max HP out of a 465 multi fuel?

[tm america]

i believe mine is around 200hp i have it turned up i'm running around 27psi boost at 2600 it gets around 15 at 1500 .its way faster than stock i have been running it like that for over 5yrs no problems i dont hold on the gov under load other than that i drive it like i stole it everyengine is diffferent just cuz i get away with it doesnt mean you will . i also want to put a cummins in my truck and am trying to make an excuse to do it but i just cant seem to kill this slow little multi

 

[phil2968]

i believe mine is around 200hp i have it turned up i'm running around 27psi boost at 2600 it gets around 15 at 1500 .its way faster than stock i have been running it like that for over 5yrs no problems



Tm, what kind of heat are you making at the turbo? Pre or post turbo heat?

 

[m16ty]

Seems alot of people think if you turn up the fuel their truck will go faster. Your truck will not go any faster by turning up the fuel. Only way to get more speed is to change the gearing or mess with the governor (not recommended).

Turning up the fuel will help when pulling hills especially when loaded. IMO turning up the fuel isn't what gets these engines, it's RPM. I think you'll be ok by turning up the fuel within reason, installing a pyro so you can keep track of EGT, and keeping the RPM below redline.

 

[stumps]

HEY STUMPS. 30,000 MILES? i THOUGHT THAT THEY GO A GOOD 230,000 OR MORE!

I think they should be able to do 200K+, .... but what I think has little to do with how they actually perform.

The government was expecting these to be used in VN line haul duty, which had them running more than 2000 mile per month mostly on unimproved roads, and they were breaking at 10,000 to 20,000 miles.

That is what they got by running them against the governor, with whatever level of PM the trucks were getting.

Are we asking less hard service when we crank up the fuel and run them against the governor down the highway? Less bumps and thumps, but a lot
more full power operation.

-Chuck

 

[m16ty]

i believe mine is around 200hp

How do you know this? Have you had it on a dyno?

 

[Floridianson]

I think these motors will take full fuel if driven with you head.
The motors are turned back on the fuel I believe cause they were given to steering wheel holders not truck drivers.
They come apart cause not all are mechanics. When your oil pressure is not where it should be that means some thing is loose. Now run it hard and it will come apart.
I have had a class A since the 80's owned a few big rigs and driven 53's across country. It's all in the foot and the head.
I would place my sending units one inch from the head to get a true reading of the cyl./ pistons.

 

[tm america]

on my truck it actually made it faster i wasnt getting enough fuel to get it up to gov speed .it would only rev to 2400-2450 before now it will hit 2600 no problem. but you are correct i meant quicker not faster there is a difference .i gained a couple mph with the extra rpm. like i said every engine is different some are underfueled when they come out of service some are way over just depends on who the last one to work on it was

 

[stumps]

The Turbo on these trucks doesn't have a bypass to control the boost pressure?

"G"

These are very basic turbos. The exhaust drives the turbine, and the compressor is plumbed directly to the intake manifold. There is no waste gate or bypass controls whatsoever.

The fuel control, and the governor are the only things that keep the turbo from making excessive boost.

Remember the turbo was put on these engines to give them enough air so they would stop their heavy sooting. It was a pollution control idea more than an increased power idea.

-Chuck

 

[tm america]

200hp is an estimate from the difference in boost vs stock boost at the same rpm .i have a coworker that is an engine builder and we were doing the math together from what he sees on other turbo engines on the dyno .i have no pyro on my truck sorry

 

[velociT]

TM I think I need to use whatever oil you're using...

