d series turbo... z6 or y8 built head?

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Old Apr 13, 2008 | 06:25 PM
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4ghatch's Avatar
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Default d series turbo... z6 or y8 built head?

what head is better the y8 or the z6 for turbo? looking for 250+ with a z6 block eagle rods, vitara pistons, ect for the head i was thinking just springs and retainers then a bigger cam
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Old Apr 13, 2008 | 07:03 PM
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Default Re: d series turbo... z6 or y8 built head? (4ghatch)

If I remember correctly, the z6 head outflows the y8, but the y8 combustion chamber has a quench zone. I'm not sure that either of these factors will be that significant. I'd get the cheaper one.
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Old Apr 13, 2008 | 08:41 PM
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Z6 head hands down!
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Old Apr 13, 2008 | 10:06 PM
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Default Re: (da_dude)

y8 head, prevents detonation from modified combustion chambers. and they flow the same, whether people want to agree or not.
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Old Apr 13, 2008 | 11:26 PM
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From: hmt noggs
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explain the prevents detonation from modified combustion chambers. I believe the y8 had offset ports to promote more swirl/turbulence.
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