whats the difference between the stock(black) cps and the "improved" (blue) cps from international? why do people prefer them? what is the cost difference between the two?

 

I believe there are pros and cons to it. There have been a few threads on this lately. Try a search on it. I think if I remember right it changes the timing somehow???? Some like it some don't. Can't tell the cost, I never bought one.

 

Blue is supposed to advance the timing 4 degrees is what Ive heard.
Definitely buy it from International if you need one.
Just bought a black one.
Ford wants about $150
International is about $100

 

does it help develop more power in kind of way?

 

Don't take this as gospel, but, in general terms, advancing timing can help produce more power. Now, where that power comes on in the powerband is a different story altogether.

Sometimes advanced timing is a good thing, sometimes it isn't. Your vehicle will tell you what it likes after you've done it.

I'm looking at having to replace my CPS also. I didn't know that the OEM timing is unchangeable. I'm used to performance mods on gas engines. Diesel performance is a new concept to me, even though I've had my truck for 4 years.

This little bit of information, (OEM black vs. IH blue), has helped me. I may get one of each, just to see what the difference might be.

 

I bought my CPS (black) today, from my local IH supplier. Paid $106 for it. I must admit, I talked them into an additional discount, otherwise it would have cost $120 before tax.

The part number for the black CPS is 1825899. This one is for an 8-cylinder engine. The blue CPS, #1807339C93, that was listed in another thread, is for an inline 6-cylinder engine.

According to the parts-counter staff, if you have an 8-cylinder, you need the black CPS, not the blue one. Those guys are great. I'm sure they've heard all the dumb questions from diesel-newbies like me, but they answered my questions like it was the first time they were asked.