My modified jerez black M3 coupe - Gpower/Hartge/Hamann/Supersprint

[KonigsTiger]

Well whatever, fantastic video!! Thanks for posting and taking the time to edit that. The car sounds great.

[monsta]

Originally Posted by M-bitious

Here's the clip. Enjoy. I will make some clips myself this weekend. Spend more time on the exhaust note. And a guy will do a proffessional photoshoot.

Frank.

ps. off to bed it's 1.18 am here.

Sounds great...thanks for taking the time, I can't wait to hear this IRL...maybe next to a Eisenmann so I can really make my choice, and see which I like better...

[M-bitious]

Originally Posted by BMW-M-Mexico

You have tires that are 245/30 R20 and 295/25 R20?

The rears are 285/25. Didn't want to go too wide compared to the front.

[KonigsTiger]

Originally Posted by M-bitious

The rears are 285/25. Didn't want to go too wide compared to the front.

OK that means the circumference of your front tire is 2.2% smaller than OE and the rear is negligable. In any even, your speedo should be about 2.2% faster (smaller circumference) that OE plus the OE error that is said to be around 5%. South can probably varify these things I am just taking information from other threads. But it makes sense that your speedo may be off by around 7%.

[gorun]

Thanx for the video, awesome sound

[M-bitious]

Originally Posted by BMW-M-Mexico

OK that means the circumference of your front tire is 2.2% smaller than OE and the rear is negligable. In any even, your speedo should be about 2.2% faster (smaller circumference) that OE plus the OE error that is said to be around 5%. South can probably varify these things I am just taking information from other threads. But it makes sense that your speedo may be off by around 7%.

In my area there's a radar that shows your true speed. Indicated 100 kph, showed 98 kph on the display next to the road.
And when using the Miata tyre calculator the fronts only show a difference of 0,3%.

[KonigsTiger]

Originally Posted by M-bitious

In my area there's a radar that shows your true speed. Indicated 100 kph, showed 98 kph on the display next to the road.
And when using the Miata tyre calculator the fronts only show a difference of 0,3%.

Well thanks for that information, that does dispels some of the rumors about the speedo being 5% off (up) from stock!! I need to do the same sometime. 0.3% is nothing!!