Hey guys the last time I ran my MRX4, the engine revved nice n high off the ground, but on the ground it ran quite a bit slow. Could this be that the adjuster nut is too tight? I had this problem with the R40 and the only way I got better acceleration was to loosen it. Aside from that maybe leaning out the low end would help a bit? At Floyd the car revved very weird like bbbwwwWAAAHHHBeewWWAAHHHbeeeWWAAHHH. I guess I need to take some time to really see whats up with it. Also, the plugs are a tiny bit smaller than the RB turbo plugs so maybe Nova's only will fit and run best with it. Soon as it gets going I can't wait to take it to the track.