Throttle Body/Carb spacer

[Waternut]

Putting a throttle body/carb spacer on cars is something people have been doing for a while. Has anyone ever tried this on a jet ski? I'm thinking about this for two reasons...
First off I'm curious to know if it would give any power gains.
Secondly I'm thinking of going to a Mikuni carb because this Kiehin :rocketwhore:is a pure POS . However, instead of buying a new intake manifold I think I could fabricate a 0.25" thick spacer that would mount to my current manifold and have mounting points for the mikuni.

 

[waxhead]

you will lose throttle response when you move the throttle plate away from the reeds

In a car its more important for torque when you are using midrange but in an f1 car they have very short intakes to allow for top end hp

A jet ski engine flares up very fast due to the pump slip
so the gains would be overcome by the loses