So I have been wondering for some time now how our 3rd gen engines achieve EGR. I did some reading and found some generic descriptions of "in cylinder EGR". If I understood it correctly, the exhaust valve closes before TDC trapping exhaust gasses in the cylinder. Since we don't have any fancy active valve stuff on our engine I guess this is controlled by the cam. I also assume that this is the cause of lower economy and the carbon we get as well as the higher EGT we experience. Now for the questions. Is there anyone "in the know" that can confirm my assumptions? Who makes a cam that can put our engines back to a normal combustion cycle? Would any other supporting mods be required?
In Cylinder EGR???
-
March's Cummins of the Month challenge is now open for entries!
1 - 16 of 16 Posts
Formula One Diesel makes the Helix cam. Also I believe Schieds has a cam too.
A year or two ago Diesel Power mag did an article on a cam sap for the CR. They saw a 4mpg increase and a much better running engine with the new cam.
And yes, the third injection event also plays into the EGR roll with the higher EGTs and to keep the cat hot.
MikeyB
A year or two ago Diesel Power mag did an article on a cam sap for the CR. They saw a 4mpg increase and a much better running engine with the new cam.
And yes, the third injection event also plays into the EGR roll with the higher EGTs and to keep the cat hot.
MikeyB
Thanks Mikey, I found the article. That is on my list of future mods. I bet if they have done the grind to not allow exhaust gases to be trapped that the engine oil will also stay a bunch cleaner. Everyone blames the third injection event for dirty oil, but I think it has to do with the EGR strategy.
Joined
·
480 Posts
Had not known about this before- that article available online anywhere? Or anything else on this topic?
Thanks.
Thanks.
Joined
·
3,891 Posts
when i 1st bought my truck , the first mod that i did was an oil bypass system(fs2500). Randy at fs2500 told me that no matter what i did the oil in my 06cummins would still become black right away because of this cam you guys are talking about.
how much would a mod like this run me. any thing to make this truck more efficient(gain mpg's) , im totally with it. and also with this mod i will be able to see clean oil for a longer life.
all though oil is black. oil analysis show oil to be better than my buddies oil after he's had it for 5000mile and mine extended to 30,000miles. yes i said 30000mile as in thirty thousand miles.:thumbsup
Joined
·
1,102 Posts
Very interesting.... I now remember reading something about that too and wondered how it worked. Makes sense, but I can also see how it would cause you to have lose some fuel economy and have more carbon build-up. I would like to know what cams people are running and what difference it has made. I might be in the market for one now.
The F1 cam is about $600, the PDR cam is about the same. The real cost is in the installation. From the article MikeyB was talking about PDR charged 12 hours of labor + supplies to install. About $1600 - $1700 when all is said and done.
You guys in CA might not pass emissions testing if you do this too.
This is still on my list of wants, but long term not short.
If anyone finds any more info keep posting it up, who knows maybe we could do a group buy / install with someone.
You guys in CA might not pass emissions testing if you do this too.
This is still on my list of wants, but long term not short.
If anyone finds any more info keep posting it up, who knows maybe we could do a group buy / install with someone.
Joined
·
3,891 Posts
um correct me if im wrong, but im pretty sure there's no emmisions law out here..................YET!!!!
Joined
·
15,657 Posts
Yep, currently California does not emissions test diesels.
Joined
·
1,098 Posts
I just found the article. Here it is:
Dodge Cummins Diesel Engine Camshaft Swap - Diesel Power Magazine
Dodge Cummins Diesel Engine Camshaft Swap - Diesel Power Magazine
Joined
·
10,324 Posts
Thanks, I read that when I was in Afghan, but never bought it... this was before I owned my truck... but I remember being very impressed with the results.
Joined
·
621 Posts
the f1 cam is 488 bucks , i just bought one and have it sitting in my shop
Joined
·
621 Posts
anyone else have more experience or input?
1 - 16 of 16 Posts
