economy tuning
#76
EvoM Community Team
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The Open Loop Throttle Low has the 500-3,000rpm set to 15%, and 3500-4000rpm set to 20%. This gives me the low throttle percentage I needed to get the car over the load values from the Load #2 map, and over the throttle percentage in the Throttle Low Load map. If I didn't adjust the Throttle Low Load map, the car didn't respond to the changes I made in the fuel map.
Edit: sorry, I see now that on the IX 15 rom these values are percent, but they are volts in some earlier roms.
Last edited by fostytou; Mar 21, 2008 at 07:41 PM.
#77
EvoM Guru
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Hey guys,
I have a long drive coming up and wanted to get this done!
One question:
Is it still worthwhile running a 15.8 AFR in the cruise part of the map (30-80load, 2000-3500rpm) WITH EGR?
Or did we decide that if you have EGR then don't bother?
Also:
If I do this mod do I need to worry about my CAT?
Cheers
D.
I have a long drive coming up and wanted to get this done!
One question:
Is it still worthwhile running a 15.8 AFR in the cruise part of the map (30-80load, 2000-3500rpm) WITH EGR?
Or did we decide that if you have EGR then don't bother?
Also:
If I do this mod do I need to worry about my CAT?
Cheers
D.
#78
Evolved Member
iTrader: (17)
Even with EGR, this is a benefit. Most people think that the higher EGT's being recirc'd will hurt the gains from the leaner mix but no matter how you toss the dice...you're using less gas on your trip. Aslong as EGT's stay below 1500*F for long periods of time, you should be ok. If you start to hear some misfiring along the trip, its probably from prolonged EGT's. I know long distance drivers that run in the 1500* range for over 16 hours without fail, granted the car is tuned quite well for this stuff.
I'd set it for around 15.5:1 and be done with it, thats where I set my zeitronix NB simulator and it seems to be a good, well rounded setting for EGT's and fuel economy.
I'd set it for around 15.5:1 and be done with it, thats where I set my zeitronix NB simulator and it seems to be a good, well rounded setting for EGT's and fuel economy.
#80
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I shouldn't try any of this without a WB huh? The LC-1 is cost effective, but I really would like to know if it can do the narrowband switching point. ECU+ has the variable front O2 switching point, anyway we can work this into EcuFlash?
#81
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Last edited by Jack_of_Trades; Mar 28, 2008 at 05:58 PM.
#83
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i know a guy running in open loop (not stock ecu though) cruising at 17 afr, egt at 750-800 deg C, with no prob.
i guess you could even go up to 16 afr with egr... but to be on the safe side, if you don't have egt reading, 15.5 is the best
i guess you could even go up to 16 afr with egr... but to be on the safe side, if you don't have egt reading, 15.5 is the best
#84
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OK I got done setting it up the way you said on my Evo Ix. And set it to switch at 15.5 afr, but the real time data on my gauge keep on going from 15.9 to 13.7 at study cruise not like when the stock sensor was connected your gauge will read 14.7 at cruise. Now for the last 3 day I am getting error code # P0134 ( Oxygen sensor circuit no activity detected bank 1) I thought the zt2 will send a default 14.7 afr to the ecu! how can I get around this. #2 does the narrowband output pin should be set to 0V-1V as it is now or going for 0V-5V will help. Thank you for taking the time to help me out guys.
#85
been pointed out to me that the innovate software does allow you to alter the switch point of the NB simulator.
Has anyone tried changing these settings?
http://i64.photobucket.com/albums/h2...yfox21/lc1.jpg
Has anyone tried changing these settings?
http://i64.photobucket.com/albums/h2...yfox21/lc1.jpg
#86
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hmmm, ooooh that's how you do it w/ the programmer. Yes, I've used that screen a long time ago when I hooked my LC1 up to the OE NB input on the ECU. I just used it to emulate the NB and take the whole NB sensor out of the loop. It worked great. I didn't think about the fact that you could use it to change the switch point.
#87
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I wouldn't suggest messing with the open loop alterations without a WB personally. Zeitronix can do the NB switching point very well and very easily and I consider it to be superior product for the $$$. All depends if you ever want to use the WB for anything more than JUST a WB reading though.
I don't think i connected the NB wire on my ZT-2 when i installed it, but i may do it if it's a better option than adjusting fuel/tps maps. I'm just not sure about lean idle with 280 cams.
#88
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Does the switching point apply to any closed loop operation? Meaning if you set it at 15.5, does that mean that your idle will be 15.5 as well as low load cruise?
I don't think i connected the NB wire on my ZT-2 when i installed it, but i may do it if it's a better option than adjusting fuel/tps maps. I'm just not sure about lean idle with 280 cams.
I don't think i connected the NB wire on my ZT-2 when i installed it, but i may do it if it's a better option than adjusting fuel/tps maps. I'm just not sure about lean idle with 280 cams.
#89
Evolved Member
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DO NOT use the 0-5v output!!!!! Unless you want to fry your ECU! The 0-5v output has NOTHING to do with the narrowband simulation. That is for a WB "analog output" for a stand-alone ECU. Its a multi-use output which you set to do one or the other.
Last edited by Jack_of_Trades; Mar 31, 2008 at 02:56 PM.