Bigjohn4300

Finished today installing manifold, GR 5”, yts 467 and 100hp injectors. It feels stronger sometimes, but the issue of low power for a while, then suddenly motor pitch changes, turbo spools lots higher and pretty good power thereafter is still there. Its random, sometimes great power in first gear, other times it may be weak for a few gears, then decide to make power. It seems to be related to throttle application, ie if its doing its “low power” thing, a rapid release and reapplication of throttle once or twice MAY bring in the power, but sometimes not. We changed the accelerator early in our ownership of this truck chasing this issue to no avail. Any ideas? I have a boost gauge ordered, maybe once installed it may give me more info to chase this issue with. It appears reading through the forums that a few others have experienced the same issues with similar age trucks, but I haven’t seen any final cures posted.

Finished today installing manifold, GR 5”, yts 467 and 100hp injectors. It feels stronger sometimes, but the issue of low power for a while, then suddenly motor pitch changes, turbo spools lots higher and pretty good power thereafter is still there. Its random, sometimes great power in first gear, other times it may be weak for a few gears, then decide to make power. It seems to be related to throttle application, ie if its doing its “low power” thing, a rapid release and reapplication of throttle once or twice MAY bring in the power, but sometimes not. We changed the accelerator early in our ownership of this truck chasing this issue to no avail. Any ideas? I have a boost gauge ordered, maybe once installed it may give me more info to chase this issue with. It appears reading through the forums that a few others have experienced the same issues with similar age trucks, but I haven’t seen any final cures posted.

Ok thanks! Late this afternoon we had a line made for it. Much appreciated

I have a 04 Granite, AI300, allison 4500 with 4.64 gears, 17 yard dump. Working in the plants they will load her to 60-65k with 610 limestone, and other than the “AI lag” that we may have cured this weekend, the 300 handles it fine, even up the ramps. When tagging my excavator im at 82k, and the 300 could use a little more muscle, but gets it done. We changed turbo and injectors this weekend, we will see next week how she does.

I ordered a used jake brake setup to replace my current (parts missing since I purchased the truck) brake from Manders. Was buttoning everything up from manifold/exhaust/injectors change to cripple egr, and noticed that one of the internal oil lines in the jake was broken, looks like from shipping (broke at the check valve). We put a plug in the oil port and started it, but were scared to run it long like this not knowing if something was starving for oil, or does it only work the jake. I figure with MLK day tomorrow chances of getting one is low. Does anyone know for certain if it would or wouldn’t hurt anything to run it like this? I really want to see how it does! (225)266-6350 Thanks

Singlestack! Did you ever figure out the intermittent low power issue? Im having the same issues, may pull good , then reduction of boost(almost like derating), then comes back. Sometimes i can lift off throttle, and get back on it and power resumes, or may have to do it multiple times, or just ride it out. (225)266-6350 talk/text

Can you still get the AMI 370 file? I thought I read it was no longer available.

Man that is sweet!

Maxidyne, I’ll agree that 300hp is adequate when it’s just the loaded truck, but when we are tagging the excavator, we are around 82k, and then them 300 horses are dragging ass.

Daytona Marine (DME-900) was what was in our Shrimpboat

who built it? Whats it rated for? What model? Idk which i love better, the ally transmission or the mack its in!!!

The 04 Allison dump i have was a mixer in its first life, good specs for a dump......double frame, 502 ratio, 52 camelback on bronze, 23k(?22 maybe) front, dual steering, heavy double frame and low miles (60k i think when i bought it), makes a hell for stout tandem for sure (but i need more than 300 HP)

MK 51105a-5 $331+tax MK 41112M2-5 $315 +tax M-132 direct fit muffler $127 +tax these prices are delivered to the baton rouge Truck Pro

Drivetrain is in excellent shape, 157k, conservatively operated and well maintained for 110k of that, will the 375 file and injectors eliminate the 4-6 seconds of lag on initial takeoff? I really want to get that gone, makes pulling out in some situations really sketchy!

Yes I can post the quoted prices, truck pro quoted them, they are higher that listed here, but I’ll pay to play, they said 2-3 week delivery after ordering My granite has been updated to 12B, is that all I need to be ok with exhaust, manifold, turbo and injectors? Or do I need to try to get them to set it to a higher HP as well?

Ok, so ive been saving my nickles to do the 5 inch exhaust(my local truck pro can get them, has already quoted), exhaust manifold, K&S injectors and 400 turbo, but i just read something that concerns me, if my local dealer has the "Grey Motor Amnesia", does that mean that installing the parts wont help? Or just that it would run better if it had the dealer tune it after? Just curious, if there was a way to convince the engine brain that the engine had boost, say 10 lbs or some low number like that, by fooling the boost sensor/manifold pressure sensor electronically, would that allow more fueling earlier? Maybe allow the actual boost to build quicker, minimizing the low end lag? Maybe a resistor or something in the circuit? Im not interested in rolling coal, just thinking aloud

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Hey we both have the same issue, sometimes my 04/300/Allison does the exact same thing! Sometimes from a dead stop, almost instant boost, good power...sometimes normal power, then sometimes won’t build good boost through first/second maybe into third before you hear the motor pitch deepen(more fuel)followed by rise in boost and normal power.

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.?

Had the same issues when hot(above 90) and grossing 81, pulled rad and had it rodded out, stays on lower end of green now

I had to go to three different dealers before i finally found one who would update my 04 AI from 9B to 12B, and it took that shop almost half a day to actually get it to work, they had to flash it (called it that i believe) several times before it "took". Sounds like we are chasing the same intermittent low power issue

Ill have to second what "HatCity" said, my local dealer couldnt/wouldnt take mine from 9b to 12b, but a dealer 80 miles away did it. They had to fool with it quite a bit, took three attempts to get it to take, but they got it. Didnt correct my main issue of intermittent low power, but it did reduce its severity and frequency i believe. But it did introduce a 10 minute idle shutdown i didnt have before, need to see if the local dealer can kill that off

Quite as stock?

Awesome! Guess I don't need to email him anymore requesting part numbers, please post when you come up with a high flowing "quite" 5 in 5 out muffler

Nice truck!