Received this message from another Civic 1.8 owner...
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I have a hatch civic 1.8 (european model) with R18A2 engine, since you are from Canada I guess your is a R18A1 or some as mine?
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I'm honestly not sure. How can I tell?
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Mine has a 6 manual speed gearbox, but yours has 5 manual right?
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Correct.
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I think you have the same eco cam system that saves fuel in low load conditions from 1500-3500 rpms (i-vtec engaged)...
This eco zone is more easy to maintain over high speeds (50-70mph) since it's easier to maintain steady low load...
But I rarely do highways, in fact my average speed (SGII and onboard computer) is 33 km/h = 20.5 mph...
So I don't know if I should try achieve eco-cam every time I can, or should focus on steady gentle driving...
Since this engine doesn't have substancial pumping loses, (in eco mode the drive by wire opens wide the intake buterfly throttle) should I acelarate faster (99% load) to achieve eco-cam cruise speed, or acelarate more slowly (83% load)?
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I'll admit I'm not familiar with the eco mode of this engine, though mine also supposedly has it.
If it's true that pumping losses are dramatically reduced, then there should be less benefit to using high load/low RPM acceleration techniques compared to a typical gasoline engine.
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Also when cruising at low speeds, If I have the eco cam engaged (low consumption) shoeld be better than to do a short P&G?
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We'd need to see a BSFC map (brake specific fuel consumption) for this engine to be able to say for sure, but it's likely that at variabe low speeds P&G would still win (it does even in Honda's lean-burn cars), and at cruising speeds, it may be better to just drive with load on the eco cam.
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Don't know if you know, but it is possible to connect a wire with a led that lights on whenever you are on eco cam.
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I'm not sure, but that would be excellent. It
may also be possible to program the SG2 to display when the eco-cam is active, but I'm not sure that info is communicated to the OBD-II port.
More info... time to do some reading...
Technical Overview of Honda's new R18 i-VTEC Implementation
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Now the R18A engine can truly be seen as a 'dual mode' engine with clear-cut normal driving and 'economy driving' modes.
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