Not exact matches
My question is closely related to one about a Jag dying
at low RPM, but is slightly different because it only
occurs after refueling and because the problem persists after cleaning the throttle body,...
My question is closely related to one about a Jag dying
at low RPM, but is slightly different because it only
occurs after refueling and because the problem persists after cleaning the throttle body, as suggested by the answers.
Even
at low rpm, the damage can
occur rather quickly.
The 2.5 - liter's peak also
occurs 400
rpm lower than in its smaller - displacement Japanese counterpart — whose peak torque happens
at the same engine speed as the previous - generation U.S. - spec WRX.
The improvements in
low -
RPM performance, which is where most street - driven automobiles operate a majority of the time,
occur in trade for a power and efficiency loss
at higher
RPM ranges.
The switch - down back from high to
low RPM cams is set to
occur at a
lower engine speed than the switch - up (representing a hysteresis cycle) to avoid a situation in which the engine is asked to operate continuously
at or around the switch - over point.
Peak torque
occurs at a very
low 1,350
rpm, which means powering out of corners is quick and easy.
We did feel that in normal Drive mode, upshifts are set a little
low,
occurring at about 2,300
rpm.
Mercedes - Benz says peak torque
occurs at a
low 1,300
rpm, but the turbo takes a while to spool up, so the acceleration feels sluggish.
Its maximum power
occurs at 5800
rpm — actually
lower than the 530i's 6600 and the new 528i's 6500
rpm — but power stays high and vigorous well toward that 7000
rpm.
The increased displacement also contributes to a substantial 22 - percent increase in peak torque, now
occurring at 4400
rpm, a substantial 1700
rpm lower than the previous engine's 6100
rpm.
As can be seen, the best fuel economy (measured in terms of fuel used per horsepower / hour)
occurs at relatively high loads and
low rpm.