Does everyone else run the added timing or should I be running the programming without timing?

 

You had BETTER be concerned if your pistons will take it, forget the turbo. Its gonna toss one soon at those temps.


Be CAREFUL with advanced timing and lots of fuel on the +04.5 trucks, the 3rd event and piston design causes some issues when you push the envelope.

Its not all about EGT's when you throw timing in the equation. It quite possible to melt a piston at under 1300 degrees with the right conditions. You have to be aware of the cylinder pressures and temp create by the timing and duration of the tune or it will not be a good day.

 

I guess I forgot to mention I'm not trying to run what everyone else is running, but is the added timing safe considering my mild mods?

 

the trans temp should run 40 degress lower than your coolant temp

 

Depends on where you measure it at. Measured in the pan 20-30 degrees less, in the cooler return line 30-40 degrees less, in the hot line with the TC locked 10 degrees less, unlocked TC anywhere from 180-220. There is no hard figure for how much the temp should vary from coolant.

The only range that makes sense is 140-230 degrees because of the variations in use.

 

If your pryo prob is in front of the turbo (mounted in your manifold not in the downpipe behind the turbo and if it is mounted in the down pipe your gauge will read anywhere from 200-300 degrees cooler than what your actual temperature is) then once you reach 1600 F and beyond on your gauge then you are causing engine damage and thus engine damage = $$$$ i hope this info helps!!

 

Everything I have seen for cummins motors says 1250 and below is ok, anything above that might be playing with fire (so to speak)
Scott

 

I was always told 1250 was the limit and to back out at 1100 just to be safe. I say why take a change running higher numbers being you never know if your gauge is 100% accurate at any given time, leave some room for gauge error.

 

The 1250 number is a safe range all the way back to the 12V's, You can run the 12V's up to 1500 for several minutes at a time without issues.

The CR engines run a lot hotter for emissions reasons and have the parts to handle it. Better valves, valve seats, exhaust manifolds, better piston cooling handle higher temps easily. The 600 series motors were tested by Cummins stock at 1400-1500 degrees and Cummins says it is fine, the earlier engines will run 1300-1400.

 

Is this before the turbo (between #5 & #6 cyl in the exhaust manifold - between the head and the turbo) or after the turbo (in the downpipe - between the turbo and exhaust). Just trying to clear up the details for everybody who is just getting into these... Like me!