there is no govenor on the woo... you run out of engine steam about there usually. i've had my green woo well over 120, kinky has been faster than that in his forenza
I think the gearing in the Automatic runs out about there. The engine has plenty left, but when the car shifts into fourth gear @ about 100 mph, it simply runs out of gearing to allow it to go faster. If you want to gain a few extra mph, leave the automatic transmission in D3 instead of D4 until the ECU forces it to shift. You'll be able to get to about 110-115 mph, depending on how well your car breathes and in what condition it is in.
That would make sense, I got my nubi up to 110, and it wouldn't push any farther... :-/ I was kinda bummed cuz i was only at like 4200 rpm... and plenty of room left on the tach before redline...
I've also had the same problem on my '00 Lanos. I leave it in D3 until the ECU shifts up to fourth, usually at ~110-115. Haven't been able to get any faster than that. Would it be possible for a tranny shop to modify the gear ratios to help with the dropoff in 4th?