Originally Posted by Mason
28c = 82F. . its 69F roughly 20c here currently and i'm just over an hour north of jason.
Oh damn! I knew I shouldn't have asked!
It's about 5 degrees celcius here with aslight drizzle.......
2.4" = 61mm diameter
With 17/128 that makes a rollout of 25.45 mm.
That was about what I had on the car. As far as I could tell on the damp track it felt good.
On the 5.5 motor I noticed the following:
Top speed was highest with rollout between 32 and 33 mm, but runtime was reduced dramatically compared to a slightly lower rollout.
Furthermore, the motor runs dramatically hotter with a too tall gearing.
The car ran best with rollout between 29 and 32mm.
In that range it didn't really care where you are exactly, it will be about equally fast.
Let's see how the 3.5 fares!