millsn Posted October 13, 2001 Share Posted October 13, 2001 Can I get some wisdom on suitable jetting for DCOS 45s on a standard 2.0 ltr zetec please? I apear to have 155 F6 130 (where the 130 is a the squirty end of the mains and the 155 at the top) - just call me a layman! Nigel Mills - 2.0 Zetec carbs Link to comment Share on other sites More sharing options...
cdg Posted October 13, 2001 Share Posted October 13, 2001 Nigel, What you have at the moment are 130 main jets, 155 air correctors, and F6 emulsion tubes. These seem a little on the small side for a 2litre engine making about 165bhp. Try this; Choke 36mm Main jet 145 Air corrector 180 Emulsion tube F16 Idle 50 F9 Pump jet 40 or 45 This will certainly be a good starting point. Chris. Link to comment Share on other sites More sharing options...
oilyhands Posted October 13, 2001 Share Posted October 13, 2001 cdg, They look straight out of the Weber jetting program from Dave Andrews website... Experience of the Zetec shows that they need a bit larger idle jet than commonly used, a 55f9 might be a bit better. Oily Link to comment Share on other sites More sharing options...
cdg Posted October 15, 2001 Share Posted October 15, 2001 Oily, You're almost right! Just trying to help. I don't profess to be a luminary on Zetecs whether standard or otherwise,(I'm a crossflow man!) but I did recognise that the inputs in Dave Andrews' programme bear an uncanny resemblance to information not only in the Weber and Dellorto manufacturers' manuals,but also in writings on carburation by David Vizard. So if you're accusing me of plagiarism....... Chris Link to comment Share on other sites More sharing options...
oilyhands Posted October 15, 2001 Share Posted October 15, 2001 cdg, nope not accusing anyone of anything, no offence intended..smile.gif the rules for calibrating Webers are pretty well known, they've just been automated in the program, just so happens I ran it here and got identical results. There's bound to be a lot of commonality between information on a subject with such limited scope as a Weber. The design is fixed and well known, the rules are fixed and well known. Oily Link to comment Share on other sites More sharing options...
millsn Posted October 15, 2001 Author Share Posted October 15, 2001 Thanks chaps - does anyone have experience of using ths jet combination? Nigel Mills - 2.0 Zetec carbs Link to comment Share on other sites More sharing options...
oilyhands Posted October 15, 2001 Share Posted October 15, 2001 I've used exactly that combination of main circuit jetting on a friends warmed over 2 litre Pinto and it proved marginally on the rich side although not by much, we took the mains down to 140 although YMMV. The idles were changed for 55f8s although it ran reasonably well on the 50f9s. Oily Link to comment Share on other sites More sharing options...
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