Yeah, when I went through all of this waaaaay back in 1996 with my 1995 Z28 Camaro (5.7L) it was definitely noticeable how the bottom end went away with headers and low restriction exhaust. Did good on the top end, but never pulled like the 55 does now. I had a Borla exhaust with an exhaust bypass, I kept it on the mid plate, but always put the complete block plate back in when I went to do my yearly state inspection. I was always surprised how much low-end torque came back with the bypass blocked out. Made the car easier to drive (6 speed manual) for sure. I did a remap on mine too, really didn't notice anything as a result. I would be very surprised if a ECU remap could get you 36 HP, and more importantly where would that HP land on the RPM curve? Getting gains way up high is great, but my problem is that to get to them, you've got to be going warp 10, and the local boys in blue don't take kindly to that. Where the gains are is as important as how much gain there is.
Putting a supercharger in a high performance naturally aspirated engine is not a matter of if you're going to blow it up, it's when. The high compression ratio is roadblock #1
is that i'd gamble that the engine has hypereutectic pistons in it, and they don't withstand detonation very well. Hypereutectic alloys are used because of their low coefficient of expansion, which means less exhaust blowby (can make the cylinders to tighter tolerance) and better emissions as a result -- but they are more fragile. Anyway, usually what happens is that people blow the ring lands off. If you do that in a SB chevy 350, it's a problem but not a big one because there's zillions out there, and there's a ton of aftermarket support. A bit more of a problem with a MB motor. Factory Turbo'ed and supercharged motors have forged pistons, and they can handle detonation with no problems.
So as you can see, I've played with this a bit before, haha. Now I've got a car that runs low 12's completely stock, no mods for me, thanks!
Just noticed you're in Guildford. I was living in West Byfleet and working in Farnborough up until the middle of July.