I understand that the 210 Tow Performance has built-in safeties for towing, but my experience has been that while the 250 may run a little more Fuel Rail Pressure, it doesn't require as much Turbo Boost to get the job done. Everthing else is virtually "equal" except that the 250 gets much better fuel mileage.
I've been towing my 8,000# fifth wheel with the Spartan
210TP and 250 on some flat-lands and in the mountains. Here is some of my data:
Outside temperatures from 100 to 105 degrees
210TP mileage = 8 mpg
250 = 11.5 mpg
210 oil temp = 212 degrees
250 = 210 degrees
210 max. boost = 33 psi
250 max. boost = 29 psi
210 fuel rail pressure = 12,000 max.
250 fuel rail pressuer = 13,500 max.
Transmission & coolant temperatures virtually the same.
Do these numbers look good?
If so, what are the built-in safeties for the Tow Tunes?