I threw the Sonic on the dyno today to test out the ported throttle body that sneakerfix so graciously provided.
Nothing earth shattering, but it does appear that upper RPM gains are where this mod helps the most. The gains, however, aren't very consistent
Here are a couple graphs that show what I'm talking about.
runs 2&3 are the stock throttle body.
Although if you compare the best stock TB run vs. the best ported TB run, you can see that the gains aren't always so clear.
Nothing earth shattering, but it does appear that upper RPM gains are where this mod helps the most. The gains, however, aren't very consistent
Here are a couple graphs that show what I'm talking about.
runs 2&3 are the stock throttle body.
Although if you compare the best stock TB run vs. the best ported TB run, you can see that the gains aren't always so clear.