LDS VS LDT and the real differences

[jimk]

Top (left to right)- exterior C turbo (whistler), exterior D turbo, D compressor wheel. C compressor wheel (whistler).

Second row-photo of LDS465 turbo w/wastegate and D turbo, from cranetrucks MV Mag article.

 

[jimk]

In the previous post- Note the D turbo has a wide flat exhaust housing. The C has a scroll (snail) like exhaust housing.

 

[Flyingvan911]

I like those pics, jimk. Those are the best I've seen for showing the difference between the C and D turbos. My deuce (another EUC hostage) has the LDS. I am thinking about getting a 5 ton ait filter housing for it so I can use the LDS air filter. I can mount it on the right fender and through the current intake hole in the side panel. Anyone know where to get a 5 ton filter case and how much they are?

 

[jasonn]

Funny you should ask I just pulled one off of this five ton make me an offer and it's yours

 

[Recht71]

I had a LDT in my deuce W/aux gear box behind the Hi/Lo transfer. Fuel turned up ran great 2200at 60mph plenty of pedal left . I put my M-37 behind it not enough power on the big end as I thought. I put a LDS in pulls it great just went to Gettysburg over the hill on the P.A turnpike . I don't think you can fully appreciate the LDS,s power with out either bigger tires, or an AUX or a gears set. The LDS has single hole injectors and a diffrent injector pump. has 425 ft/lbs of torque compared to 300 ft /lbs LDT. Fuel Consumption on the LDS 80lb/hr the LDT61-64lb/hr .These spec's came from TM 9-2815-210-34-2-1 .We put a set of LDS injectors in the WILDTHING guntruck which has a LDT in it, not much change even with the pump turned up. Just my input Till later Randy

 

[Stretch44875]

I've noticed Gimp's LDS in the wrecker had a different sound, would guess because of cam differences.
Then again, his LDS dropside sounds pretty close to a standard D LDT.

 

[SasquatchSanta]

I had a LDT in my deuce W/aux gear box behind the Hi/Lo transfer. Fuel turned up ran great 2200at 60mph plenty of pedal left . I put my M-37 behind it not enough power on the big end as I thought. I put a LDS in pulls it great just went to Gettysburg over the hill on the P.A turnpike . I don't think you can fully appreciate the LDS,s power with out either bigger tires, or an AUX or a gears set. The LDS has single hole injectors and a diffrent injector pump. has 425 ft/lbs of torque compared to 300 ft /lbs LDT. Fuel Consumption on the LDS 80lb/hr the LDT61-64lb/hr .These spec's came from TM 9-2815-210-34-2-1 .We put a set of LDS injectors in the WILDTHING guntruck which has a LDT in it, not much change even with the pump turned up. Just my input Till later Randy

Good post --- Thanks for the input Randy.

I agree with you assessment on the LDS's power. I believe mine would pull Mt. Everest in 5th gear @ 2,000 RPM with 395/85 rubber. I love the way it sounds.

I'd like to know more about the aux gear box.

 

[Billy Bobbed]

on the aux.gear box.

 

[Recht71]

Bill you might want to bring that truck to The HOWARD COUNTY VETERANS Reuion South of KOKOMO In, in Sept.

 

[gimpyrobb]

Just so you know what you are getting into, the 5ton air filter system is not "bolt on" for a deuce. Lots of modification to make it work.

 

[midcounty]

I am by no means a diesel mechanic, but have had my fair share of experience with high performance gas powered engines. It seems obvious that the LDS is getting more intake air in to the combustion chamber some how. My LDS has a C turbo, and runs great. So I am thinking the turbo is not the difference. With boost pressure not being the difference, it has to be in the cylinder head or cam. Anyone ever found cam specs anywhere, or had one of each cam that could be set up and measured? Has anyone ever cc'ed the head ports or measured the valves? The piston ring idea, in my opinion, would not increase any power. It would seem to me that was done to help the engine live longer with the additional power.

 

[Flyingvan911]

Just so you know what you are getting into, the 5ton air filter system is not "bolt on" for a deuce. Lots of modification to make it work.

Thanks for the heads up. I figured there would be some type of suprise involved. I'm not in a big hurry to install the 5 ton filter so I'll have some time to check things out.

 

[gimpyrobb]

The biggest pain is the duct from the housing to the turbo. None of it will work. I will have one on my truck sometime, but right now it needs other things.

 

[jasonn]

So are we really thinking this injector on the lds does more than the one on the ldt I looked them over today and they are defintly different part #'s guess it's time to pull them off and send them to the local diesel performance shop for testing let's find out. I know sone one was already going to check the injectors please let us know the results on that. And then we will move to things like cam and head work kinda doubt we will find any thing different in the heads because both the exhaust and intake manifolds are the same part # so with out that changed the head work wouldn't do much!

 

[Chief_919]

I just looked at a frankentruck today- LDS engine according to the data plate on the block, with a LDT C trubo and a passenger side starter. It was a truck that started its life as a multifuel from the size of teh guage panel, but had a straight M35 REO date plate taht somebody had scratched "A2" onto. Owner was proud of his REO, and was dissapoinmted when I pointed out it wasn't one.

Are the LDS engine with the LDT trubos and passenger side turbos a common modification, and how much more power does the LDS deliver with a C turbo? Can the starter be swapped to either side?

 

[Recht71]

I went to my shop today to look at my engine manual. TM9-2815-210-34p It's for LD,LDT, LDS .Very detailed to rebuild engines. The LD,LDT ,LDS all have the same Camshaft Fed. stock #2815 808 6978. There are some things different between the LDT and the LDS the injectors and injection pump are the main different. Quite a few other small things. I had talked to Bob who rebuilds engines at Memphis Truck he said what gives The LDS the HP is the Injectors and Injector pump. Thats what I have found out, I can say the LDS is Bad to the bone. I have a C turbo on my engine ,it did come with the wastgate turbo I like the whistler. Till Later Randy

 

[doghead]

Really, the TM has all the info? Hmm, who da thunk it...

 

[Recht71]

It has every part #'s of nuts , bolts , gaskets , bearings ,heads ,crank,rods and so on. The other TM on my other post on Spec's is detailed one also

 

[gimpyrobb]

It has every part #'s of nuts , bolts , gaskets , bearings ,heads ,crank,rods and so on. The other TM on my other post on Spec's is detailed one also

I guess that seals the deal. I was not sure it would work, but now I will pull a crank and bearings out of one of my LD motors and stuff them in the LDS that snapped its crank!

Dr. Evil laugh: MOOOOWWWAAAAHAHAHA!

 

[m16ty]

I'm still not buying the whole IP/injector deal on the LDS. I know they're different but can they really make that much more power? You can melt down a LDT with the factory fuel pump and injectors. If the LDS IP and injectors deliver that much more fuel, what keeps the LDS from melting down?

I'm begging someone to prove me wrong on this. It's just with my knowlege of the LDT and diesels in general, I don't see it. Am I missing something?