Subject	The engine internally has a fixed displacement, this
Posted by	Ash's Z on January 12, 2010 at 11:29 AM
	This message has been viewed 88 times.
In Reply To	Not more air volume. That is set by displacement and rpm. posted by not4resaleZ on January 12, 2010 at 10:57 AM
Message	is true. However, the pipes feeding the engine are flowing an air volume that does vary depending on boost pressure. Example: At 14psi of boost pressure, you will have a positive displacement of air through the pipes to fill the cylinder which is at lower pressure during the intake stroke. However, at higher boost pressures, there is more of a pressure difference between the pipes and the cylinder. This affects the air mass quantity as you state, but it also affects the air volume passing through the pipes themselves as higher boost pressure will force more air volume in the pipes into the cylinder. [ 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	Ashpech Massives question. - MannyB 16:57:01 01/11/10 I wouldn't be so sure there would be that much to gain. - MixManMash 17:46:40 01/11/10 I did the math on the filling of volume comparison - Ash's Z 17:56:10 01/11/10 Based on what turbo setup? I did find when I upgraded to Z1 - MixManMash 20:40:41 01/11/10 Something else must have been going on for your spoolup - Ash's Z 08:26:18 01/12/10 Not more air volume. That is set by displacement and rpm. - not4resaleZ 10:57:20 01/12/10 The engine internally has a fixed displacement, this - Ash's Z 11:29:24 01/12/10 You're talking about Volumetric Efficiency. I think that - not4resaleZ 12:01:09 01/12/10 Dont confuse volumetric efficiency with the result of - Ash's Z 14:38:16 01/12/10 eh... - aliaZ 17:34:38 01/12/10 When you take your finger off of the end of the syringe, - not4resaleZ 17:52:34 01/12/10 Guess this pretty much gives me what I was looking for - MannyB 22:01:58 01/11/10 No much of any modifications - it is recommended to - Ash's Z 08:03:45 01/12/10 Where do you relocate the carbon canister to? Also - MannyB 15:02:00 01/12/10 did you see this? - aliaZ 18:13:59 01/11/10 wasnt there recently a stock turbo car in the 450 460 whp - Dane (Houston) 19:22:19 01/11/10 I must have missed that. However, I would like to see what - MixManMash 20:42:25 01/11/10 To quote GD ...... - The Hawk 20:52:32 01/11/10 Some people want a mid range turbo like a 530BB which have - MixManMash 06:58:00 01/12/10 OK...I thought that by "smaller" you meant stock - The Hawk 08:14:55 01/12/10 I have a Sport 530 car. Hence why I raised my questions. - MannyB 14:28:22 01/12/10 Learn how to read. I replied to MixMan (n/m) - The Hawk 20:46:15 01/12/10 2" to 2.5" pipes drop air velocity from about 100mph - not4resaleZ 11:03:37 01/12/10 Just remember this ---- - swedishwlf 20:49:40 01/11/10 what octane? (n/m) - inf 23:00:13 01/11/10 All runs on q16. (n/m) - swedishwlf 23:11:41 01/11/10 Great! That's some very good information. - MixManMash 07:02:20 01/12/10 What was the boost level on all 3 runs w/ the stock turbos? - TTFairladyZ 21:41:03 01/12/10 I don't see the GodSpeed IC's mentioned anywhere. - jschrauwen 07:33:37 01/13/10
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