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The problem is, the phones accelerometer isn't reliable, sensitive, or consistent enough... I know mine isn't.

Really? The thread is asking the question of what the differences are. We are trying to isolate the ones that matter, from the ones that don't. If you think you have a better way to find out what the hp/lb-ft differences are with each step of the transformation... by all means, enlighten us. I...

To paraphrase Bender "They can kiss my giant metal a55":D

LOL... True. I just can't think of a more exact way to get accurate numbers than nice laser trapped timeslip. But you have a point about the shifting being a variable. Time of acceleration from say 1500rpm to 2600rpm in a single gear would work as well, but getting an accurate number would be...

Are the improvements to the D enough to justify swapping out the C? I know some guys really want the C for the whistle... I could care less. (I'm going to muffle her anyway) Also, the advance in timing from LDT to LDS, combined with tuning the main fuel and droop screw on the LDT to LDS specs...

I'm bumping this in case it catches the eye of someone who has rebuilt both engines and knows the answer. Also, my M35A2 LDT should be coming home in a short while... I will pick this up when I have one in my hands.

I thought they were all 22:1, but there was a small difference in the design of the "Cup" for turbulence creation, and a coating. I'm just trying to isolate the 100ft/lbs, 40hp from LDT-1A to LDS-1A because it is the smallest change for the greatest improvement. I don't think the deuce is...

I'm quite dense sometimes... That final example of the 465 series engine would, of course, be the solution to the problems they were seeing in the earlier models. Stronger rod bolts and a main stud girdle, lightening the rotating assembly and balancing, all the old tricks we use on gas...

Is there a resource you could think of other than just tracking the ones users here have encountered? I'm familiar with #6 cyl block failures in seriously cranked up engines, and remember reading that someone was investigating ARP bolts to beef up the bottom ends. (I assumed that meant...

I'm thinking that particular LDT might have LDS pistons as well. If they put solid pins in, I'm thinking it was because they only used oiled pistons at the same time. It's the same short-block, and this wrist pin swap makes me think even more they were just putting the updated LDS components in...

But the pistons used in the LDS have hollow cavities for the oil channel... I would lay a wager the two offset. The problem would be if you had a "Solid" LDT piston and a solid LDS pin (heavy). An LDS piston and the LDT pin might also cause a problem (Light), but a nicer one to deal with if you...

I'll do my best. Thanks! Parts list as well? Awesome...:beer:

You may be right. But if there is no interference issue the idea of higher ratio intake rockers might be one to consider, even if the LDS turns out to be the same as the LDT. Those wouldn't be bad to knock out in the machine shop. Small chunks of good steel, a fairly simple shape... I have...

I really wondering how many LDS parts made it onto LDT engines after the late 80s. The airflow requirements for the LDT465-1 and -1a are listed as 405cfm, where the LDS465-1 & 1A are listed as 450cfm... Again, LDS465-2 is the monster at 550cfm (Numbers as per TM 2815-210-34-2-1) These engines...

JATONKA M35s NEW NOS LDS PISTON AND LINER KITS LDS pistons and sleeves can be interchanged according to Jatonka... I think we are down to the rockers may be a different ratio, the pump gets cranked up to use all that new air, and the oiled pistons are there to keep it alive. The air filter...

Diagram found, but other than the quote from earlier in the thread, I cannot verify that. TM 9-2815-210-34 has a picture.. Fig 18... but the exact ratio isn't listed. It is, however, the only difference that makes sense, considering the exhaust is the same old LDT part, and the LDS is getting...

I'm looking for the part diagrams as we speak.

Wait a minute... TM-9-2815-210-34-2-1 Say the differences are: Piston... oiled vs unoiled Intake Rocker arms of increased lift ratio on the LDS LDT&LDS -1 timed at 20deg BTDC, LDS-2 @ 22deg The injectors themselves are interchangeable, as are the IPs, blocks, heads, lions, tigers, and...

Or, if my reading is correct, I would need to install LDS pistons, intake rockers, and adjust the fuel pressure to match... The turbos, fuel pumps, timing, heads, exhaust, cams, and injectors were all identical, or interchangeable, between LDT and LDS engines... and I can safely turn an LDT into...

Point taken. LDS it is.... as long as it doesn't add $1000, anyway. :driver: I'll try to find a PTO and winch later... or maybe just a hydraulic pump to put on the PTO to pipe for ports up front and in back to run whatever I want. (winch, hoist, dump-ram, pump, generator, log splitter... oh...