| Author | Topic |
|---|
Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
|
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
Thu, 14 August 2003 10:35
 
|
 |
ahh K, i'm from a different school of thought...
i reckon that if you need backpressure, then you have too much exhaust scavenging, and the exhaust after the extractors is not the problem...
ideally you want a high degree of scavenging, but when the intake valve has just opened, and just before the fresh charge is about to come out the exhaust valve, you want a positive pressure pulse to hit the exhaust valve to sort of 'plug it up' and stop the fresh mix from escaping. ie pulse tuning, or reflection tuning...
rather than having an exhaust with backpressure to keep the mixture in the cylinder, you could cut down on the valve overlap... or put a resictor valve in the exhaust to create backpressure at lower rpms where the overlap is the biggest problem..... anyway i could babble on for hours 
Cya, Stewart
|
|
|
| | Subject | Poster | Date |
|---|
 |
N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Thu, 14 August 2003 08:30 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
boudan | Thu, 14 August 2003 09:43 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Thu, 14 August 2003 10:03 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
oldcorollas | Thu, 14 August 2003 10:18 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Thu, 14 August 2003 10:22 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
oldcorollas | Thu, 14 August 2003 10:35 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Thu, 14 August 2003 11:09 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
oldcorollas | Thu, 14 August 2003 14:21 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
oldcorollas | Thu, 14 August 2003 14:22 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Fri, 15 August 2003 01:51 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
oldcorollas | Sun, 17 August 2003 14:21 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Mon, 18 August 2003 02:47 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
oldcorollas | Mon, 18 August 2003 03:38 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
boudan | Thu, 14 August 2003 10:06 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
draven | Thu, 14 August 2003 10:08 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Thu, 14 August 2003 10:14 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
draven | Thu, 14 August 2003 11:39 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Thu, 14 August 2003 11:50 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
draven | Thu, 14 August 2003 12:28 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Thu, 14 August 2003 12:30 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
7M-Brisbane | Fri, 15 August 2003 13:21 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
ed_ma61 | Mon, 18 August 2003 14:22 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
gmsta27 | Mon, 18 August 2003 18:27 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
oldcorollas | Tue, 19 August 2003 02:06 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
BlackSupra | Tue, 19 August 2003 08:34 |
|
Re: N/A exhaust diameter and decreasing diameters vs flow.
|
ed_ma61 | Tue, 19 August 2003 11:13 |
