True 0-60 time
 

Hi guys,

I am doing an indept review of the cosworth supercharger+all my performance modafactions.

Can someone tell me what speed you must be doing to really be at 60MPH as i think the cars are manufactured to read low and i dont have the handware to calculate by GPS.

Example-64mph on the display is 60mph by GPS

Thanks guys

depends on tire size. When I was stock(lol) my car and gps were pretty much the same

I'm on 235/45/17 tires and my speedo reads 1-2 MPH under my actual speed. when I was on stock tires, the speedo was accurate.

So wider the tire the speedo will read slightly under?

it's about how tall the tire is

Thank you sir, good to know.