Yep LS swap would gain a lot of improvements! And you can find 4.8L’s with plenty of life left in them for 500.00 lol.

 

I will call them tomorrow and talk with them, but I seriously doubt there would be significant improvements. I have the software to tune both all the GM LS serious vehicles, their diesels, as well as the MEFI controlled GM's (boats, crate motors). Most GM cars with the LS and Vortec serious come with a serious amount of torque management that limits engine torque in low gear, but I doubt LR implemented that as the 4.6 really doesn't have enough torque to stress the drivetrain to breaking point. GM vehicles have a power enrichment mode where at WOT they go from closed loop fueling using 02's to open loop fueling using MAF readings to increase the AFR from stoich (14.7) to something closer to 11.5-12:1 ( around 13:1 is ideal for power), however based on observing the LR 02 sensor voltages LR does not seem to do that, it appears they keep the LR engine in closed loop as I can see the 02 sensors still cycling (towing vehicle on long mountain climb at WOT). Their might be 2-3% to gain from PE. The only other increase might be from a change in ignition timing, but again I doubt there is much there, and even then it would definitely require premium fuel.

Now maybe with a hot cam, porting, headers, and a different intake? Maybe another 10-20 hp, but even there I think the stock LR stuff was actually pretty good for the time. There are guys that hotrod the TVR version (5.0 liter), but even there the gains are limited. These engines are not like the V-8's from the 60's or 70's that were choked by restrictive exhaust manifolds, mild cams, and less than optimal intake manifolds. The days of getting 150 hp with some bolt ons and tuning is over.

 

Great info here, but take a look at the Exhaust manifolds vs the gasket and ports on the cylinder head. Mine were restrictive by mm’s to the gasket, and very uneven. I have a Kent H180 Cam, and I can tell you that the porting of the Exhaust manifolds, and Heads made a significant difference. I wouldn’t do headers, but porting those manifolds made a difference even my wife admitted to.

You certainly know more than I do, and you are probably right that without an upgraded cam the porting and remapping May do very little, but with both I think it could be more significant hence my interest.

 

Can you run a 0-60 test and post results? I would be interested to see how much difference it made.

 

Living in Chicago, I haven’t hit 60 in months! And unfortunately some A hole just stole my Ultragauge, but I can try sometime for you.

It does have more get-up and go, but passing on the highway is the most dramatic difference.

 

ECU flashing... would be nice if the ECU could be also modified to display on the dash the gear the transmission is running; and to chime once when coolant gets to 215F, twice when reaches 220F, 3 times at 225F... plus other goodies you can come up with... Any programming hacker around ?
I added a led indicator telling when TCC is disengaged and a coolant thermometer with selectable alarm point.

 

Even 0-30 would provide a reference, then I could compare it to my stock truck (and others stock trucks). Any smartphone gps app should be able to do an accurate 0-x speed test. I know the torque app does and my GPS test app does.

Thanks

Tim

 

that would be the transmission ECU - and very few software systems even attempt that even on the major GM platforms And those are embedded software in the instrument clusters believe it or not - I saw once where someone was doing programming on Corvettes for those but almost no one else ever even considers modifying those.

 

I’ll try.

 

flashing the ECU is equivalent to...



IMO