powerstroke V8 to V4

[sevenmalards]

Originally Posted by pasquali_988

Ok, I am new here. I may be one of the few people that prefer fuel economy over horsepower

You can still probably find a YUGO around somewhere

[sevenmalards]

Originally Posted by pasquali_988

without a muffler or cat, the 7.3 sound cool under load and the turbo whistles allot. It does sound like a helicopter farting at certain speeds. You can actually hear the exhaust hitting the paddles of the turbo.

Are you talking about turbo lag? Get a Wicked Wheel and it will go away

[dieseldan2005]

My 99 psd was the exact same spec as my 01 and i consistently got 19 to 20.5 on the highway going 68mph on the cruise. Truck was bone stock. This calculation was done my a hand held calc, not a lie o meter. I could average over 650 miles per 38 gal tank.

[sevenmalards]

Originally Posted by dieseldan2005

My 99 psd was the exact same spec as my 01 and i consistently got 19 to 20.5 on the highway going 68mph on the cruise. Truck was bone stock. This calculation was done my a hand held calc, not a lie o meter. I could average over 650 miles per 38 gal tank.

Well Hoooo Doggie for you!

I get 14-15 but I don't care.

[dieseldan2005]

Originally Posted by sevenmalards

Well Hoooo Doggie for you!

I get 14-15 but I don't care.

well that was on my 99. I wasn't trying to brag, just showing that higher mpg can be found in a psd. The best i have gotten outta my 01 is 17 which is still good.

[jbridges1]

Read Boyles law again. Even though you are not injecting fuel into the cylinder which acts as a lubricant / coolant. You are still taking in air which has been compressed by the turbo which in turn is compressed by the piston within the cylinder. Unless of course you have some magical way of suspending the piston within the cylinder!

[mrnecsteve]

In the setup that Pasquali is interested in,Both the intake AND exhaust valves are SHUT DOWN. The existing air compresses...then decompresses. repeatedly. many times.

[jbridges1]

Originally Posted by mrnecsteve

In the setup that Pasquali is interested in,Both the intake AND exhaust valves are SHUT DOWN. The existing air compresses...then decompresses. repeatedly. many times.

So how do you stop the valves from moving?

[redstroker_2002]

You will fry that 7.3 buy a racer if u want fuel mpg

[sevenmalards]

Originally Posted by jbridges1

So how do you stop the valves from moving?

You beat me to it!
Yes, how do you stop the valves from moving? They are run by the camshaft, incase you don't know where that is, it's DEEP in the engine behind the water pump. It's not something you can just "turn off and on" when you want power, or good mileage. Or maybe you put the strongest valve springs on the valves to keep them closed when the camshaft wants them open....oh wait then you'll bend your pushrods......what to do, what to do....