Originally posted by derf
how do you tune a turbo?... can you explain? never really understood that..... what are you able tp change... besides. boost
Fuel and timing maps. Of course, you would need a way to alter those maps. In the case above, they used an AFC to tune the fuel curve.
Originally posted by tokyoracer
so does this mean the the apexi will make more power with a smaller lbs of boost when compared to the greddy kit? since the apexi is ball bearing.. so i am assuming that it'll spool faster than then greddy? is that correct?
Whether it would make more power per pound of boost would depend on the thermal efficiency of the turbo, and how well the setup is tuned. The IHI bb turbo is about the same size as the TD04H in the GReddy kit, so I would wager their thermal efficiencies are pretty similar. Yes, with two similar turbos, the ball bearing one would spool slightly faster.