Cat Acert Pyro Temps?

I don't know about the modern engines. On the old Iron we can do 1250 by stopwatch no more than 5 minutes when fighting a serious mountain. We like it better at about 1000. We know we can pull all day on 1000 sometimes we would drop a gear and ease up to get it down to 900.

Once in a while in a very bad spot on some of those coal roads Ive taken her to 1400 max. And that's strictly for very short time followed by a nice lunch for me and a nice rest down to 500 or whatever it settles at idle along with a visual inspection of every bolt, gasket and turbo etc along that exhaust side of the entire engine block.

I would roll a few sheets of paper and run it along there and if it's leaking it will ruffle the paper and maybe burn it a little as a early warning, shop time now please.

The pyro aint the all in be all. I keep an eye on engine oil pressure engine oil temp and coolant temp along with the trans temp and both drive axles if need be. Usually the engine oil pressure drops 10 pounds when hot as a early warning followed by a rise in engine oil temp followed by a rise in the coolant temp. You best be looking for a place to cool her down before then. The transmision and drives, those are not as critical provided you stay I think 230 or less at all times. IF the coolant started getting hot and you had some of it cooling the transmission on it's attached cooler, that is the third item to start increasing in temp.

 

Regular cat online users can no longer access the TMI information, really upsets me.

 

As the guy said above the compounds can loose upwards of 3-400* from pre to post turbo. At 950* on hard pull you are likely closer to 1350* in the manifold.

 

When your cac cracked were you still building your normal boost? I have a program in mine and build between 50 to 53 pounds of boost. Found few small leaks on boots but all of a sudden my 2006 mxs wants to run 725 750 all day. Mostly flat running in Iowa some hills. 18 spd 336 rears flat top pulling a rack. Soon as I hit 18 and get going 70 mph about 1450 rpms she wants to run between 825 and 950. I’m at a lose and ain’t having luck figuring this out

 

wtf? Am i missing something here? turned on fan putting more drag on motor lowered egt's?

 

i guess its all depending on something. I had extremely low egt's during long pulls with heavy hauls last year. I said something cant be right. Brought truck home and pressure tested. Found both cac elbows cracked and major holes in the fin areas. MAJOR. but didnt really lose more than 2 psi at full boost. Slapped on new cac. and exhaust temps rose back to normal. Around 900-1000 on hard heavy long pulls. So in my case for whatever reason boost leaks lowere my egts by 300 degrees. Dont ask me, it is what it is

 

You are putting more load on engine with fan on and stealing 50 HP (around) which can be used to climb , gear down or back off acceleration correct me if I m wrong please