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Scott Clarke Scott Clarke is offline
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Join Date: Apr 2002
Location: Eugene, Oregon
Posts: 1,115
It sounds like you are saying that the '69 stacks would flow more CFM at high RPM, even though the ID at the base is the same. I guess this makes sense, and I like your theory about the CR issue. I thought that CRs were about the same between '69 and '70, but Porsche could have been (correctly) anticipating future reductions.
'70 911E short stroke 2.5 MFI. Sold
'56 Cliff May Prefab
Old 02-09-2005, 10:41 AM
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