HP Ratings for RTLO16913A

You asked for the maximum power at 1650 ft-lbs. I'm sure you could program an ecm to hold 1650 across the entire rev range, but generally torque increase as rpm drops, peaking around 1000-1200 depending on the engine. Modified engines may have the peak at a higher rpm because the larger turbos may not be provide sufficient boost down there. Torque peak is generally at the point of maximum volumetric efficiency. A fancy way of saying "Where it breathes the best." And it varies significantly based on engine configuration, especially in naturally aspirated engines, which are much more dependent on resonances in the intake and exhaust for peak cylinder filling.

 

My Mentor took a place mat and a piece of tape and put it over the gauges. Gave the keys to me, and said drive the truck. I understand now.

 

That is the way I was taught to drive a truck by an old truck driver, I was always thankful for what he taught me. So that's the way I always drove, full throttle is nice, yet in a truck that runs, you sure have to know how to use that throttle. Years ago I got the boss mans son's truck handed-down to me, it was a 350 built 375, yet tuned up from that. I suppose I drove the truck for two years to the west coast and back without a problem, them inherited the next hand-me-down from the boss son that had a 400 that had been highly tuned.

My 1st trip out at the old Seven Standard Truck Stop north of Bakersfield I was setting in the old cafe enjoying a meal getting ready to head for home & the next driver of that ruck walks in & wants to know what in the world is wrong with that old truck I passed down to him. I asked what was the problem, didn't the old truck pull real good? He said yes its the best pulling truck I even drove, but I pulled a head-bolt coming out, got it fixed down at Colton, left there coming up that mountain on I-15 & pulled another one & I was running empty.

I tired to give him a lesson on how to drive a truck. But going home he pulled two more head-bolts, that's four head-bolts pulled in one round trip of about 3200 miles. Actually its nice that that was the only damage he did to that old engine. Boss-man changed out the fuel pump on his return & he stopped pulling head-bolts. Seems some people never learn, even after they've attended the school of hard knocks & sought advise. Sure are lots of Cowboys on the road.

 

Lord, I haven't heard anyone talk about the Seventh Standard Road Truckstop for ages.

 

I didn't read all the post, but in an eaton model number the RTLO16913A the 16 is the torque (1650). In all transmissions there is a torque rating that the buyer can choose at time of the truck spec. There are a wide range of ratings based on engine, application, and truck model.

 

I was hoping someone else would answer this question, but the short answer is no. Increasing RPM increases the HP to torque ratio, which generally increases HP but not necessarily torque. In most cases, higher RPM results in equal or lower torque, but higher HP since it increases the HP/torque ratio.

Torque is simply rotational force applied. If I then multiply that by the number of revolutions, that tells me how much total energy I used, since energy = rotational force times the number of revolutions. Then if I divide that by time, it tells me the power level, since power = energy/time. This is why HP = torque multiplied by how much the engine turns divided by time (RPM), with a conversion factor to convert power to units of HP (instead of ft-lbs/min).

Another way of putting it is that horsepower is the result of torque, not the other way around. The energy from burning fuel applies force to the piston, which applies torque to the crankshaft. HP is just the measurement of how far (in revolutions) and how fast (per minute) this torque is being applied.

 

I like what you say here. That's how I drive with the extra power I'm making.

 

You guys are genius GURUs

 

My question is-- If your capable of making 7-8-900 hp but can't use it what's the point?