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revhead001
Re: Is a H89 head high or low compression ratio
#1
No life (a.k.a. DattoMaster)
Joined:
2008/3/15 3:30
From Melbourne
Group:
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Posts: 2742
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That is not entirely true DD. In Australia we have the H75 head which is an open chamber and we got the H89 which is closed chamber. Depending on the bottom end, if it has a slight dish or flat tops and you intend to run over 7 psi of pressure then I would source a H75. Using that you should not have to run a decompression shim. Unless you plan to run much higher boost. Then you should consult a professional engine builder.

Posted on: 2009/10/13 4:44
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Subject Poster Date
     Is a H89 head high or low compression ratio Datsss 2009/10/12 21:48
       Re: Is a H89 head high or low compression ratio andy-roo 2009/10/12 22:03
       Re: Is a H89 head high or low compression ratio Datsss 2009/10/12 22:07
         Re: Is a H89 head high or low compression ratio andy-roo 2009/10/13 0:01
           Re: Is a H89 head high or low compression ratio ddgonzal 2009/10/13 2:44
             Re: Is a H89 head high or low compression ratio Datsss 2009/10/13 3:26
       Re: Is a H89 head high or low compression ratio revhead001 2009/10/13 4:44
         Re: Is a H89 head high or low compression ratio ddgonzal 2009/10/13 4:55
       Re: Is a H89 head high or low compression ratio revhead001 2009/10/13 5:19
         Re: Is a H89 head high or low compression ratio ddgonzal 2009/10/13 6:03
       Re: Is a H89 head high or low compression ratio Adam12 2009/10/13 8:00
         Re: Is a H89 head high or low compression ratio ddgonzal 2009/10/13 16:27
           Re: Is a H89 head high or low compression ratio Datsss 2009/10/13 21:43




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