Tekin RS ESC sensored
Tech Master
iTrader: (10)
Randy's talking about cheehtae's setup, not yours.
For your setup, your end rpm seems a little low, but that wouldn't cause the problem you are having. Is your drivetrain completely free? If it is, try a high amount of minimum throttle, 20 or above. Push won't make any difference. It only has an effect at neutral.
cheetae, as Randy says, your rpm range is way out for a TC, it's even a little out for a 17.5 12th! You really need to be in the range of 5000-20000. The way you have it now you are getting practically instant full timing.
Trev
For your setup, your end rpm seems a little low, but that wouldn't cause the problem you are having. Is your drivetrain completely free? If it is, try a high amount of minimum throttle, 20 or above. Push won't make any difference. It only has an effect at neutral.
cheetae, as Randy says, your rpm range is way out for a TC, it's even a little out for a 17.5 12th! You really need to be in the range of 5000-20000. The way you have it now you are getting practically instant full timing.
Trev
Drivetrain is free running. I'll try the higher min throttle and the wider rpm range, thanks.
Tech Elite
iTrader: (141)
try 203 paul if all else fails.
im going back to 203 as I feel 212 is lacking punch and top end.
im going back to 203 as I feel 212 is lacking punch and top end.
Tech Master
iTrader: (10)
Worst case I'll drop the Trinity Duo back in and add motor timing and drop off the turbo timing, no timing problems then
Tech Initiate
good 1/12th scale setup
Can we please come up with a GOOD 17.5 1/12th scale carpet setup?
There is not 1 on the website!
I am currently running:
~750 start rpm
~6500 end rpm
45 boost
10 turbo
.3 delay
ramp 2
Profile 4
rollout of 3.1"
minimum throttle of 5
I am about .4 seconds off fast lap (against VERY FAST guys)
My lap times fall off by about .4 seconds from beginning to the end. I come off the track about 140 F.
I have heard of people running some other things that are pretty fast as well.
Such as:
~750 start
~4500 end
40 boost
5 turbo
.1 delay
ramp 3
profile 4
minimum throttle 10
rollout of 3.25
I tried running this and came off at 170F. It was not so good.
Are these any good?
Thanks!
Rob
There is not 1 on the website!
I am currently running:
~750 start rpm
~6500 end rpm
45 boost
10 turbo
.3 delay
ramp 2
Profile 4
rollout of 3.1"
minimum throttle of 5
I am about .4 seconds off fast lap (against VERY FAST guys)
My lap times fall off by about .4 seconds from beginning to the end. I come off the track about 140 F.
I have heard of people running some other things that are pretty fast as well.
Such as:
~750 start
~4500 end
40 boost
5 turbo
.1 delay
ramp 3
profile 4
minimum throttle 10
rollout of 3.25
I tried running this and came off at 170F. It was not so good.
Are these any good?
Thanks!
Rob
Tech Lord
iTrader: (103)
Can we please come up with a GOOD 17.5 1/12th scale carpet setup?
There is not 1 on the website!
I am currently running:
~750 start rpm
~6500 end rpm
45 boost
10 turbo
.3 delay
ramp 2
Profile 4
rollout of 3.1"
minimum throttle of 5
I am about .4 seconds off fast lap (against VERY FAST guys)
My lap times fall off by about .4 seconds from beginning to the end. I come off the track about 140 F.
I have heard of people running some other things that are pretty fast as well.
Such as:
~750 start
~4500 end
40 boost
5 turbo
.1 delay
ramp 3
profile 4
minimum throttle 10
rollout of 3.25
I tried running this and came off at 170F. It was not so good.
Are these any good?
Thanks!
Rob
There is not 1 on the website!
I am currently running:
~750 start rpm
~6500 end rpm
45 boost
10 turbo
.3 delay
ramp 2
Profile 4
rollout of 3.1"
minimum throttle of 5
I am about .4 seconds off fast lap (against VERY FAST guys)
My lap times fall off by about .4 seconds from beginning to the end. I come off the track about 140 F.
I have heard of people running some other things that are pretty fast as well.
Such as:
~750 start
~4500 end
40 boost
5 turbo
.1 delay
ramp 3
profile 4
minimum throttle 10
rollout of 3.25
I tried running this and came off at 170F. It was not so good.
Are these any good?
Thanks!
Rob
i haven't tried 17.5 but for 13.5 i was using 7k to 9k end rpm and suffering. i was shocked how much my lap times improved.
really the goal for 1/12 17.5 setups with boost is to run as much gear as you can and still get good infield speed. then use timing boost to accelerate out of the corners and then turbo to get you to top speed down the straight.
IMHO 700 is way too low for even 17.5 1/12. at that rpm range, it should be all motor torque getting you around. remember that electric motors have infinite amount of torque at sero rpm and near zero it is exponention. if you log your session on the track, i would bet that you are never off timing boost. even on smaller tracks, I have not seen cars rolling less then 1500-2000 rpm with a 17.5 1/12. and for the top end, you will never get past 9000 in a 1/12. if you do, then you are geared too low. if you figure a 17.5 motor is ~2200Kv, the max voltage out of a pack is 4.22, then your top rpm is 9284.
figure your low rpm to be the rpm at which you exit a corner and max rpm is the rpm at which you enter a corner before you let off. and turbo timing to be engaged 1/12 down the straight. the timing boost and turbo values are basically what you can set to keep the motor from fading.
