Originally posted by marshun
that TB looks awesome. that would yield some gains correct? im a performance dork. i had to ask
Depends on the rest of the engine, really. That particular TB is a 60mm from a 2000 3.8L V6. The stock TB can flow a good 300-330cfm, which is actually enough to feed a 3.8L V6 up to about 5500-6000rpm pretty easily. So the stock one wasn't a major restriction, and so polishing/halfshafting doesn't net you a world of gains. In other words, the stocker flowed about 300cfm - mine all cleaned up as above flows about 330-360cfm, which is better, but since 300cfm was just about enough to begin with, there really isn't a huge performance increase.
Remember, when building an engine, it's NOT about bigger is better. It's about matching, and getting each component suited to every other component. THAT'S when you start to make serious power. An 80mm TB flows a ton of air, but on a 3.8L V6, won't do shit beyond what a good 60mm TB would do.