Shadyacresmack Posted May 30 Share Posted May 30 I have a 2001 CH613 with an e-7 400 around 800k on engine thar doesnt smoke and doesnt have excessive blow by. I run AG commodities every day up and down hilly terrain in the northeast. im running 85-90k about 4-500 miles per day and I’d like more power dieseltuner out of Tennessee says he can reprogram my ECM to 525hp with no mechanical upgrades needed. is this realistic and has anyone here done that? thanks, Dan Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/ Share on other sites More sharing options...
0 Joey Mack Posted May 30 Share Posted May 30 That's a lot to ask for from less than 12 litres. So no turbo or bigger nozzles? And no drive line upgrades for the extra torque ?? Just curious. Ive never done H.P. upgrades that high. Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576666 Share on other sites More sharing options...
0 Shadyacresmack Posted May 31 Author Share Posted May 31 I’m not sure who to believe because the diesel shops say I need nozzles and injectors not programming and the tuner guy says just programming and no upgrades for that power level. Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576683 Share on other sites More sharing options...
0 Popular Post JoeH Posted May 31 Popular Post Share Posted May 31 Is anyone other than you driving the truck? If so don't do it. If it's just you, just go easy on the truck, and let us know. Watch your EGT's 1025 is max measured about 6" after the turbo. Joey is right though, this is only a 12 liter engine. 460 is the highest the factory tuned them. I know with the 11 liter E6 engines Mack tuned them right to the sweet spot of full power potential and still retain longevity. And those were 300-350hp. No reason to think Mack left their E7 engines with that much untapped power potential. 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576697 Share on other sites More sharing options...
0 Joey Mack Posted May 31 Share Posted May 31 I am rusty, but gonna toss this out there. I beleive that the 400 had a straight cam key, and the 427&460 had the offset cam key. It advances the cam 3 degrees. It will be a 2 day job, but if you are serious, this will add to a turbo, nozzles and ECM program.. like JoeH said... If your the only driver, then you will take care to not tear it up... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576720 Share on other sites More sharing options...
0 Shadyacresmack Posted May 31 Author Share Posted May 31 I am the only driver yes and I definitely don’t want to tear it up. It is doing the job currently but just very slowly on hills. Would I feel a noticeable difference in pulling power in reality if I had it tuned to 454hp like the 460 factory setting? Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576721 Share on other sites More sharing options...
0 Mark T Posted May 31 Share Posted May 31 12 minutes ago, Shadyacresmack said: I am the only driver yes and I definitely don’t want to tear it up. It is doing the job currently but just very slowly on hills. Would I feel a noticeable difference in pulling power in reality if I had it tuned to 454hp like the 460 factory setting? Are you sure there isn't just something wrong with it ? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576722 Share on other sites More sharing options...
0 JoeH Posted May 31 Share Posted May 31 My experience with E7 engines is fantastic longevity, poor torque. My experience with E6 engines (ENDT676 more specifically) is fantastic torque and power. I had a 2001 ETECH 400 in 2015 and it was a dog, but it got where it was going. 1995 E7-350 we currently have is pretty good, but it doesn't have the torque to pull through hills. Same as my 2003 AI-350. They get up hills, but they don't get to the top very fast. Reality is modern trucks have 20+ years of tech advancements and 2-3 extra liters of displacement. This engine won't match that. Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576738 Share on other sites More sharing options...
0 Mark T Posted May 31 Share Posted May 31 7 minutes ago, JoeH said: My experience with E7 engines is fantastic longevity, poor torque. My experience with E6 engines (ENDT676 more specifically) is fantastic torque and power. I had a 2001 ETECH 400 in 2015 and it was a dog, but it got where it was going. 1995 E7-350 we currently have is pretty good, but it doesn't have the torque to pull through hills. Same as my 2003 AI-350. They get up hills, but they don't get to the top very fast. Reality is modern trucks have 20+ years of tech advancements and 2-3 extra liters of displacement. This engine won't match that. True. They'll never come close to a ISX or something big. They usually aren't terrible either. 90 K is a handful for one. Especially if the truck can reach speeds over 70 MPH. They used to compensate for less engine torque with a lower axle , then give it lots of overdrive. 🤔 Maybe a stouter axle ratio is better money spent??? Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576741 Share on other sites More sharing options...
