Honestly there isn't one damn thing that has ever really helped economy wise.I think it is more a placebo like not stomping on it as much and baby the throttle.Doing that I always get better fuel mileage but what the hell is the point to add a part then drive it easy.
It did quiet down and got rid of a miss I had with the new Grey CPS the 20 dollar one that JSM1 hooked me up with.
wish i knew....bought truck....changed out cps next day....at the time i didnt know there were 2 ...thought they just used different plactic.....i run dp chip at 80 tow and have 35s.....dynowed at 275 hp......if that helps.....david
We ran one for a few months back before we had a chip. When you hammered it, it would put out a slight gray haze. Even with a straight pipe it just seemed like something was holding it back. The blue one will turn it into more of a dog. I don't know what affect it had on the MPG. The thing that really made us ditch it for another black one was when winter came around. When it got cold & it was below freezing , it would go into the whole "Hi-Idle & Exhaust back pressure valve thing". But it would stay there for a long time without much affect. Installed the black one & worked like it's supposted to. Retarding you timing in subzero temps on a cold Diesel isn't the best idea.
Still have it for a spare, that's just what I think of them now. I'd only install one in an event that a black one failed.
Kinda wonder what would happen if you had one & put a DP Tuner on Lope Idle...?
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