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Bill and Rusty,
Here's something interesting, I thought I'd compare
the Turbo and the NA to a 12A NA.
The first is the 12A, the second is the 13B Turbo
and the third is the 13B NA.
The interesting thing is the 12A and the 13B turbo
have the same opening and closing timing events whereas the NA 13B is the same
only with the opening and closing sooner.
My apology, as this is a much clearer
photo!
I think I will have to confirm the later housings
are the same as my earlier NA housings, as far as timing is
concerned.
I will do this later this week.
George ( down under)
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