will a ball bearing t3/t4 spool up as fast as a s16g? how much slower than an s16g is a s20g? thanks

Not sure about your 2nd question but the awnser to your 1st one is no, the t3/t4 is a much bigger turbo and with even the BB option I don't think it can spool up as fast. Both turbos respond better in certain HP ranges, quick example.. t3/t4 for higher HP.. S16g for anything under 400 HP

The ball bearing turbo T3/T4 will spool full boost at about 2500rpm's....I'm not sure what the s16G does, but I'm sure it does not spool much faster then that...maybe like 2000rpms full boost is achieved with the s16G...but the Ball Bearing does make a HUGE difference, especally with a Boost controller and even turbo wrap. Hope this helps.

I use to have a White 99 GS Sport with a Star Stage II Ball Bearing T3/T4 turbo...it was fun untill....well those who remember me know Oh Ya...this is what I have now... a 99' GSX...