Date: Sun, 21 Aug 2005 16:35:55 GMT
From: Paul Halliday <pjghnospamyonder.co.uk>
Subject: Re: K-Jetronic


in article 2005082113062916807%edamman2000nospamail, miniman at edamman2000nospamail wrote on 21/08/2005 13:06: > have any of you guys run a pressure switch on the cold start injector > so that it comes on at around 5psi? I would be well interested to hear > the results! Most people who need more fuel on CIS powered SAABs are running in excess of 1 bar of pressure! The tuners who thought that utilising the fifth injector found that the fuel did not mix well and overshot the first couple of intake runners, leaving them lean compared to the last couple of cylinders. Of course an extra injector further back down the intake pipe work seems to work well. The other solution is to run a second "common rail", thus: <http://www.pjgh.pwp.blueyonder.co.uk/saab/misc/Dual Injector Rail.jpg> ... Or similar principles, whereby a second set of injectors are welded onto the intake runners, primed by the CIS fuel distributor and fired/controlled by an aftermarket FI system. With your boost, I wouldn't think it necessary anyway ... Just give it adequate pressure and perhaps set the timing back a little. Your mixture might need enrichening to compensate, also? My turbo is fine at between 1.5% and 2.0% CO for pressures up to 3/4 bar (12 PSI), but nudging up to 1 bar, I need closer to 3.0% to avoid knock. That does make for a thirsty car, obviously :( Paul Vart tog v”gen v”gen? SAAB : Nothing on earth comes close

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