gaz097 Bronze Donating Members 1,751 Member For: 13y 1m 29d Posted 10/08/15 12:21 PM Share Posted 10/08/15 12:21 PM I had a feeling this might be the case. I see alot of people claim different economy values, and one reason I think is some tuners have taken advantage of this. Link to comment Share on other sites More sharing options...
rollex Member 683 Member For: 10y 3m 11d Gender: Male Location: Australia Posted 10/08/15 01:37 PM Author Share Posted 10/08/15 01:37 PM Running open loop constantly is one way to do it I guess but makes it a bit more difficult to make it run nice in all conditions. Link to comment Share on other sites More sharing options...
turbotrana Member 2,586 Member For: 21y 5m 20d Gender: Male Posted 10/08/15 02:30 PM Share Posted 10/08/15 02:30 PM You would be surprised how well it runs in open loop. In mine it runs like stock. If you dial in the injectors properly where the lambda in base fuel matches (the best you can) to actual lambda then you can command whatever lambda you want via the base fuel map. You can run open loop closer to the lean misfire point in BP98 cause with a narrowband in closed loop needs a bit of room to move above the cross over point (does that make sense) Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 3m 23d Gender: Male Location: @ my laptop Posted 10/08/15 09:59 PM Share Posted 10/08/15 09:59 PM OEM did not get it wrong with cruise mixtures, they target lambda for a reason and fuel economy is not the ideal reason Link to comment Share on other sites More sharing options...
rollex Member 683 Member For: 10y 3m 11d Gender: Male Location: Australia Posted 10/08/15 11:49 PM Author Share Posted 10/08/15 11:49 PM Other than emissions what was the reason? Lots of other manufacturers implement lean cruise Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 3m 23d Gender: Male Location: @ my laptop Posted 11/08/15 12:03 AM Share Posted 11/08/15 12:03 AM emissions is the reason,except for some Direct injection engines which are normally not readily available in Australia due to our fuel quality pretty sure OEM went away from lean cruise due to NOX gases, cars that have it, have a NOX convertor in the exhaust Link to comment Share on other sites More sharing options...
rollex Member 683 Member For: 10y 3m 11d Gender: Male Location: Australia Posted 11/08/15 01:00 AM Author Share Posted 11/08/15 01:00 AM (edited) Yep but in our case there is no good reason to not try it for better economy. An increase in NO compounds for a few random cars won't hurt the environment, when you are talking millions of delivered cars it totally makes sense to not do it though, well you don't have a choice as it won't pass emissions testing. Edited 11/08/15 01:01 AM by rollex Link to comment Share on other sites More sharing options...
turbotrana Member 2,586 Member For: 21y 5m 20d Gender: Male Posted 11/08/15 01:24 AM Share Posted 11/08/15 01:24 AM Yes, main reason are emission reasons. They used to implement lean cruise up till the late 90s, after that they were not allowed. Something to do with higher NO2 emmissions. I have got a lean cruise VT supercharged Late model camira and it cruises around the 16:1. Excellent economy. So if you factor into the extra fuel that needs to be manufactured/transported because of not being allowed lean cruise then you wonder whether they have got their numbers right.With E85 being a cleaner fuel that runs cooler I would think running leaner would still comply. But manufactures still take a while to work it out. They can't even make the latest E85 Compliant Commodores have clean cold starts. 1 Link to comment Share on other sites More sharing options...
rollex Member 683 Member For: 10y 3m 11d Gender: Male Location: Australia Posted 12/08/15 11:40 PM Author Share Posted 12/08/15 11:40 PM So I bought the scanner cable and vcm suite from www.vcmstore.com.au however the item hasn't turned up, no confirmation email and the website is now down. Have I been ripped off? The website made it look like the main australasia reseller?? Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 18y 11m 27d Gender: Male Location: Perth Posted 12/08/15 11:47 PM Share Posted 12/08/15 11:47 PM Call these guys-http://www.vcm-suite.com.au/contact-us/Phone: 03 9763 7599 | Fax: 03 9763 1959 | Email: info@vcmsuite.com.auI have never heard of the other site? Link to comment Share on other sites More sharing options...
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