collin_bucko

If I were to remove the catalytic converter on my truck, would it mess with the backpressure bad enough to make the performance of the truck drop, or is removing it completely fine.

mishkaya

Do you have a California model? As far as I know the '99's didn't have a catalytic converter.
mishkaya

collin_bucko

your right, it doesnt. my bad, I was just talking with some friends, and i was told not to mess with the cat, but if it doesnt have one i dont have to worry.

Red3quarter

Your 99 shouldn't have a cat unless its a cali truck. Your truck should have a resonator and muffler on it. Take it off if you want to, you aren't going to hurt the engine by straight piping it. Your turbo already provides enough back pressure for the engine.

wcbcruzer

The problem occurs when you go to a pipe that's too big that slows the exhaust down, has nothing to do with back pressure.

tx_2500

Unlike a NA platform, any ammount of backpressure is parasitic for a turbocharged application. If anything youll see a slight decrease in the ammount of time it takes to spool up (this is good).

Here is a very interesting article and has a tid bit of info on turbocharger selections. Granted its for Subaru's but the information carries over.

http://www.tercelreference.com/terce...st_theory.html

collin_bucko

Thanks, the article was pretty informative.