Probably been discussed before, but what is the best distance between the turbine and bellmouth of the pipe? about 10mm? turbine is an evojet 130 in a skymaster F 15
thx!

It should be about 20mm from the end of the exhaust cone to a straight pipe (like on a bandit ARF install). If you have a bellmouth, depending on the distance from the beginning of the bellmouth to the beginning of the straight pipe will determine the actual distance. If you are measuring from the end of the exhaust to the beginning of the bellmouth only, then 10mm may be too much, depending how big the bellmouth is..

Chad

The bellmouth is about 10 mm before the straight pipe begins, the OD is 110mm, ID 85mm..