Quote:
Originally Posted by deputydog95
High flow cats are just noisy. Cat bypasses are obnoxious. Even headers add to the rasp. My car never sounded better than when it just had aftermarket mufflers and everything else was just stock. I just took off the muffler bypasses recently because I got tired of not being able to use my cell phone.
I would leave the headers, and especially the cats, alone.... People take it for granted but the cats do a lot of sound deadening. These engines don't sound good raw.
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Quote:
Originally Posted by Ian_UK1
Couldn't agree more.
Whereas some engines sound amazing with almost no silencing (Ferrari flat-plane V8s are a perfect example especially in the 355/360) the Porsche 3.8 in the 997S.1 is extremely agricultural sounding by comparison. I'm not sure if it's down to the cam timing, the fact that it's in effect 2 x 3-cylinder engines or other factors The fact is that as Deputydog says, this engine will never sing to you if you open it up too much - it just sounds loud, flat and unrefined.
The best sounding exhausts for this car do seem to keep the standard cats. I just love the Tubis with the rest of the exhaust stock - amazing. It's just a shame it's the cats that are the key to performance as it seems much harder to get a really tuneful sound once the cats are replaced.
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I usually agree with you two on alot of your posts,however,on these ones about the sound of the cats,I do not!
I had Fabspeed headers and mufflers with stock cats and really didn't like the sound and was seriously thinking about changing it.Which is why I purchased the AWE high flow cats.Figured I had nothing to lose and everything to gain!Yes it is louder with the high flow cats,but the sound is completely different from what I had,actually sounds like the car has some work done to it!
Please do understand that on every other car I have had has been built to be fairly quiet,except for my NSX,which I hated with aftermarket exhaust.
I cannot comment on the stock exhaust with high flows,never had it!
But with the above set-up.....I actually love the sound and as long as you aren't bagging on it,it isn't too loud!
Lets's face it if you are bagging on it....exhaust will be the least of your worries when the officer is righting you up,LOL!
I agree with you on the Ferraris and Lambos but to compare them to the Porsche......NO way,they sound WAAAY better!
The sound that eminates from those two is indescribable!
Sorry guys..just my opinion but keep posting I truely do enjoy the posts!
Stacy
PS By watching my tach it seems that the car gets through the RPM's faster.
The 5000-6000 RPM without a doubt goes by way faster now !
I need to revisit the same dyno I did before to get a comparison.