Originally Posted by 1QwkSport2.5r
My TT .25 carb behaved similarly - the transition from idle to WOT was sloggy and slow even with the idle set as perfect as I could get (I could get a 2000rpm idle with a 9x5 on 5% nitro) but it was just a slug both in manners and power. Mine was twin ballraced and had a Meehanite piston/steel liner. Piston seal was very very good...
It was advised not to run it real fast and not with a lot of nitro if you wanted it to last at all.
Yes the seal was good between piston/sleeve, but not at the crank... It sprayed fuel like crazy from the crank.
I also believe that rpm should be kept to a minimum, if I recall right a 9x4 was recommended.
I did run it with pipe, but the rpm increase was waaay beyond anything healthy for that engine.
I had planed to use it in a boat and did convert it, but it was only tested in a tub. Never got around to using it for anything...