fjh Posted October 31, 2021 Share Posted October 31, 2021 (edited) 12 hours ago, Joey Mack said: I may have made a boo boo again.. is it 5/8" and you use a 7/16" bolt... unbelievable..... i just did this 3 weeks ago and my brain just 'farted' I hope you get what i'm saying.... Too funny to me.... jojo Hey Bro ! brain Farts relieve pressure on brain strain !😇 They changed these 3 or 4 times extruded to intruded 9/16 to 15mm and 14mm how's a guy to remember everything your off the hook Buddy! We still love ya buddy 🥰 😂 Edited October 31, 2021 by fjh 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482183 Share on other sites More sharing options...
Joey Mack Posted October 31, 2021 Share Posted October 31, 2021 Thanks,,,, I laugh at myself often,, yes, a stress relief.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482184 Share on other sites More sharing options...
R.E.D Posted October 31, 2021 Share Posted October 31, 2021 I thank you all for the clarification.on a side note , I spoke to Mike at k&s and he doesn't have any cores to build injectors, therefore anyone wanting the 427/460 injectors will have to send those in and wait for him to build them to your specs..I opted to buy them from m&d distributors , they were brand new from Bosch ,no core needed 116$ each and a seal kit for like 3.50$ that includes both o rings and metal seal washer. Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482189 Share on other sites More sharing options...
880joe Posted October 31, 2021 Share Posted October 31, 2021 So were the new 427/460 injectors stock or oversized? Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482200 Share on other sites More sharing options...
R.E.D Posted November 1, 2021 Share Posted November 1, 2021 9 hours ago, 880joe said: So were the new 427/460 injectors stock or oversized? They were stock.m&d only carries oem specs. Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482245 Share on other sites More sharing options...
R.E.D Posted November 1, 2021 Share Posted November 1, 2021 (edited) Also replaced the Switzer s400, for a remanufactured borg warner.they told me that my Switzer was not repairable, I think they just didn't stock the parts for that old turbo.turbine shaft had no play , just a bad oil seal. Edited November 1, 2021 by R.E.D Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482246 Share on other sites More sharing options...
03' Big Red Posted November 1, 2021 Share Posted November 1, 2021 I have a 2003 RD686S with the AMI 370, can I put that software in a 1998 ECM RD688SX the 2003 has a Eaton the 1998 has a Allison, would that be a issue ? Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482250 Share on other sites More sharing options...
R.E.D Posted November 1, 2021 Share Posted November 1, 2021 49 minutes ago, 03' Big Red said: I have a 2003 RD686S with the AMI 370, can I put that software in a 1998 ECM RD688SX the 2003 has a Eaton the 1998 has a Allison, would that be a issue ? Someone correct me if I'm wrong , but Allisons are kinda limited on torque and hp options I believe. Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482251 Share on other sites More sharing options...
Onyx610 Posted November 1, 2021 Share Posted November 1, 2021 Correct, as with any transmission and clutch’s. Automatics are just a little more fragile with torque output. Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-482253 Share on other sites More sharing options...
DieselDog5.9 Posted December 1, 2021 Share Posted December 1, 2021 On 10/28/2021 at 10:52 AM, fjh said: I have an added sequence when installing injector lines! It involves tightening the the injector down snug then backing it off to just touching tight! Then tightening and torquing the line ! Theory behind this is it allows for the injector to find its happy place if there is any variance in the alignment ball in the head! Not sure if it helps on the e7 but have done this for ever! As we used to have issues with the V8 Lines back in the day, specially when they converted to the Robert bosch fuel pump and were using the ball for elinment on the injector it seemed to help doing this! just something to try if you have a leaker! This is similar to the sequence Cummins uses for injectors. Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-483771 Share on other sites More sharing options...
R.E.D Posted December 12, 2021 Share Posted December 12, 2021 I thought I would give everyone an update on how the truck is progressing. Being a quint axle dump truck grossing 72000lbs , I was averaging 4.3 mpg with the s400 turbo and higher flow exhaust manifold.then replaced two unit pumps that were bad, mpg went up to 4.70 mpg, finally I installed the 427/460 injectors and mpg went up to around 5mpg.These numbers have been very consistent for almost a month now..all that is left is 427hp update, I already have a efile ready to go with mack, but since there is so much work now, I can't be down one truck.Truck definitely has more power and requires less downshift ,but then I again power wasn't my main goal..I'm after the mpg, that's what's putting money back in my pocket , come on!! Thanks R.E.D You all have a blessed Sunday. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-484802 Share on other sites More sharing options...
