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| ang94541 |
Posted: 2004/8/28 8:17 Updated: 2004/8/28 8:17 |
No life (a.k.a. DattoMaster)   Joined: 1999/12/6 From: Castro Valley,CA USA Posts: 1191 |
 Re: A12 head face I should have also pointed out the round intake ports and the single bolt between the intakes.
This is a stock, open chamber head. I would imagine the mythical GX head has larger oval intake ports.
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| A14force |
Posted: 2004/8/29 0:30 Updated: 2004/8/29 0:30 |
No life (a.k.a. DattoMaster)  Joined: 2003/12/3 From: Christchurch NZ Posts: 3707 |
Re: A12 head face Yes they do. Their ports are even taller than the oval port A14/15. They have smaller combustion chambers to.
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| Dodgeman |
Posted: 2004/8/29 7:46 Updated: 2004/8/29 7:46 |
No life (a.k.a. DattoMaster)  Joined: 2003/6/27 From: Southern Tablelands N.S.W. Australia Posts: 8287 |
Re: A12 head face Surprise surprise. According to my Datsun book, the combustion chamber volume of the 1200GX cylinder head is 29.1cc, + or - .5cc while the standard, round port head volume is 27.5cc + or - .3cc
I would have sworn it was the other way around, but thats what the book says.
I guess that if you ran flat tops under a stock round port head, you would have slightly more compression than the stock GX
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Mechanical
Engine
2004/8/28 8:12 
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