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did it lose 70hp over stock, or 70 hp below what the smarty normally adds?

My buddy has an 04 305/555 and last fill up he put in 23 gallons and went 550 miles. geez, wish my 04.5 would do that. Other than the engine, our trucks are exactly the same.

 

I've been wondering if an '04 computer can be fitted to an '04.5-'07. This would get rid of the third event.

Also, the third event can't be just to keep the cat hot because they had cats on the '95s with no problems about clogging that I know of.

John

 

I'd gladly give up 70-100 HP for 3-5 extra MPG. I think many others probably would too. I don't know how it all works but I would think if someone could come up with a way to kill one of the events and add some power back by some other method (maybe pressure) then this would be the hottest selling mod to ever hit the diesel world. 15 mpg @$3.50/gal is getting real old.

 

That's exactly what I recall!

 

That 3rd injection event is also why the 04.5+ trucks make a lot more power with a programmer than 03-04 engines. It's conceivable that an 04.5+ could have that 3rd event removed and the 2nd increased to compensate for the power.

Andy

 

removing the 3rd inj and adding more to the 2nd will only lose hp and still keep your same mileage because the amount of fuel used in the 3rd event is very small from what I understand.

 

Yes - the fuel volume delivered during the 3rd injection event is insignificant and only happens over a defined set of engine operating parameters (i.e. - between 1X00-2X00 RPM, coolant temp, MAP, etc.)

 

Really? How does my 2003 run with two events then?

Andy

 

its an easy fix just get a ecu from a earlier truck and plug it in.

 

I did not say it would not run. I said you will lose hp. The post said they wanted to remove the 3rd event and add more to the 2nd. In order to keep the same hp you would have to add more fuel to the 2nd and IMO I don't see any way you would see better mpg's. The fuel injected in the 3rd event is very small and I would think it would take more fuel in the 2nd event to make up for the loss.

For example, if your piston fires at top dead center on a regular diesel you have x amount of force pushing the piston down. Now you add the 3rd injection after top dead center you actually have another explosion (so to speak) that adds even more force down on the piston. You already have high amount of pressure and heat from the 2nd event so it takes very little fuel to make a big difference.

 

will not work. different ecm programing

 

pretty sure I read a post by Bob Wagner saying that the o3-04 and 04.5 and up ecms were not able to be swapped -------yet.

 

I heard thats why the engine oil gets black so quick

 

The 3rd event is both power and emissions, but not for the CAT. The emissions portion of it is the in-cylinder EGR solution. The CAT will work fine as long as EGT's periodically get over 800 degrees.

All the CR engines can be reprogrammed to run on a single injection event and return economy comparable to a 12V at the same power level. However, it is not a simple programming change. Cam profiles and timing also need to be changed to achieve the desired effects.

On one hand you gain better economy, on the other you loose the power profile of the CR engine. Its a zero sum game.


The only question that remains is whether the modifications can or will ever be offered on a mass basis. Since these mods will significantly impact the emissions of the engine it gets very deep into the legalities of meeting federally mandated emissions regs.

Until there is significant pressure on the EPA to change the way they view and approve emissions these types of mods will only be available to a very small test group.

The problems are not technical, they are bureaucratic.

 

If you mess with your truck the polar ice caps will melt. Al Gore told me that!