Why do engines have two Hp ratings????? Like a 430/475 for example.

 

I do believe that is no cruise/ cruise control on settings.

 

They hook up the computer and can choose between 430 ort 475 HP. All it does is feed more fuel to the injectors, plain and simple.

 

Your choice. My mech says turn it up and don't use it, but have it if you need it. Other say you'll get better mpg leaving it down. I hope some dis cuss this here.

 

I turn my 475 up to 550 and no significant change in mpg,but defintely increase in power :lol:

 

If your set for 475 then with the cruise control on and hitting a hill you'll probably get 4.0 mpg. If your set for 550 then you'll get 3.0 mpg.

I have a computer in my truck that measures mpg and this was the first thing I noticed. More fuel = lower mpg. If you use the cruise you can't control it. The cruise will put the pedal to the metal.

 

Right that's 430 on the pedal and 475 on cruise but why do they do that? I understand you need max HP on cruise so you can pull the hills without shifting, but why not 475/475? I don't get it.

 

It could be the mega fleets, were getting tired of tore up drivetrains from inexperienced drivers. They may have complained enough that the engine maker came up with a solution.

That's my educated guess anyhow. :?

 

It's only 430 on the pedal if you don't push it down all the way. If you do then it's 475 and more fuel.

Same as a car with a 4 barrel. Put a 6 pack on it and you have more horsepower and less fuel economy if you use it. Don't push the pedal to the floor and you can have the same fuel and performance as the 4 barrel.

Your basically installing a larger hose with a valve. Don't turn the valve on all the way and nothing will change but a cruise control will always turn the valve on full.

 

That's because the CC is "smarter", than the average driver, and would use only what nessesarely! :wink:
CAT's btw, use a "soft mode" which gives it 2-3mph , from a "set" speed.
For example, if i set my cruise on 65mph, it will only come to a full throttle at about 62mph...