Subject	in the early 90's yamaha introduced the exup exhaust system
Posted by	scubasteve (rebuilding) on December 28, 2005 at 7:56 PM
	This message has been viewed 85 times.
In Reply To	Re: Hi Ash......... posted by Ash's Z on December 28, 2005 at 01:57 PM
Message	on the yamaha yzr sportbikes. I think it was called exup, something like that. In the midsection of the exhaust theres a valve that opens up as the rpms go up. It causes slightly more restriction at lower rpms to help with low-mid range power. Then it opens up all the way for the high rpm power. --.scubasteve.-- (Rebuild started: April 2004. estimated completion: huhu pull my finger huhu huhu)-->
Follow Ups	Turbo Exhaust Flow 101 ............... - Greg D. (Specialty-Z) 23:02:09 12/27/05 Thank you it was very informative and appreciate - dream Z (MD) 23:12:54 12/27/05 Wow, that is great info Mr. DuPree! Vote to FAQ (n/m) - Gold Z 23:12:54 12/27/05 Thanks Greg, interesting read. Happy New Years and congrats - dregos 23:13:52 12/27/05 Informative post. Definitely worth the time to read - ZXRider(SoCal) 23:16:23 12/27/05 Great info! Vote to FAQ! (n/m) - FastFrankie 23:27:14 12/27/05 Merry Christmas SPECIALTYZ and Congrats DEAN See you on the - Eishozzzz 23:40:10 12/27/05 you hit the nail on the head - aliaZ 23:43:21 12/27/05 vote to FAQ (n/m) - jmw23712 23:56:59 12/27/05 Thanks Greg! (n/m) - Piranha(Omaha) 23:58:17 12/27/05 Happy holidays to Specialty Z and congrats to Dean. (n/m) - RHulme 00:11:56 12/28/05 Thanks for the info! - MarTTy4653(SeaTTle) 00:13:26 12/28/05 Dean sucks. - ZHOUND 00:24:24 12/28/05 just make sure it's a red swingline stapler! :) (n/m) - bobZtwin (NC) 07:02:20 12/28/05 Oh yea, what do I call my exhaust now? "Dupree" cat back? (n/m) - Piranha(Omaha) 00:24:26 12/28/05 great, now I'll have to buy my third set of downpipes - - robo (sebring1970) 00:27:07 12/28/05 Same here. (n/m) - 300zxquire 01:33:11 12/28/05 Awesome of you to enlighten us... - A R T I E M E A S E 00:34:39 12/28/05 Dean?! Oh no... - Snoguitar 00:37:35 12/28/05 Stop typing and go finish Zo's car!!! :-) (n/m) - Dallas DamonZ 00:48:49 12/28/05 Cant wait to see the new products. (n/m) - CrazyGreek 00:51:36 12/28/05 Thanks! Great info. - induetime 00:53:35 12/28/05 Great right up. Looking forward to the results. VTF! - mr. zed line 01:06:39 12/28/05 Very Nice right up! Vote FAQ! - Zlover300 01:40:06 12/28/05 Nice write-up Greg, you got mail. :-) - Rage 02:10:42 12/28/05 allways though air wanted to flow from - Rickytl (MA) 02:42:40 12/28/05 Great info, Greg! Can't wait to see your new products, man. - TheTwinZ (Peru) 02:58:21 12/28/05 A+ (n/m) - turtleboy 03:45:20 12/28/05 Awesome ...just awesome ... keep us informed .. - Slowninja(The Devil's Z) 06:12:06 12/28/05 Thanks for the info! Vote to FAQ (n/m) - Wui (Philly) 06:14:09 12/28/05 Great INFO wish you guys prosperous New Year!!!! (n/m) - jzee32tt 06:55:49 12/28/05 Nice post...looking forward to the R&D...Congrats to Dean.. (n/m) - Kyle(Houston) 07:26:38 12/28/05 It's been awhile since I've read such an informative post - 91tt (conversion almost done) 07:59:09 12/28/05 Thanks for the info Greg. It still amazes me how well you - Ash's Z 08:16:56 12/28/05 Hi Ash......... - Greg D. (Specialty-Z) 11:50:54 12/28/05 Re: Hi Ash......... - Ash's Z 13:57:08 12/28/05 You are the GOD!!! - Spongerider :) 16:03:11 12/28/05 I noticed that too.... - colocomp (Denver) 16:14:36 12/28/05 lol (n/m) - Turbodog (CT) 10:09:40 12/29/05 WOW. (n/m) - Ash's Z 17:15:08 12/28/05 in the early 90's yamaha introduced the exup exhaust system - scubasteve (rebuilding) 19:56:26 12/28/05 yep - aliaZ 20:23:20 12/28/05 Great info! (n/m) - Arnel@Z32racing.com 08:52:15 12/28/05 Very informative - keep up the great work (n/m) - NytWolf 10:34:33 12/28/05 Nice @@@ (n/m) - VECTOR 11:30:34 12/28/05 After reading all of that.... - RSR 11:54:15 12/28/05 X2! (n/m) - Spongerider :) 13:31:05 12/28/05 Great info Greg. Congrats to Dean. Any rough ETA on the - sfarrah 12:06:23 12/28/05 I have wondered about the expansion chamber concept - Turbodog (CT) 13:31:06 12/28/05 the downpipes you are describing sound like - Moxie 14:39:00 12/28/05 Good to see you getting back into R & D and ..... - lewoolf2 15:01:23 12/28/05 Great writeup Greg! Hope all is well... (n/m) - degradated 15:18:28 12/28/05 Wow......Wow....Thanks. - ConVerTT 15:48:13 12/28/05 Great writeup and congrats Dean on the new position! - SeedyROM 19:24:29 12/28/05 Re: Turbo Exhaust Flow 101 ............... (n/m) - Daniel(CA) 02:35:38 12/30/05 Re: Re: Turbo Exhaust Flow 101 ............... - Daniel(CA) 02:36:00 12/30/05 Re: Re: Re: Turbo Exhaust Flow 101 ............... (n/m) - Daniel(CA) 02:36:07 12/30/05
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