People are getting more and more into the SxS stuff and people are making some serious power for the size these motors are. I am actually about to fabricate a turbo setup for mine once I get my turbo back from Advanced Thermal Products, where I am having them make an Inconel shield around the hot side of the turbo. I'd like 110-125whp at the wheels to help with the bigger, heavier wheels and tires I am using, my altitude, and just for some more feeling of getting put back into your seat. In reality, it's mainly because I can't leave anything alone.
The short of it, I use my laptop to change timing, fueling, scale in Volumetric Efficiency (VE) more accurately, cam timing, etc. In the case of factory turbo cars, we can bump the boost higher, which gives pretty good increases. Some of tuning a car is making it hit targets, where any OEM tuning will be close enough to handle all the cars off the factory line, which are all a little different. Once you start changing parts, tuning becomes a must. When I put on my turbo, I will be swapping injectors and a MAP sensor, along with changing the VE of the motor. I will have to scale the injectors in, scale VE based on the higher reading MAP sensor, etc.
Here is a video of me tuning one of my own cars last year. This is my track car, which I have added a turbo to and run E85 on.
This was from a few weeks ago. We were trying to actually get a 1,xxx wheel hp dyno with a worn motor, knowing it might go. Compared to this video, we've run 20 more PSI at the track, than what we did here. This shows part of the tuning process. This car was a little different compared to most vehicles I do in that not only is it on an aftermarket ECU, but there was no base map to start with, so I had to build it from scratch.
A few months ago, I went out to tune another SHO owned by the same guy. This SHO was built up for another TV that will air towards the end of the year... Can't share anything more than that, but I will say that we did extremely well on this show, unlike the other show we did on Netflix.
I do a lot of these cars (Subarus), which are a bad choice for making a lot of power out of, but the parts are available to drain money on. 😛 This car was actually put together well and made great power. I actually turned up the boost after tuning it on the dyno, so I probably was just over 700whp.
I am looking forward to getting this back on the dyno again soon to bump up the power a bit. I really like tuning fun track cars.
Sorry, I can post tuning/racing stuff for days. I enjoy the hell out of it and having retired from one job, I look forward to leaving my current full-time job in a couple years to do this full-time. I think the SxS stuff will start being a bigger thing for me as the EPA is making things harder for anything that was once a certified emissions-compliant vehicle.