Join Date: Sep 1999
Location: Southeast Iowa
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Re: Test Your engine knowledge!
[img]/wwwthreads_images/icons/laugh.gif[/img] WOAH! WOAH THERE BIG FELLA! Heh heh heh......you boys is jest a liddle off th' mark heah. Wot yer referring to as "Compression Braking" is actually VACUUM Braking. Yep, that's right. VACUUM does the slowin' down, not compression. That's why diesels are just like a roller skate downhill, there IS no intake manifold vacuum in a diesel so the compression stroke and the power stroke cancel out to ZERO. In gassers, the high intake manifold vacuum holds the vehicle, NOT compression, because if the truth were known, at idle, or with the throttle plates closed, there isn't much compression.[img]/wwwthreads_images/icons/tongue.gif[/img] In order to increase economy, Detroit has made cams which LOWER the low power setting, and idle manifold vacuum, so the cars coast better and get better fuel mileage.[img]/wwwthreads_images/icons/tongue.gif[/img] Now, if you want a real challenge to your newly engine-aware brain, try to determine how the Jacobs Engine Braking System in diesel trucks actually works. Heh heh....there'll be a quiz on Friday.[img]/wwwthreads_images/icons/laugh.gif[/img]
Quadra-Tracs modified While-U-Wait by the crack moonguy[img]/wwwthreads_images/icons/wink.gif[/img] Quadra-Trac Team.[img]/wwwthreads_images/icons/tongue.gif[/img][img]/wwwthreads_images/icons/smile.gif[/img]