Well, I mean this to be helpful, so Aussiedude, don't take it the wrong way...you WILL not see much of a difference at 8K or 20K for that matter....on any car that I know of...if your more experienced drivers are coming off that last turn at speed, then they are going to be faster on the straight...you have to be ***** to the wall coming on to that straight, living on the edge to specific...coming off the straight again, again pushing it to the max, to the edge keeping rpms up...with a tune and pulley for accelleration, you should see 6200 rpms...but I would say you need more track time for sure, lower your pressure to 30-32lbs....and give her hell, drive on the edge my friend....one other important thing I didn't mention...before you race again...take the negative terminal to your battery off for at least 30min or so...this will clear the computer of your normal driving habits...you will be fresh going out on the track...leave the traction control ON...it will save your aussie @ss believe me on this one...the car will always be better than you...including me...