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Message: [QUOTE="Wrecker, post: 1519220, member: 12157"] Hooked up to the toy hauler this afternoon and pulled 70mi across some good hills at 80mph to work everything pretty hard and get some temp data and verify it with a temp gun. 17k lbs 43' Toyhauler Tyrant tow tune Pulling 80mph 85 deg outside temp 4500' elevation at the lowest, not sure what i got up to on all the hills Cruising on flat ground here's my numbers, 2000rpm, 6th gear 1000deg egt 20psi boost 113 IAT 203 CACT 125 Fuel rail temp Pulling good size grades 70-75mph, 5th gear 1350-1400deg egt, adjusted throttle to keep it under 1400 30psi boost 150-190 IAT 215 CACT, this stays pegged at 215 and won't read any higher, hit's 215 with first acceleration and stays pegged a while after everything else is cooling after cresting the hills 127 fuel rail temp Half way through the trip pulled into a rest stop that was at the top a good size hill where temps were nice and hot. Took a couple min to get off and park and get the temp gun out to check stuff so everything was cooling off at idle for a couple min before these temps and dropping quickly as I was checking things. Compressor housing of turbo - 370deg hot side pipe couple inched past turbo boot - 330deg Cold side pipe right out of CAC - 240deg Intake pipeing at the Y - 220deg Air intake pipe - 210deg From these temps it makes perfect sense why the powder coat on the hot side pipe is discoloring and melting, it's only baked on at 400deg in the first place. If the compressor housing itself is 370 the air inside has got to be hitting well over 400 pulling hard. This time the factory boot off the turbo started melting slightly and squeezing out under the clamp on the hot pipe. Question now is it a CAC efficiency issue, turbo issue, completely normal? The diesel tech at my Ford dealer is leaning towards a CAC problem or restriction. Seems odd that a brand new NL intercooler would have that issue though. Funny thing is i never got a CEL this time with the usual P026a code, might have been because I let the truck idle for quite a while before I started driving while hooking up the toy hauler. [/QUOTE]