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and i'll bet he is not using the old poor flowing heads we have. we just need 4 valve heads for at least 80 hp

well, i'll have to look again, i thought i got it from the LDT engine specs as the field expedient way to set the fuel rate, so 14 is even better!! i may remember to look again, i may not, as i am no longer in control of what i remember!

well, i would say 14 psi as 9 psi is stock setting for the LDT. and max torque may be at a lower rpm, probably about 1900, sometimes HP is not what gets the job done.

190 hp is 400 ft lbs at 2500 rpm. if you just turn up the fuel and set the high idle at 2550, how far away do you think you are?? what i am saying is that i think you are already there and reliability is limiting the rpm. put one on a dyno and see. tom

this should be taken as what it really says. it would at max fuel rate continuously. not the way it is driven. it still takes the same amount of fuel to move a given load at a given speed, other inefficiencies being the same.

i am convinced that with just the fuel turned up, a ldt will put out 200 hp. the lds -2 had 14 psi boost while the ldt only had 9. i have had both and cannot tell the differance when a ldt also has 14.

i agree, the 'extra' power comes from more fuel and timing advanced to help keep it cooler. so set your LDT to LDS-2 timing and give it as much fuel as it can handle. must have pyrometer or very real risk of melting pistons. this is just a very old engine design that was never meant to have the...

i fail to see how there is ANY increase in pressure or wear by turning up the fuel. all you are doing is raising the position of the fuel dump bar. you are not increasing the pressure just the duration and only by extremely marginal amount. a LDT can easily be turned up more than it can handle...

actually the govenor IS something you should be adjusting. DOWN!! under the cover on the rear of the IP is the high idle screw, i set mine to run at 2550 rpm full throttle in neutral. i expect to have this engine for another 30 years.

seems to me the question has been answered over and over again. but as heath says there is no real big differance just as there is no big differance in power. the LDT is set at 9 psi boost and the LDS at 14. that takes more fuel, and fuel = power. any good LDT turned up to 14 psi will run as...

if you want more power (HP) just run them at higher rpm since the formula for HP involves rpm and torque. and that is just what the military did since the engine in its most reliable form, low rpm, did not make enough power. hence the higher rpm of the LDS. but it's not gonna last as long before...

different cam, pistons, fuel rate, rocker arms maybe, turbo flow, etc. in reality i have had both and cannot tell the difference between them if the LDT is turned up to the same boost as the LDS. it was never meant to be a high output engine, and it was never meant to turn more than about 2200 rpm.

it's amazing how much crap people believe. ok,maybe the 465 can put out 400-500 hp for 5 or 6 seconds. so what? we need a reliable engine that will run for 100,000 miles minimum. it ain't gonna happen. if you use a different block, different heads, crank, pistons, rods, etc, it is not the same...

i seriously doubt the multifuel would ever make 300 hp. it would take more rpm and we all know that is an issue. there are however several trucks around that have 200 hp at 600+ ftlbs of torque. that gives exceptional performance and ignores most hills. tom

you need to go back and read what i said, then learn how these unique diesel engines work. they are direct injection, but they do not just spray the fuel across the head of the piston like most.

some errors in previous posts. 2 hole injectors replaced the 1 hole. they don't spray onto the top of piston, rather into a chamber in it. oil cooling on ldt just sprays onto the piston. lds sprays into passages in the head of the piston. all considered, i have turned ldt engines up to at least...