old mate
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g'day g'day,
as i am planning to take the ute to the racetrack for some legal fun, i know its underpowered and underbraked but its the only was to have some fun and not go to jail these days, i've decided that before i go, a diff gear swap is in order, along with an lsd centre or mini spool. mini spool is cheaper but its not road legal.
so i'm going to go from the standard 3.08 ratio to something a bit shorter, as using my tyre size (235/45 17 inch) and a 5500rpm rev limit (im not sure what the ecotec revs to, i dont have a tacho =(, theres another job) gives me these theoretical speeds (wont be accurate due to possible clutch slip and ballooning of tyres)
1st: ratio 3.829:1 - 56.53 km/h
2nd: ratio 2.199:1 - 98.44 km/h
3rd: ratio 1.401:1 - 154.51 km/h
4th: ratio 1.000:1 - 216.47 km/h
5th: ratio 0.809:1 - 267.56 km/h
not sure if i did this right, but it should sit at 2055 rpm at 100 km/h in 5th gear..
now i know that the V6 will never get that speed in 5th gear, which is kind of a waste, but i'll still need it to be reasonable for highway driving so was thinking about a 3.55 ratio rear end. speeds are:
1st: ratio 3.829:1 - 49.05 km/h
2nd: ratio 2.199:1 - 85.41 km/h
3rd: ratio 1.401:1 - 134.05 km/h
4th: ratio 1.000:1 - 187.81 km/h
5th: ratio 0.809:1 - 232.14 km/h
and will sit at 2369 rpm at 100 km/h.
would this ratio be a fairly good compromise, if my calculations are in the ballpark, it seems reasonable for the lack of engine power etc.
opinions?
this swap is looking close as i have a nice diff oil leak that needs attention, so might just do it at the same time.
:thumbsup:
as i am planning to take the ute to the racetrack for some legal fun, i know its underpowered and underbraked but its the only was to have some fun and not go to jail these days, i've decided that before i go, a diff gear swap is in order, along with an lsd centre or mini spool. mini spool is cheaper but its not road legal.
so i'm going to go from the standard 3.08 ratio to something a bit shorter, as using my tyre size (235/45 17 inch) and a 5500rpm rev limit (im not sure what the ecotec revs to, i dont have a tacho =(, theres another job) gives me these theoretical speeds (wont be accurate due to possible clutch slip and ballooning of tyres)
1st: ratio 3.829:1 - 56.53 km/h
2nd: ratio 2.199:1 - 98.44 km/h
3rd: ratio 1.401:1 - 154.51 km/h
4th: ratio 1.000:1 - 216.47 km/h
5th: ratio 0.809:1 - 267.56 km/h
not sure if i did this right, but it should sit at 2055 rpm at 100 km/h in 5th gear..
now i know that the V6 will never get that speed in 5th gear, which is kind of a waste, but i'll still need it to be reasonable for highway driving so was thinking about a 3.55 ratio rear end. speeds are:
1st: ratio 3.829:1 - 49.05 km/h
2nd: ratio 2.199:1 - 85.41 km/h
3rd: ratio 1.401:1 - 134.05 km/h
4th: ratio 1.000:1 - 187.81 km/h
5th: ratio 0.809:1 - 232.14 km/h
and will sit at 2369 rpm at 100 km/h.
would this ratio be a fairly good compromise, if my calculations are in the ballpark, it seems reasonable for the lack of engine power etc.
opinions?
this swap is looking close as i have a nice diff oil leak that needs attention, so might just do it at the same time.
:thumbsup: