[Vwdiesel] Latest fun :-)

[The President]

Isn't this Jetta the only diesel on the forum that is less economic than the 
gasser version? }8OD}
A coulple of MPG improvement could just be the result of reassembly! This 
engine should be turned into a boat anchor and a boat anchor turned into an 
engine ;op
Mark

>From: LBaird119 at aol.com
>To: vwdiesel at vwfans.com
>Subject: [Vwdiesel] Latest fun  :-)
>Date: Tue, 7 Feb 2006 02:45:58 EST
>
>   For those that don't know, we now have a two axis CNC, Bridgeport copy,
>milling machine!  Yay!  Now I can spend all that spare(???) money on 
>tooling!  x
>axis screw got the end broken off in shipping even though the motor had 
>been
>removed, so the screw is on its way back to the seller, who very nicely
>volunteered to fix it for shipping only.  :-)
>   This now brings up my option for getting the Rabbit running again.  I've
>contemplated dropping the CR to around 19:1 for better performance and 
>mileage.
>I dropped the Jetta from not even qualifying for a one notch gasket, to
>putting in a three notch.  It seems to rev quite a bit more freely but with 
>its
>mileage, it's no indicator whether it should increase noticeably or not.  I
>figure I got about a 1 point drop in CR.
>   When I calculated things out I came up with needing to mill 1mm off of 
>the
>pistons, not counting the recesses, to go from 23:1 to ~19:1.  That's with 
>1mm
>oversize pistons, which works out to very near a full 1500cc displacement.
>Anybody care to work it out and see if they come up with the same amount?
>   Has anybody else done any sort of CR drop and noticed anything?  I do 
>have
>to let the glow plugs go for the full cycle or it won't start but it DOES
>still start well.  It just used to only have to glow a bit and that was 
>good
>enough.  I got ONE tank that was a couple mpg better than its previous best 
>but
>that's it.  It does wind out more like when I was testing propane on it.
>Afterwards the propane mostly felt like simply adding more fuel, smoke and 
>all.
>      Loren
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