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Hotwatermusic Hotwatermusic is offline
1974 911 w/ 83 SC engine
 
Join Date: Aug 2009
Location: Austin, Texas
Posts: 605
Quote:
Originally Posted by mlangbauer View Post
This is a great post. Any ideas on the hp increase with using a cat bypass and a Flowmaster or Dynomax muffler?

Best,
Matt
I'm already not running a cat, I just have a test pipe going from heat ex'ers to the muffler. Power wise, the only thing I noticed was the surge of power comes on a little earlier now with the Flowmaster. Whereas before the car would get that surge at 3.5k, it kicks in around 2.7k or so now.

The sound is pretty close to what I was hoping for. Not too loud in anyway, but has a great howl when you floor it. At highway speed in 5th gear I can barely hear the Flowmaster over the wind noise inside the car. Honestly, I could actually stand for it to be slightly louder and raspier in every regard.

Also, the weight difference between the Flowmaster and stock muffler was a huge reason for me to do the swap. The Flowmaster weighs less than half of the stock (12lbs vs. 30lbs). In all, I am very happy with how the whole thing turned out.
Old 04-13-2010, 04:24 PM
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