Quote:
Originally Posted by jcolley
Quote:
Originally Posted by Fubar_M3
How about don't lug the engine......... just a thought.
Engines designed to make peak power at 8k+ rpm's are not designed to produce alot of torque low in the rpm range. Try driving around in a lower gear for lower speeds.
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That's the equivalent of saying "Hey Doc, my neck hurts when I turn this way" and being told "Well, don't turn it that way."
True, peak BSFC won't be found when lugging, but max fuel economy is. If he hadn't, he wouldn't have heard the sound and been warned of a potentially problematic internal condition in the engine. Carbon deposits reduce heat transfer to the piston and valves and create hotspots in the engine as well as reducing air flow on the intake stroke. This last point is problematic as the DME runs open loop fueling on full throttle and relies on the VE map entirely to set fueling properly.
What's interesting is that one DME calibration may allow it to happen and one won't. |
No, it's more like driving the car the way it was engineered.
I agree to the point the preignition is bad and fixable. But lugging the engine is just bad practice.