BTW;
Rusty, what diameter barrels on your TB? Mine are 44 mm (series 3003),
which could be great for automotive (street or racing), where idle transition
and throttle response are more important. For aircraft I do believe that
a bit larger would be better.
Hi Al,
I've measured mine a
number of times, and I recall that they're essentially 1-5/8, which
of course works out to about 41mm. The TWM site only lists 40
and 42 for the 2900 series, so I'm not sure exactly which one I have. I
got it from Atkins originally, with the wrap over manifold, so I got whatever
he was sending out.
I see they also list 45, 48, 50 and 55 mm
in the 2900 series. See if they’ll take a trade-in on yours for a
50 mm, and we’ll see if it gives better performance. I’m sure
you don’t mind redoing your manifold J.
Al