dondiesel444 Posted August 24, 2014 Share Posted August 24, 2014 (edited) whats the best way to get more power out of an E7 Etech? Edited October 13, 2015 by dondiesel444 Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted August 24, 2014 Share Posted August 24, 2014 Try letting the rpm pull down to 100 or 1200 rpm and see if you get some torque.It is hard some times to get use to that foe some guys but there is no reason to turn the engine at 2000 rpm all the time.Lower rpm higher fuel mileage. Quote glenn akers Link to comment Share on other sites More sharing options...
rsb502 Posted August 24, 2014 Share Posted August 24, 2014 You do have to remember your running a 12 liter now not a 14 liter, that being said they can be made to run well. First don't run it wide open, if its an 01 its only an 1800rpm engine, not a 2100rpm engine. You also don't have to stick with the Mack 400-427-460 ratings, I'm not sure why but it seems no one thinks you can do anything aftermarket but you can. Rochester Fuel Injection has a turbo, injectors and computer programming. I'm sure Antrim Diesel can do things for the etech engines too. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment Share on other sites More sharing options...
keg1 Posted August 24, 2014 Share Posted August 24, 2014 A 13 speed won't help much. I changed my 9 to a13 and it didn't help. I've had my 2000 Ch 400 for 9 years and it's always been sick on the hills. Mack told me there was nothing you could do to it. That's why I run my R model. The 350 runs circles around the 400. Quote Link to comment Share on other sites More sharing options...
dondiesel444 Posted August 24, 2014 Author Share Posted August 24, 2014 (edited) 1 Edited October 13, 2015 by dondiesel444 Quote Link to comment Share on other sites More sharing options...
gearhead204 Posted August 24, 2014 Share Posted August 24, 2014 if your new to mack, what type of manifold pressure are you getting? when pulling good you should see 30+ to36 lbs boost if your in the 20's check the charge air cooler. Quote Link to comment Share on other sites More sharing options...
dondiesel444 Posted August 24, 2014 Author Share Posted August 24, 2014 (edited) 1 Edited October 13, 2015 by dondiesel444 Quote Link to comment Share on other sites More sharing options...
mack mhe9 Posted August 24, 2014 Share Posted August 24, 2014 Hated my 01 etech 400 9spd I sold it. Yes Antrin Diesel can help as well as Rochester, like 84SD said. Just picked up a 01 etech 460 and like it a lot better then the 400. I always thought my elf that a 13 or 18 spd would help, you could split the gear without holding the engine at 1400 on a long pull just building heat cause your to high on the gear to down shift. Good luck. 1 Quote Link to comment Share on other sites More sharing options...
dondiesel444 Posted August 24, 2014 Author Share Posted August 24, 2014 (edited) 1 Edited October 13, 2015 by dondiesel444 Quote Link to comment Share on other sites More sharing options...
dondiesel444 Posted August 24, 2014 Author Share Posted August 24, 2014 (edited) 1 Edited October 13, 2015 by dondiesel444 Quote Link to comment Share on other sites More sharing options...
Refined Trucker Posted August 24, 2014 Share Posted August 24, 2014 I'm in same boat. Bought first Mack in April. 01 e7 427 13spd Not happy at all with power. Hills scare it to death grossing 80k. Just sold my ole Pete so going to spend some of the proceeds at Rochester I think. Like you rest of truck is very nice but not enough to overcome lack of torque. Quote Link to comment Share on other sites More sharing options...
Cl713 Posted August 25, 2014 Share Posted August 25, 2014 I have a 99 cl713 with 460 etech and 18 speed, and I too am continually dissapointed with power. I use the truck as a lowboy tractor, and very rarely gross over 90k and it is terrified of hills, the jake brake switch has to be off because it's impossible to shift with it on, and the transmission is tight so you have to be Johnny on the spot with every shift or you will be starting over. My old 3406b 400 will pull circles around this truck, and it has 1.2 million on the engine. Quote Link to comment Share on other sites More sharing options...
rw613 Posted August 25, 2014 Share Posted August 25, 2014 I drive a 94 cl 600 every day went to antram diesel got my turbo and injectors about 9 years ago and tis truck is a joy to drive there aint no 500 that want any parts of this truck and I haul between 83to 850000......and it has 2million miles on it Quote Link to comment Share on other sites More sharing options...
