bimbert84 wrote:
transamz9 wrote:
I don't care how you look at it , it takes torque to keep the RPM's up.
It takes torque to keep the vehicle speed up. RPMs measure engine speed, which can easily be increased by downshifting in the transmission.
transamz9 wrote:
A gas motor can't make the torque at highway speeds to keep the RPM's up when put under a load without going out of it's optimum RPM range.
Of course it can. The whole point of a transmission is the put engine RPMs in the optimal range at whatever speed the vehicle is moving. It's just that with a gas engine, those RPMs will (usually) be higher than with a diesel.
-- Rob
The RPM's I'm referring to is at the rear wheels (on the ground where it counts). This is what I've been talking about. These motors are TUNED to run their best at their intended use RPM's. That RPM in vehicles is 1500-2000 give or take. Marine engines (gas) 5000-6000 in must cases. Lawn mowers is 3500-3800. So on and so on. My Corvette has no problem running around in the 1500-2000 range. Even on take off it shifts at or before 2000 rpm's.
It would be different if they would build truck engines like they use to. Now they just use the same engine and tune it differently. The old 454 such use to just be able to lug right on up a hill.
