CAT

I've never ran an acert personally but I read everything I can about them.

I think they are pretty good. Should easy go close to a million miles on a rebuild. IVAs can be problematic but easy enough to fix. Some don't like the compound turbos but I think they are great, I run a set on my non acert.

Overall no emissions crap and good life expectancy.

Has it had a rebuild with paperwork?

 

Very good engine. Get 50+ Pounds of boost on the one I drive.
Rocker arms/ jake bolts,
friction plate gaskets leaking are common problems.
Ard head or Iva whatever it is another

 

They do have "emissions crap" that's the ACCERT part of it. I had an NXS in a Pete. I was told the "N" was the best one, issues with the VVA'S were delt with by then. I had no issues with them. It was a stinky engine, lots of fumes from the stink pipe at idle, enough that at a stop light I'd switch the HVAC to recirc so it didnt get in the cab... it did go thru a bit of oil constantly, and I had a dyno and blow by test done before I bought it at CAT, it came back saying it was very low, so not sure why the fumes?
CAT parts are 75% more then Detroit and 50%more than Cummins, and it was THIRSTY as far as fuel. It pulled great, lots of low grunt, no need to rev it like a detroit. Other than that it it was a great engine. Worst part was the fuel consumption. That truck never got into the 7's even hauling an mty wagon. If I was heavy it was mid 5's. Comparing it to my Detroit's I'd say they are 1.5 to 2 mpg better.

 

Don’t expect much for fuel out of a factory tuned acrt, a good tune will set them straight though, some guys like to slap a single turbo on but you need to drop compression and such and you are still just trying to solve a problem that really isn’t,

stay away from the SDPs

 

Thankfully the ARD head is only on the SDP. The only Cat I'd avoid, the PEEC being a distant #2.

 

Mxs are good motors. I wouldn’t let that be a deal breaker

 

Why does everyone say if you single it you need to drop the compression? Air is air. Coming from compound or single turbos what is the difference? I didn't raise my compression when I put compounds on my 6nz.

Am I missing something

 

I follow you. Only reason I can think of is if they run a hot tune and cram more boost in.

 

Benefits of a Single Turbo Conversion

Still don’t really understand why everyone goes to a single turbo.
Maybe if one breaks