I have to say, your post inspired me to use Google's conversion functionality:
"convert 250 km/h to mph" returns "250 km/h = 155.342798 mph"
It also inspired me to try and find out where Manama was:
http://maps.google.com/maps?f=...=addr
I really wish I had your oppurtunity (problem) in street driving conditions.
Nonetheless, I'm guess you are trying to remove the rev limiter/speed limiter in the computer that is probably kicking in the fuel cutoff. You will probably need some kind of programmer or ECU upgrade like the jetchips products.