Cody, the key to top speed isn't just pure horsepower, although Matt's probably got about 100hp on you. The key is getting a good run off the corner leading to the straight.
At RFR, with the new back-stretch, turn 7 is the key corner to getting quick lap times. Unfortunately, T7 is also the most difficult corner on the course... semi-blind, off camber, and the setup into it is directly effected by the difficult T5 and T6 (the turn around at the north end of the course). I'm not sure if your instructor showed you the line, but it's a little counter-intuitive to come off T6 and get into T7. But if you do it right, you should be able to run flat out from the middle of T7 all the way to the bumpy braking zone for T12.
Turn 15 is the last turn before the front straight. MattR was telling me it's a bit slippery since the resurfacing, but before that, you could carry an amazing amount of speed through there due to the banking/uphill nature of the corner. The problem is, if you miss the apex at those speeds, you tend to get flung off into the dirt on the exit, or spin (ask Nick about that!
) Again, that's another important corner that takes practice and experience to get right, but when you do, you've got a good 5-10mph advantage onto a long straight, which puts you into the 120 mph range into the esses.
When I was running my car before the 6MT on the stock turbo (dyno'd at 198awhp, very similar to your car) I was getting up to around 110-120 on both the front and the back straights, and Dean (who's car was just about the same as mine,
but with stock boost) was running away from me like it was nothing. All a matter of line, experience, and commitment. Hopefully Dean will be around at the next event to give you some instruction, he knows RFR pretty well now, and is a good instructor.