Subject	The 3" flows TOO well at low throttle and allows too
Posted by	Ash's Z on December 25, 2005 at 10:31 AM
	This message has been viewed 83 times.
In Reply To	Correct. posted by Dallas DamonZ on December 25, 2005 at 09:20 AM
Message	much blow-through of the cylinder during valve overlap. This blow through carries fuel right through the chamber and into the exhaust manifold, which affects the mixture within the cylinder - making it leaner and providing less fuel for combustion; hence, the lag in throttle response. With a variable backpressure setup, you can overcome this rather easily. [ ashspecz.com ] [ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor. Albert Einstein
Follow Ups	3" exhaust - GOTZSPD 21:33:14 12/24/05 His car would go even faster with 3" exhaust. - Ash's Z 21:41:55 12/24/05 Just checked, TimZ's 860HP all-turbo seutp is the highest - Ash's Z 21:46:25 12/24/05 Re: Just checked, TimZ's 860HP all-turbo seutp is the highest - GOTZSPD 21:49:41 12/24/05 I'm game for it. I still have all my 2.5" piping from my - Ash's Z 21:53:50 12/24/05 Re: I'm game for it. I still have all my 2.5" piping from my - GOTZSPD 21:59:45 12/24/05 Yes, we would definately need a dyno comparison session - Ash's Z 22:08:53 12/24/05 Re: Yes, we would definately need a dyno comparison session - GOTZSPD 22:15:48 12/24/05 Re: Re: Yes, we would definately need a dyno comparison session - Ash's Z 22:54:08 12/24/05 while you're at it - Gho32 22:17:08 12/24/05 Re: while you're at it - GOTZSPD 22:23:30 12/24/05 Why? - Jared Todd 02:45:59 12/25/05 Not to drift OT here - A R T I E M E A S E 02:17:58 12/25/05 Still need an aftermarket ECU - Broke_as_**** 06:10:03 12/25/05 Correct - maglito 15:58:45 12/25/05 megan racing does nopt make a full 3 inch turbo back! - 300zdett(nj) 23:43:29 12/24/05 I wonder what he has in that case. - Ash's Z 23:48:02 12/24/05 It's all relative to how much power you are making - Russell@Z1 23:52:22 12/24/05 Correct. - Dallas DamonZ 09:20:39 12/25/05 The 3" flows TOO well at low throttle and allows too - Ash's Z 10:31:38 12/25/05 Turbo cars don't need back pressure - aliaZ 13:40:46 12/25/05 2nd, 3rd, 4th.. 12963th (n/m) - turtleboy 14:53:32 12/25/05 Wrong. Before the turbocharger gets spooled up, the engine - Ash's Z 19:21:41 12/25/05 your response doesn't disprove my argument - aliaZ 22:03:57 12/25/05 You are very strongheaded for someone who obviously hasn't - Ash's Z 22:09:40 12/25/05 I'll be patiently waiting - aliaZ 22:14:14 12/25/05 Let me ask you then. Why did Dee's car have a significant - Ash's Z 22:19:11 12/25/05 it has been pretty well established that - aliaZ 22:27:49 12/25/05 Only problem there is that you are likely just comparing - Ash's Z 22:45:08 12/25/05 I'm not referring to peak numbers - aliaZ 10:28:57 12/26/05 Well, I respect your thoughts on the matter Don, really. - Ash's Z 19:57:07 12/26/05 fair enough (n/m) - aliaZ 21:11:08 12/26/05 Venturi type effect? (n/m) - turtleboy 02:53:33 12/26/05 I agree - turtleboy 02:54:39 12/26/05 I have a full 3" turbo back exhaust system.. - Shawn300zTT GT28R MD 04:59:16 12/25/05 And I have a really good idea that will bring the bottom - Ash's Z 07:56:25 12/25/05 And it is what we discussed last time you were up here - Shawn300zTT GT28R MD 08:18:18 12/25/05 Re: And I have a really good idea that will bring the bottom - Dallas DamonZ 09:14:04 12/25/05 It will be an actively controlled backpressure valve, - Ash's Z 10:27:16 12/25/05 I saw one of those installed on a 2005 Mustang GT with - MidLifeZ 10:41:54 12/25/05 Well, that's not the same though. That device sounds - Ash's Z 11:05:27 12/25/05 how do you know there is fuel blow-through due to overlap? - aliaZ 13:34:19 12/25/05 Because of my cam selection. (n/m) - Ash's Z 19:19:48 12/25/05 have you found a way to measure it? - aliaZ 22:06:12 12/25/05 It is my educated guess, put forth to try and make reason - Ash's Z 22:24:25 12/25/05 please see my reponse above (n/m) - aliaZ 22:28:55 12/25/05 Re: It will be an actively controlled backpressure valve, - Mitchell(AMZ Performance) 14:25:04 12/25/05 More like this (C6 Z06 style): - maglito 20:12:44 12/25/05 No, that's just a cut-out valve. That is used to reduce - Ash's Z 22:58:36 12/25/05 The ATP product does produce backpressure. - Shawn300zTT GT28R MD 15:56:54 12/26/05
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