Europipe Bazooka..... OMFG!
Originally Posted by grussell
Why would you want race cats and no mufflers as opposed to no cats and race mufflers?
That was just a free flowing setup for someone who doesnt want a CEL and with no software upgrade. I have no cats and race muffler's, just giving options
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I am inclined to side with Craig.
Here are a few things to throw us even more off track.
1. Most cars (including the TT) will make better low end torque with a more restrictive exhaust.
2. Hot exhaust gases cool quickly and reduce in volume as they cool. I have heard a theory where the best exhaust would be a reducing diameter one. The further from combustion, the smaller the optimal pipe.
3. Most believe that the the best Turbo exhaust for power = no exhaust. I disagree, there is some element of "scavenging" whereas the velocity of the previous pulse "sucks" more of the next pulse out the engine. Maybe this is why #1 is true?
4. I truely believe the difference between two or more intelligently designed and thoroughy tested system brands is marketing and hype.
5. Given #4, it's hard to see how Vivid is making 600+HP on K16s no matter what. Now I've said it!
Here are a few things to throw us even more off track.
1. Most cars (including the TT) will make better low end torque with a more restrictive exhaust.
2. Hot exhaust gases cool quickly and reduce in volume as they cool. I have heard a theory where the best exhaust would be a reducing diameter one. The further from combustion, the smaller the optimal pipe.
3. Most believe that the the best Turbo exhaust for power = no exhaust. I disagree, there is some element of "scavenging" whereas the velocity of the previous pulse "sucks" more of the next pulse out the engine. Maybe this is why #1 is true?
4. I truely believe the difference between two or more intelligently designed and thoroughy tested system brands is marketing and hype.
5. Given #4, it's hard to see how Vivid is making 600+HP on K16s no matter what. Now I've said it!
Originally Posted by Craig
Again, I am an uninformed, relatively simple-minded novice. However, I do not think you can create the effect of an atmospheric release within an exhaust pipe. Moving from 76 mm (the approximate diameter of a K24 exhaust outlet) to 84 mm for just a few inches (before the chamber muffler) will, IMHO, retain far more pressure/restriction than a release to the atmosphere. Moreover, after this relatively short 84 mm path, the exhaust gases enter the chamber muffler where they get reflected back and forth against angled walls within the chamber housing, thereby creating restriction and back pressure. Once again, this is far more pressurized and restrictive than a release to the atmosphere. Thereafter, the exhaust gases get released from the muffler through two different pipes, with diameters of 70 and 76 mm, as opposed to the 84 mm diameter than you analogized to an atmospheric release. I do not believe this exhaust path can be said to replicate a release to the atmosphere.
Additionally, while we are focused here on pipe diameter, pipe length is also relevant. With an "open pipe - no cat - stock tailpipe” exhaust (our reference point), the 60 mm pipe, albeit more restrictive than an 84 mm pipe, has a very short length in comparison to the EP Bazooka.
Craig
Additionally, while we are focused here on pipe diameter, pipe length is also relevant. With an "open pipe - no cat - stock tailpipe” exhaust (our reference point), the 60 mm pipe, albeit more restrictive than an 84 mm pipe, has a very short length in comparison to the EP Bazooka.
Craig
Last edited by Turbo Fanatic; Nov 13, 2006 at 02:49 AM.
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