Why diesel trucks?
Judging from my other two posts a lot of folks that responded drive DRW diesel trucks to carry the heavier multi slide campers. I understand the DRW for heavier payload but why diesel? Just looking at...
Forum Discussion
jimh425 wrote:
Torque and hp don’t always go together. As most of us know, you can create lots of hp at the expense of torque, but in the same gasoliine engine both numbers generally go up if you raise one unless you change the cam which is almost never done anymore.
Technically they do. It is HP that generate the torque, but gasoline engine have very steep power/torque curve, when diesels have it flatter.
Let's say we compare diesel and gas engines both having 100 hp and both having the same gearing.
So when you cruise at 2000 rpm, the diesel will deliver (fictional) 100 ft-lb of torque, but gasoline engine only 40 as it needs 3500 rpm do get to 100 ft-lb curve.
Final result is that when you step on it slightly - the diesel will pull like a train, while gasoline engine need to drop gears to get to 3500 rpm for the same torque.
Diesels of last decade are IMHO under-geared. My Ford drops from overdrive at about 1200 rpm, when my (4 cylinder) diesel sedan will pull on 7th gear and 1050 rpm.
Don't try to run gasoline engine at those rpm on high gears.
