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Message: [QUOTE="Ipkyss, post: 745587, member: 1737"] Well I am pulling hills from MA- PA that are long and steep. Enough to put the big rigs down to 30-35mph. My truck and 36ft enclosed gooseneck on the last trip was 23,800lbs gcw. So a little over 15k in tow. Some hills I am at 40-42 psi boost for minutes at a time. Which will hold me right at 70 mph in overdrive. I believe a few of the longer hills are a 5-6% grade. Most I ever see temp wise is if I fall below 70 mph, right before it downshifts it will hit 1100 degrees. But normally a max off 1000 on a hot day. The intercooler dropped my towing egt 150-175 degrees. This is also towing on the Spartan 250 tune. I limit my foot to about 42-43 psi boost in any gear. I consider that my safe limit for power. Running the bigger tune and limiting the boost give me enough lower rpm torque that the truck almost never downshifts. I use to tow with the spartan 275 before the 71mm [/QUOTE]

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