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On 26 Aug 2005 at 9:20, Craig Webb wrote: > Tank was cleaned out during restoration, so it should still be good. I've > got a very large pressure gauge, so I should be able to mount it high enough > and steal a quick glance backwards when driving! Taking a friend along in the back seat as the gauge observer works even better. He/she can watch it all the time, while you concentrate on putting the system to work. > 34 psi is not maxed out on the system, but after 35psi the injectors > struggle to re-seat (something I been told from a D-Jet guru). That surprises me, as I've heard of Mercedes folks running these at 40 psi. (Not that it was a good idea, just that they'd done it and seemed to think that it worked fine.) I'll have to look at the injectors and springs and think about this a bit. I don't think it's an easy problem, so I'd probably just have to do an empirical test. > >1776 is only an increase of 11% over the stock displacement. I'm guessing > >that the stock PS has enough headroom to tolerate that, but with your > >instrumentation you should be able to tell us, without guessing. > > When I researched this engine, the common answer seemed to be "All you need > to do is up the fuel pressure to 30-32psi". My experience with this engine > suggests that this would be seriously lean at speed (say 17-18 AFR). The > engine does run quite nicely now. Idles well, pulls well and behaves > nicely. Occasionally get a bit of 'bucking' when driving slowly in first or > second. MPS seems to cope ok. I'll post up the engine specs shortly, but > its got a mild cam in it (CB Cheater - slightly more lift and duration, but > not as much as say an engle W100) and an ISP over the top exhaust. Others have reported that a non stock cam was the one thing that seemed to keep them from getting this to work. Personally, I don't know. It seems like we should be able to get any of these options to work well, but the number of things to try verges on the infinite, so progress is slow, and success always seems just out of reach. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~