try not to ask the same ****...over and over...haven't seen any1 bring this up... A couple of my buddies local were telling me about the AirDog II Fuel Air Separation System ...they say it makes a world of difference in these trucks.. Wanted to hear from some on here...with any personal experience with it?? IS it worth the extra money?

 

It helps maintain rail pressure when you run bigger HP tunes. Biggest benefit is better filtration.

 

hey thanks uga33...I was starting to wonder man...use 2 you get a lot of input on this site.. now it's mainly people asking the same stuff over and over.. but yeah had a couple buddies mention it.. so I figured id check around.. im just running the canned hs 250hp right now.. but always looking for improvements!

 

I think they are worth the money on filtration alone. These fuel systems are picky about contaminants.

 

i agree... worries me 2 death...I use the diesel kleen every fill up.. don't know if it helps or not but it makes me feel better.. only fill up at our hess stores...there always re-filling the tanks..had good luck so far!

 

I ran an AD-150 on my 6.4. My buddy fabbed me up a piece so I could delete the stock HFCM. I would get the AD-165 and run a Caterpillar filter on it. They are made to replace the factory pump.

 

You better believe your buddies! I was having issues with stock pump om a 99 cummins. I asked a friend who has a 99 PSD about it, and he told me about Air Dog systems. He had one on his 99 and took me for a ride. Afterwards, we had a yakk session about it, and I was convinced! More HP, better throttle response, a bit better mpg, and no more mechanical issues. It was Easy to install on my dodge, and he told me the same for his PSD. I am a mechanic of 40+ years, and am not easily convinced about aftermarket stuff. My advice? Do your research.... Then get one. I would have spent $300 on the stock mechanical pump and filter. The Air Dog came with two filters, one for fuel, one water separator. I loved it.... It was a bit pricey at just under $600, but I felt worth it in the long run. Also, the folks at AirDog were very good to deal with and the warranty is good.

 

yeah kowdog that's what I was told ...better throttle response..a little better mpg's..more hp... im getting between 12-14 with these 37's...thought about maybe going to 35's.. thanks for the input.. uga33 just out of curiosity why did you switch 2 the 6.7?? I've had a few guys say they miss their 6.4... have you been happy with the 6.7??

 

Only thing I miss about my 6.4 was the easy 585hp it made. It was fun, but the fuel mileage was average. I hated the way it towed. Felt gutless unless you were towing with big tunes. Doing that, you then worry about cracking pistons towing with big tunes, etc. Fuel mileage towing was always single digits. I really was impressed with where the 6.7 makes its power versus the 6.4. Fuel mileage is better unloaded and loaded. I don't plan on turning this truck up because it has a lot of limits. The 6.4 didn't and I couldn't risk getting bitten by the mod bug any harder. My 6.7 stays on the lowest HP tune Spartan has. All I need.

 

no doubt man...im right at 600hp/1000lbs torque.. I bought the truck I said I'll leave it stock...didn't last long 6' suspension 37's/20's sct/flopro exhaust 1st then hs mini maxx 250hp tune then afe intake.. now im looking at the airdog..it's so hard not to keep going.. but believe it or not I'm 28 ...but I drive like an old man.. get on it here and there but not to much... but I know whatch mean about the bug!

 

I would definitely get an Airdog or Fass. It will be my last mod on this 6.7 I currently drive.

 

UGA33, what Cat filter do you run on the AirDog unit. Have had the FASS unit on my Peterbilt (Caterpillar engine) for 5 years and would replace immediately if it went out. Had the engine rebuilt last year with 300,000 miles on the injectors and they said they looked new. No wear on the tips or needles. Looking to put a unit on my 6.4 psd now that warranty is up.

 

This is what I ran in my 6.4.