About fuel cells calculation
Moderator: Gaskleppie
- honda69
- Posts: 15
- http://phpbb3styles.net
- Joined: Thu Jul 08, 2010 6:07 pm
- Location: Belgium
About fuel cells calculation
My afr value are great but my graph is not smooth. I want to know how eCtune calculate the fuel value with the selected cell and the three around of it to change the good value and smoothing my graph. thanks for helping me
- Bindegal
- <font color=green>eCtune Authorized Tuner</font>
- Posts: 752
- Joined: Mon Jun 04, 2007 2:59 pm
- Location: Denmark
To my knowledge, the fuel/ignition values are taken from the cells and interpolated. This is all part of the standard Honda code on which eCtune (and others) are based. However, sometimes you´ll find that the engine just \"wants\" some odd twists to the fuel curve. Often I have tried to even everything out, only to find that it´s not working... This can be especially true for some engines with wild cams or some intake systems. Remember this is all based off a MAP sensor and not actual air flow. So which ever oddities in the engine causing different air flow for various rpm/MAP values, will be shown in the maps if you take the time to tune everything spot-on perfect. As long as you dont have fuel curves crossing, dont worry too much about it Especially if the AFR is good and the driveability is nice. /Allan
Regards, eCtune Team eCtune Authorized Tuner Location: Copenhagen, Denmark
My driveability is nice especially since i have retarded my stock cam to 2° retard. The change was impressive from low to high rpm. there is my g-tech result. I'd do more testing with cam gear in the next days Thanks a lot Allan you really helped me
- Attachments
-
- The black curve with stock cam gear The red curve with aem cam gear and 2° retard
- gtech 2° retard aac.JPG (160.1 KiB) Viewed 6848 times
- TopMountGSR
- <font color=green>eCtune Authorized Tuner</font>
- Posts: 606
- Joined: Tue Apr 29, 2008 11:30 pm
- Location: Frankfort KY
- Contact:
You need to make the map symmetrical. Spend time manually smoothing your map. Most of the time when its calling for a dip or a spike in the lines, look above or below it, chances are if its telling you to pull a bunch of fuel, a cell close by has to much. Don't try to hit exact target air fuels, just a safe range throughout the column. Give and take, do whatever it takes to create a smooth map. The cars drive ability will reflect it.
DKGoodrich EFI Tuning Solutions eCtune Authorized Tuner Frankfort, KY, U.S.A. 859-421-3334 http://www.dkgoodrich.com
AWESOME thank to you Dan, my graph look better and the afr stay to good value
- Attachments
-
- Here is my last update
- new graph.JPG (151.48 KiB) Viewed 6819 times
-
- 1st step
- 1st step.JPG (147.98 KiB) Viewed 6819 times
Last edited by honda69 on Thu Aug 05, 2010 5:17 am, edited 1 time in total.
- TopMountGSR
- <font color=green>eCtune Authorized Tuner</font>
- Posts: 606
- Joined: Tue Apr 29, 2008 11:30 pm
- Location: Frankfort KY
- Contact:
haha, glad to see you getting it, amazing isn't it. I see quite a few spots still left you can keep ironing out. Your doing an excellent job however. The symmetrical trick is one of the best I've learned, its an easy way to tell who knows what on here. Rough map, rough and 'notchy' feel. Stay away from tuners that don't understand this. Also if you ever can not get rid of a wild fuel curve that it keeps demanding.. Play with your injector offset, it will disappear..
DKGoodrich EFI Tuning Solutions eCtune Authorized Tuner Frankfort, KY, U.S.A. 859-421-3334 http://www.dkgoodrich.com
Did you feel your car was rough before you started smoothing it out? The difference in graphs is like night and day... Is there a big noticeable difference in driveability? Up intill last week I would have just gone with target AFR's but now after reading this its shown me that keeping the AFR's bang on will have the injectors pumping iraticly. Common sense when you think about it!
My Car Is A Hybrid; It Burns Petrol And It Burns Rubber.
Before smoothing, my driveability was not so bad. Now i can't realy feel it because the most change i have do was cell by cell when driving I didn't put previous Cal to feel the difference The only change i have noticed it's when i shifting to the second gear at wot my tyres burn a little. i hadn't it before but i'm not sure it's for that because my IAT was low today. In the next days i'll try with my Gtech to see any change and i'll post my result
- JaredKaragen
- Posts: 1504
- Joined: Fri Nov 23, 2007 4:00 am
- Location: Bay Area, Ca
- Contact: