Subject	Welcome to thermodynamics.
Posted by	Kenny on April 01, 2005 at 5:25 PM
	This message has been viewed 29 times.
In Reply To	How would increasing the diameter of the pipe create more posted by myzislow on April 01, 2005 at 05:01 PM
Message	Increase in pipe volume decreases the exhaust gas velocity, giving it more time to transfer heat to the pipe, as it expands into the greater volume, losing heat in both processes, thus losing even more volume, all resulting in a reduction of exit speed. The exhaust gas closer to the engine hits this gradient of cooling gas at a lesser flow rate, thus seeing greater pressure in that portion of the exhaust. mkay? Kenny... PETZ Member #5 SteamyZ. Never had did me wrong. - SL103 07/06/04 11:58:15
Follow Ups	Need help regarding 3" test pipes - kmahmood 10:56:19 04/01/05 Not really any reason to do that. (n/m) - YugoBernie (NoVA) 11:03:05 04/01/05 I was getting a good deal on cat back exhaust with - kmahmood 11:10:24 04/01/05 Only if you want a performance decrease. (n/m) - Kenny 11:05:56 04/01/05 Out of curiosity, why would it decrease performance? (n/m) - DougG 14:12:13 04/01/05 Short answer, more backpressure. (n/m) - turtleboy 14:55:26 04/01/05 How would increasing the diameter of the pipe create more - myzislow 17:01:28 04/01/05 Welcome to thermodynamics. - Kenny 17:25:40 04/01/05 It decreases the exhaust gas velocity. - Kenny 16:34:59 04/01/05 Interesting. Thank you for the breakdown. So, it is not - DougG 19:05:32 04/01/05 I believe the two preceeding posts are tryign to tell you - Seafordguy 11:11:02 04/01/05 I'm with this guy. (n/m) - Kenny 11:19:57 04/01/05 post your dyno's then? (n/m) - ZBlacktt 01:39:54 04/02/05 Who put a question mark at the end of the prompter? (n/m) - Kenny 22:59:57 04/02/05 Speaking in 3rd persons, lol. (n/m) - ZBlacktt 21:00:00 04/03/05 I disagree, I felt a power INCREASE going from 2.5" - shawn300zTT GT28R soon 14:32:20 04/01/05 Bigger = cooler and slower - turtleboy 14:55:01 04/01/05 Have you *dynoed*, or just *felt* a difference? - Dallas DamonZ 17:28:29 04/01/05 BS, do some searching yourself :) (n/m) - ZBlacktt 00:39:07 04/02/05 2.5", 3" are HARD to argue to be MUCH different. Given - Scotts94z32 12:05:49 04/01/05 a 3 inch exhaust from the cat back will not create a - Slowninja(GT28RS Inconel Z) 20:17:18 04/01/05 and your not going to see one - ZBlacktt 01:37:54 04/02/05
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