I was wondering what everyone else is getting with there LLY 4500 trucks. I dont know exactly how to figure it on my truck or how much it even holds. I also have a predator on the 45 hp tow tune.

On a side note i know it will only go somewhere between 250-300 miles on a tank running 70-75 on the interstate. I was wondering for my trip to texas in the next week or so if i could take a plastic fuel container (55gal) and put it up on the bed and strap it in. Fill it up at the truck stops and then not have to pull in a stop just pump it out when i need it at like arest area or something like it. Is this illegal or will i be fine doing this?

If the tank is not rated for fuel its illegal.Tractor supply sells transfer tanks. animal4500 rvtransporter

If the tank is not rated for fuel its illegal.Tractor supply sells transfer tanks. animal4500 rvtransporter

i have a legal tank that was on a service truck of mine. Where is the best place to tap into the fuel fill line? I notice there is a smaller line that is likely a over flow? Can i put a T on it and run the line from the transfer pump to it?

I was wondering what everyone else is getting with there LLY 4500 trucks.



Hi latemodelracer2,

I get about 10 mpg empty 70-75 mph on the freeway to about 7-8.5 towing the 40' 5'er.

TechProf

Thanks Tech


Is that stock programing? Im pulling a 24' trailer to texasa this week with around 8500-10000 lbs in it so i figure ill be close to your 7.5-8 Im not sure if the predator is helping my mileage or not. I guess ill find out.

I get about 9-10 miles when towing, 13-14 miles empty. If I didn't have a lead foot, I might get better MPG. John

Thanks Tech


Is that stock programing? Im pulling a 24' trailer to texasa this week with around 8500-10000 lbs in it so i figure ill be close to your 7.5-8 Im not sure if the predator is helping my mileage or not. I guess ill find out.


Hi Latemod,

That is with the programmer. Pacific's.

Towing I am using level 1 "tow mode", empty - level 3. We have been on a long vacation and I have been following the mileage close every tank. The worst mileage is on the freeway at about 70ish. The best, up the 101 coast highway..35-55 mph. Today I got the worst 6.9. Freeway, slight headwind.

Tech

Well I will see what i get when i head out. I usually cruise @74-75 so i dunno what to expect. ALso I watched my pyro today just crusising. It was riding at 80o-900 @ 70-75 mph is that good? ALso when i hook my trailer up how much will the temp increase because of the weight.

10.5mpg around town, 5500 4x4 11' steel flatbed...5.13 gearing, 10,000 feet above sea level.

4400 miles on the truck, I never had it on the highway.

Well I will see what i get when i head out. I usually cruise @74-75 so i dunno what to expect. ALso I watched my pyro today just crusising. It was riding at 80o-900 @ 70-75 mph is that good? ALso when i hook my trailer up how much will the temp increase because of the weight.

Hi Latemodelracer,

800-900 is good but it depends where you put your probe. Is is on the exhaust manifold - pre turbo? You really notice the difference on the temps when you are pulling a grade up hill. Oh, generally, a couple hundred degree higher. I have been running about 1100 @ 60 and about 1200 at 70.


Tech

My sender is mounted post turbo due to a past problem with a pre setup. Ill have my predator with me so if i have to i will load the stock program in. It seems there a lot of people running high egts on the 40 hp LLY predator.

It can be as much as about 300 degrees +- post turbo temps. There is quite a lot if you do a search about that. I remember reading something that was posted about comparing two different temps with a pre/post temp. You definately want to know that difference. I know that if I am at 5000 feet or higher elevation, I can quickly go to 1400...which is too high.

TechProf

Before I loaded the truck I was getting 15.5 - 16.5 in town. but after loading it down I now get 9.8 - 11. I have yet to pull my trailer I say I will loose another 1 - 3 mpg.

It can be as much as about 300 degrees +- post turbo temps. There is quite a lot if you do a search about that. I remember reading something that was posted about comparing two different temps with a pre/post temp. You definately want to know that difference. I know that if I am at 5000 feet or higher elevation, I can quickly go to 1400...which is too high.

TechProf


I searched but didnt find a direct comparison just people saying pre was better but no reason why. All i really want to know is what is the most post trubo i want to go. I run this setup on my f350 and have on the last 4 i have owned with good results but just need to know what the limits are.

I think the temps would be higher post than pre. Wouldn't the gases generate heat passing thru the turbo? Just my 2 cents worth. John

2005/ allison. I get 14 running over Donner.with cruise set at 65 empty. That is with utility boxes full of tools & 99 gal trans tank. 144 gal total. Stock, no chip or any other mods. Will be pulling a 36' 5th wheel shortly. Expect about 10.:)