QUOTE(wild_card_my @ Aug 19 2011, 03:18 AM)
guys guys, i hate my FC, but i always drive at 2000 RPM, even when accelerating...
if i use the cruise control when accelerating it will go to 4000RPM until i reach my desired speed, which is usually 70kmh, top gear, 2000RPM
have i been making a mistake? since it is a high rev engine should i accelerate at high rpm and cruise at low RPM?
thanks
I don't get what you mean by accelerate at high rpm and cruise at low rpm.
You should not use cruise control in hilly area or roads with lots of cornering. Cruise control are meant for highway drive only where its generally a straight road.
In city area with cornering, slowdown, traffics, etc will actually increase your FC consumption as the ECU struggle to maintain its desired speed by increasing and decreasing acceleration constantly and inefficiently. On LONG stretch of straight road, ECU need only increase and decrease very slightly and efficiently to maintain cruising speed....thats what cruise control are meant, not city drive.
When you want to cruise on a long straight road (with bends ok, since speed not reduce, corner cannot lar), switch on the cruise by pressing the button. Then accelerate slowly as usual until reaching your desired speed. Once you reach your target speed, set the cruise speed on by pushing it downward. Thats abt it.
Nothing to do with increasing RPM or anything. Your RPM would NOT should up to 4000 if accelerate up to 70km/h. RPM will react as usual, maybe with a initial spike of a little rpm increase before stabilizing at 70km/h rpm.
Oh...btw, travelling at 70km/h, not very FC saving. The general best is 80km/h to 90km/h. However after driving PE for a couple of months, with its weaker lower end torque but ok mid torque but need 6.8k rpm to reach max torque.....I think travelling at 100km/h save more than 80km/h. Technically wind drag will increase FC with higher speed but I think the higher end torque neutralize that disadvantage and sort of help it better than 80km/h.