Mack Technician Posted August 21, 2017 Author Share Posted August 21, 2017 Any updates on how this truck is doing fuel/power wise? Also a thought with the cam, can a machine shop grind and polish down the extra bump to eliminate the egr? I realize it's still labor intensive but maybe save a little on the cam purchase. Audio interview. Log Dogg.m4a (Ps-It is an '05) 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/4/#findComment-378007 Share on other sites More sharing options...
dcrow Posted August 22, 2017 Share Posted August 22, 2017 Thanks for the update Iv'e been following this like it's my own. I think That 5" exhaust will make a big difference, get every thing flowing better. 2 questions thou ,why not build the exhaust yourself seams like it would be easy cut up a few elbows and some straight pipe and weld them back together the way you want them. And second this is the stock cam still right. 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/4/#findComment-378159 Share on other sites More sharing options...
Mack Technician Posted August 23, 2017 Author Share Posted August 23, 2017 (edited) Also hoping for a Pyro drop. 1. In my mind it would have taken 6 trips to town, 8 hours, 5 restock fees for pipes we guess ordered but couldn't use. I like the idea of having it built to exact specs by a group of guys who do it well, all day, for a (IMO) pretty good price. A couple years ago I built a gantry for pulling up deer then saw one in a magazine for less than the price of my parts. I may have been able to coat the piece-together-pipe, but if it did not hold I'd have a ball of rust by January 2018. The volume of salt used up here is really something. Currently, they liquid salt spray before a storm to stop the bond, rock salt/sand mix during the storm and rock salt after the pack-down ice sets. 2. We are running the stock AI cam. Edited August 23, 2017 by Mack Technician 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/4/#findComment-378209 Share on other sites More sharing options...
Mack Technician Posted August 23, 2017 Author Share Posted August 23, 2017 (edited) On 8/4/2017 at 5:54 AM, dcrow said: Any updates on how this truck is doing fuel/power wise? Also a thought with the cam, can a machine shop grind and polish down the extra bump to eliminate the egr? I realize it's still labor intensive but maybe save a little on the cam purchase. I called Barry Cam Service out of Minnesota. He is tooled up to rebuild and cut old production E7 and E9 cams with good success, but has no templates to cut a CCRS/AI/AC cam. He said if I brought in a pre-AI (power leash), or AC cam with the exhaust profile I want, he would build a template and "match trim" the six AI cam exhaust lobes. He would be charging time and material so not cheap for the first guy stepping up to the plate. Edited October 3, 2017 by Mack Technician 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/4/#findComment-378222 Share on other sites More sharing options...
Mack Technician Posted September 5, 2017 Author Share Posted September 5, 2017 Rock got back to us with a stack muffler that will bolt on with no fabrication. It is a 5"inlet/5"outlet @ 51" length and 9" diameter. PART # M-132 Cost w/mark-up $127.00 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/4/#findComment-378966 Share on other sites More sharing options...
Mack Technician Posted April 30, 2018 Author Share Posted April 30, 2018 (edited) Stripped down the pipes and made a comparison of exhausts........looks really good. Be Advised: When I came to pick up my pipes the final bill was almost double my original quote. I raised issue with my Mack Dealership parts guy and he went back on Grand Rock for satisfaction. They dropped the price to the original numbers I listed on this thread. If anyone buys from Grand I'm curious to know what the cost is? Are they going to jack it through the ceiling or was it a case of Grand actually investing a lot of retool and time to get this "first production" of a 5" custom? Hopefully just an attempt to recoup loss and the upgrade hasn't now become less practical due to expense. Edited April 30, 2018 by Mack Technician 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/4/#findComment-397966 Share on other sites More sharing options...
Mack Technician Posted April 30, 2018 Author Share Posted April 30, 2018 The pipes are a very good dimensional likeness. Note to user: Save yourself some trouble and pull the air cleaner housing, w/rubber inlet tube, right away. You are going to need to pull it to fit the 5" into the existing space so you may as well enjoy the accessibility while removing the 4". The 4" can be otherwise be removed and installed with the air cleaner in place. 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/4/#findComment-397967 Share on other sites More sharing options...
Mack Technician Posted April 30, 2018 Author Share Posted April 30, 2018 GOOD RIDDANCE !!!! 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/4/#findComment-397968 Share on other sites More sharing options...
j hancock Posted April 30, 2018 Share Posted April 30, 2018 Looks much Better! 1 Quote JimIt doesn't cost anything to pay attention. 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/4/#findComment-397977 Share on other sites More sharing options...
Mack Technician Posted May 1, 2018 Author Share Posted May 1, 2018 The Muffler purchased from Grand does not have a break-in baffle. It is straight through design. The pic is the closed baffle of the old muffler, we will see if the audible changed much. Yup, I did get a little medieval on the muffler to get it off....things been choking the dog for 12 years, why be nice? The 4" clamp and 5" replacement are almost a perfect cross over. Everything must expand 1/2" wider from imagined center-line of exhaust and it is about a perfect 1/2" drop in the 5" saddle. 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/4/#findComment-398019 Share on other sites More sharing options...
Mack Technician Posted May 2, 2018 Author Share Posted May 2, 2018 Nothing to do with exhaust, but I had lots of time in between to play with the Green Machine. 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/4/#findComment-398079 Share on other sites More sharing options...
fullfuel01 Posted May 3, 2018 Share Posted May 3, 2018 I'm just done doing a set of dual exhaust on a 01 Granite. 5'' from the turbo to the muffler and the Y is under the cab. there is a repto on the truck too.. 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/4/#findComment-398147 Share on other sites More sharing options...
