R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 09-03-2009, 05:26 AM   #616
Tech Addict
 
auzzy_mate's Avatar
 
Join Date: Jul 2008
Location: MIA Awesome Mansion
Posts: 703
Trader Rating: 5 (100%+)
Default 17.5 gearing

Quote:
Originally Posted by HI_808 View Post
I think I finally found the sweet spot for my 17.5 SP Ultrasportsman on the SPX. With a SMC lipo, I'm running a 4.07 FDR on profile seven and it comes off the track in six minutes at about 155 F in ~90 F ambient temps....
Im really torn. I run a SP17.5 (no timing adjustments) with my SPX (profile 7), and have had the car set at 3.4 FDR for the last 2 race meets and have been doing consistant times compared to my 2007 Sphere on profile 6. I do notice an increased aggression, but it is only minor.

Should I gear down to say 3.6-3.7 and see if i can get the turbo to kick in and I can also get more punch out of the car?

Our track is large (225m total) with a 1/2 hairpins 1/2 half speed corners.

Ben
auzzy_mate is offline   Reply With Quote
Old 09-03-2009, 06:21 AM   #617
Tech Elite
 
M-Technic's Avatar
 
Join Date: Sep 2007
Location: Palm Beach, FL
Posts: 2,562
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by auzzy_mate View Post
Im really torn. I run a SP17.5 (no timing adjustments) with my SPX (profile 7), and have had the car set at 3.4 FDR for the last 2 race meets and have been doing consistant times compared to my 2007 Sphere on profile 6. I do notice an increased aggression, but it is only minor.

Should I gear down to say 3.6-3.7 and see if i can get the turbo to kick in and I can also get more punch out of the car?

Our track is large (225m total) with a 1/2 hairpins 1/2 half speed corners.

Ben
I think you will find the car to be faster if you gear down. Most local racers are running a 3.75-4.0 final drive in 17.5 if they are using profile 7-8. Of course that depends on a lot of other variables! But I suspect your motor is not winding out all the way with a 3.4 FDR.
__________________
RCAmerica | Xray | Hudy | Radiopost | Speed Passion USA | Trinity | P3 Graphics
M-Technic is offline   Reply With Quote
Old 09-04-2009, 12:01 AM   #618
Tech Addict
 
auzzy_mate's Avatar
 
Join Date: Jul 2008
Location: MIA Awesome Mansion
Posts: 703
Trader Rating: 5 (100%+)
Default 17.5 Gearing

Quote:
Originally Posted by M-Technic View Post
I think you will find the car to be faster if you gear down. Most local racers are running a 3.75-4.0 final drive in 17.5 if they are using profile 7-8. Of course that depends on a lot of other variables! But I suspect your motor is not winding out all the way with a 3.4 FDR.
I have some time off next week in Western Australia so I will be able to do some testing on the big Nitro Track they have (50m+ straight).

I will run profile 7, FRD 4.0 then 3.9 down to 3.4 and see how the times and temps compare.

I run the big LRP fan in hotter conditions when the temperatures get above 25degrees celcius (70-80f) to keep my junk kooler.

Ben
auzzy_mate is offline   Reply With Quote
Old 09-04-2009, 01:35 AM   #619
Tech Regular
 
HI_808's Avatar
 
Join Date: Apr 2007
Posts: 359
Default

My initial impression is that you are geared too high but I would definitely try to experiment and see what happens. My track is much smaller than yours so my set up may not work for you. Let us know what happens.
HI_808 is offline   Reply With Quote
Old 09-06-2009, 05:47 AM   #620
Tech Master
 
Benzaah's Avatar
 
Join Date: Feb 2008
Location: Australia
Posts: 1,991
Trader Rating: 21 (96%+)
Default

Today i ran between a 28 and a 34 tooth pinion on profile 7 and middle hole timing on a Ion 2 17.5. I found my fastest laps were coming with the 31 tooth even though it was heaps faster with the bigger pinions it was just too fast and the brakes and punch out of the corners and up the hills were heaps better with the smaller pinion. Temps started maxing out around 185f at 34 tooth so i did not go any higher obviously. Anything under 28 was not fast enough.
__________________
Adelaide RC - XRAY Xb216de & Xb416

Walter Rc Hobby - Serpent 4X

Nosram - R1wurks - Sanwa - Hudy - Muchmore
Benzaah is offline   Reply With Quote
Old 09-06-2009, 05:47 PM   #621
Tech Elite
 
BlackedOutREVO's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2007
Location: CA
Posts: 3,791
Trader Rating: 67 (100%+)
Default

Well I came to a pretty dang good set up. I ended up at about 6.1 FDR, profile 8, 13.5 duo 1 middle hole, and a SMC 4K 28C. I also ran the same set up with a Novak motor with timing full and they were both fast. The duo has some power over the novak, but the novak worked pretty good. At speed world (173 foot straight) Both motors come off at around 150-160 after 6 mins. Awesome infield and straight speed
__________________
R1 Wurks/Awesomatix USA/Roche USA/Protoform/Solaris/Mo Speed/Speedworld Raceway
BlackedOutREVO is offline   Reply With Quote
Old 09-06-2009, 07:06 PM   #622
Tech Master
 
Join Date: Jan 2005
Posts: 1,307
Default

Today was my first day experimenting with the SPX and I have some questions.
The track is 40x80,the motor is a Duo with the timing @ zero,I ended up on profile #7 and a 4.94 fdr.The temp was 110 degrees after 5 minutes.
Am I gearing it right? Should I mess with the timimg? Thanks
__________________
Sponsored by mooby 64
outlandr91 is offline   Reply With Quote
Old 09-06-2009, 07:13 PM   #623
Tech Master
 
adamge's Avatar
 
Join Date: Sep 2006
Location: Saskatoon,SK Canada
Posts: 1,654
Trader Rating: 1 (100%+)
Default

