300 whp was fun but like I mentioned in Part 1, there were some issues that I was not happy with. After spending countless hours at IWSTI (where I do most of my research about my car), I decided 300whp just wasn’t enough. I wanted to play with the big boys… I wanetd more power… I wanted a bigger turbo. This is where TopSpeed comes in.
I called Tray up at TopSpeed and told him I wanted more power and what he recommends. His question was simple, how much power do I want and I answered 400whp. The FP20g wouldn’t get me there, green would be closer, but his recommendation for my needs and budget was the FPRed. He listed a whole bunch of things that need to be changed in the car for this turbo, told me the price, and I gave him the OK to proceed with the project.
The project got to a rocky start because FP was getting a ton of orders and it took a few extra weeks to get my turbo. While I was waiting for my car to be ready, I started reading about this “Methanol” thing. I called Tray to ask him what this was all about and he said that for 500 bucks I could get 50 or more hp. I was very upset when he told me this because I was already over my budget but how could I not get this… this was probably the best dollar to horse power mod I could get so I told him to order it for me. Eventually TopSpeed got all the parts in and installed them. The list of parts was:
- Perrin FMIC
- FP Red
- Perrin Big MAF
- 860 injectors
- fuel pump
- Tial BOV
- SMC Meth kit
Doug tuned my car and when everything was done, I went to pick up my car. They greeted me with the numbers I was looking forward to hearing: 455whp/435wtq. Two thumbs up for TopSpeed and Doug for such good work on my car. I was very happy with these numbers and the first thing I wanted to do was go out and try it out. Below is the dyno from that day:
I had never been in a 400+ hp car before so I didn’t know what to expect. I drove to the highway on the way home, looked around to make sure it was a safe straight to give the car a quick test and I floored it. WOAH! I could not believe how fast the car was… it was scary fast… almost too fast (well for the first couple times :p). I was so excited. Every morning I couldn’t wait to get in my car and drive around.
Eventually I started getting lazy. Because I was always getting on the gas, I was using up my meth pretty quick. I had a 5 gallon container that I would go fill up at TopSpeed every so often (about 1 hour away). I started getting lazy in the sense I didn’t want to go fast because I would use up the meth so I would have to refill the reservoir in the car and eventually drive back up to TopSpeed. It’s a silly reason really, but that’s what happened.
Looking back what would I have done differently. I think I would have gone with an external wastegate… more for the sound but I guess it makes tuning a bit easier with boost or was it that you can hold boost better with it… or both? I think I would have also gone with a rotated setup, probably a GT35r and no meth. I have no issues with the red other than now if I want more power I need to go rotated since I don’t believe I can fit any bigger turbo in the stock location. I would have also gotten a trunk meth tank (bigger) so I wouldn’t have to refill so often (I could do that now for not much more money).
Actually, knowing what I know now, I wouldn’t buy an FP product anymore. Why? Read this. If you do read it, it’s not because of a turbo or two going bad (things happen), it’s because of what the FP guy says about the Subaru community. I would think people trying to sell their products should know it’s a bad business practice to insult your possible customers.
One thought on “05 WRX STi – Road to 450whp Part 2 (300whp to 450whp)”