I also have an AFR meter (which i would highly recommend), so I can tune it on the fly. Even without the AFR meter the pot makes on-the-fly tuning so much easier. It's a lot quicker to figure out whats going on by twiddling the knob and doing another pull in 3rd gear on the freeway instead of having to stop the car, futz with dip switches, and then get back up to speed and try the whole thing again.
I set the module once, and the only time I really change it is when I use a different kind of gas.. and it does make a difference. Consistently with chevron gas I could hit just below full rich on the afr meter (where the car pulled best) at about 3-4k ohms. With other cheaper kinds of gas it would take more enrichment (closer to 5k) to get it to hit that air fuel ratio. I never had problems with it creeping, and as long as you don't abuse it (the inside of the car isn't exactly harsh) then you shouldn't have any problems. I've had the module on there for over a year with no problems. ----- Original Message ----- From: "Oleg M. Smirnov" <[email protected]> To: "John Caldwell" <[email protected]>; "Rich Blake" <[email protected]>; "a2-16v-list NEW" <[email protected]> Sent: Tuesday, October 22, 2002 12:39 AM Subject: Re: [a2-16v-list] Fuel Entrichment Module I don't trust pots either... There used to be a nice design on angband.org, but the page has been taken down. Here's a link to a snapshot at archive.org. Unfortunately, archive.org doesn't archive images, hence no circuit diagram: http://web.archive.org/web/20001215001000/http://www.angband.org/dan/fueler. html Anyway, the nice bit about this design is the network of 4 resistors wired through a bank of DIP switches. The switches allow you to set an exact resistance from among 16 possible values. I thought it was a better idea than having a pot. Cheers, Oleg On Tuesday 22 October 2002 08:59, John Caldwell wrote: > put the pot inside the car so you can adjust on the fly. Depending on your > set up, any where from 3-4k ohms should give you the best results... 1k > won't do much. I haven't had any problems with vibration. > > > ----- Original Message ----- > From: "Rich Blake" <[email protected]> > To: "a2-16v-list NEW" <[email protected]> > Sent: Monday, October 21, 2002 2:40 PM > Subject: [a2-16v-list] Fuel Entrichment Module > > > After some research and development (no diagrams on the internet), I have > > been able to make a CIS-E fuel enrichment module from scratch. Autotech > > and > > > Techtonics sell these for over $100. I built mine for about $15 and some > > time. I installed it tonight and bench tested it in the car, checks > > good. I will try the butt dyno tomorrow. I used a 10K pot but now I > > think I > > will > > > go with a 1K resistor because the pot will probably adjust itself under > > vibration. I know that the Autotech module is adjustable for different > > engines, if anyone has one I would appreciate some resistance readings > > for reference. > > > > Rich Blake > > > > _______________________________________________ > > a2-16v-list mailing list > > [email protected] > > http://mail.a2-16v.com/mailman/listinfo/a2-16v-list > > For list archives, see listinfo link above. > > _______________________________________________ > a2-16v-list mailing list > [email protected] > http://mail.a2-16v.com/mailman/listinfo/a2-16v-list > For list archives, see listinfo link above.
