First tow after TSB 18-037-04......

[Sarge]

I finally got the fiver out of the driveway last weekend for a much anticipated tow after the TSB. I have been wanting to get her back on the Dyno and check the numbers to compare them with a dyno run back in April, but I can't get off work :{ So, when I hit the road I was expecting to have a noticible loss of power when pulling. This is because I felt a loss of "kick" at the low end right after the TSB. I naturally assumed it was going to kill my low end torque.



I pulled up the hill to Idlewyld, and a good long, twisty 6% to 8% grade. I was surprised to find that could not decern any difference in towing ability since the TSB. And this was on the heels of a 4500 mile trip to South Dakota in September. This was a surprise though, my EGT's were running about 150-200* cooler. I first assumed that DC just cut back on the fuel, but they must have played with the torque curve as well. I will be heading towards El Centro at New Years, and some grades I have pulled a hundred times, so I will get a better comparason. However, I did install a aFe stage one kit today. Now i'm wondering if I should pop for the torque tube... .....

 

[RKerner]

Dynoed mine today

At 10,100 miles, original air filter, blended fuel, new fuel filter, Valvoline Synpower fuel conditioner/cleaner;

269 hp @ 2950rpm

513 lbft torque @ 2640rpm (this doesn't seem right)

Are these in line #'s with other 600's? I searched and only found graphs on 03 HOs and one 268hp number in a B'Dog thread.

I am dropping it off tonite for a week to get the TSB and other minor warranty work done. Next dyno session is scheduled for the 11th.



I have a question; I can only get decent repeatable numbers in "tow/haul" mode after letting the TC lock up (1800rpm on up). If I try just letting the TC lock up w/o tow/haul on, it will downshift and hose things up. Dyno is a Dynotech inertial unit good to 1200hp or something.



Rick

 

[tschwab]

Sarge,



That is great news, really like the fact of the lower EGT's. Keep us posted.

 

[Sarge]

Rick, your numbers are about right. I Dyno'd when I had 2K on the clock and she was still very tight. It was a Mustang Dyno at the aFe factory here in So Cal. The numbers were 480ft # of torque, and 245 HP at about 2700 RPM. Remember, the numbers that DC and the other manufactures use for the bragging rights are taken at the flywheel. Our numbers are "real world" numbers taken at the rear wheels. Sarge

 

[RKerner]

Delay in Re-run

The service gal called up yesterday and said my truck won't be done until Monday. It seems I need two more injectors and they had to order the door seals. I'm kinda noticing a pattern on the injectors - unloaded highway mileage goes down with a bad one but towing or slow speed stuff is ok to only slightly lower. I got 14mpg towing 6K down to the dealer, with a bunch of it in 4WD. Maybe it will be way better on the way back... Oo.

 

[PJ]

Yesterday, I took a digital picture of the WHITE SMOKE that filled my front yard as my son drove out of the driveway. I took the picture up to the local dealer and was told it was cold weather condensation and it should get better once the weather gets warmer. Well, it was 61 degrees when we took the picture, along with the block heater being plugged in all night.

In another thread, I was told that I could have a possible leaking injector. If I do happen to have a bad injector, will it cause my truck to run rough or miss, or will it run normal and just smoke and get not so good mileage? I just don't want to come across as a PITA with the dealer. They admitted that they have no way to test the injectors at their dealer and the next closest place is about 40 miles south. I just don't want them tearing into my new truck if there really isnt anything wrong. Any comments?

Thanks

 

[RKerner]

Only 40 miles away?

I just don't want to come across as a PITA with the dealer. They admitted that they have no way to test the injectors at their dealer and the next closest place is about 40 miles south. I just don't want them tearing into my new truck if there really isnt anything wrong. Any comments?

Thanks

Take it to another dealer. White smoke is wrong, period. They have a clear set of procedures for identifying bad injectors, which you may certainly have. For a measly 40 miles, it would be worth the trip. Plan to leave your truck for a week as the process is diagnose bad injector(s), call STAR, play chinese fire drill with injectors (swap them into different holes), call STAR, get authorization for new injectors, order injectors from Cummins, wait, install, wait for dealer to call, pick up truck. See, easy.



I put the wife's van on a trailer, bring the whole works to the dealer 120 miles down the road, and drive the van home.



Rick

 

[RKerner]

had 18-007-04 done, 2 injectors, transmission flash

Had the 18-007-04 TSB done (along with #3 and #5 injectors), as I already had the fast idle enabled. Towing 6K down to dealer at about 60-61mph (bad weather) - 14. 0mpg. On the way back with the same 6K, 13. 47mph at 64-65mph. Kinda inconclusive on whether it did much. The overhead is much more optimistic. I'll hit the dyno this weekend for a power measurement, SOP dyno says it may feel more mushy. Saw lots of meteors from Perseid last night anyway.



SOP dyno is accurate:



Before numbers:

269 hp @ 2940rpm

513 lbft torque @ 2640rpm

After numbers:

276 hp @ 2950rpm

497 lbft torque @ 2940rpm (this didn't help, for sure)



Here's the graphs. I made several runs moving starting rpm up and down to mimic the first set of runs, but the bottom line is that hp goes up, torque goes down, and characteristic curves change shape. Intake air was 30 degrees lower than before also. It appears DC was just appeasing us to try to reduce the amount of negative feedback on 600 mileage. I'm going out west after Christmas, maybe the engine will break in some more.

B4 and after

 

[RKerner]

Dyno numbers b4 and after TSB

Had the 18-007-04 TSB done (along with #3 and #5 injectors), as I already had the fast idle enabled. Towing 6K down to dealer at about 60-61mph (bad weather) - 14. 0mpg. On the way back with the same 6K, 13. 47mph at 64-65mph. Kinda inconclusive on whether it did much. The overhead is much more optimistic. I'll hit the dyno this weekend for a power measurement, SOP dyno says it may feel more mushy. Saw lots of meteors from Perseid last night anyway.

SOP dyno is accurate:



Before numbers:

269 hp @ 2940rpm

513 lbft torque @ 2640rpm on blended fuel with Injector cleaner

After numbers:

276 hp @ 2950rpm

497 lbft torque @ 2940rpm (this didn't help, for sure) on mix of blended and #2



Here's the graphs. I made several runs moving starting rpm up and down to mimic the first set of runs, but the bottom line is that hp goes up, torque goes down, and characteristic curves change shape. Intake air was 30 degrees lower than before also. It appears DC was just appeasing us to try to reduce the amount of negative feedback on 600 mileage. I'm going out west after Christmas, maybe the engine will break in some more.

Dyno Graphs