gio400
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Posts posted by gio400
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1 hour ago, 880joe said:
A mack 631gc5173 works good for me
What model and Hp engine you have?
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Good day which turbo is better for a Mack etech 400 a Schwitzer s300 or a borgerwarner 174832 s400. Which will have better performance under heavy loads?
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18 hours ago, mrsmackpaul said:
Guessing something from Europe, Scania, Volvo or Benz
Maybe DAF
Paul
Ok, how about the American trucks, which is the strongest out off all of them
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Good day I’m doing a survey to see which brand trucks have the strongest crash test rating
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18 minutes ago, 880joe said:
The 460's were the only one's wastegated I believe
I ask because I have a series 60 380hp with a VGT turbo and it feels more aggressive than my Mack etech 400
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Does the Mack etech turbo have a wastegate or it’s non wategated?
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55 minutes ago, 67RModel said:
Mack top loader axles are a double reduction design. Basically the torque multiplication is done in two steps rather than one. Much less strain on components and less of a chance to break things. Much more desirable for what you are attempting to do.
With 8ll and 6.14 ratio will give me 89.39 %reduction in ll and in ll reverse 93.45 % wouldn’t that be good
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8 minutes ago, gio400 said:
44 meritor axles with 6.14 ratio
What’s the difference with Mack top loader vs meritor axles if they had the same differential ratio
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5 hours ago, 67RModel said:
I foresee lots of driveline abuse and broken axle shafts or universal joints. Do you understand how steep a 30% grade is? A lot of people would struggle to walk up a 30% grade. Canton Avenue in Pittsburgh is often cited officially and unofficially as the steepest public street in North America at 37% grade. I have driven up and down it in a Honda car and it was scary quite frankly. Plus the top 2/3 are made of brick. Technically your not allowed to drive down it only up. I could not imagine driving up that hill in a truck loaded with 4000 gallons of water. Let alone stopping a 4000 gallon tanker on that hill and trying to get started again. If you did you would never shift out of Low gear until you reached the top. Forget 400hp. What you need is lots of gear reduction preferably planetary reductions at the wheel ends. Are the axles in the truck Mack top loader double reduction or conventional Meritor axles? I honestly would be worried about starving the engine for oil at such an extreme angle. I'm not familiar with where the oil pickup(s) are on these trucks but depending on where it is you might be sucking wind either going up or down.
44 meritor axles with 6.14 ratio
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5 hours ago, JoeH said:
Depends how good you are with a clutch.
What year is the truck? The vmac III engines the computer will assist by maintaining idle as a minimum.
On a hill from a dead stop, you have one foot on clutch, one on brake. Use lowest gear you have, which on an 8LL is LL. Ease the clutch out til you feel it make contact and start to grab just enough to hold truck from rolling backwards, then your brake foot moves to accel pedal and gives it an extra couple hundred rpms at most while your left foot eases the clutch out the rest of the way.
Truck is a 2001 with etech 400
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How will do in a stop and start situation?
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The hills is between 20-30% grade steep
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Goodnight how will a Mack e7 400 with 8ll and 6.14 diff carrying 4000 gallon of water perform on hills 30-40% grade. Will turning off be good with 6.14 ratio
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Just now, gio400 said:
With the Viens stuck open , will the truck burn more fuel?
I notice the problem when I was going up a hill loaded and the truck started pooping and dumping black smoke
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31 minutes ago, Joey Mack said:
From what I re ember, that setup is pnuematic. It is a simple system using boost pressure to open the waste gate when boost is too high. I do not recall a computer is used to control it.. You should be able to un hook the accuator and move the lever to see if the ring nozzle is sticking. also the pin could be frozen which will jam the ring nozzle in any position. I believe the accuator is replaceable with out needing a computer.. I have also taken these turbos apart to clean the ring nozzle.. You have options. It would be good to see a picture of the turbo.. Jojo
With the Viens stuck open , will the truck burn more fuel?
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6 hours ago, fjh said:
pyro temp up with no go ! the turbo exhaust snail will look blueish also ! NOTE the year and model of truck would help here! Just sayin! The waste gate was used in two years of trucks 2001- 2003 I believe ! Max boost 33 Psi and then everything changed to the EGR fiasco either VGT or AI !
It’s a vnt turbo, so which means the vents were stuck on open, it’s a 2004 Detroit 12.7 series 60 egr
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3 minutes ago, BOBWhite said:
Hardly any boost and it won't make much noise. Depending on the model you should be able to manually move the actuator to see if it's stuck.
Will it be dumping a lot of fuel also?
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What are the symptoms of an stuck open wastegate
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Good day im looking for the fuel and oil filter number for a 2004 12.7 Detroit engine. I attach the engine info
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I have a Detroit 12.7 when on the flat have no problems, but when I’m the hills n building rpm it sometimes making a blowing huffing sound n puff black smoke, when building rpm. Have this happen to anyone or do anyone knows what cause this
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2 hours ago, fjh said:
Not one worry in the world on that!
Ok thanx, when I saw that I thought I needed to do an overhaul
Cab to trunnion measurement
in Mack Truck Q & A
Posted
What will be the best cab to turn ion measurement for a 14ft tank to be on a truck