04-13-2020, 02:17 AM
Hi Guys
I remember coming across rawze milk money write up for cm870 back in 2013 ish I did trial runs on a few engines for the owner of the transport company i was working for at the time in western Australia with road trains operating @ 173 ton
The DPF & EGR CM871 engines saw the biggest gains using 150-200 litres less on the same run. (200 being dpf engines with issues) these trucks in a western star tri drive went from 800-850 - 650-680 liters per trip
EGR only CM871 engines with a delete seen improvement from 700-750 to 600-650 in twin drive and 650-680 in tri drive all mack titans twin drive included.
Another point of interest found when doing this was that cummins calibrations destined for the mexican market where far more fuel efficient than what was destined for Australia.
Before doing this experiment i collected all the fuel data from all the trucks and found out the owner had paid chumpys diesel in perth to tune one truck so i looked through the data and found that two trucks where using less fuel than the rest. (after i got access to calterm this engine was found to be advanced 6deg and the turbo map had been modified. the injector orings where burnt out after 300ohrs and it began running on, after i replaced o-rings and started it it also knocked a fair bit while cold which is when i changed it to the early rawze delete.)
The one that had tuning done to it was still on average using 50-60 litres more than the one that had the incorrect calibration loaded into it by the dealer upon commissioning the engine which had the mexican cal in it.
the mexican cal was only using 20-30 litres more than the deletes i done later down the line as i left it be seeing as fuel savings was what we were chasing.
If the drivers didnt take care to ensure EGTs didnt get too high from lugging the engine down in RPM while hill climbing we did see turbo and cylinder head failures from the resultant heat that would build up.
Thats just my experience, but after reading through everyone else's comments and reading that milk money has been updated, does anyone have links to the updated material? I would quite like to check out the updated version.
Does it include CM2250 BDG now? as my father owns a few of them and one of them is giving some SCR related trouble that i could do with a read up on.
I remember coming across rawze milk money write up for cm870 back in 2013 ish I did trial runs on a few engines for the owner of the transport company i was working for at the time in western Australia with road trains operating @ 173 ton
The DPF & EGR CM871 engines saw the biggest gains using 150-200 litres less on the same run. (200 being dpf engines with issues) these trucks in a western star tri drive went from 800-850 - 650-680 liters per trip
EGR only CM871 engines with a delete seen improvement from 700-750 to 600-650 in twin drive and 650-680 in tri drive all mack titans twin drive included.
Another point of interest found when doing this was that cummins calibrations destined for the mexican market where far more fuel efficient than what was destined for Australia.
Before doing this experiment i collected all the fuel data from all the trucks and found out the owner had paid chumpys diesel in perth to tune one truck so i looked through the data and found that two trucks where using less fuel than the rest. (after i got access to calterm this engine was found to be advanced 6deg and the turbo map had been modified. the injector orings where burnt out after 300ohrs and it began running on, after i replaced o-rings and started it it also knocked a fair bit while cold which is when i changed it to the early rawze delete.)
The one that had tuning done to it was still on average using 50-60 litres more than the one that had the incorrect calibration loaded into it by the dealer upon commissioning the engine which had the mexican cal in it.
the mexican cal was only using 20-30 litres more than the deletes i done later down the line as i left it be seeing as fuel savings was what we were chasing.
If the drivers didnt take care to ensure EGTs didnt get too high from lugging the engine down in RPM while hill climbing we did see turbo and cylinder head failures from the resultant heat that would build up.
Thats just my experience, but after reading through everyone else's comments and reading that milk money has been updated, does anyone have links to the updated material? I would quite like to check out the updated version.
Does it include CM2250 BDG now? as my father owns a few of them and one of them is giving some SCR related trouble that i could do with a read up on.
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