deuce8ernerozero Posted January 8, 2014 Share Posted January 8, 2014 (edited) I am about to hook up my o2 sensor and start autotuning. I know the lean cruise around 2300 is rich. I plan on tuning that to what the car will tolerate. car is 77 280z n42/n47 stock. tune is based on gavins tune. I've been told the upper right section is accurate and ideal. I have no idea what to do on the lower left except for my idle 13.2 and cruise2300@55mph in 5th gear. aft.bmp Edited January 8, 2014 by deuce8ernerozero Quote Link to comment Share on other sites More sharing options...
Metro Posted January 8, 2014 Share Posted January 8, 2014 You could lean up your cruising bins a lot more, I run 14.7 to 15 in my cruising bins (45-70kpa, 1700-3000rpm) and you could probably go even higher. Just try it out and see how your engine responds. Quote Link to comment Share on other sites More sharing options...
deuce8ernerozero Posted January 8, 2014 Author Share Posted January 8, 2014 Thanks for the tip Metro! Quote Link to comment Share on other sites More sharing options...
deuce8ernerozero Posted January 8, 2014 Author Share Posted January 8, 2014 Like this? metro.bmp Quote Link to comment Share on other sites More sharing options...
Metro Posted January 9, 2014 Share Posted January 9, 2014 Something like that yeah. Just check the logs for what KPa and RPM your engine cruises at and make adjustments. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted January 10, 2014 Share Posted January 10, 2014 Light load from idle to about 4k can handle stoich to 15.x. Above that I would taper it to 13.5 by 5500 and then levelled at 13.5 to redline. The x depends on what you are happy with and how much your closed loop fuel control wobbles. You say O2, I assume you mean wideband? You can't really do lean burn with a narrowband sensor. Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted January 10, 2014 Share Posted January 10, 2014 (edited) Like this? I think your 700 column is too rich down lw and your transition from 3200 to 3700 is too sharp. Try tapering it out higher. Your load columns are not very even. I am not sure why you did that but going from 15.0 to 13.3 or so in ~700 rpm is gonna be obvious when driving. Edited January 10, 2014 by WizardBlack Quote Link to comment Share on other sites More sharing options...
deuce8ernerozero Posted January 10, 2014 Author Share Posted January 10, 2014 I am running a 9.1-19.1 wideband. Its kind of hard to be smooth on a 8x8 table. I made some adjustments. I started out by leaning everythin by .5. The purpose behind that was ethanol afr offset. Im running on no ethanol now. I tried to space things out. I'm going to disable autotune around my idle. It has already been optimised with the map sensor. Keep in mind this is a starting table. AFR3.bmp Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted January 11, 2014 Share Posted January 11, 2014 (edited) Honestly it's easier to just tune it rather than use an auto tune feature. Even a basic, fundamental understanding of tuning will put you ahead of auto tune algorithms. You already have enough capability to do it. Get a buddy to ride shotgun and hold the laptop up for you. You do your best to modulate throttle to nail the load row dead even and then both of you make mental notes about where to dial it up or down a bit. A little goes a long way once you get close. Obviously, set your tune a tad lean and let the closed loop dial it toward a richer (yet leaner than stoich) target. Edited January 11, 2014 by WizardBlack Quote Link to comment Share on other sites More sharing options...
deuce8ernerozero Posted January 11, 2014 Author Share Posted January 11, 2014 I finally got my wideband welded in. I got everything wired up. I calibrated the sensor. I started the car. I was ecstatic. The gauge will not come off of full lean. The wideband controller was DOA. I'm less than happy. dont buy bpsx or apsx widebands guys Quote Link to comment Share on other sites More sharing options...
WizardBlack Posted January 11, 2014 Share Posted January 11, 2014 (edited) I finally got my wideband welded in. I got everything wired up. I calibrated the sensor. I started the car. I was ecstatic. The gauge will not come off of full lean. The wideband controller was DOA. I'm less than happy. dont buy bpsx or apsx widebands guys Sorry to hear that. I know it can be so aggravating when you are so excited to get rolling and then that sort of thing occurs. Getcha an innovate wideband. Edited January 11, 2014 by WizardBlack Quote Link to comment Share on other sites More sharing options...
deuce8ernerozero Posted January 11, 2014 Author Share Posted January 11, 2014 It is on the list. beleive that. Quote Link to comment Share on other sites More sharing options...
motomanmike Posted January 28, 2014 Share Posted January 28, 2014 Get familiar with the shortcut keys on your laptop for tuning. Q and W will be your best friend. Quote Link to comment Share on other sites More sharing options...
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