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Mack AI 460 AI427 AMI low torque low horsepower poor fuel mileage granite , dead dog , remediation

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On ‎6‎/‎21‎/‎2017 at 12:03 PM, Mack Technician said:

First I'd like to send a note to any other clueless BMT newbies..... NEVER click the delete at the bottom of your "New Topic" page "moderation action" unless you want to lose all three pages of your post.  I'm dedicating this second post series to all truck owners who regretted buying an AI Granite and as a memorial for all the awesome tips from NELM and MACKPRO that I cast into eternal cyber damnation.  

MT I have a friend that bought one of the AI400s at a Gov.auction for a replacement engine. The trouble is the truck has the E7 and he is wanting to install the AI400. Can it be done? 

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On ‎12‎/‎15‎/‎2018 at 8:55 AM, bjohnson1781 said:

So the AI400 can not just be installed as is in a truck that had the E7?  If not can parts from the E7 be installed on the AI400 like the heads,camshaft and other parts? I think he should have checked on this before buying the engine. I drove a Granite with  the AI engine and it was a gutless piece of junk. I'll get more info on the year of truck. Thanks for the info.

ASET heads have water jacket updates & head gasket is different, larger nozzle sleeve holder and also has no injector leakage drain-back. Addition of an Idler between crank and cami ASET means power steering and compressor rotate in the opposite direction of an E7. Vibration Dampner hub on ASET is 3/8” shorter than E7. Not certain on this but pushtube holes in head of ASET May have 4 degrees more tilt. I can’t tell if all E-Tech up have the addition of 4 degrees or just ASET heads. Your 2001 current engine MAY be CCRS, that was the year of inception. In which case your camshaft, EUP’s(exchangeable, but not shared), lifters, pushtubes and valve train will be shared parts. The lifters could be steel and not ceramic on the 01. ASET should be ceramic. Inspect the old motor for the little fuel return tube between front&rear head and return fitting barb to confirm CCRS. If you had an AI300 it could have the same, old school, front water pump design, since it is above 300 you will have a completely different water pump/housing design. 

You might have good luck selling it right here on BMT. Couple months ago I spent a week trying to find one of these with AlexanderMack. All we could locate was AI300’s everywhere with the old style water pump system. He had to pay extra labor (and no useable x-tra spare parts) to have the engine converted to the higher horse cooling system package. There was a member who had the right motor for sale, but he was MIA. 

Edited by Mack Technician

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Ok folks I started with 2006 granite with ami 370hp 13 sp fuller and 4.17 mack rears that I called the "boat anchor" when I first bought it.   Hauling road construction materials, heavy equipment, and grain so loads vary from 70,000 to 85000 lbs.  sluggish, no low end tourque, terrible fuel millage, and just tough to drive in the hills was a far cry from my old ch with a 400 or even my old r models with 350.  So I went to work on here and learned how to make these trucks run.  My first step was to take my 370 to 427, which I did in by having my local injector shop resize the injectors and then drove to local mack dealership to have it set to 427.  Results...better definitely than before and was somewhat ok with how it ran so I ran it all season that way.  This fall I decided to go a little further and do the conversion that macktechnician has done on here.  I however started in reverse order to see what would happen.  I started by leaving everything alone and putting the full 5'' exhaust system on and noticed no real difference other than it sounded a lot better with the flow threw muffler.  Next I installed the etech manifold and the s 400 turbo and noticed a little bit of pick up but not much at all.   also boost went from 32lbs to 30lbs when doing so.  Finally I installed the injectors from mike at k and s.  The truck is now a completely different truck.  Low end tourque and lug is back where its supposed to be, power is awesome when you need it but the thing that I find most impressive about it is just how easy the engine has to work now obviously less pedal and less work to drive.  Less shifting.  As far as millage goes it definitely didn't go down any doing some of the same runs as before but that's hard to tell this time of year with winter time fuel and heavier loads.  An amazing, relatively inexpensive(I figure I had $2000 in parts, I got a turbo dirt cheap) creation that anyone that knows anything about trucks can do in there own shop.  Mach technician has done a great job of listing part numbers, pictures, and information on this topic.  with out this a lot of us would be still unhappy campers and cussing mack every day!  thanks again!

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22 hours ago, Mackvette1 said:

Ok folks I started with 2006 granite with ami 370hp 13 sp fuller and 4.17 mack rears that I called the "boat anchor" when I first bought it.   Hauling road construction materials, heavy equipment, and grain so loads vary from 70,000 to 85000 lbs.  sluggish, no low end tourque, terrible fuel millage, and just tough to drive in the hills was a far cry from my old ch with a 400 or even my old r models with 350.  So I went to work on here and learned how to make these trucks run.  My first step was to take my 370 to 427, which I did in by having my local injector shop resize the injectors and then drove to local mack dealership to have it set to 427.  Results...better definitely than before and was somewhat ok with how it ran so I ran it all season that way.  This fall I decided to go a little further and do the conversion that macktechnician has done on here.  I however started in reverse order to see what would happen.  I started by leaving everything alone and putting the full 5'' exhaust system on and noticed no real difference other than it sounded a lot better with the flow threw muffler.  Next I installed the etech manifold and the s 400 turbo and noticed a little bit of pick up but not much at all.   also boost went from 32lbs to 30lbs when doing so.  Finally I installed the injectors from mike at k and s.  The truck is now a completely different truck.  Low end tourque and lug is back where its supposed to be, power is awesome when you need it but the thing that I find most impressive about it is just how easy the engine has to work now obviously less pedal and less work to drive.  Less shifting.  As far as millage goes it definitely didn't go down any doing some of the same runs as before but that's hard to tell this time of year with winter time fuel and heavier loads.  An amazing, relatively inexpensive(I figure I had $2000 in parts, I got a turbo dirt cheap) creation that anyone that knows anything about trucks can do in there own shop.  Mach technician has done a great job of listing part numbers, pictures, and information on this topic.  with out this a lot of us would be still unhappy campers and cussing mack every day!  thanks again!

Great returns Mackvette!!! :clap:

 

Edited by Mack Technician

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