Post by kliff on Aug 11, 2009 5:51:49 GMT -5
OK, gonna throw up a few up dates and tidbits through the day to day, then I'll check-out for a day or so tomorrow.
Back to the oversize variator. Seemed a lot of work was being done hear and at SD, and some of which, I just plain didn't agree with, some I was skeptical of, and some I wanted to prove for myself.
Point #1, the lighter face plate, and pressure cast try" unit are lighter by a litle over 150 grams(PFS unit) to about 250 grams(Prodigy), didn't have a KOSO to weigh. But I'd bet it's lighter too. So going back to general "hot rodding 101" any reduction in reciprocating weight, will decrease the time in which the engine "spools up" to max rpm.
As you can see in this pic, with a stock variator, and 12gr weights/835mm belt, I was no where approaching the maximum efficency or speed of this unit.... but I was screaming closer to 8000 rpm way too often.
My approach was to start with some 14g weights. Well, I didn't have none. Had some 12g DrP sliders though. so with some card bord to plug one end, some 2gr weights, and some JB Quik, I ended up with some 14.3's
It was about now, I thought maybe a 1000 in/lb torque spring, and some 1000rpm clutch springs might also help get this little babe into the torque band before fully loading...
Then an 842 belt, the obligatory sharpie treatment...
And off for a ride..... MISSION ACCOMPLISHED
]
Now the diameter of the variator is being used, acceleration while slightly slower, is still commendable(Blue torque and clutch springs!)
Flat open roads show some great RPMs now...(.chinometer MPH's)
60mph=6000rpm
65mph=6500rpm
70mph=7000rpm
At about 72mph on flat ground, I'm done. But she does hold 5-10mph MORE on the uphills now too.
The combos are there guys, just gotta play around a little. Remember, I'm 260lbs, and the only other cahnges to this bike are a drilled OEM muffler, drilled air box, and 37/110 jets.
The biggest point being, when going to a larger variator, you gotta INCREASE slider weight, not reduce it. Belt clamping force and speed is by that weight, with a larger, but LIGHTER variator, add weight. 13.5 minimum for light weights, 14+ for heavy weights and hilly terrain, when exceeding 14g, look at a torque spring and possibly clutch springs too. It's a CVT UNIT, make it work as a unit, design and test your mods from front to back, not with binders on, looking only at the variator.
I'm stoked....great mod, pleasant ride, smoother variator action, quieter with the DrP sliders, and no more engine buzzing like it's on the edge of destruction.
Back to the oversize variator. Seemed a lot of work was being done hear and at SD, and some of which, I just plain didn't agree with, some I was skeptical of, and some I wanted to prove for myself.
Point #1, the lighter face plate, and pressure cast try" unit are lighter by a litle over 150 grams(PFS unit) to about 250 grams(Prodigy), didn't have a KOSO to weigh. But I'd bet it's lighter too. So going back to general "hot rodding 101" any reduction in reciprocating weight, will decrease the time in which the engine "spools up" to max rpm.
As you can see in this pic, with a stock variator, and 12gr weights/835mm belt, I was no where approaching the maximum efficency or speed of this unit.... but I was screaming closer to 8000 rpm way too often.
My approach was to start with some 14g weights. Well, I didn't have none. Had some 12g DrP sliders though. so with some card bord to plug one end, some 2gr weights, and some JB Quik, I ended up with some 14.3's
It was about now, I thought maybe a 1000 in/lb torque spring, and some 1000rpm clutch springs might also help get this little babe into the torque band before fully loading...
Then an 842 belt, the obligatory sharpie treatment...
And off for a ride..... MISSION ACCOMPLISHED
]
Now the diameter of the variator is being used, acceleration while slightly slower, is still commendable(Blue torque and clutch springs!)
Flat open roads show some great RPMs now...(.chinometer MPH's)
60mph=6000rpm
65mph=6500rpm
70mph=7000rpm
At about 72mph on flat ground, I'm done. But she does hold 5-10mph MORE on the uphills now too.
The combos are there guys, just gotta play around a little. Remember, I'm 260lbs, and the only other cahnges to this bike are a drilled OEM muffler, drilled air box, and 37/110 jets.
The biggest point being, when going to a larger variator, you gotta INCREASE slider weight, not reduce it. Belt clamping force and speed is by that weight, with a larger, but LIGHTER variator, add weight. 13.5 minimum for light weights, 14+ for heavy weights and hilly terrain, when exceeding 14g, look at a torque spring and possibly clutch springs too. It's a CVT UNIT, make it work as a unit, design and test your mods from front to back, not with binders on, looking only at the variator.
I'm stoked....great mod, pleasant ride, smoother variator action, quieter with the DrP sliders, and no more engine buzzing like it's on the edge of destruction.