But for all practical purposes, diesel fuel is not compressible. It's like the pendulum composed of 5 suspended balls. You pull one away, let go and as soon as it hits the second one, the 5th one swings out, then the 5th one swings back in, hits the 4th one & the first one swings out, etc, etc.
In this example, what's being transferred in the energy provided by releasing the first ball. The same is true with the fuel in the injection lines. The IP delivers pressure to the front end, the pressure travels down the line in a very fast moving wave, the pressure wave overcomes the poppet valve spring pressure & the entire column of fuel moves down the line. This is also why diesel injector lines are all a constant length. The pressure wave travels at a set speed & if the lines were different lengths then you really would have a timing issue. Thanks, Tom Hargrave www.kegkits.com 256-656-1924 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Luther Sent: Sunday, August 12, 2007 12:50 PM To: Mercedes Discussion List Subject: Re: [MBZ] thoughts on diesel clatter Say an air compressor is set to turn off at 120 psi. This takes 8 minutes and x number of strokes of said air compressor to achieve this. Then, change the pressure cutoff to 110 psi, and it now takes 7 minutes 23 seconds and x-150 strokes of said air compressor. Then, change the pressure to cutoff at 130 psi. That takes 9 minutes 5 seconds and x+200 strokes of your air compressor. ***disclaimer:all previous calculations are random guesses*** The same physical rule applies to our injection systems. If you lower the pop pressure, the timing will be advanced. If you raise the pop pressure, the timing will be retarded. If you have properly set injectors (according to MB's spec) and if your IP pump produces the correct amount of pressure per stroke (i.e. not worn) and if your timing chain is not stretched, your timing will be correct. Any one of these factors can change with age and cause the timing to change. This is simple physics folks, you can't break/bend the law. -- Luther KB5QHU Alma, Ark '87 300SDL (272,xxx mi) head case '85 Ford F250 6.9 diesel (x58,xxx mi) '82 300CD (166 kmi) '82 300D (74 kmi) getting donor engine-sold '85 300D (280,176) parts car sans engine _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
