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pilotjcd · Joined: 14 May 2007 Posts: 10

1998 columbia with 1,100,000 miles. Engine ate the number one piston. I have decided to go with the reman. I have a 360/430 hp and was told i could increase the hp to 500 or many options inbetween at no extra cost. The mechanic recomended 475 hp. Will having the extra hp availabe decrease my fuel econ? I would think that it would burn the same gas as before at the same weight and speed.

bob h · Joined: 15 Oct 2006 Posts: 675 Location: Nb

pilotjcd wrote: 1998 columbia with 1,100,000 miles. Engine ate the number one piston. I have decided to go with the reman. I have a 360/430 hp and was told i could increase the hp to 500 or many options inbetween at no extra cost. The mechanic recomended 475 hp. Will having the extra hp availabe decrease my fuel econ? I would think that it would burn the same gas as before at the same weight and speed.

how do you suppose the ecm makes more horsepower?

i wouldn't recommend gas in a reliabilt, unless its a s60g

MAINTENANCEMAN · Joined: 30 Oct 2007 Posts: 10

You have to be careful when increasing horsepower of an engine since most of the time it will also increase the torque.
Make sure your transmission and clutch can take the increased torque as you may cause damage.
As far as increasing the hp and the effect on fuel usage that will depend on how you drive the truck.
If your driving habits don't change then the increased fuel usage should be minimal. The reman may run much more efficiently and you may use less fuel.

Bandit102 · Joined: 22 Nov 2006 Posts: 251

Bob, I love your answers. Many times they're just over the head of someone who just doesn't know. Anyway, when you increase horsepower, you increase fuel consumption. The thing about a turbo diesel is that if you continue to add fuel and air, they continue to make more and more horsepower, right to the point that they burn themselves down. More horsepower equals more fuel consumption.

bob h · Joined: 15 Oct 2006 Posts: 675 Location: Nb

Bandit102 wrote: Bob, I love your answers. Many times they're just over the head of someone who just doesn't know. Anyway, when you increase horsepower, you increase fuel consumption. The thing about a turbo diesel is that if you continue to add fuel and air, they continue to make more and more horsepower, right to the point that they burn themselves down. More horsepower equals more fuel consumption.

i thought it was a rather simple question; fuel = power ....... more fuel = more power

of course..., in a given engine; if you have 2 - 500hp ddc s60 engines sitting side by side on the dealer lot, there may be as much as 50 hp difference between the two

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