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Old 04-23-2015, 05:39 AM   #5 (permalink)
xavi
EcoModding Lurker
 
Join Date: Sep 2014
Location: Europe
Posts: 66
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tips to sweet spot

I have watch Darin's info, I also post there...
But Darin's Civic is a sedan (heavier makes more coast, drag coef is diferent), mine is the european hatch model, Darin has 5 speed, mine has 6 MT (diferente rpm/speed relation).
Engine wise is the same I guess.
For me, my dificulty in getting the best numbers is that it has 2 behaviours: on eco-cam, out of eco-cam, and the values change too... With eco-cam engaged it opens the throttle butterfly and it lets the intake valves open longer so it can reduce pumping losses...
I have realised, that in "eco-cam mode" is not always the best at low revs, but much better in midd revs...
I enter the "eco-cam mode" with less then 20-25 LOD in low rpms (<1800rpms), but in high rpms (>2500rpms) I can enter "eco-cam with less then 35 LOD... So it doesn't enter eco cam at a steady LOD. It changes with rpm change...
In conclusion, for me that in rare ocasions use highways, and my average speed is only 20 mph, I can enter eco-cam very easily if I pull 3 or 4th gear to 2500 rpms and stay about there... If I try to keep the rpms lower than that it's very dificult to enter eco-cam mode...
Mainly my dificult in finding the sweet spot is about it: high rpm with eco-cam vs low rpm without eco-cam (both with low load conditions).
Also discovered watching the open/closed loop behaviour that it only enters enrichment when full throttle pedal is apllied. If I have the throttle pedal 80-90% down, it doesn't go rich, but the SG is already showing 99 TPS, and it keeps 99 all the way down! I have calibrated the TPS with the open/closed loop, guess that this is normal to show 99 TPS without go rich?
This means that when acellarating even with 99 TPS but not all the way down it doesn't go rich, so maby in this engine i should pull off fast to cruise speed, instead of be very gentle with LOD when pulling?

Thnak you guys for your tips.
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