R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 04-22-2009, 05:29 AM   #106
Tech Champion
 
CraigM's Avatar
 
Join Date: Mar 2007
Location: Sydney, Australia
Posts: 7,009
Trader Rating: 34 (100%+)
Default

Quote:
Originally Posted by burito View Post
- 5-8 on 80710 are the real stock profiles, 7+8 are the extreme ones were you need much lower gearing
I think the manual should come with this info It's a tribute to the quality of the stock spec motors that they can take profiles 7-8 without much gearing change compared with 6-7, but other brands' motors are more susceptible to damage on those profiles so I think starting FDR/rollouts should be included with the spx manual
__________________
www.facebook.com/mcpheerc
CraigM is offline   Reply With Quote
Old 04-22-2009, 07:08 AM   #107
Tech Master
 
Join Date: Nov 2003
Posts: 1,052
Trader Rating: 16 (94%+)
Default

Quote:
Originally Posted by CraigM View Post
I think the manual should come with this info It's a tribute to the quality of the stock spec motors that they can take profiles 7-8 without much gearing change compared with 6-7, but other brands' motors are more susceptible to damage on those profiles so I think starting FDR/rollouts should be included with the spx manual
I agree on both points, the manual should include a little more detail about how those profiles should be geared, and the quality of the LRP Stock Spec motors is awesome. I have only used the LRP Stock Spec motors on my SPX's and have had zero issues to date.
kn7671 is offline   Reply With Quote
Old 04-22-2009, 08:46 AM   #108
Tech Addict
 
burito's Avatar
 
Join Date: Feb 2002
Location: Germany
Posts: 511
Default

You're right about the manual to some extend, we never had gearing recommendations in our speedo manuals but in the case of the SPX StockSpec we could (or should) have mentioned it more clear that the high profiles require a much smaller pinion.
Will make sure this get's improved with a possible manual update or future products.

As for the damage of other motors, when used with high speedo profiles on SPX StockSpec, I don't really now why they get damaged so much easier then our own X11 StockSpec as mechanical timing in the different motors seems very similar. Possibly our wire is of higher grade as a possible reason.
We were not aware of possible motor damage during development of the SPX StockSpec, we tested it most with our X11 StockSpec motors of course but we also ran with SP and GM motors during development and didn't experience any motor failures.

@billy: The SXX doesn't have those extreme profiles as the SPX StockSpec, but the SXX's profiles 9 and 10 are for sure also suited very well for stock brushless motors.
As for the heatsink, I do think you get away without it in all the classes you mention except for Truck Mod.
__________________
Reto Koenig
burito is offline   Reply With Quote
Old 04-22-2009, 09:42 AM   #109
Tech Fanatic
 
Join Date: Oct 2003
Location: Planet Earth
Posts: 936
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by burito View Post
As for the comparison of the profiles between SPX StockSpec (#80710) and Sphere Competition (#80700) or Sphere Competition TC-Spec (#80750)

80700 vs. 80750:
- later batches of both models had identical profiles and hardware, only difference was the integrated heatsink/fan on 80750.
- earlier batches of 80700 (before 2007-edition came out and first batch of 2007-edition) had slightly different hardware but software was always identical.

profile difference between 80710 vs. 80700/80750:
- profiles 1-4 are identical on all speedos.
- 5-8 on 80710 are the real stock profiles, 7+8 are the extreme ones were you need much lower gearing.
- 5+6 on 80710 are actually fairly similar to 7+8 on 80700/80750 (but not identical)
This is some of the best info on this speed control yet. Wish it could be a sticky.
Tony Vega is offline   Reply With Quote
Old 04-22-2009, 10:36 AM   #110
Tech Regular
 
Join Date: Dec 2008
Posts: 459
Trader Rating: 9 (100%+)
Default

Quote:
Originally Posted by Tony Vega View Post
This is some of the best info on this speed control yet. Wish it could be a sticky.
Yes, I agree these are the most comprehensive and accurate info I have seen regarding the SPX Stock Spec. I have done a lot of research on the internet before purchasing and I have never seen such useful info. Good job Reto

I have another question regarding Profile 7 and 8 on SPX Stock Spec, and Profile 9 and 10 on SXX. Does these profile uses "dynamic" timing or fixed timing? Meaning does the timing get continuously adjusted based on users throttle actions? I heard that SPX Stock Spec has a "second gear" effect, with combination of good punch, which leads me to suspect the timing is not fixed. In fact, this was one of the main reason I purchased SPX over Tekin RS. Reto, can you please confirm this?
billythekid is offline   Reply With Quote
Old 04-22-2009, 01:33 PM   #111
Tech Addict
 
burito's Avatar
 
Join Date: Feb 2002
Location: Germany
Posts: 511
Default

Glad to hear the information I provided is useful.
We should definitely try to be online more here at rctech and answer your questions but I guess we're just too few guys for too many projects at the moment at LRP in Germany.