MackE7760 Posted December 31, 2021 Share Posted December 31, 2021 Ok, we did this recipe on our 04 Granite, and are pretty happy with the results. With 26k hours on the motor, one hole a little lazy in the morning till well warmed up, and a bit more oil consumption than i like, we are considering a inframe. There is a shop not too far that has a mack guru that we are told can do it right with the dry, non oringed sleeves. Contemplating a cam change at the same downtime to eliminate the egr bump all together. If we were to do the cam.... A. What cam recommended B. What lifters(same?) Any other suggestions? Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-486258 Share on other sites More sharing options...
trey123 Posted March 11, 2022 Share Posted March 11, 2022 so does anyone have a 11gba number for a non egr cam. i have a 2006 ai400 with engine brake. i need a new cam and am trying to go with non egr Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-491652 Share on other sites More sharing options...
Mackpro Posted March 11, 2022 Share Posted March 11, 2022 50 minutes ago, trey123 said: so does anyone have a 11gba number for a non egr cam. i have a 2006 ai400 with engine brake. i need a new cam and am trying to go with non egr The AI and the 2001.5-2003.5 year model CCRS engines use the same EUP’s so in theory this should work and not have the internal EGR bump on the exhaust lobe of the AI engine. The only concern is if you have the Powerleash brake then I don’t know if it would work with the CCRS camshaft. I have heard that you can use a AC ASET cam in a AI but the difference in EUP part numbers make we wonder. They only make 3 different EUP’s . One for early ETECH, one for CCRS and AI then one for the AC engine. I’ll see if I can find some camshaft bulletins with part numbers and post them here Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-491659 Share on other sites More sharing options...
Mackpro Posted March 11, 2022 Share Posted March 11, 2022 Here is the Mack service bulletin SB 213035 for camshaft part numbers per engine https://dokumen.tips/documents/service-bulletin-mckenzie-tank-service-bulletin-number-sb-213-035-date-12003.html?page=1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-491661 Share on other sites More sharing options...
Mackpro Posted March 11, 2022 Share Posted March 11, 2022 Also don’t put a regular ETECH (1998.5-2001.5) cam in an AI engine. You will have very low power. I know because I did it . Back in around 2002 I was doing 3 to 4 camshaft jobs a week and a new MR came in with a cam down. The parts guys threw me a cam kit not realizing it was a AI engine. What really sucked it was a MR garbage truck 2 Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-491663 Share on other sites More sharing options...
trey123 Posted March 11, 2022 Share Posted March 11, 2022 thanks. so it looks like cam part#454GC5243 from AC engines manufactured after Dec 2002 may have a different cam profile for EUP's but most likely is powerleash compatible. Cam# 454GC5236A should work with EUP's but may not be powerleash compatible. i wonder what the difference between 454GC5236A and 454GC5236 is? Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-491674 Share on other sites More sharing options...
JoeH Posted December 22, 2023 Share Posted December 22, 2023 Can an admin sticky this thread somewhere easy to find? Thanks! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-543918 Share on other sites More sharing options...
03' Big Red Posted January 29 Share Posted January 29 Recently we installed injectors, rocker arms and shafts, camshaft,lifters and unit pumps trucks is 100% stock including exhaust manifold, turbo and injectors and it runs fabulous!! if you down shift at 1300 it’ll stay in the power band and up shifting at 1750-1800 keeps things moving smoothly. It will pull down to 1200 and keep on going we max out at 73280 lb here in PA for a Tri Axle dump 1 Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-545791 Share on other sites More sharing options...
03' Big Red Posted January 29 Share Posted January 29 On 11/1/2021 at 11:06 AM, Onyx610 said: Correct, as with any transmission and clutch’s. Automatics are just a little more fragile with torque output. I disagree on the Allison HD4560 being fragile the are much more forgiving than a manual trans and can handle the horsepower without a issue Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-545794 Share on other sites More sharing options...
03' Big Red Posted January 29 Share Posted January 29 44 minutes ago, 03' Big Red said: Recently we installed injectors, rocker arms and shafts, camshaft,lifters and unit pumps trucks is 100% stock including exhaust manifold, turbo and injectors and it runs fabulous!! if you down shift at 1300 it’ll stay in the power band and up shifting at 1750-1800 keeps things moving smoothly. It will pull down to 1200 and keep on going we max out at 73280 lb here in PA for a Tri Axle dump This would be a 2003 RD686S that has the AMI 370 program Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-545796 Share on other sites More sharing options...
JoeH Posted April 30 Share Posted April 30 On 7/20/2017 at 9:58 AM, Mackpro said: I gave some info to a guy on here who put a AC camshaft in his AI engine. I will post our private message and bulletins on here. His had no engine brake so it made it easier I believe. Best I remember there are 4 different AC camshafts. Camshaft changes and part #.pdf Camshaft changes ETECH ASET.pdf Long shot but is this camshaft changes file still available? Can't get the link to work. Quote Link to comment https://www.bigmacktrucks.com/topic/50251-mack-ai460-ai427-ami-low-torque-low-horsepower-poor-fuel-mileage-granite-dead-dog-remediation/page/11/#findComment-550686 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.