0 Adkat Posted Tuesday at 11:16 AM Share Posted Tuesday at 11:16 AM On 5/30/2025 at 9:11 PM, Shadyacresmack said: I have a 2001 CH613 with an e-7 400 @Shadyacresmack Is it the truck in the pic? It has 460 on the door. Engine or door swap, or did you mean 460? 460 to 525 with ECM tuning is possible, maybe. 400 to 525 with no hardware upgrades isn't. Is this old mate who's told you he can tune it 120hp+ with no hardware upgrades? Personally, all I can see happening from a copy and paste tune, is that it'll burn up your engine, and your wallet. If he said " bring your truck in and we'll tune it on the dyno" then maybe you'll have half a chance at a decent result. Can't talk from experience, but by all accounts, Rochester or Antrim and maybe others, could get you sorted for injectors and turbo and make some good gains without loosing too much reliability. As Joey said, 400 to 460, pretty sure you'll be pulling the cam to swap keys, plus turbo and injectors. That is if you have a 400. I'd start at the basics, check for boost leaks, fuel pressure, valve clearance. Get it plugged in and verify the engine settings too. Have you got a boost pressure & pyro gauge in the truck, these readings can tell you a lot about what's going on if your down on power. I'd say their essential if your running in hilly country. As mark said, diff ratio could be crippling you too, at 90k I wouldn't go taller than 4.3 diffs with a .73od box. I've got 4.56 in a 155k rated CLS 460 and even at 90k its not breaking any records. But it'll do it all day long regardless. Two things to remember, there ain't no replacement for displacement. And there ain't no free rides, you've gotta pay for the ponies. Adam 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576893 Share on other sites More sharing options...
0 Popular Post 07cl733 Posted Tuesday at 09:31 PM Popular Post Share Posted Tuesday at 09:31 PM Hello all, I'm not on here a lot, but saw this question and thought I'd throw in my experience for what it's worth. I run an E-tech 460 and regularly haul 80-90k and occasionally 120+ in the mountain west. I run 3.65:1 rears and overdrive 10 speed transmission, .71 over, I think. You couldn't give me 4.3 gears, an 18 speed would be nice when the mud gets deep. I have run a CL with an E9500 and a CL with a 565 ISX. They both would certainly out pull my brother's 460, that I ran with frequently, but I wouldn't gain enough time on him in a day to make up for the fuel mileage difference. He beat me at the bank every day. My other brother's E7 400 was definitely a little anemic. My brother sold that 460 at around 760k miles and the guy turned it up and lost the motor. That is all I know about it and it was a 98 E-tech, so it may have been a cam issue. I wish I still had a V8, (who wouldn't?) but am very pleased with the performance of the 460 and with any care, the life expectancy is phenomenal from these little engines. Also, try and find a newer truck as light as the one you have. Now if the topic were engine brake performance, I'd have a different opinion... In summation, I think if it is a 400, turn it to 460 and if it's a 460, run it. As others here have said, the E7 is only 11.9 liters. 4 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576938 Share on other sites More sharing options...
0 Joey Mack Posted Tuesday at 09:49 PM Share Posted Tuesday at 09:49 PM Thank you for your post... 07cl733. Great real time knowledge... Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-576941 Share on other sites More sharing options...
0 Shadyacresmack Posted Thursday at 04:28 PM Author Share Posted Thursday at 04:28 PM Yes it is the truck in the pic. Original 460 I guess was problematic so when another truck with a good running engine had an accident they swapped the 460 to the 400 and the engine runs great and smooth, no blow by or smoke. I just wish I had a bit more power in this hilly area. Sounds like. “ if it sounds to good to be true, it probably is”.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-577062 Share on other sites More sharing options...
0 880joe Posted yesterday at 12:32 AM Share Posted yesterday at 12:32 AM Being an 01 it should be a ccrs engine and I thought cam key was the same on all HP If that is correct could you not just put your 460 turbo injectors and ECM from original motor onto the 400 you now have and have your 460 again 1 Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-577085 Share on other sites More sharing options...
0 Joey Mack Posted yesterday at 12:36 AM Share Posted yesterday at 12:36 AM I don't remember the cut off dates between E-Tech and CCRS. Guess i need to hit the books..🍻 for some reason im thinking 2002-2003 for CCRS.. Quote Link to comment https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/#findComment-577086 Share on other sites More sharing options...
Question
Shadyacresmack
I have a 2001 CH613 with an e-7 400
around 800k on engine thar doesnt smoke and doesnt have excessive blow by. I run AG commodities every day up and down hilly terrain in the northeast.
im running 85-90k about 4-500 miles per day and I’d like more power
dieseltuner out of Tennessee says he can reprogram my ECM to 525hp with no mechanical upgrades needed.
is this realistic and has anyone here done that?
thanks, Dan
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https://www.bigmacktrucks.com/topic/75587-e-7-ecm-reprogramming/Share on other sites
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