Anyway, will try to improve...

As for the timing question, I can't really disclose full details on our timing algorithm as we don't want it too easy for our competition...
But I can say that billythekids findings and statements are not wrong!
__________________
Reto Koenig
burito is offline   Reply With Quote
Old 04-22-2009, 01:42 PM   #112
Tech Regular
 
Join Date: Jul 2004
Location: North Bay
Posts: 485
Trader Rating: 10 (100%+)
Default

Good question Billy.

To add to the questions: I ran a 13.5 trinity duo with the spx and SMC 5200 lipo this weekend and tq'd. lap times are on par with all the other fast drivers, but I feel better lap times can be had at lower temps.

The track temp reached 131 F.

My spx temped at 135 F without heat sink.

My Duo temped at 180F +.

spx settings: 1,8,2,5. not sure exactly sure how to utilize the power setting.

I think this is too hot for the spx and duo.

The FDR was 4.95. Track size medium w/ front straight.

What temp ranges should I be aiming for with this combo.

I know there is much to take into consideration; I feel power setting, drag break and FDR are the most critical. I'm still trying to determine how and when the software is changing the timing on the motor.

Any input appreciated.

Cheerz
Obsidian is offline   Reply With Quote
Old 04-22-2009, 02:04 PM   #113
Tech Regular
 
Join Date: Jul 2004
Location: North Bay
Posts: 485
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by burito View Post
Glad to hear the information I provided is useful.
We should definitely try to be online more here at rctech and answer your questions but I guess we're just too few guys for too many projects at the moment at LRP in Germany.

Anyway, will try to improve...

As for the timing question, I can't really disclose full details on our timing algorithm as we don't want it too easy for our competition...
But I can say that billythekids findings and statements are not wrong!
With all due respect, I find the absence of at least some quantifiable info on spx timing software detremental to the user of the SPX. If I had a better idea of how the timing advancing software worked I could better utilize the spx for my racing applications. For example, if I knew where the timing was at 10%, 50% and 100% throttle, I could better integrate this with my driving style to utilize the max potential of my spx/motor combo. With this info, many using the spx could harness it's max potential for a particular application. love the product, hate being uniformed.

Cheerz
Obsidian is offline   Reply With Quote
Old 04-22-2009, 02:05 PM   #114
Tech Fanatic
 
SalvadoriRacing's Avatar
 
Join Date: Dec 2003
Location: Brazil, Sao Paulo
Posts: 928
Send a message via MSN to SalvadoriRacing Send a message via Skype™ to SalvadoriRacing
Default

Quote:
Originally Posted by Obsidian View Post
Good question Billy.

To add to the questions: I ran a 13.5 trinity duo with the spx and SMC 5200 lipo this weekend and tq'd. lap times are on par with all the other fast drivers, but I feel better lap times can be had at lower temps.

The track temp reached 131 F.

My spx temped at 135 F without heat sink.

My Duo temped at 180F +.

spx settings: 1,8,2,5. not sure exactly sure how to utilize the power setting.

I think this is too hot for the spx and duo.

The FDR was 4.95. Track size medium w/ front straight.

What temp ranges should I be aiming for with this combo.

I know there is much to take into consideration; I feel power setting, drag break and FDR are the most critical. I'm still trying to determine how and when the software is changing the timing on the motor.

Any input appreciated.

Cheerz
both esc and motor temps are ok.......

I just think you are using a lot auto brake and initial brake and I think motor temps would be even lower if you reduce these settings..........
__________________
Salvadori Racing
www.salvadoriracing.com.br

O.S. Engines - KM RACING - CONTACT TYRES - SAVOX - LRP - ARC | Blitz | Titan
SalvadoriRacing is offline   Reply With Quote
Old 04-22-2009, 02:48 PM   #115
Tech Regular
 
Join Date: Dec 2008
Posts: 459
Trader Rating: 9 (100%+)
Default

Quote:
Originally Posted by burito View Post
Glad to hear the information I provided is useful.
We should definitely try to be online more here at rctech and answer your questions but I guess we're just too few guys for too many projects at the moment at LRP in Germany.

Anyway, will try to improve...

As for the timing question, I can't really disclose full details on our timing algorithm as we don't want it too easy for our competition...
But I can say that billythekids findings and statements are not wrong!
Hi Reto, you can PM me. I promise I will not tell anyone else

I am your customer, not your competition. I can sign a non disclosure agreement with LRP if necessary
billythekid is offline   Reply With Quote
Old 04-22-2009, 05:01 PM   #116
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,762
Default

Quote:
Originally Posted by Obsidian View Post
With all due respect, I find the absence of at least some quantifiable info on spx timing software detremental to the user of the SPX. If I had a better idea of how the timing advancing software worked I could better utilize the spx for my racing applications. For example, if I knew where the timing was at 10%, 50% and 100% throttle, I could better integrate this with my driving style to utilize the max potential of my spx/motor combo. With this info, many using the spx could harness it's max potential for a particular application. love the product, hate being uniformed.

