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On an R33 in 5th gear divide the revs by 26. Thats a pretty close calculation. So 7000rpm in 5th gear is 269.23km/h. My car cuts out at about 5250 which is 201.9km/h. I don't understand why though as this is more than the factory 180km/h and when it hits it it's a rev limiter. Doesn't slow down at all and starts backfiring all over the place.

I have been well over 200 but the problem is, I dont think the speedo is too accurate at those kinds of speeds. From what I have seen 250 can be done(I have 19's though) and I think you might be able to push 265-270 maybe? Car floats a bit at those speeds and it is something I wont be doing again, way too un-safe!

On an R33 in 5th gear divide the revs by 26. Thats a pretty close calculation. So 7000rpm in 5th gear is 269.23km/h. My car cuts out at about 5250 which is 201.9km/h. I don't understand why though as this is more than the factory 180km/h and when it hits it it's a rev limiter. Doesn't slow down at all and starts backfiring all over the place.

The speedo is not right at those speeds I think.

Just so people don't lose sight of reality. (Not saying any of you are, just saying just in case.)

I've seen the results of a Monaro that was doing 250 on a freeway and lost it due to what at 110 km/h would be a small undulation but at 250 must have been a lot worse.

Car came to rest 250 metres down the road and 100 metres or so off to the left, set itself on fire and pretty much disintegrated. The guy died in the fire but probably wouldn't have made it anyway cos he was fairly mangled.

Below is the result of hitting a rock at speed when a car pulled out infront of us(not me driving). We were lucky though all that happened was I got a broken hand. Pic quality pretty bad as it was taken on a phone. Oh and that's the fuel tank on the back seat.

OUCH, Thats nasty!!!

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