: Advantage of a higher compression head (kidney shaped)
#1
No life (a.k.a. DattoMaster)
Joined:
2003/6/27 14:53
From Southern Tablelands N.S.W. Australia
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Registered Users
Posts: 8287
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Just exactly what head does your engine have on it. Round port, or oval.

Generally speaking, Datsun controlled the compression ratio by varying the size of the bowl in the piston, not the size of the combustion chamber, although this chamber volume does vary a little none the less.

If you have a non GX oval port head, then there's a chance that you have lower compression on an A12 engine. If it's a round port head from an A12 engine, then the compression for all hovered around 9 to 1. Geting better than 9.5 to 1 with a stock head & piston combination would be a treat.

Posted on: 2006/10/9 15:21
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Subject Poster Date
     Advantage of a higher compression head (kidney shaped) d1t 2006/10/9 6:53
       Re: Advantage of a higher compression head (kidney shaped) d1t 2006/10/9 13:09
         Re: Advantage of a higher compression head (kidney shaped) rb20 2006/10/9 13:15
           Re: Advantage of a higher compression head (kidney shaped) 1200GXman 2006/10/9 13:33
             Re: Advantage of a higher compression head (kidney shaped) killer1200 2006/10/9 14:48
       Re: Advantage of a higher compression head (kidney shaped) Dodgeman 2006/10/9 15:21
         Re: Advantage of a higher compression head (kidney shaped) d1t 2006/10/10 9:14
           Re: Advantage of a higher compression head (kidney shaped) killer1200 2006/10/10 10:21
             Re: Advantage of a higher compression head (kidney shaped) Tyrie 2006/10/10 22:52
               Re: Advantage of a higher compression head (kidney shaped) killer1200 2006/10/11 12:49
                 Re: Advantage of a higher compression head (kidney shaped) Mildman 2006/10/11 12:56
                   Re: Advantage of a higher compression head (kidney shaped) pro-240c 2006/10/12 14:11
                     Re: Advantage of a higher compression head (kidney shaped) Mildman 2006/10/12 14:15
                       Re: Advantage of a higher compression head (kidney shaped) blofly 2006/10/12 14:20
                         Re: Advantage of a higher compression head (kidney shaped) Freak 2006/10/12 22:42
                           Re: Advantage of a higher compression head (kidney shaped) ddgonzal 2006/10/13 3:52
                             Re: Advantage of a higher compression head (kidney shaped) qik1000 2006/10/13 5:34
                               Re: Advantage of a higher compression head (kidney shaped) Ronald 2006/10/13 8:57




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