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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 03-05-2005, 10:41 PM   #41
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2 seater, have you thought about the tuned port manifold off of the L27 ? Many have asked if that manifold will bolt to LN3-C
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Old 03-06-2005, 10:33 AM   #42
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I was looking at the heads a little while back and noticed that the L27'* have the PCV passages in the heads... Took a little for us to determine what the added hols were for... PCV....

But the L27 heads will bolt to the LN3 block...

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Old 03-06-2005, 10:41 PM   #43
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I have looked at the tuned port manifolds, both the aluminum and plastic ones, but there are too many things in different places for me to start over. I built a flow bench for the express purpose of trying to even out the internal flow characteristics of the stock manifold. If anyone is familiar with the Power Plate for the GN engines it looks like a tubular version of that, although not nearly as elegant looking. It seems to work as intended, at the devolopment test pressure of about 1/2 psi, or 14" of water, total flow through the manifold with the stock MAF and throttle body attached is a little over 300 cfm and total variation, high to low, between the individual ports is 1.2 cfm.

Both systems, turbo supercharging, or blower supercharging, have strengths and weaknesses, but I like the turbo'* ease of changing boost level in only a couple on minutes.
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