Ko BMC Speedo
12-02-2009, 10:43 PM
#826
Tech Apprentice
Originally Posted by Johnny Wishbone
The trailing end of the graph is where the boost kicks in and to make it come on sooner or later on the straight can be adjusted by the flatter you make the end of the line, so if you want the boost to come on sooner in the straight you would make the last 5 bars all the same freq opposed to if you want the boost on later, you would have the last to bars the same.
just to clarify, if I make a flat graph, all bars are on the top (low frequency), the boost would kick in too early. is it right?
12-03-2009, 03:34 AM
#827
Originally Posted by radio_car_racer
Cheers
I now have a setting to work from from Melvin
I now have a setting to work from from Melvin
12-03-2009, 07:32 AM
#828
Originally Posted by radio_car_racer
Cheers
I now have a setting to work from from Melvin
I now have a setting to work from from Melvin
12-03-2009, 07:42 AM
#829
Originally Posted by krat
thanks a lot, Johnny.
just to clarify, if I make a flat graph, all bars are on the top (low frequency), the boost would kick in too early. is it right?
just to clarify, if I make a flat graph, all bars are on the top (low frequency), the boost would kick in too early. is it right?
Thats correct, you would never let the motor get to that freq range for the boost to kick in.
Not to be mistaken but one curve won't be good for all the different classes. Where a TC seems to need the torque at the start to get the car going and thru the infield for driveability and the finally the boost on the straight a 1/12th probably can get away with much less torque at the start but then could use a little more for the infield and again the boost on the straight, so a TC profile would look like it starts out high and flat and then eventually tapers to low freq for the boost to come on and a 1/12th profile could look more like a camels hump, although being careful not to have the mid peak so high that the torque is coming in and snapping the car out in the corners. Again these are JMO, please feel free to add to this if I'm right or wrong.
12-04-2009, 02:13 AM
#830
Originally Posted by Johnny Wishbone
Thats correct, you would never let the motor get to that freq range for the boost to kick in.
Not to be mistaken but one curve won't be good for all the different classes. Where a TC seems to need the torque at the start to get the car going and thru the infield for driveability and the finally the boost on the straight a 1/12th probably can get away with much less torque at the start but then could use a little more for the infield and again the boost on the straight, so a TC profile would look like it starts out high and flat and then eventually tapers to low freq for the boost to come on and a 1/12th profile could look more like a camels hump, although being careful not to have the mid peak so high that the torque is coming in and snapping the car out in the corners. Again these are JMO, please feel free to add to this if I'm right or wrong.
Not to be mistaken but one curve won't be good for all the different classes. Where a TC seems to need the torque at the start to get the car going and thru the infield for driveability and the finally the boost on the straight a 1/12th probably can get away with much less torque at the start but then could use a little more for the infield and again the boost on the straight, so a TC profile would look like it starts out high and flat and then eventually tapers to low freq for the boost to come on and a 1/12th profile could look more like a camels hump, although being careful not to have the mid peak so high that the torque is coming in and snapping the car out in the corners. Again these are JMO, please feel free to add to this if I'm right or wrong.
I run my 1/12th on asphalt and run a 5T motor. I use the Kopropo profile.
Do you have a esc curve that you can post. Do you recomend in terms of brakes frequency and drag brakes.
Thanks
12-07-2009, 10:06 AM
#832
Sorry guys I just don't run low turn or mod motors so I can't help you out. Maybe someone like Drew or Heibiki will have something, but I don't know if they run 1/12th.
The thing is to try a profile that looks like a camels hump, but start it off about in the middle of the freq, if it hits to hard on the starts, drag the AVG bar down till it doesn't hit as hard and then go from there. You might have to tune a little for mid field and start of timing boost, but it should be pretty simple.
The thing is to try a profile that looks like a camels hump, but start it off about in the middle of the freq, if it hits to hard on the starts, drag the AVG bar down till it doesn't hit as hard and then go from there. You might have to tune a little for mid field and start of timing boost, but it should be pretty simple.
12-07-2009, 11:15 AM
#833
Originally Posted by Johnny Wishbone
Sorry guys I just don't run low turn or mod motors so I can't help you out. Maybe someone like Drew or Heibiki will have something, but I don't know if they run 1/12th.
The thing is to try a profile that looks like a camels hump, but start it off about in the middle of the freq, if it hits to hard on the starts, drag the AVG bar down till it doesn't hit as hard and then go from there. You might have to tune a little for mid field and start of timing boost, but it should be pretty simple.
The thing is to try a profile that looks like a camels hump, but start it off about in the middle of the freq, if it hits to hard on the starts, drag the AVG bar down till it doesn't hit as hard and then go from there. You might have to tune a little for mid field and start of timing boost, but it should be pretty simple.
the fastest i run is 13.5. mostly 17.5 though. 
sorry guys.
12-07-2009, 07:20 PM
#834
Originally Posted by ds400
Hi Johnny,
I run my 1/12th on asphalt and run a 5T motor. I use the Kopropo profile.
Do you have a esc curve that you can post. Do you recomend in terms of brakes frequency and drag brakes.
Thanks
I run my 1/12th on asphalt and run a 5T motor. I use the Kopropo profile.
Do you have a esc curve that you can post. Do you recomend in terms of brakes frequency and drag brakes.
Thanks
Last edited by goop; 12-07-2009 at 07:34 PM.
12-07-2009, 09:16 PM
#835
Originally Posted by goop
try this you will have to play with the drag brake but this should work good for mod 1/12 use model 5
Why doest the curve start at 3.38... which I think high...?
Thanks again can you just descride why the curve starts at a high frequency and then comes down to low frequency and back up again....?
Cheers m8
12-08-2009, 02:32 AM
#836
Originally Posted by goop
try this you will have to play with the drag brake but this should work good for mod 1/12 use model 5
need some for very technical (short n tide with lots of U turn) track but with a 100' straight n sweeper...
12-08-2009, 08:18 AM
#837
Originally Posted by goop
try this you will have to play with the drag brake but this should work good for mod 1/12 use model 5
Sorry I forgot about you GOOP in my previous post, thanks for the info.
12-08-2009, 08:19 AM
#838
Originally Posted by B4james
Would you or anyone else be able to post this SPX killer profile ? Please
Still looking for this profile, anyone?
12-08-2009, 09:46 AM
#840
Tech Master
Originally Posted by Johnny Wishbone
Still looking for this profile, anyone?
On another note, I am running fanless for the esc, but wondered if heat will gradually make the speedo slower during the race. I also heard that the esc fan is mandatory for boosted applications. Is this true?
