LM002 RHD Rolling restoration.. will be updated regularly

None available here , I think there's only 2 rolling dynos in the whole of Jakarta.

 

We've been offering him a free sample for 2 months and he wasn't interested lol

 

Apart from the gearbox and transfer box, the diffs on the LM are huge, the power absorbed by them must be 3 times that of a 530 BMW.
I took a couple of friends for a ride in mine at the weekend, and they confirmed it has to be the maddest form of transport going!!!!

 

It would be good to get some other LMs on the dyno to see the results

 

I agree. The entire drivetrain is hardly designed for fuel efficiency.

The entire chassis is very industrial. It is why I always correct people when they call it an SUV. It is not an SUV, it is a well upholstered military vehicle.

 

With the running costs of a weapons system

 

Pretty much.

 

Something weird about that second page of the specification sheet

It proudly boasts 455 hp at 7,000 rpm but the maximum speed in each gear is at 6,500rpm, I'm thinking on a road test 6,500rpm was all the engine can pull when installed in the LM.

Has anyone seen higher than 6,500rpm ?

6,500rpm was what the LM also pulled to on the dyno before the engine strangled itself from that crazy air filter and intake system

 

Ok , these factory power figures (455hp at 7,000rpm) are BOGUS

Real horsepower can be calculated from 1/4 mile elapsed time , terminal speed and vehicle weight.

Plug 17.31 seconds , 79.8 mph terminal speed and vehicle weight of 5,800 lbs into the calculator below and that shows rear wheel hp results of 221 hp to 236 hp which means a crank hp of around 320 to 350hp allowing for a lot of losses (40%)

ET-MPH-HP Calculator

Lambo's telling lies on the LM power output

Now Taffy's dyno figures are starting to make sense

 

I think your guess is pretty good but a carb truck is considerably more powerful. I doubt the FI engine makes 400 but the carb motor is probably not far off. They had a lot more cam and a clients truck I used to service could easily chirp the tires in 4th gear to the amazement of many passengers.

 

Carb trucks pull 7000 easy. No point in the FI truck with the cams they have.

 

Taffy , you need to weigh the 'truck' on a weigh bridge

 

So why are you down 125 rwhp on a healthy sounding engine now ?

I don't think the power is anywhere near that.

I didn't realize the cams were different , that would explain a lot

Did they put tractor cams in ?

We also found a huge port mismatch between the intake manifold runners and the the intake port on the heads which we 'adjusted'

 

Brian , how different is the air filter and intake ducting arrangement with the carb and FI engines ?

 

The second one is the QV not the LM002, the LM002 had always less power than the QV.
Also you have to distinguish between the FI LM002 and the carbed LM002, on the carbed version you have to improve the Air filter system, it's much to restrictive.
On a friends LM002 this was done, a difference like day and night.

 

Carb motor has 70 degrees of overlap and 300 degree intake duration and 280 degree exhaust
Injected motor has 37 degrees of overlap with 280 degrees intake and 260 degrees exhaust.

Don't know about compression or ignition advance but I suspect those are different as well. Would follow as the FI motor was designed overall to address smog regs.

The carb truck has the same air filter and particle separators but with better plumbing to the intake box.

I would have to see dyno runs to believe the basic air filter system is causing restriction. The FI intake duct is a different matter though. I would not be a bit surprised if the meager throttle bodies on the FI motor flowed considerably less than the carb arrangement. Same flow was just not needed with the cams and I suspect the throttle bodies were an off the shelf item and compromises may have been made to get a ready made cheap part.

No question a lot more power is available from the FI engine.


If I remember correctly the gearing is different too. I seem to recall the ratio in the transfer case was changed.


Drive them back to back sometime. I have and it is a big difference.

 

+ 100%

I too have noticed large differences between FI and carbed trucks, feeling the carbed trucks had much more throttle response and more power. I used to test drive them with a stopwatch back when I was shopping for one to buy, measuring time elapsed from 2K rpm to 6K rpm in third gear, and the carbed trucks were always faster and sounded better. I know fuelies have there advantages too, but to a do-it-yourselfer, the carbed truck was the choice! I have dyno sheets for a 1988 carbed truck that I will dig out and post.