Attention: TDR Forum Junkies 
Got one of the Cummins 245/505 ECMs for the ETC. UPS dropped it off last night,so I installed it on my lunch break. I was really hoping to get that smooth and quiet idle like the ETH trucks have,but I only got the somewhat smooth part.
The first drive "around the block" wasn't impressive,but the more miles I put on during my drive home,the more I started to like it.
With the DD stage 2 injectors,my truck maxes at 34psi of boost. With the new ECM installed,it now maxes at 35psi. Max EGT's are unchanged. It also seems like the truck smokes just a tad bit more during normal acceleration.
At first I wasn't impressed with a hard acceleration. It took a few times to notice,but there is no longer the power spike when you hit 2000rpm. Revving the engine hard through the gears all the way up to 3000rpm is absolutely smooth with no spikes. The real impressive part was testing the torque up a couple of 12% hills near home. With the stock ECM,if I had a running 1800rpm start in 5th gear (6spd),it would lug half way up the hill and I would have to downshift to 4th. The torque band is suprisingly lower on the Torqus. I held the throttle at 1600rpm in 5th gear all the way up,and the truck never bogged going up the same hills.
Another thing that was interesting was the Jacobs brake operation. The stock ECM has a 1. 5 second delay,then the brake engages. The Torqus only has a 1 second delay. I like that much better.
So far I only have 25 miles on it and the verdict is still out. But I'm liking the lower torque band and ebrake function,and hoping to see if the timing in the Torqus gives any better mileage.
-Mike
The first drive "around the block" wasn't impressive,but the more miles I put on during my drive home,the more I started to like it.
With the DD stage 2 injectors,my truck maxes at 34psi of boost. With the new ECM installed,it now maxes at 35psi. Max EGT's are unchanged. It also seems like the truck smokes just a tad bit more during normal acceleration.
At first I wasn't impressed with a hard acceleration. It took a few times to notice,but there is no longer the power spike when you hit 2000rpm. Revving the engine hard through the gears all the way up to 3000rpm is absolutely smooth with no spikes. The real impressive part was testing the torque up a couple of 12% hills near home. With the stock ECM,if I had a running 1800rpm start in 5th gear (6spd),it would lug half way up the hill and I would have to downshift to 4th. The torque band is suprisingly lower on the Torqus. I held the throttle at 1600rpm in 5th gear all the way up,and the truck never bogged going up the same hills.
Another thing that was interesting was the Jacobs brake operation. The stock ECM has a 1. 5 second delay,then the brake engages. The Torqus only has a 1 second delay. I like that much better.
So far I only have 25 miles on it and the verdict is still out. But I'm liking the lower torque band and ebrake function,and hoping to see if the timing in the Torqus gives any better mileage.
-Mike
