Piston and rod size of the D14A3/A4/Z1/Z2

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saxophonias
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by saxophonias »

wow. So this means more compression for d14z?

Law_
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by Law_ »

Guess it is the contrary not?

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NIO
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by NIO »

saxophonias wrote:wow. So this means more compression for d14z?
Yes, It is a little more compression but is more than d14a4.
Law_ wrote:Guess it is the contrary not?
No, it isn't contrary. It is almost flat. I regret that I didn't took pictures of the two pistons, but I was in a hurry for building the engine for the race season. :(
Image

Law_
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by Law_ »

Great. maybe the slightly different compression would be better noticed on a mini me setup !

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saxophonias
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by saxophonias »

maybe this is how they are explained the small differentiations in c/r from 9.0 9.1 and 9.2 we have seen in honda manuals

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mynameisowen
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by mynameisowen »

Man thats very cool news, I wonder how different it is. I would like to use a Y8 head and these Z2 pistons on my mini-me to bump up compression even further.
1996 EJ9 Civic
1998 BB8 Prelude Motegi VTi
1998, B16A2 EK4 Civic VTi

Aims:
EJ9 - Now my GF's car.
BB8 - Rebuild after crash damage to front end.
EK4 - Daily driver. Strip and track prep once prelude project complete

Law_
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by Law_ »

mynameisowen wrote:Man thats very cool news, I wonder how different it is. I would like to use a Y8 head and these Z2 pistons on my mini-me to bump up compression even further.
and remove a layer from the head gasket =)
and maybe remove some material from the head why not ;) ;)

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mynameisowen
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by mynameisowen »

Law_ wrote:
mynameisowen wrote:Man thats very cool news, I wonder how different it is. I would like to use a Y8 head and these Z2 pistons on my mini-me to bump up compression even further.
and remove a layer from the head gasket =)
and maybe remove some material from the head why not ;) ;)
;) indeed
1996 EJ9 Civic
1998 BB8 Prelude Motegi VTi
1998, B16A2 EK4 Civic VTi

Aims:
EJ9 - Now my GF's car.
BB8 - Rebuild after crash damage to front end.
EK4 - Daily driver. Strip and track prep once prelude project complete

marty40
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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by marty40 »

1.3mm skimmed of my head :D

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Re: Piston and rod size of the D14A3/A4/Z1/Z2

Post by Law_ »

marty40 wrote:1.3mm skimmed of my head :D
How much should that raise compression? Compared to removing a layer from head gasket, is it different? How much space left between the valves and piston?Cheers

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