Subject	The pulsations of the exhaust create hi/low pressure waves
Posted by	Ash's Z on May 16, 2005 at 5:46 PM
	This message has been viewed 86 times.
In Reply To	The 7th "P". Good "point". Did you see how smooth is AFR posted by Scotts94z32 on May 16, 2005 at 04:49 PM
Message	in the exhaust tract. A hole in the exhaust system will suck in a little bit of clean air as these low pressure waves pass by and it throws off the A/F reading. The ZEM will allow you to discretely adjust timing or fuel delivery based on RPM and engine load. The ECU uses 4-point interpolation when the RPM or the load value falls between a row or column. You are specifying the exact ignition timing advance BTDC. Red zone is the "knock zone", the only engine condition where the ECU actually listens to the detonation sensor. [ 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	Have fun with THESE dyno charts! - Greg (MA) 15:58:19 05/16/05 To avoid issues like that...... - BOOZTD 3 16:10:00 05/16/05 That shouldn't make it "look" lean since we must assume the - Scotts94z32 16:12:17 05/16/05 Unsure of the timing at this moment... - Greg (MA) 16:42:05 05/16/05 Go to your local auto store and buy a timing gun. You can - Scotts94z32 16:47:13 05/16/05 Whoa! That's really lean! I am sure that the leak in - Ash's Z 16:41:43 05/16/05 I've been reading through the 6P's - Greg (MA) 16:46:49 05/16/05 The 7th "P". Good "point". Did you see how smooth is AFR - Scotts94z32 16:49:28 05/16/05 The pulsations of the exhaust create hi/low pressure waves - Ash's Z 17:46:52 05/16/05 I'm going to try and explain a few things here.. > - Ash's Z 23:28:29 05/16/05 Boost leak check, check timing, and get back to us - JokerF15 (NyxMotorsports) 16:50:57 05/16/05 How much boost do you get, with the boost jets removed?? (n/m) - SactoTodd 16:57:40 05/16/05 peak is about 11psi (n/m) - Greg (MA) 17:37:27 05/16/05 Lil bit a duck (that's right) tape will fix that right up. (n/m) - Kenny 17:06:09 05/16/05 side note - Rickytl (MA) 18:48:09 05/16/05 They usually charge $75 for 3 pulls w/ a/f - Greg (MA) 19:19:56 05/16/05 N.E. Dyno in Woostah is where we've gone the last 2 years. - Dave N 20:43:49 05/16/05 NE Dyno is under new ownership... - Greg (MA) 21:06:58 05/16/05 A boost controller might be better than boost jets - s3trios 19:52:53 05/16/05 greddy should warranty that .... - tyler@boostpro.net 21:52:17 05/16/05
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