just got back from the grove, my personal full bodied 03 rx-1 turbo weighing 635 lbs, and running a f-7 rear suspension with a 10.5 x 128 asphault track (the same sled that ran 151 mph in 1000 ft this year at cable) just ran a 9.0 with a best speed of 122 in the 1/8 and 153.66 in the 1/4, it did this spinning horribly for the first 330 ft, the 60 ft time was only a 1.55 not bad for my trail sled, lol. we are going back on tuesday, need to make a few small changes, (out of gear and more boost, suspension tuning) and it will be running in the 8's. i will get it on video for you, its a site to see. right now we are running 19 lbs of boost. engine is stock except for carillo rods, 10-1 wiseco pistons, hd studs, and hd valve springs. i can sell you a kit complete with everything you need and guarantee you the same results or your money back. jeff