Originally Posted by DeusMexMachina

Just ordered the Racechip RS tuning box seen here: Performance chips – Chip tuning by RaceChip for LR Discovery v (l462) 3.0 SC (250KW) | RaceChip

The draw is the extra torque and fuel efficiency, which should be nice since we will start trailer camping this spring. The extra hp is a nice bonus. The reviews I found confirmed the claimed hp/torque gains on their products but I haven't seen much on the mpg improvement, I will report back once I install the product.

I chose Racechip since I didn't find any other tuning box options for the Si6 (lots of tuning options for the TD6 though). I didn't consider pedal tuners, though there are multiple options for the Si6. The product seems easy enough to install and remove as needed since it only connects to the sensors, no flashing like the Velocity AP option for the AJ126. I was tempted by the GTS Black but I think I will be happy with the RS, I also didn't buy the optional App. I will probably just stick with the best setting for me once I find it.

Originally Posted by DeusMexMachina

These are the manuals I received from their customer support before submitting my order. I think the reason they list this as a difficult install is that the manifold absolute pressor sensor is at a difficult angle close to the cowl. It's going to take some dexterity or unscrewing the sensor.

Originally Posted by DeusMexMachina

...oof, that was a rough install. Getting the clip off the manifold absolute pressure sensor was tough. It's in a difficult angle against the cowl. Luckily I have just enough wrist dexterity and gritty digits that I was able to get it off. Blood was spilled as I blindly jammed my fingernail into the clip to get the needed leverage to unhinge it. If your blood isn't on the engine block is it really your Disco?

I drove my usual route this morning and there is a noticeable increase in hp/torque. I left the Racechip in its factory setting of 4 but didn't push it hard since I want to get mpg figures. There was about a 0.5mpg drop in both of my "trips" which I will track to see if it is sustained. This morning was the first time we've been in the low 30's in Seattle this winter so I idled to get the heat up for the kids and I turned on the seat and steering wheel heat, so that probably had an impact. I will keep cycling through the different settings for a few days each to get data and feel for them.
Bonus, after dropping off the kids I lined up with a Raptor at a red light on a road that merges to a single lane, I had no problem getting a jump on it. I clearly heard the Raptor's wheels spinning on the cold asphalt.

Originally Posted by DeusMexMachina

...oof, that was a rough install. Getting the clip off the manifold absolute pressure sensor was tough. It's in a difficult angle against the cowl. Luckily I have just enough wrist dexterity and gritty digits that I was able to get it off. Blood was spilled as I blindly jammed my fingernail into the clip to get the needed leverage to unhinge it. If your blood isn't on the engine block is it really your Disco?

I drove my usual route this morning and there is a noticeable increase in hp/torque. I left the Racechip in its factory setting of 4 but didn't push it hard since I want to get mpg figures. There was about a 0.5mpg drop in both of my "trips" which I will track to see if it is sustained. This morning was the first time we've been in the low 30's in Seattle this winter so I idled to get the heat up for the kids and I turned on the seat and steering wheel heat, so that probably had an impact. I will keep cycling through the different settings for a few days each to get data and feel for them.
Bonus, after dropping off the kids I lined up with a Raptor at a red light on a road that merges to a single lane, I had no problem getting a jump on it. I clearly heard the Raptor's wheels spinning on the cold asphalt.