I have been reading this post with interest and cannot resist adding my 10 cents worth. At the risk of returning to the original thread, I cant believe that after 4 pages of posts, and the number of techies reading this, that no-one has posted the correct answer regarding a limiter. The fact as far as I can see is that the car does NOT have a speed limiter. There I've said it. It does have a REV limiter since this is much easier to program in the ECU, and it is set to 6000rpm. It doesn't matter which gear you are in. At 6000rpm, the engine pulls sparks and reduces power. As for top speed this is simple maths. As long as you have enough power to push the car through the air, the speed is proportional to the revs in top gear. A simple test @ 1500 rpm = 63kph = 252kph @ 6000rpm @ 2000 rpm = 82kph = 246kph @ 6000rpm Close enough to see the correlation, and close to quoted figures given that these were speedo readings (using the average speed trip meter) So any variation in top speeds that people are getting is purely due to final drive ratio (including tyres rolling radius which is affected by tyre pressure), speedometer accuracy etc. OK, you can all go back to bragging about how fast you have driven along your favourite 'safe' bit of road. Shoot me down in flames if I have got it wrong.