Hey man your pretty close but not quiet on the money, if you want a speed demon buggy you almost have everything you need first you need to drop that 2200KV and move up to the 2650KV motor, run 6S and use 25/43 gearing with a locked center diff i just did this same set up on my losi eight buggy last week and im pulling 104 MPH under the radar gun consitantly for about 10 passes with out any heating issues what so ever and then the low voltage cut off kicks in. I started trying out the lipos from hobby city the turnigy packs and have had NO PROBLEMS WHAT SO EVER and the car runs great best part is there dirt cheap 58 dollars for a 4000MAH 6S 30C pack you can't beat that. BTW the 43T spur gear is made by losi.

here is a pic of my 104 MPH buggy, i know this is the HPYER 8 thread but if im not mistake the internal gear ratios in the diffs on both buggies are the same so you should get the same resaults asuming your drivetrain is smooth as glass!!!