Y8 head VS: Z6 head flow wise???
06-19-2003, 06:39 PM
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Re: Y8 head VS: Z6 head flow wise??? (JDMCRX)
besides CR, deck height, and cam key location and cam sprocket TDC marks.
also, almost forgot, there is an extra port to the manifold on the y8, so if you "accidently" use a z6, or zc IM gasket, your idle will be fuct.
also, almost forgot, there is an extra port to the manifold on the y8, so if you "accidently" use a z6, or zc IM gasket, your idle will be fuct.
06-19-2003, 06:44 PM
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Re: Y8 head VS: Z6 head flow wise??? (delslo26)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by delslo26 »</TD></TR><TR><TD CLASS="quote">also, almost forgot, there is an extra port to the manifold on the y8, so if you "accidently" use a z6, or zc IM gasket, your idle will be fuct.</TD></TR></TABLE>
I block/cover it with a spare cap from the break line bleeder
Anything thick to cover it will be fine.
I block/cover it with a spare cap from the break line bleeder
Anything thick to cover it will be fine.
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06-20-2003, 10:14 AM
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Re: Y8 head VS: Z6 head flow wise??? (tonesdef)
I just finished reading a post on the D-series board about this.
Apparently the Y8 head has a curve in one side of the intake ports, allowing for better low- and mid-rpm swirl, while the Z6 has equal-length and size ports to promote high-rpm flow. The Y8 also splits the port farther back than the Z6. It was noted, however, that unless you're pushing massive power, the flow characteristics aren't that different, so you won't notice any appreciable difference.
Apparently the Y8 head has a curve in one side of the intake ports, allowing for better low- and mid-rpm swirl, while the Z6 has equal-length and size ports to promote high-rpm flow. The Y8 also splits the port farther back than the Z6. It was noted, however, that unless you're pushing massive power, the flow characteristics aren't that different, so you won't notice any appreciable difference.
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