Wait what? Let me explain. So I was looking at the old supercharger pulley and took some measurements and it is nearly same size as the pulley I put on. (Little over 57.5-57.7mm depending on where I measure it). I know this is smaller than stock so this means one of the previous owners had a stage 2 tune on this car. Also when I went to stage 1 I noticed a major hit in my MPG as my car was likely running too lean as the supercharge was spinning faster that stock and blowing the air to fuel ratio out of whack. I think the previous owner likely flashed it back to stock as the stock tune would be able adjust for the different boost from the supercharger, it just the stage 1 was not designed for the pulley to be there so that likely where the problem is. I'm going to give the stage 2 tune a few tank fulls to see if now my MPG comes back up.
That all said, I did look over my install pictures and the car itself and sadly I can't find any other major upgrades that I should be aware. I was really hoping to find the crank pulley and cooling upgraded, but it wasn't. The real question is what tune was on this car before? I've emailed all the major tuner and gave them my VIN to see I can find who it was. Kind of a shot in the dark if any of them reply.
As for the EPL Stage 2 single pulley tune, it certainly has a lot more low in torque and generally more power along the full range. It is simply stupid easy to break loose my all season tires on a slightly wet road with traction control set to off. I'm ditching these tires went spring comes as I'm getting winter tires install this weekend and hope to run summer tires next post winter. As for the tune I'm happy with it. I've very interested to see if my MPG improve now that everything is back in sync. Only time will tell...
I couldn't pass on a Black Friday sale with EPL so I decided it was time to upgrade to Stage 2. There are many videos and guides out there, so it's kind of hard to screw it up. It took me about 4-5 hours to complete, but I was going super slow to make sure I didn't break anything, and or lose any bolts. The most time consuming part is just getting the car into "Service Position". After that point it was about 5mins to get the supercharger pulley removed, using a proper pulley puller tool. I had the new pulley heated in my oven for about a hour at 400F but sadly that was not enough as the pulley would not go on. So I did 500F for 20mins and the pulley went on like a glove. I used a mini blower I have for blowing off water from my car and 10mins later it was cool enough to the touch to install the belt. From there put everything back in reverse order. And Another few mins to flash the EPL Stage 2 tune and I was on my way for my test drive.
About 10 mins into my drive I heard a horrible flapping slapping noise. Crap, I was so excited to drive I didn't bring any tool and immediately thought my belt snapped. I pulled over to take a look and found no issues... the belt was fine. So I continued on my drive heading back home and the sound did it again.... At that point I remember one thing I forgot to snap back in place and it was the garage door homelink transmitter between the grill and heat exchanger. It was basically flapping in the wind at certain speeds. Luckily all was ok and it still functions... but it sure did scare the crap out of me.
I'll give it a week to allow everything to adapt, before I push it. I hope to give it a review in the coming weeks.