R/C Tech Forums - The Speed Passion Thread

Is there a way to figure out rough topend RPM for a motor, taking timing into account?

For instance, using 17.5T = 2200kV (ballpark) with a 1S setup, max RPM on a full battery figures to be ~9.2k, or, with an ~83mm rollout, about 26mph, which seems on the low side. That makes sense, because this doesn't add 10* endbell + ESC boost/turbo timing advance... any way of figuring this in?

All I'm really trying to get is a topend RPM, so I can use that to figure boost slope.

You need a motor dyno machine...or I think NOVAK has that software that you can do while you are racing....also, under load or no load..? Big different in RPM.

rc_jammer

04-12-2011 02:50 PM

Hi Guys,

Hoping someone can really help me here.

I've been running 205 mod software on a smallish size tarmac track with pretty good success on a 4T V3 SP motor geared about 7.6. DRRS at level 7/8 and AMTS timing at 26.25

Its just lacking a little top speed so was hoping someone could point me in the right direction to which software to use to add a little boost timing or is this the same as AMTS (dont really understand)? What would I change to get this extra top speed and would I need to change the gearing much?

Thanks or the responses

mr crum

04-12-2011 03:35 PM

Quote:

Originally Posted by rc_jammer (Post 8953888)

what are your temp after a run that will determine how much wiggle room you have i would say for more top end remove some timing and add some teeth to the pinion most important to watch temp tho

skypilot

04-12-2011 08:07 PM

Quote:

Originally Posted by rc_jammer (Post 8953888)

Pretty simple. Drop the timing to 18.75 or less and gear up.

irgo	04-13-2011 01:02 AM

Quote:

Originally Posted by Solara (Post 8952994)

You need a motor dyno machine...or I think NOVAK has that software that you can do while you are racing....also, under load or no load..? Big different in RPM.

Sp engineer has it, the next new esc firmware is rpm log included.

StevenOlsen

04-13-2011 02:33 PM

hi guys.

just mounted my new SP GT2.0 and a 4.0. im going to run on a large outdoor track and what to use timing. but im am a little confused about what software to use, 422, 528, 212 ???

Steven

g12314

04-13-2011 02:44 PM

Quote:

Originally Posted by StevenOlsen (Post 8959427)

hi guys.

just mounted my new SP GT2.0 and a 4.0. im going to run on a large outdoor track and what to use timing. but im am a little confused about what software to use, 422, 528, 212 ???

Steven

Setups to use as starting points are here: http://www.speedpassion.net/en/escsetup.asp

Joel Lagace

04-13-2011 09:09 PM

Quick question...

I have boosted stock software on my ESC. I want to run mod. Do i need to flash to a different firmware. OR is setting setting SC BOOST LEVEL to "OFF" enough to disable the supercharge items 12-15. If it does effectively shut off boost. Is there any advantage to running a MOD specific firmware for mod motors over using stock software with boost off?

Also does interface V1.35 contain new mod and stock software?

Thanks

robk	04-13-2011 09:23 PM

Quote:

Originally Posted by irgo (Post 8956524)

Sp engineer has it, the next new esc firmware is rpm log included.

Excellent, you are the only person who cares.:rolleyes:

charlie_b

04-13-2011 09:47 PM

Quote:

Originally Posted by Joel Lagace (Post 8961452)

You need to re-flash it. Turning off boost alone isn't enough..there is still timing advance before WOT so to be fair, just use the 508 software.

Joel Lagace

04-14-2011 03:57 AM

Thanks charlieB!!!

Last nite i had tried a 10.5 in my cough durango and was thermal-ling.. i had boost to OFF but it did not seem enough.. (we run a very tight carpet offroad track)

Joel Lagace

04-14-2011 05:20 AM

just flashed 508, i'll test it next race see how it goes. I see that now there is only punch and no timing options at all. Im hoping this cures my problem from last nite..

sidecarphil1

04-14-2011 09:03 AM

hey guys

I would like a good set up for an asphalt track with a huge 70m straight motor is a SP13.5v3 and the speedo is a GT2.0 with 528 stock softwere ;-)

Thanks in advance Phil

skypilot

04-14-2011 07:57 PM

Quote:

Originally Posted by irgo (Post 8956524)

Sp engineer has it, the next new esc firmware is rpm log included.

you must mean the next one after this one :lol:

Charlie B. you going to make to Reedy this year?

rctechuser015851

04-14-2011 10:24 PM

Hey guys just picked up an LPF GT2.0 carbon esc for my new losi 22. I just didnt feel like spending 200+ on another brand and Ive heard great things about SP. Now can this version be upgraded in terms of software? And how many drive profiles does it have? Ive had the best luck with LRP in the past and Im hoping to have the same smoothness here. Plus the smaller footprint of this esc will be good because theres not much room under the shell on the car. very tight space.

Any other feedback is good to hear, Im new to the brand.

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