Semi-Tractor "Tractor" pulls

One of the most reliable rotating assemblies for cats come from the C15 acert, the monotherm piston can really take a lot of abuse compared to older 2 piece with an aluminum skirt or all aluminum piston.

 

Seems like 40 pin ECM can handle higher RPM better than 70 pin in local pulls I have watched, but it has been a few years since been to a pull so this has probably been figured out. 70 pins seem to misfire/pop in the high RPM, but still pull like hell! Talking about the Red and white Pete's from Michigan vs Black and Red Freightliner cabovers from Northern Ohio. Sure you have seen them @SmokinCAT.

 

70 pins actually have more fueling capability, but it takes a good file to keep them from doing that against the upper rpm limit.

 

My 350 CAT, the little one I was issued by Anderson Trucking was explained to me has having Ceramic Cylinder Liners.

Does this make sense or is someone blowing smoke on my ego at that time?

 

Blowin smoke. More coffee counter lunch BS. And by some your posts I think you spend a little too much time at that counter.

No offence.

 

What Swaan said, cat uses nothing of the sorts in their engines, the acert pistons have what is called a grafal coating on them, this is a mahle product.

There is a company in Columbus Ohio that is making fully ceramic pistons for the 3406B, but I don’t know what ever became of it.

 

Thank you kindly. Now I learned something.

I appreciate you taking the time. I have always wondered what the secret was with those wonderful cats.

 

Years ago I was roll off container truck shopping in Indy and Paris OH. During the drive in between the salesman said there was a guy in that area guarantying 750HP everyday from a big cam. Drive in, inframe, ceramic pistons, turbo, fuel injectors and drive out at the end of the second day. Never heard of or saw them before except in an experimental hydrogen engine.

 

That was likely the fabled ever so popular snake oil coating that Pittsburg power pushes.

Hate to tell anyone that bought into it but it doesn’t work as a coating, it’s applied when pistons are cool at least relative to temps seen in combustion chambers so as soon as crown heats up and expands the coating cracks and essentially goes out the exhaust.