 

[tm america]

well .just like with anything driver is durabilty. you put a 30yr vet truck driver in a race car and he wont brake it .but you put a 16yr old kid in a semi and he will kill the clutch in less than 10000miles when the trucker will make it last a million miles

 

[Heavy Hooker]

I have rebuilt or overhauled many of the multifuel engines while running an engine rebuild shop for the Military. The Multifuel engine is a well built engine internally but suffers from 1950's diesel technology. The latest MF engine, the 1D uses coated piston tops and lower compression bowls. We found that the lower compression made starting in the Arctic alot harder so ether start systems were installed. I converted Many of the 1D engines back to 1C engines by changing the pistons. As for exhaust temps, my dyno has the probe in the down pipe post turbo. The temp readings change by as much as 200 degrees depending on were the probe is post turbo so if you start compairing post turbo temps be sure the probes are in the same spot. I have run the LDT model at full load for hours on the dyno with no problems. The new head gaskets are a must if someone wants a MF to hold up under extended loads. I always reconnect the fuel density comensator and recalibrate the injection pump on a rebuild as our arctic fuels have very low BTU per pound ratings and these motors need more fuel to get over the mountains. 50% of all our catrostofic failures were caused by extended high RPMs and 50% by cold start oil starvation. The quality of rebuilds also very tremendisly from person to person or Depot to Depot, so it is a crap shoot to when, how and why these engines fail.

 

[dittle]

So how many turns are you guys is saying is safe to turn up (if you don't have a pryo)?

 

[saddamsnightmare]

December 27th, 2009.

Trudge:

IMHO I would suggest staying within the design limits of the engine, as the stock LD465 NA ran about 130 and the Turbo'd versions 180 HP, and it is pretty doubtfull that the engine could stand 200HP for long. Besides which, the defining limits are what the tranny, transfer and axles could stand. These were designed as slow speed off road trucks, and when they were designed, turnpike speeds were 45 MPH, so the original top speed without overdrive was.....45MPH.
If you want a fast truck, buy a 900 series or better yet a civillian truck, as they are better suited to modern road speeds, about all a deuce can outrun would be a three legged turtle and only if the turtle were really tired.... My Unimog (S404.114 Swiss- 1963 MB) has a slightly higher short term top end of ....60MPH, but if I want to keep the tranny in it happy 40-42 (60KM/PH) is about it. These machines will sometimes climb trees, they just won't do it very fast. It's the nature of the beasts, but they'll pull over just about anything you need to move...s-l-o-w-l-y.

Enjoy the truck, if the engine's maintained, the rig might just out last you.

Cheers,

Kyle F. McGrogan

NB: I'd love to see a stock deuce with a stock LD-465 and 9:00 X 20's (all 10 on the road- not singled, do 65 MPH all day long. I've heard the claims many times, just never have seen it actually be done without throwing a rod or worse. These trucks will operate in deep mud, but I think it's something more then mud we run into now and then.....
Cheers,

Kyle F. McGrogan

 

[Stretch44875]

So how many turns are you guys is saying is safe to turn up (if you don't have a pryo)?

It's impossible to tell. Trucks from the govt. come turn up, down, and every variable inbetween. It's rare 2 deuces will run the same. You could set it by boost to stock settings, as mentioned in other threads. Safest way to set it is by pyro.

Dennis

 

[gimpyrobb]

Lots of mis-information in this thread. You guys need to be carefull of what you believe that is posted here.

 

[kipman]

The man with the broken crank does know of what he speaks.

 

[roscoe]

[media]http://www.youtube.com/watch?v=nXW5zu57ESI[/media]


Sorry, just had to post this.


And yes I know its not the original.

 

[Trudge]

yeah i want reliability but i would just like to climb the hills here in the Adirondacks a little better!

 

[tm america]

all deuces were made to be able to do 56 from the factory .gas motors had dirrect drive for high gear and deisels had od to compesate for the lack of rpm . there is no way to say how many turns is safe to go since every engine is set different as a starting point .best to use a turbo gage and pyro to set it to a max safe hp.i wouldnt run egt over 1150 under load and that probably comes out to around 20psi or lessmy motor is a ldt465-1d and what i do to my truck is just that i would be alot more conservitve if i were turning up your truck for you