Quote:
Originally Posted by rebelsbeach
Frank says it best.... Had to go and find this.... Words to live by.
"Its doable and shouldn't be a deal breaker as I also got almost 10 mph at 68 in the hills. Big upside for a very small downside as far as I am concerned"
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Thank you for the kind words. I have been accused of the opposite
Here's the update. Darin told me originally that the tune they could put in it would ultimately be decided when the ecu was finally hooked up to their computer. Well.... When they hooked it up and Josh fiddled with it for about 1/2 hour trying to find the 400/1250 uprate.... No such luck. He shows me that it only allows the 350/1150 tune. He believes its because its the brand new for this year L9 and not the ISL from last year. Seems Cummins is being very conservative at this point in time. I'm hugely disappointed but after they discount it down to 2000.00 with the 5 year warranty intact and a few calculations on my calculator as to what I should expect I tell them to go ahead with it.
Finished up and took the same route as yesterday. My calculations were spot on. I calculated it took 980 lb/ft of torque to maintain speed up the grade. That was 1500 RPM and 54 mph.. That same 980 is now made at approximately 1700 rpm and it worked out to 59 mph and that's exactly what it did. I was calculating a 9 mph increase with the 400/1250 tune but I gotta say I am pleased with the 5 I got. The 1700.00 savings made it much easier to take also.
Bottom line. It was worth it even if I didn't get quite what I hoped for. All I really wanted was for it to climb a 6% grade at 50 or better leaving it in drive. I truly believe it will do that easily now as before it would do no more that 47 in drive and 51 manually shifting it. I think I will get 55 or 6 in drive now in 5th gear instead of 47 in 4th..
Anybody interested in doing theirs on the West Coast I will give you my guys contact info. He is the direct sales rep for all 37 of their stores but is based in Yakima. He can hook you up at YOUR closest facility or you can bring it to Yakima. The guys here are stellar. One of the only Cummins stores on the West Coast with 3 master techs. Most have one or two.
I will provide you with his name and cell # in a private message as I don't believe I am allowed to post it in a post.