Mackdaddy2030 Posted April 13, 2014 Share Posted April 13, 2014 What major problems are there with the new MP8 motors with DEF?Any ideas of what the best HP would be for good pulling power on hills and good fuel mileage?Gonna get the Allison auto and half the year pulling a shorty dump at 73,280 and the other half pulling a tank or a long dump at 80,000. Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/ Share on other sites More sharing options...
Kyle 537 Posted April 14, 2014 Share Posted April 14, 2014 I'm a tech for a oil field fleet, of water haulers. We have about 10 mo8 engines and they have all been great. One set of cups went bad on a 2011 (that truck was rolled has been problems ever seance) other then that the MPs have been awesome. sensor failed here and there and a couple def pumps. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-241895 Share on other sites More sharing options...
MackMann85 Posted April 14, 2014 Share Posted April 14, 2014 They do as well or better than what else is out there. For mixed on-off road, a 415C or 445C should do well. You wont get maximum mileage with an Allison, but thats your call based on the trade offs with the job you do daily. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-241908 Share on other sites More sharing options...
Popular Post Under Dog Posted April 14, 2014 Popular Post Share Posted April 14, 2014 I run a 2010 with mp8 and 13spd auto shift. Pull 48' skate board spread axle. Ive been out 5 1/2 months on this trip along. Mostly heavy steel loads. Always right at 80k gross. Run east to west coast. Least miles a week ive done this trip is 2,854/wk. I pull hills, desert, flat lands, snow, ice, you name it. I run the snot out of this mack! I get 6.7 - 8.1 mpg no problem. My family has always run macks. Telling ya am sold on this mp8. Shes pushing 500k miles dont use drop of oil. Or any fluids. Runs like a watch. Very pleased. This girl has big thighs and pulls good. It set at 450hp. On hills with heavy load 75+k gross. Drop to tenth and maintain 60mph up hill.keep rpms around 1525 - 1575. And the best part...when I do need maintance or parts every! Mack shop treats me right at the right price. Never had that any where else. Best luck to ya. Safe trips. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-241925 Share on other sites More sharing options...
brutus998 Posted April 14, 2014 Share Posted April 14, 2014 We have a few and so far so good. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-241956 Share on other sites More sharing options...
Mackdaddy2030 Posted April 15, 2014 Author Share Posted April 15, 2014 Under Dog, what was your motor originally set at and how did you set it to 450? I was thinking about the 445 cause I don't think you can get the Allison with the 505. I know some guys that have the Allison and love them. I do a lot of stop and go in traffic for half the year and think the Allison would be great. The auto shift doesn't work good for the construction stuff I do. That's why they don't offer the M Drive in the Granite. Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-242008 Share on other sites More sharing options...
mackmechanic15 Posted April 19, 2014 Share Posted April 19, 2014 Nothing inherit that are problems. Some things here and there and truely overal are good. The cups problems have been fixed for the most part with the brand new ones. There have been a couple updates even after the stainless cups came out si if ut has the latest dobe it should br good. Trust me keep it at dealer and it will save u time and money no offense to anyone but chasing codes without the proper info leads to problems. Seen lots of money or parts thrown at stuff when it just needs programmed. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-242682 Share on other sites More sharing options...
mackmechanic15 Posted April 19, 2014 Share Posted April 19, 2014 Nothing inherit that are problems. Some things here and there and truely overal are good. The cups problems have been fixed for the most part with the brand new ones. There have been a couple updates even after the stainless cups came out si if ut has the latest dobe it should br good. Trust me keep it at dealer and it will save u time and money no offense to anyone but chasing codes without the proper info leads to problems. Seen lots of money or parts thrown at stuff when it just needs programmed. Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-242683 Share on other sites More sharing options...
mackmechanic15 Posted April 19, 2014 Share Posted April 19, 2014 Nothing inherit that are problems. Some things here and there and truely overal are good. The cups problems have been fixed for the most part with the brand new ones. There have been a couple updates even after the stainless cups came out si if ut has the latest dobe it should br good. Trust me keep it at dealer and it will save u time and money no offense to anyone but chasing codes without the proper info leads to problems. Seen lots of money or parts thrown at stuff when it just needs programmed. Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-242686 Share on other sites More sharing options...
Under Dog Posted May 3, 2014 Share Posted May 3, 2014 Under Dog, what was your motor originally set at and how did you set it to 450? I was thinking about the 445 cause I don't think you can get the Allison with the 505. I know some guys that have the Allison and love them. I do a lot of stop and go in traffic for half the year and think the Allison would be great. The auto shift doesn't work good for the construction stuff I do. That's why they don't offer the M Drive in the Granite. Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-244121 Share on other sites More sharing options...
Under Dog Posted May 3, 2014 Share Posted May 3, 2014 Sorry about not getting back sooner. Had couple hot loads then finally some home time. I dont have the allison. The trans is the m drive. A 13 speed with clutch all electronic over air controlled. Yes it was a 550hp was just to much power. Took in to shop in Flagstaff has a wiz mack man there. He use to do double and triple frame conversions. He played with it for two weeks. Unreal how it runs. He told me if you live in an area you can get away removing all the emissions crap and retune the engine he says it will turn into a beast and hold together. Ive run alot of different trks over the years for people. These new macks are holding together and making money. What more can a person ask for? Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-244123 Share on other sites More sharing options...
Fishhook Posted May 10, 2014 Share Posted May 10, 2014 Is there anyone that does deletes? Or get a hold of the military/non US version ecm? Seems like those that do the tuning only do CAT or Cummins and occasionally Paccar. Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-244885 Share on other sites More sharing options...
j_martell Posted May 10, 2014 Share Posted May 10, 2014 There are shops (in Canada at least) that do deletes, but buyer beware....... Quote Lack of planning on your part does not constitute an emergency on my part.... Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-244931 Share on other sites More sharing options...
Trey Posted March 30, 2020 Share Posted March 30, 2020 I have a 2009 Mack Pinnacle with the Mack MP8 Engine. Is this a reliable truck Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-447201 Share on other sites More sharing options...
Bullheaded Posted April 2, 2020 Share Posted April 2, 2020 On 5/10/2014 at 7:23 PM, j_martell said: There are shops (in Canada at least) that do deletes, but buyer beware....... You got that right. I have a LOT of friends that got their deletes and programs from that biggest, most famous delete outfit that does all the advertising. And they ALL blew up. Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-447531 Share on other sites More sharing options...
mp8_macky Posted May 3, 2020 Share Posted May 3, 2020 these motors are great once they are deleted. their biggest issues is the emission system which almost led my company to bankruptcy. it was terrible. one day it is the doser, the other day it is the sensor... when i did the delete i started breathing again, i can't thank the guy enough. be aware there are plenty of them claiming they can do them, but not a lot of can do them right. the only once that i know who do them right, are the same guys that did my entire fleet. i run these deletes for years now, and never had a single issue. i personally vouch for them. it is https://truckecmtunes.com/ Quote Link to comment https://www.bigmacktrucks.com/topic/35393-how-are-the-mp8-motors/#findComment-450250 Share on other sites More sharing options...
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