You didn't actually say what motor you are using, but no, 110degF is too low.
__________________
When someone is intent on excelling in an otherwise laudable manner, does he not desire to inflict pain on others by means of his exalted status and enjoy the envy he arouses? Is there not an anticipated delight in an artist's ability to defeat his artistic rivals, which heightens his euphoria in creation?
-Nietzsche
adamge is offline   Reply With Quote
Old 09-06-2009, 11:36 PM   #624
Tech Champion
 
Still Bill's Avatar
 
Join Date: Jan 2004
Location: Reno, NV
Posts: 7,237
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by BlackedOutREVO View Post
Well I came to a pretty dang good set up. I ended up at about 6.1 FDR, profile 8, 13.5 duo 1 middle hole, and a SMC 4K 28C. I also ran the same set up with a Novak motor with timing full and they were both fast. The duo has some power over the novak, but the novak worked pretty good. At speed world (173 foot straight) Both motors come off at around 150-160 after 6 mins. Awesome infield and straight speed
Does that 173 foot straight include the pits or something???
__________________
Constantly evolving CRC WGT and WGT-R/T...Carpet & Asphalt...All thanks to Team CRC.

And a pair of Associated B6 buggies for turf and clay tracks.
Still Bill is offline   Reply With Quote
Old 09-06-2009, 11:44 PM   #625
Tech Elite
 
BlackedOutREVO's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2007
Location: CA
Posts: 3,791
Trader Rating: 67 (100%+)
Default

Quote:
Originally Posted by Still Bill View Post
Does that 173 foot straight include the pits or something???
Lol thats what it is isnt it?

I think
__________________
R1 Wurks/Awesomatix USA/Roche USA/Protoform/Solaris/Mo Speed/Speedworld Raceway
BlackedOutREVO is offline   Reply With Quote
Old 09-07-2009, 03:59 AM   #626
Tech Master
 
Benzaah's Avatar
 
Join Date: Feb 2008
Location: Australia
Posts: 1,991
Trader Rating: 21 (96%+)
Default

Quote:
Originally Posted by outlandr91 View Post
Today was my first day experimenting with the SPX and I have some questions.
The track is 40x80,the motor is a Duo with the timing @ zero,I ended up on profile #7 and a 4.94 fdr.The temp was 110 degrees after 5 minutes.
Am I gearing it right? Should I mess with the timimg? Thanks
Try middle hole timing but drop an extra pinion tooth just in case it gets a bit hot.
__________________
Adelaide RC - XRAY Xb216de & Xb416

Walter Rc Hobby - Serpent 4X

Nosram - R1wurks - Sanwa - Hudy - Muchmore
Benzaah is offline   Reply With Quote
Old 09-07-2009, 10:23 AM   #627
Tech Fanatic
 
jrxs-r's Avatar
 
Join Date: May 2007
Location: Perth, Western Australia
Posts: 831
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by auzzy_mate View Post
I have some time off next week in Western Australia so I will be able to do some testing on the big Nitro Track they have (50m+ straight).

I will run profile 7, FRD 4.0 then 3.9 down to 3.4 and see how the times and temps compare.

I run the big LRP fan in hotter conditions when the temperatures get above 25degrees celcius (70-80f) to keep my junk kooler.

Ben
Heya Ben,

At the state titles, the boys were running an FDR of around 3.4-3.6 with the Sphere TC-Spec... so I think starting out at around 4.0 should be pretty good.
__________________
Cheers,
Zack
___________________________________________________________________________
Proudly Sponsored by Stanbridges Hobbies
Serpent S411
jrxs-r is offline   Reply With Quote
Old 09-07-2009, 12:27 PM   #628
Tech Regular
 
Join Date: Mar 2003
Location: UK,the sunny north
Posts: 329
Default

What speedo do you guys recommend spx sxx or sxx tc am running world gt with 1s 3.7v but running mod outdoors and 10.5 indoors, but mainly mod outdoors?

Cheers
jas1 is offline   Reply With Quote
Old 09-07-2009, 01:59 PM   #629
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,763
Default

Quote:
Originally Posted by jas1 View Post
What speedo do you guys recommend spx sxx or sxx tc am running world gt with 1s 3.7v but running mod outdoors and 10.5 indoors, but mainly mod outdoors?

Cheers
Tekin RS Pro.

The SPX is the ESC to have for Stock classes in TC but the lower voltage stops the extra timing from doing anything usefull.
I would go for the Tekin RS Pro as the turbo feature actually works with 1s.

Skiddins

P.S. I have owned and run both in GT10
__________________
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 09-07-2009, 02:15 PM   #630
Tech Master
 
Verndog's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jun 2007
Location: PPDBillet.com USA
Posts: 1,845
Trader Rating: 16 (100%+)
Default

Quote:
Originally Posted by Skiddins View Post
Tekin RS Pro.

The SPX is the ESC to have for Stock classes in TC but the lower voltage stops the extra timing from doing anything usefull.
I would go for the Tekin RS Pro as the turbo feature actually works with 1s.

Skiddins

P.S. I have owned and run both in GT10
I've been running 13.5 in my TC5 and switched to 17.5 a week ago because of low turn out. I noticed I was out motored by over half the racers running with my older 2007 Sphere comp (with Duo and SMC 40c 5200). Is the difference in gain in the SPX (from sphere comp) running both 17.5 and 13.5 noticeable enough to make much difference...or more like bearly noticeable??
__________________
--->Dial-a-Grip for TC6
Kevin -- PPDBillet---TC6---Exoray 008
---Team Hoarders---
Verndog 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 08:13 AM.


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