Cheerz
Stick in car, set to high profile, drop 2 pinions to allow for the extra rpm, thrash.

That's all you need to know apart from the rpm's appear 'normal' until full throttle is used.

You (all of us) didn't get any more info on timing's etc with their previous ESC's, and many others don't provide any information like that as well so I don't honestly see why your so desperate to know.

If you want an ESC that can be programmed to the 'n'th degree to allow you set everything there are a few out there.

Skiddins
__________________
Xray T4'18, T4'14 (Wet Car)
Xray X12 2018
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RCDisco.co.uk
Skiddins is offline   Reply With Quote
Old 04-22-2009, 06:14 PM   #117
Tech Regular
 
Join Date: Jul 2004
Location: North Bay
Posts: 485
Trader Rating: 10 (100%+)
Talking

Quote:
Originally Posted by Skiddins View Post
Stick in car, set to high profile, drop 2 pinions to allow for the extra rpm, thrash.

That's all you need to know apart from the rpm's appear 'normal' until full throttle is used.

You (all of us) didn't get any more info on timing's etc with their previous ESC's, and many others don't provide any information like that as well so I don't honestly see why your so desperate to know.

If you want an ESC that can be programmed to the 'n'th degree to allow you set everything there are a few out there.

Skiddins
I guess that's what I'll keep doing...I would never use anything else but LRP. I've seen too many other brands go pooooffff!!!.
Obsidian is offline   Reply With Quote
Old 04-22-2009, 06:21 PM   #118
Tech Master
 
Join Date: Jan 2005
Posts: 1,307
Default

Thanks for the info, I was looking for a good starting point.


Quote:
Originally Posted by The Wease View Post
On a track 100' x 60' I was at 3.92 fdr .Duo was set a 0 timing
spx settings were 1-7-2-2 motor was at 146 degrees after 6 minutes
__________________
Sponsored by mooby 64
outlandr91 is offline   Reply With Quote
Old 04-22-2009, 10:07 PM   #119
Tech Adept
 
Join Date: Apr 2008
Location: Melbourne, Australia
Posts: 237
Default

Will LRP post indicative dyno power/torque curves for the SPX used with the 10.5t stock spec motor (and 17.5t)? This would be very useful in choosing gearing and/or profile for different tracks. Even just knowing the shape of the power curve and where the peak is would be useful. I don't really want to try my 10.5t on #8 on the fantom dyno to find out the max revs, lol.

I basically use profile 8 all the time now and just gear down as needed based on temp. I found it is tough to choose between 1 pinion up and #7, or one pinion down and #8, although usually i find smaller pinion and #8 gives slightly better laptimes for rubber/asphalt but the temps are right on the limit (i can feel the motor losing punch near the end of the race).

For same gearing #8 always gives lower laptimes compared to #7 but again temps are higher.
gameover is offline   Reply With Quote
Old 04-23-2009, 02:22 AM   #120
Tech Regular
 
Join Date: Dec 2008
Posts: 459
Trader Rating: 9 (100%+)
Default

Quote:
Originally Posted by gameover View Post
Will LRP post indicative dyno power/torque curves for the SPX used with the 10.5t stock spec motor (and 17.5t)? This would be very useful in choosing gearing and/or profile for different tracks. Even just knowing the shape of the power curve and where the peak is would be useful. I don't really want to try my 10.5t on #8 on the fantom dyno to find out the max revs, lol.

I basically use profile 8 all the time now and just gear down as needed based on temp. I found it is tough to choose between 1 pinion up and #7, or one pinion down and #8, although usually i find smaller pinion and #8 gives slightly better laptimes for rubber/asphalt but the temps are right on the limit (i can feel the motor losing punch near the end of the race).

For same gearing #8 always gives lower laptimes compared to #7 but again temps are higher.
What brand is your 10.5T? I think different motor may react differently with SPX since they have different default hardware timing.
billythekid is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
LRP SXX TC SPEC Stein Tumert Electric On-Road 190 08-20-2012 05:52 AM
10.5 Setups matrix101 Australian Racing 14 06-05-2009 03:27 AM
LRP SPX and TC-SPEC Tral Radio and Electronics 15 04-21-2009 06:07 PM
LRP SPX Brushless Competition StockSpec ESC mazmo Australian Racing 10 02-16-2009 12:44 PM
LRP SPX Bullet Revise Burshless/Brush ESC chappi Australia For Sale/Trade 15 12-31-2008 08:29 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 09:23 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net