K
krat
Member
the reason for the 18/39 was that I wanted to gear it down with minimum parts to be replaced. so I went from 19 to 18 with the same chain.
for you clutching, don't try to tune with the setup from someone else. we all have different sled (paddle length, gearing, stock wheel/big wheel, track length, etc...) but whatever these mods, your target RPM should be 7200-7400 (for the 900cc). at 8000 you have passed the peak of the power curve (rpm vs hp) and the engine will produce less power if you rev your engine above the peak hp's rpm.
let's recap again, on WOT we want to hold the engine at the peak power as the cvt is shifting out. So for the 900rmk/fusion we want the rpm to stay at 7300 (with wot) while the sled mph is increasing.
First of all we need to know what your RPM is doing with your actual clutch settings. (with WOT from 0 to 75mph)
- one thing we know for sure, it start to shift too late (8000 rather than 7300)
- does your rpm start to drop from mid to top-end?
- does it hold the same rpm until top-end and then increase slowly (good)
- does it overshoot too much: from 0 to 25mph the rpm go to 8000 and then settle down to 7800 and stay flat all the way to end of shift?
what is your current spring/weight and spring/helix? (scuse me I will re-read the thread first lol)
krat
for you clutching, don't try to tune with the setup from someone else. we all have different sled (paddle length, gearing, stock wheel/big wheel, track length, etc...) but whatever these mods, your target RPM should be 7200-7400 (for the 900cc). at 8000 you have passed the peak of the power curve (rpm vs hp) and the engine will produce less power if you rev your engine above the peak hp's rpm.
let's recap again, on WOT we want to hold the engine at the peak power as the cvt is shifting out. So for the 900rmk/fusion we want the rpm to stay at 7300 (with wot) while the sled mph is increasing.
First of all we need to know what your RPM is doing with your actual clutch settings. (with WOT from 0 to 75mph)
- one thing we know for sure, it start to shift too late (8000 rather than 7300)
- does your rpm start to drop from mid to top-end?
- does it hold the same rpm until top-end and then increase slowly (good)
- does it overshoot too much: from 0 to 25mph the rpm go to 8000 and then settle down to 7800 and stay flat all the way to end of shift?
what is your current spring/weight and spring/helix? (scuse me I will re-read the thread first lol)
krat
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