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here we go Posted by jak [Email]  (#195) [Profile/Gallery]
(more from jak) on Fri, 10 Mar 2006 18:36:36
In Reply to: Probably not more efficient... (long), Jonathan Scupin  [Profile/Gallery]
, Thu, 9 Mar 2006 16:12:02
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Ill use this idea on my header & divide it I wonder how much it will help?
I saw on a subaru they got 380 HP with a GT32 with a 51 lb wheel
the other thing I thought was nice about the GT32 is that I can hang a bigger compressor wheel on it at some point too if I want to
Figure 6. Welded tubular manifold with a divided turbine inlet design feature
The concept is to DIVIDE or separate the cylinders whose cycles interfere with one another to best utilize the engine's exhaust pulse energy.
For example, on a four-cylinder engine with firing order 1-3-4-2, cylinder #1 is ending its expansion stroke and opening its exhaust valve while cylinder #2 still has its exhaust valve open (cylinder #2 is in its overlap period). In an undivided exhaust manifold, this pressure pulse from cylinder #1's exhaust blowdown event is much more likely to contaminate cylinder #2 with high pressure exhaust gas. Not only does this hurt cylinder #2's ability to breathe properly, but this pulse energy would have been better utilized in the turbine.
The proper grouping for this engine is to keep complementary cylinders grouped together-- #1 and #4 are complementary; as are cylinders #2 and #3.
, Sat, 4 Mar 2006 17:46:39, Sun, 5 Mar 2006 08:01:34, Sun, 5 Mar 2006 07:17:17, Sat, 4 Mar 2006 19:10:02, Sun, 5 Mar 2006 07:22:19
, Sun, 5 Mar 2006 09:02:58, Sun, 5 Mar 2006 13:46:51, Sun, 5 Mar 2006 13:56:46, Sun, 5 Mar 2006 17:46:34, Thu, 9 Mar 2006 14:03:16, Thu, 9 Mar 2006 16:12:02, Fri, 10 Mar 2006 18:36:36 <-- Viewing This Message, Fri, 10 Mar 2006 22:09:50, Sat, 11 Mar 2006 09:02:55, Fri, 10 Mar 2006 18:19:15, Fri, 10 Mar 2006 07:44:14
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