trying to get good fuel economy

K-Series Programmable ECU Calibration updates / downloads
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1illdc5
Posts: 11
Joined: Mon May 19, 2014 8:05 pm

trying to get good fuel economy

Post by 1illdc5 » Wed Aug 20, 2014 6:45 pm

been tuning myself, self taught so try not to bash on me to hard... but just looking for advice or a lil help if possible...

i know its a lil all over the place.....
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03' rsx-s k20a2
k pro v3
k tuned fuel rail
k tuned tps
2.5 cat back
aem intake

tkane4389
Posts: 31
Joined: Wed Jun 06, 2012 5:02 pm
Location: Kansas City

Re: trying to get good fuel economy

Post by tkane4389 » Sat Aug 30, 2014 3:01 am

Hard to say anything about the datalog without the calibration that was run to pull data. Your fuel curves should be relatively smooth, and the cam angles you use at part throttle play a huge roll in how your fuel economy will turn out. Stock honda cams have almost no valve over lap so 20-30 degrees of advance at part throttle is very good, while after market cams will have much more overlap and require less to almost no cam advance at part throttle to provide the same fuel economy.

Hope this helps, lmk if you have any other questions.

1illdc5
Posts: 11
Joined: Mon May 19, 2014 8:05 pm

Re: trying to get good fuel economy

Post by 1illdc5 » Mon Sep 01, 2014 12:55 pm

I'm using toda header, intake, exhaust, stock cam.
So basically just keep tuning till I get a smooth curve on my fuel around roughly 15.0 air/fuel ratio at part throttle?
I was told I could lean it out around 15.2 ratio for good economy at part throttle..
03' rsx-s k20a2
k pro v3
k tuned fuel rail
k tuned tps
2.5 cat back
aem intake

tkane4389
Posts: 31
Joined: Wed Jun 06, 2012 5:02 pm
Location: Kansas City

Re: trying to get good fuel economy

Post by tkane4389 » Tue Sep 02, 2014 8:41 am

You need to keep the fuel centered around 14.7 at part throttle. You can lean out e85 to around 15 at part throttle and still be alright, but i always tune pump gas to 14.7. Stick with overlap of the cams for fuel economy, your setup shouldnt be very inefficient anyways.

1illdc5
Posts: 11
Joined: Mon May 19, 2014 8:05 pm

Re: trying to get good fuel economy

Post by 1illdc5 » Mon Sep 29, 2014 4:38 pm

Thanks I'll keep it around 14.7 my air fuel was around 11.5 is why I started adjusting it...
03' rsx-s k20a2
k pro v3
k tuned fuel rail
k tuned tps
2.5 cat back
aem intake

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