1900cc is still a pretty crazy engine in a dunebuggy. My brother's has an 1800cc in it right now, the new one he's building will have a turbo-charged 2250cc stroked motor in it... Are you using a VW in that?
The 1800cc gives us about 100or so Km/h, probably faster, though we can't really giv'er or we start to not be able to see from the wind, even with glasses on... You'd need full goggles for adequate protection, but the motor is also 40 years old, so it's nothin' to shake a stick at... Though the fact that yours has mounted weapons makes it cooler.
Ubique Quo Fas et Gloria Ducunt
Alternatively, I could just light you on fire. - Me