IMHO 700 is way too low for even 17.5 1/12. at that rpm range, it should be all motor torque getting you around. remember that electric motors have infinite amount of torque at sero rpm and near zero it is exponention. if you log your session on the track, i would bet that you are never off timing boost. even on smaller tracks, I have not seen cars rolling less then 1500-2000 rpm with a 17.5 1/12. and for the top end, you will never get past 9000 in a 1/12. if you do, then you are geared too low. if you figure a 17.5 motor is ~2200Kv, the max voltage out of a pack is 4.22, then your top rpm is 9284.
figure your low rpm to be the rpm at which you exit a corner and max rpm is the rpm at which you enter a corner before you let off. and turbo timing to be engaged 1/12 down the straight. the timing boost and turbo values are basically what you can set to keep the motor from fading.
Tech Regular
iTrader: (16)
Just for reference (yes I know it is a no-no, but I'm a big boy and understand the consequences) it free revs to about 22k with this set-up on the bench.
I have other runs with different settings, the same settings, and different gearing as well.
Obviously this won't apply to everyone and each track will be different... But I put this out there as some quantitative food for thought!
Setup used is at the top (this was my first time using a Tekin so be kind) and the average, min and max is in the upper left side. Duo 1 17.5 0 deg. timing.
Mike Slaughter
Last edited by masterhit; 11-23-2010 at 07:02 AM.
Realistically the top RPM was about 12k on a fresh pack and averaged out to be about 11k. I feel the 15k spikes were from bumps letting it free rev.
Just for reference (yes I know it is a no-no, but I'm a big boy and understand the consequences) it free revs to about 22k with this set-up on the bench.
Just for reference (yes I know it is a no-no, but I'm a big boy and understand the consequences) it free revs to about 22k with this set-up on the bench.
Last edited by theisgroup; 11-23-2010 at 07:00 AM.
Tech Elite
iTrader: (15)
Tech Regular
iTrader: (16)
you ever log the throttle position and over lay it with the rpm? do you see a dip in rpm right when you see 100% throttle? if you ever figure that out, lmk. i have never figured that phenom out. it does not happen when the pack is fresh, but after a little bit, you start to see the dip in rpm. i always wonder if that is because we are not seeing a high enough resolution on the samples to get a real rpm at that time.
Tech Regular
iTrader: (16)
I have ran with the voltage logger and the packs do take a beating and the correlation is fairly obvious. This resulted in us dropping the end RPM down to the 6k range. I will dig up the raw data, but the first 3-6 laps are absolutely phenomenal with the Tekin and then they drop off hard.
My usual mule is a Black Diamond. I lose up front but at the end I am matching Tekin times. Were basically trying to figure out why the Tekin drops so hard.
For reference, I have lap time data and run with some of the fastest carpet racers each week at Rapid Competition in Grand Rapids MI. Our mains consist of multiple ROAR champions, multiple year Cleveland winners (including last years), and even Worlds finalists.
Not bragging, just putting that out there that we can run consistent laps with some of the best for comparison. Your mileage may very, this is only worth the price paid, etc......
Mmmmmm! I love me some data!!!
Mike Slaughter
Last edited by masterhit; 11-23-2010 at 12:16 PM.
yeah, i was not talking about turbo. i do see the turbo actually kicking in, but it is not as dramatic as at the beginning of the pack. but if you watch the first sample after the 100% throttle sample, you will see the rpm drops about 500.
as far as the trubo, it think it is because most are over timing the motor and by the end of the run, the timing is not as effective at boosting rpm and just generates heat. I think if you bump the timing down and then watch the logger, you will see a more consistent spike in rpm as turbo kicks in even at the end of the run. that is what i saw when 203 first came out. we ran the loggers for hours and on several cars. consistently they showed the turbo kicking in, but much less effective on boosting RPM at the end of the run, if we put a lot of timing/tubo in on the setup.
as far as the trubo, it think it is because most are over timing the motor and by the end of the run, the timing is not as effective at boosting rpm and just generates heat. I think if you bump the timing down and then watch the logger, you will see a more consistent spike in rpm as turbo kicks in even at the end of the run. that is what i saw when 203 first came out. we ran the loggers for hours and on several cars. consistently they showed the turbo kicking in, but much less effective on boosting RPM at the end of the run, if we put a lot of timing/tubo in on the setup.
Tech Adept
iTrader: (1)
I had a strange problem this weekend running 212 with no boost in 17.5 tc. Mostly always run Throttle Profile 3, but thought I would try to smooth things out and try TP2. When I did this the car would not respond to forward throttle input at all and if I pushed brake the car would go forward like an on off switch. Tried recalibrating the esc to the radio but still wouldn't recognize throttle input, only brake. Tried reversing the throttle on the radio, same thing. Went back to TP3 and all was normal again. Toggled back and forth between TP3 and 2, everytime I select TP2 it does the same thing. Anybody else ever have a similar issue? It wasn't really a problem as I just ran TP3 and put neg expo in the radio, but still thought it was strange.