30mph? How?

[nitrostarter]

Ok, so a State Trooper moved in across the street since he was displaced from Hurricane Katrina. I finally caught up with him to use his radar. I made some passes for him and the best he shot was 30mph. When he told me that, I looked like :W: . I was hurt.

My Emaxx:
http://photobucket.com/albums/a184/nitrostarter/

Torpedo Chassis
UE 6 Spyder diffs
FLM Bulks
Dace Wing Towers
PL Suspension Kit
UE SuperShocks (4)
MIP Fr, Rr, Cen. CVDs
Hitec 645MG servo
RPM Stablemaxx Titan wheels
Bowites Tires
Feigao 9L/Bk18120
Rx Pack
14 GP3300's
RC Monster Idlers
Hitec Aggressor 3-Channel Radio


Could that radar be right? I thought people were hitting 40mph easily with a 9L? I need to look for a GPS.
I also used Aqwut's excel calc. sheet and came up with like 29.11 mph. I thought I was missing something so I ignored it.