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Mackvette1

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About Mackvette1

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    Gear Jammer

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  1. Well after a few days of testing and diagnostics, I found a hole in my air line going to my boost gauge..fixed it and now I get 30lbs of boost under full load most of the time. Did not find any other leaks after pressurizing the intake system so I left the fresh air compressor pipe/hose alone for now. Truck still feels sluggish at times so I turned to the fuel system. Replaced all fuel lines, filters, and replaced check valve. While taking the line from the tank to filter housing off I found a chunk of plastic/rubber from the inside of the fuel line stuck in the elbow. Found my problem I’
  2. Just did the intercooler. I can do that tonight, that should also tell me if my pipe for air intake on air compressor is good or not also ...how much pressure? 30lbs like the book says for the intercooler test?
  3. Pressure check intercooler and found no leaks and it passed the leak down specs...so onto the air compressor intake pipe...plan to just use 3/4 inch hose to test it for a day and see what happens
  4. Also note that when air compressor is pumping I lose 1 to 2 lbs of boost
  5. Ya might be an option once I get the boost issue figured out...I did not pressure check it yet, also has 2 price manifold
  6. Yesterday it seemed as air temps got warmer in the afternoon i was consistently lower on boost and ultimately power than in the morning....now this mornings ride to work the truck seems to be “normal” but still maximum of 24 lbs...just for the hell of it I took the check valve off on the return fuel side and inspected cleaned and put back in(didn’t find anything in there)...leaning towards changing the intercooler first before changing the cam gear since I was lower on boost before I didn’t the hp increase...t thanks for input!
  7. Thanks everyone...So what is the process of changing the cam key?
  8. Mack dealer put the request in to mack headquarters and never mentioned cam key...ran the truck all weekend here and temp didn’t move off of 180 all day...what does changing the key way do ? Change the timing I assume? What will it hurt if not changed? Also my problem with low boost was there before I upgraded the horsepower. Also truck is a 2000 amd I read somewhere you didn’t need to mess with key way in that year of truck but I don’t know for sure
  9. Hello was wondering if I could pick your brain...recently took this truck from 350 to 427 using correct part numbers on the injectors and turbo , set the valves while is was there and had mack dealer reprogram Ecm. Truck has only 320000 actual miles on it...before it would only make 19 to 21 lbs of boost regularly. Now it only makes 20 to 22 lbs regularly. Truck runs ok but not a power house.. I feel like there is more power there by changing intercooler maybe? Or maybe cleaning a check valve ? Also last 6 of the vin 125886 maybe there’s a data file upgrade? thanks
  10. Hello was wondering if I could pick your brain...recently took this truck from 350 to 427 using correct part numbers on the injectors and turbo , set the valves while is was there and had mack dealer reprogram Ecm. Truck has only 320000 actual miles on it...before it would only make 19 to 21 lbs of boost regularly. Now it only makes 20 to 22 lbs regularly. Truck runs ok but not a power house.. I feel like there is more power there by changing intercooler maybe? Or maybe cleaning a check valve ? Also last 6 of the vin 125886 maybe there’s a data file upgrade? thanks
  11. Ok folks I started with 2006 granite with ami 370hp 13 sp fuller and 4.17 mack rears that I called the "boat anchor" when I first bought it. Hauling road construction materials, heavy equipment, and grain so loads vary from 70,000 to 85000 lbs. sluggish, no low end tourque, terrible fuel millage, and just tough to drive in the hills was a far cry from my old ch with a 400 or even my old r models with 350. So I went to work on here and learned how to make these trucks run. My first step was to take my 370 to 427, which I did in by having my local injector shop resize the injectors and then
  12. Looking for the best solution for my truck. 06 granite with ami 370 hp 13 sp trans with 4.17 Mack rears with 22.5 tires. Looking for the best hp setting and to pick up the mileage a bit..have injectors on the bench and thinking about making them to 427. Or should I keep it a 370 since them are close to the same in hp and torque? FYI my old ch with a 350 in it would eat this granite for breakfast!! Any input would be awesome!!
  13. Looking for the best solution for my truck. 06 granite with ami 370 hp 13 sp trans with 4.17 Mack rears with 22.5 tires. Looking for the best hp setting and to pick up the mileage a bit..have injectors on the bench and thinking about making them to 427. Or should I keep it a 370 since them are close to the same in hp and torque? FYI my old ch with a 350 in it would eat this granite for breakfast!! Any input would be awesome!!
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