Kyosho Mp9e by "targetingxmod"
#46
The thing is: NOW when squeezing the throttle it makes wheelies like a beast on crack steroids with cocain mixed on heroin! All with punch control at maximum and throttle curve very soft. (not yet working with the "torque limit" cause NO, yet, ok?) and finally been gentle on the trigger....
I had it flying again not because a corner, with no injuries but because of wheelie TAKE off from midle inicial aceleration and i really need those T-BONES bumpers and a wheelie bar!
With 22T it didn't wheelie at all. But with 30T pinion it will wheelie and fly....
Anyone can explain to me, why wheelies on demand with a bigger pinion and not with a smaller pinion, if we can say a 22T is smaller....
Good to hear you're having fun! It's a bit of a misconception that you only need high wheel axle Torque for wheelies (ever seen a crawler wheelie?) and that higher gearing causes lower acceleration (it doesn't, unless you run tiny racer motors - read whole page if interested - revised, easier to comprehend plots at the bottom of page). Higher wheel-speed also means your tires expand more, and bigger tires increase wheelies too. It takes some practice and getting used to how to throttle the UFO motor - get rid of the punch control, you see now yourself it doesn't do anything good and without it, the throttle response will be more predictable, you just need to practice and get a feeling a bit for how quick you can throttle up without going take-off.
Also the only thing the soft throttle curve does is make it easy to drive slow, but by doing so it compresses throttle response over the higher throttle range, which is the opposite you want now, better is to have it start a bit higher (so it starts driving immediately at more than crawler speed) so you have better throttle resolution (less steep curve) where it is needed, in the mid to higher end. Forget what worked on the mini, this is a bit more serious level of Power .
A big TBR front bumper will only increase front-end lift, adding a wing on the front instead to create downforce instead of lift, like Lizard's done with his Godzilla Slash will be better. Also the TBR wheeliebar lets the car get up quite high (wheels are too close to car and too high), which at high speeds will only cause it to launch or blow over. I got the TBR wheeliebar for my Truggy, but didn't put them on because my quick-and-dirty DIY thingy (see that it's lower and further from the car?) actually keeps the car more level than the TBR bar would. You could probably angle the TBR bumper a bit down when you heat it up with a heat gun though, it does have very nice big rubber wheels and does not look as flimsy as my creation. Also, with the smaller ugly yellow GRP tires you will get soon , I think it will wheelie a bit less. Anyway, just some thoughts.
Have fun!
Front up too high:
Better solution:
Edit:
Almost forgot, if you want to save some money on that 35T fly ratio spur and don't mind getting rid of your center diff and running a spool, I ordered a $10 30T 6mm bore pinion at aliexpress today, for use as a spur on my the GT2 tranny shaft. I think those nitro shafts should work on your mp9 too, maybe you still even have the shaft of before the conversion? You could try 30/30 gearing very cheap .
Last edited by Dr_T; 12-18-2014 at 01:06 AM.
#47
Tech Master
iTrader: (8)
That's a big misconception that I read on these forums all the time, that gearing up gives you less torque and gearing down gives you more. It's the opposite. With all of the motors I have run, gearing up gives you more power on the low end and top end. My mini 8ight buggy wheelies like crazy now with 35/45 gearing.
Get some belted tires and let it eat.
Get some belted tires and let it eat.
#48
Tech Elite
Thread Starter
That's a big misconception that I read on these forums all the time, that gearing up gives you less torque and gearing down gives you more. It's the opposite. With all of the motors I have run, gearing up gives you more power on the low end and top end. My mini 8ight buggy wheelies like crazy now with 35/45 gearing.
Get some belted tires and let it eat.
Get some belted tires and let it eat.
Anyway... make some tune in software...
Drag Brake - 20% instead of 0
Almost straight throttle curve instead of slow aceleration
75% of punch control instead of 100%
Dead horse glued tires for once more one pack!
Hum... more controlable animal... still a beast... but more like with 22T pinion that i can do everything with confidence. But not perfect yet!
Drag brake makes motor heating a little so need to find if 10% works or not, or just let it switch off.
But EPA on radio was in 70% i don't dare to make it 100% without a Tbone and wheelie bar. To much €'s flying makes me nervous!
Ultimatly i will go for 22T pinion if everything fails to drive it like with 22T that felt fast but predictable/controlable with no wheelies and with no heat without fan or end of pack
(new good speed tires now only for next year)
PS: Also new "bird" arrived from Germany!
Last edited by targetingxmod; 12-18-2014 at 08:38 AM.
#49
You're the first not to call me crazy when I say that 0verkill .
Hey man, what's wrong with you, are you going all sissy on us now???
That doesn't look like a baby or new twenty-something girlfriend at all .
That doesn't look like a baby or new twenty-something girlfriend at all .
#50
Tech Elite
Thread Starter
She said: you better playing with birds with wings that birds with skirts
#51
#52
Tech Elite
Thread Starter
#53
newb questions
What is difference between mp9e tk12 and tk13
#54
Tech Elite
Thread Starter
From mp9e to Mp9 tk2 i think major diference it's the shocks having a screw thread. Mine don't have...it is the plastic shims instead!
But user's of tk12 or tk13 should know better then me! Since mine is a Mp9 Nitro version original!
But user's of tk12 or tk13 should know better then me! Since mine is a Mp9 Nitro version original!
#55
Hurray! You finally got the ugly yellow wheels!!! Spokes don't even look that bad . Looking forward to your first impressions!
Now the 30T can stay for sure: 1500kv (did you check it yet?) @ 22.2V, 30/46 gearing, 13/43 diffs and 97 mm OD tires, yields 120 kmh unloaded, under load I'm guessing you'll see ~5-10% less (no gain this time as tires do not balloon like previously and with my truggy).
If you get the $5 Traxxas 34T pinion, will get you 136 kmh no-load, assuming 1500kv. For more speed, you need to ditch that humongous spur .
Now the 30T can stay for sure: 1500kv (did you check it yet?) @ 22.2V, 30/46 gearing, 13/43 diffs and 97 mm OD tires, yields 120 kmh unloaded, under load I'm guessing you'll see ~5-10% less (no gain this time as tires do not balloon like previously and with my truggy).
If you get the $5 Traxxas 34T pinion, will get you 136 kmh no-load, assuming 1500kv. For more speed, you need to ditch that humongous spur .
#56
Tech Elite
Thread Starter
#57
Tech Elite
Thread Starter
#58
Tech Elite
Thread Starter
#60
Tech Elite
Thread Starter
Thanks! I even think that it looks like it should be there now!
-Did a little change to on the springs for hard ones, which painted red and raised the car all around 5mm to give space for the front wing not to rub on the floor!
I will get a gps soon or a radar gun. I need to know how much kmh's this is going...
-Did a little change to on the springs for hard ones, which painted red and raised the car all around 5mm to give space for the front wing not to rub on the floor!
I will get a gps soon or a radar gun. I need to know how much kmh's this is going...