tom jelly wrote:

My 1982 suzuki rm250 dirtbike had a flat slide throttle carb.  never got
stuck. It WAS some sort of black polymer, though.

Tom

A lot of SU carbs were around and they rarely got stuck despite all their
other problems. I am not taking any chances as the turbo can generate
higher intake system pressures than a NA engine. At 5 psi boost the 
pressure load on the closed slide plate can be 50 pounds.

BTW the HP loss with normally aspirated engine butterflies can be considerable. 
Racers try to cheat in the Star Mazda series by streamlining the butterflies. 
Apparently it gives them enough edge to win. A NA aircraft engine throttle is wide
open at anything above 8000 feet. Not to say the HP is more than 70%
at 8000 feet however despite the WOT. With a turbo that point does not 
come until the critical altitude is reached of around 12,000 to 20,000 feet
I suspect.

Besides all this slide throttles are just plain cool :-)

Paul Lamar
 
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