final drive ratio for circuit.

[Arieke]

So I had a blast on Zandvoort with my car. My top speed was 172km/u I want more.


My engine 195hp@6200 and 240nm@5000

gearbox mt75 1ste 3.89 -- 2nd 2.08 -- 3rd 1.34 -- 4th 1.0 -- 5th 0.82

Final drive is 3.78
Tires are 195/50-15 (slicks are 205/50-13 so speeds -10km/u)

So 172km/u was +-6000rpm and was at the end of the straight so 5th wouldn't be a option.


So I have been thinking to change ratio's.
First option was to get a 3.45 and then the top speed would be +-195km/u and then i wouldn't need a 5th gear. But i would lose acceleration.

second option is to get a 4.11 (gain acceleration?) and then 4th gear would be +-165km/u but then i maybe could use 5the gear, speed would be +-195km/u
rpm drop from 4th to 5th is 1100 (5100)


Adding more power to the engine would be a option to. But wilder cams so the engine revs higher. But other engine isn't for the year.


Any advice is welcome. I won't change gearbox. :-) The car does only track days. Not street legal.


I'm using my spare axle because the week (28th april) before i broke the diff. So want to build a fresh one and put the spare one back. broken axle and spare had the same ratio 3.78