My '66 had winglets, a pod, extended front exhaust pipes, and an air condintioning condenser scoop installed before I bought into it, so I cannot give quantitative before/after comparisons.
Compared to my dad's '68 with fresher engines, I get about 5 mph more tas at 8,000', 2500 rpm, and full throttles. Even with the pod, pipes and scoop. Both aircraft have JPI digital tachs.
Randy Hurt
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