I originally planned and tried TA set up on my Cosmo 13B. Soon after the first few flights removed the turbo and vent NA. At the time did not pay much attention on the throttle body size, counting on the turbo to make up for any losses. Today I measured the inside opening of the TB and was surprised to find it was only 60mm. This is rather small. Paul Lamar on his visit also said I should get a bigger one. I wander what size TB other people are using, or any comments and suggestions on the matter will be helpful.

Buly