Mack Technician Posted May 7, 2018 Author Share Posted May 7, 2018 (edited) Exhaust is installed, sounds very conservative. The only difference is not in the baritone, but the whistle. The (now missing) baffle apparently reflected the sound of the turbo harmonics and it now has a magnified spooling sound. You can hear the impeller talking, but the actual depth of tone is still very similar to what we had. Edited May 8, 2018 by Mack Technician 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/4/#findComment-398476 Share on other sites More sharing options...
Mack Technician Posted May 7, 2018 Author Share Posted May 7, 2018 (edited) Everything fit perfect. Compress the flex pipe and cut an additional 6-7" beyond gap measurement for good solid overlap. Remember the cab bounce motion is completely absorbed in the flex pipe since stack is cab-hung. If you get cheap, and don't make a deep overlap, you will pay for it later with motion loosening clamps and wearing a slit cut in pipe. Make sure you get decent stainless steel flex, if it rusts to -zero- flexibility it's shot and taking the pipes with it. Did a simple chop and weld to 5" for bracket. You will want rear pipe to lay on frame when cab bags are deflated. Call me a complainer..................but yes, they will put the sticker in the one place you never would. It's out hauling equipment today so waiting on results of pyro and boost adjustment. We were able to reuse the pyro so results should be unbiased to old numbers. A friend asked him to tug their 70,000lb excavator to a site. Think He is a little pink to prove the Log Dog. Edited May 8, 2018 by Mack Technician 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/4/#findComment-398478 Share on other sites More sharing options...
Popular Post Mack Technician Posted May 9, 2018 Author Popular Post Share Posted May 9, 2018 (edited) Numbers are in.... While pulling his heaviest piece of equipment he generally reached 1050 degrees on Dog's pyro and then backed off to protect the engine. On his hardest pull he now maxed out at 910 degrees and never had to back out. How much did he drop in terms of degrees...who knows actual top achievable number? The truck may have been able transform the turbo to soft red licorice, but now is unable to........ so mission accomplished. Turbo boost top pressure did not change. He says torque and speed sustainability increased to a low threshold of "noticeable improvement". If you have had a success story turning one of these units around please feel inclined and encouraged to throw your story in the mix! Enjoy, Jason Edited September 11, 2018 by Mack Technician 5 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/4/#findComment-398605 Share on other sites More sharing options...
Popular Post Mack Technician Posted July 23, 2018 Author Popular Post Share Posted July 23, 2018 (edited) Want to add an additional thought. I was talking to a happy convert last night and it occurred to me you should make it mandatory to have a Pyro in your truck so you can manage your heat. In this case the person was satisfied with the performance of only the K&S injector swap, was running along side the MP8's and was not going to modify the engine any further. He did not have a pyro or boost gauge and was running an AI427 HP. Your exhaust valves use the closed position "dwell" time to transfer heat from of the valve head into the cooled cylinder head. Because of the bump your cooling dwell period is reduced and could predispose you to overheating your valve train. The problem compounds since your valve closed cooling period is not only reduced, but during the bump scavenging period your back-feeding fire over the valve so heat exposure time increases. IMO- you may be tempting a failure (turbo, valve and manifold) if you don't observe/monitor/manage your heat. If you keep the flow restrictions at the manifold/turbo/4” exhaust, even more so. Edited July 24, 2018 by Mack Technician 2 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/4/#findComment-402927 Share on other sites More sharing options...
03' Big Red Posted July 27, 2018 Share Posted July 27, 2018 This is some great info !! 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/4/#findComment-403151 Share on other sites More sharing options...
Bigjohn4300 Posted August 31, 2018 Share Posted August 31, 2018 So if I read and am understanding correct, all of the ccrs motors, from the 300 to the 460 use the same EUP p.n.? 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/4/#findComment-405218 Share on other sites More sharing options...
Mackpro Posted September 1, 2018 Share Posted September 1, 2018 22 hours ago, Bigjohn4300 said: So if I read and am understanding correct, all of the ccrs motors, from the 300 to the 460 use the same EUP p.n.? There only 3 different EUP part numbers. One for the early ETECH. One for the ASET AC engine and one for the CCRS and ASET AI engines. HP ratings don't matter regarding EUP's . 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/4/#findComment-405276 Share on other sites More sharing options...
fullfuel01 Posted September 1, 2018 Share Posted September 1, 2018 what difference do they have in between Mackpro? 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/4/#findComment-405281 Share on other sites More sharing options...
Mackpro Posted September 2, 2018 Share Posted September 2, 2018 I don't know , they look exactly the same as each other. 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/4/#findComment-405309 Share on other sites More sharing options...
Mack Technician Posted September 11, 2018 Author Share Posted September 11, 2018 Old Red Mack's transition out of factory limp mode....... 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/4/#findComment-405829 Share on other sites More sharing options...
Mack Technician Posted October 9, 2018 Author Share Posted October 9, 2018 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/4/#findComment-407585 Share on other sites More sharing options...
Mack Technician Posted October 9, 2018 Author Share Posted October 9, 2018 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/4/#findComment-407586 Share on other sites More sharing options...
Mack Technician Posted October 9, 2018 Author Share Posted October 9, 2018 (edited) AI Turbo and Injector Specs.pdf Power curve specs.... AI460.pdf AI427.pdf AI400.pdf AI375A.pdf AMI370.pdf AI350.pdf AMI335.pdf AMI300.pdf AI300A.pdf Edited October 10, 2018 by Mack Technician 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/4/#findComment-407593 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.