2006 Kenworth T600 C-15 ACERT. TONS of questions!7

Switching to single turbo? Sure, if he doesn't mind losing that quicker HP/torque gain from the narrow channels on the dual. Also less maintenance breakdown issues on single screw, and toss in an aging c-15 with dual screws? ehmm...I'd just as soon avoid any cat engine until they get their business straight with the new CT series and completely write off the c15. But it doesn't sound like he has a choice so I would opt for the single.

Sent you a PM.

 

Keep the single, if he does anything a PDI tune would be good. The Accert engine is actually a much better set up than the older 6NZ that everyone loves to rave about. I'd just leave it alone. CAT does not manufacture a road engine right now. International does, they are the maxxforce painted yellow, YUCK! I'm not to sure about the cooling, but it seems like those are normal temps.

 

If keeping the temps down is the main goal I would leave it alone. The temps you mention are normal and the C15 was designed to run in that range, so running it cooler than intended may bring other problems. If I had turbo problems I would switch to a single, if the two are just fine right now then you would be wasting money with no benefit. I agree, the C15 gets a bad rap from the old school it doesn't deserve.

 

Cat does manufacture class 8 engines again, and their own brand of trucks. They've just branched into regional class 8's and the engine is the CT13 series.


International no longer produces any maxxforce products, and hasn't for a while, especially since it fell under a class action lawsuit and in the same boat as Cat with it's c15. Though international does still manufacture their duramax engines with the SCR/carb compliance, there's a whole world of difference between an engine expected to pull 40k and one designed to pull 80k and they both have to be close to the same dimensions. It's not quite clear how similar the c15 and maxxforce were to one another since all class 8 engine share many industry standard designs.

Another quick point is that Cat and INT have partnered and that is clear enough in body design + frame building plus their open countenance towards one another.

So long as the fan is kicking over at 240/250 everything is cool in the neighborhood, but a single screw would do a better job of preserving that engine.

 

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the fan is supposed to cut in at 217. leave the twins alone. seems as if he doesn't have any problems.

 

You can bump the horsepower to 550 and your current 1650 rated transmission will be fine - just don't be dumping the clutch and popping wheelies. Dealer type places KW, Pete, or CAT will not do that sort of uprate - you'll have to find a private individual who will.

 

Maxxforce 15 -- Cat (stopped production in 2013?)
Maxxforce 13 -- Man (stopped production in 2014)
International N13 -- Man w/ Cummins SCR (2015+)