Fortunately the 4 speed in the porsche has some nice gear ratios but its the final ratio that really sucks.

Currently the car is set up to do 198 MPH at 6500 RPM in 4th and you can get all the way up to 60 MPH in first.

I want to usa a 3.05 or 3.10 final ratio to bring my top speed to around 155 MPH and my top first gear speed to around 45 MPH.

I figure I have no need to go faster than that and it will speed me up through the rest of the gears.