Bigdogtrucker Posted August 25, 2014 Share Posted August 25, 2014 I've driven a lot of 427/460's all in tri-axle dumps.Can't stand these engines in that application,i'll take a mechanical injection any day of the week!Such a narrow power band,especially when coming from Maxidynes .Add to that all the problems we had with them in the late "90's-early "00's! Quote Link to comment Share on other sites More sharing options...
dondiesel444 Posted August 25, 2014 Author Share Posted August 25, 2014 (edited) 1 Edited October 13, 2015 by dondiesel444 Quote Link to comment Share on other sites More sharing options...
MACKTRUCKS4 Posted August 26, 2014 Share Posted August 26, 2014 I worked my 2000 etech 400 with a stock 427 turbo, superflow injectors. They told me those injectors and turbo would give me around 490, and I believe them. This truck has no problems on hills, water temp hits 210 on hard pulls. I out pull a friend with a 525 cat on hills. Stock cam, no computer work done. If your worried about the miles, drop the pan and do at least rods and mains. Running a 8LL, but only grossing 73,280. 1 Quote Live every day like it's your last, because one of these days, it will be. Link to comment Share on other sites More sharing options...
Kansas farmer Posted August 26, 2014 Share Posted August 26, 2014 We had an issue with our e7 400. Didn't seem to have power on hills like you say turned the pump up about 10% and still didn't think it pulled like it should. We checked fuel lines etc and checked fuel pressure which was a little low. There is a check valve in our pump that they said is supposed to hold the fuel pressure we took the plug and the spring out and put a small ball bearing behind it to compress the spring more and it seemed to help a lot. I'm sure some guys on here know more about it than me. Quote Link to comment Share on other sites More sharing options...
mowerman Posted August 26, 2014 Share Posted August 26, 2014 sorry to hear that,,,no suggestions,,,except trade up to the 460,,,after running a 3406,,,your not going to be happy with anything else.lol.bob Quote Link to comment Share on other sites More sharing options...
bts-4120 Posted August 27, 2014 Share Posted August 27, 2014 460's and 10 speeds don't perform well together either. 460xt file would be the hotter of the factory files if you could get it. injectors turbo and a 427 file may be the best you would be able to come up with. bet the cat was pulling alot more than 350 hp 1 Quote Link to comment Share on other sites More sharing options...
Refined Trucker Posted September 15, 2014 Share Posted September 15, 2014 Just got ecm back with a 100hp tune on my 01 427. Just ran Saturday but has improved sluggishness and boost comes up quicker and higher than before. Seems to have quite a bit more staying power on the rolling hills that I was on. Time will tell if it was a good investment or not. Keeping my fingers crossed for now. Quote Link to comment Share on other sites More sharing options...
dds92780 Posted September 15, 2014 Share Posted September 15, 2014 Let me know if your mpg goes up at all. Mine sure went down from bumping up pump and doing bigger injectors. Quote Slow and Steady Wins the Race! Link to comment Share on other sites More sharing options...
theakerstwo Posted September 15, 2014 Share Posted September 15, 2014 Just remember something that i found to be true 50 years ago.Two things in life people lie about more than any thing else is fuel mileage and their sex life. 2 Quote glenn akers Link to comment Share on other sites More sharing options...
Refined Trucker Posted September 16, 2014 Share Posted September 16, 2014 I watch it pretty close has been hovering real close to 7 since I bought it in May. Have just run little over 500 miles since the reflash. First check was 6.9 if that holds will be great because it pulls about same as my previous truck wich was a 525 N14 this one has 3.73 rears and previous truck was 3.55 so the lower gears are making up for the smaller displacement. All in all I'm happy with power now. if this hadn't worked I'm pretty sure the dog was going to find a new home but not now. Quote Link to comment Share on other sites More sharing options...
Refined Trucker Posted September 17, 2014 Share Posted September 17, 2014 7.18 today all two lane and some stop and go. I pull a gas can, so am empty over 50% but am pleased with this performance so far. Pulled pretty good hill coming out of 30mph zone today full gear higher and 7mph faster than it would at stock 427 setting. Always grossing 82000 min when loaded. Quote Link to comment Share on other sites More sharing options...
dondiesel444 Posted September 25, 2014 Author Share Posted September 25, 2014 (edited) Just got ecm back with a 100hp tune on my 01 427. Just ran Saturday but has improved sluggishness and boost comes up quicker and higher than before. Seems to have quite a bit more staying power on the rolling hills that I was on. Time will tell if it was a good investment or not. Keeping my fingers crossed for now.1 Edited October 13, 2015 by dondiesel444 Quote Link to comment Share on other sites More sharing options...
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