R/C Tech Forums

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

    Hide Wikipost
Old 10-28-2016, 12:43 PM   -   Wikipost
R/C Tech Forums Thread Wiki: 1/12 forum
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
Last edit by: fenton06
This is a place to share knowledge related to 1/12th scale racing. It is not to be used for conversations.

KITS:
Click links to go to manufacturer product page. If any are missing please add them!

TIRES:
Pre-mounted tires readily available in the US:
Pre-mounted tires readily available in the Europe:
  • Hot Race ??

Gluing your own donuts:
https://www.youtube.com/watch?v=hm7z1rz-74s - Special thanks to Edward Pickering!
Truing tires:
https://www.youtube.com/watch?v=8wqHOLWq6Uc - Special thanks to Edward Pickering!

The following information came from HERE, with some editing and information added. Thanks Christian!

THIS MAY NEED UPDATING FOR THE NEW BLACK CRC CARPET

Brands:
BSR, CRC, Jaco:
Pro One is no longer selling to the public, but it and the brands above are all mounted by BSR and use the same foam. The nomenclature of the BSR vs Jaco/CRC is a little different in a few instances but is otherwise the same. The BSR foam consists of three families, and can be identifed as synthetics, naturals, and blends.

Synthetics - The old school, light weight, easy to true "dry feeling" tires. These include tires like CRC/Jaco Yellow (BSR White), Black, Gray, etc. These tires offer the highest wear rate and lowest grip. Many racers continue to use these nder high bite conditions.

Naturals - These tires are usually the best alternative for low bite and asphalt. They include Pink, Magenta, Double Pink, Lilac (BSR Team Purple), Purple, and other tires. These tires provide a ton of grip, but tend to get sticky in high bite conditions. This rubber does not wear as easily, and the cars will pick up gunk and fibers from the carpet under most high bite conditions. This is especially bad if the humidity is high.

Blends - These are the tires most people run today. They were initially called "JFT foam" by some, as it was believed that the tires were the same as the JFT tires. We can divide the blends further into two groups: high rubber and low rubber content. The high rubber would be the new rear Orange and Red from the BSR family, and the low rubber would be the Green and Blue varieties. When, asked about the difference, John Foister from BSR Tires said they came from the same "family" of foam, but they offered different grip. According to John, the Green/Blue has more bite than Orange/Red, but from track testing Oranges offer more bite than Green (being equivalent to in hardness) when the grip is high and absolutely no grip when it is lower. The Orange foam has a denser pore structure and the tire is not as prone to chunking. It is also important to note is that BSR Blue rears are not the same as the BSR Blue fronts!

JFT:
JFT stands for Japan Foam Tire. They started the new wave of foam tires we are all using now (Blue/Blu, Green/Greene, Dbl Blue, etc). These tires are a little different than the BSR tire family, but work in very similar conditions. They offers four varieties A (asphalt), C (carpet), S (???), and R (???). This does not mean that those types only work on that surface, but this is what they recommend.

JFT uses the same foam for fronts and rears if the color is the same.

A: Used on asphalt, considered close to the natural rubber variety and are named consistently with other natural tires.
C: Used on carpet, considered a blend.
S: Used on carpet?, tires are ???
R: Used on carpet?, tires are ???

For setup, the JFT foam seem to generate more bite than the BSR, therefore the car tends to be a little more aggressive.

Ulti:
Ulti is another Japanese brand that offers an array of compounds. They have their own way of rating tires, and are difficult to equate to other brands. They have 4 different varieties, each in varying degrees of hardness.

J: High rubber content tire, similar to Pink/ Magenta. Soft would be close to a pink. These offer the most bite and are great for asphalt/carpet front tire. (J hard being very popular)
X: "Balanced" blend, similar to JFT Blue/ Green. Soft is equivalent to Green, medium to Blue in hardness. Great for carpet!
Y: High synthetic blend with lower grip, and is not a very popular variety.
Z: A very expensive "special" foam that is supposed to be magic on asphalt. Only make it in soft shore.
European tires:
There are many great European foam tire brands that use their own types of foam, as well as traditional foams. SOmeone with more knowledge about them will need to fill this in!

Tire Diameter:
If you are racing on carpet, you have to evaluate how much grip your track has. If your track is low to medium grip, you can run bigger tires. If you are on higher bite you have to cut them smaller, there is simply no way around it. Bigger tires are needed for asphalt, especially in the rear. The larger tires provide much needed lateral bite.

Carpet (mm):
Low - Medium Bite
Front: 42.0 - 42.5
Rear: 42.5 - 43.00
Medium - High Bite
Front: 40.5 - 41.0
Rear: 41.5 - 42.0
Big Race
Front: 39.5 - 40.0
Rear: 40.5 - 41.0
Asphalt (mm):
Parking Lot
Front: 43.0 - 44.0
Rear: 44.0 - 45.0
Prepped High Bite
Front: 42.0 - 43.0
Rear: 43.0 - 44.0

Tire Saucing:
Most facilities have moved towards odorless traction additives such as SXT. Some of additives evaporate very quickly and some do not. This seems to be something that is also dependent on tire compound and ambient temperature. For example, saucing a Green compound seems like it never dries, especially when tjhe temperature is lower. We have found that wiping the tires off 15 minutes before we go run allows the sauce to cure, which makes the car come in much quicker with Green rears. Blue compounds on the other hand, do fine when wiped off right before hitting the track.

Saucing half front and full rear is a good initial starting point. If the front of the car is too agressive you can sauce les than half, or for a shorter amount of time.
Tire Fuzzing:
In conditions of increasing grip, foam tires will somewtimes get sticky and pick up fuzz and debris from the track. This is highly dependent on the rubber sedan tire that is being run at your local track and the compound/ type of foam you are running on you car. The softer the sedan tire and the harder/higher rubber content in your foam tire, trouble with fuzzing seems more likely to occur.

There are ways to get around fuzzing under most conditions, and usually involves the selection of the correct foam compound. The more fuzz you get, the softer/lower rubber content you want to run.

Examples:
Problem: Car fuzzes with Lilac/Team Purple fronts and car starts pushing.
Solution: Use a softer front tire and or different family of foam. Replace it with Blue or Double Blue front.

Problem: Car loses rear bite 6 minutes into the run. Blue rear tires look almost clean but have small carpet hairs.
Solution: Use Green rear tires. The softer compound wears instead of getting sticky, minimizing fuzz.

Tire Selection:
Starting out, pick 2 tire compounds for the front and rear. The following should have you covered 99% of the time.

Front - Green and Blue (BSR) or Green and Light Blue (JFT)
Rear - Blue and Double Blue (BSR) or Blue and Dark Blue (JFT)

You may wonder about other compounds out there and if they might be better, trust me, they probably won't be. Even if there are other tires that can be as fast, the synthetic family wears out really fast and the high natural rubber will probably fuzz on you over an 8 minute run. The blends family seems to be the most versatile foam type available today. They last awhile, and sticking to them will make your process of tire selection simpler.
Tire Charts:
BSR/CRC/Jaco



Contact



Corally



JFT (Japan Foam Tire)



Ulti



Enneti (Xceed)



ELECTRONICS:
ESC:
As of now, ROAR is staying 1S (3.7V nominal; 4.2V fully charged) for 1/12. There are many 1S ESC's with a built in BEC so nothing else is required to power the receiver and servo.

If you don't want to lock yourself into a 1S specific ESC, you do have other options! It is possible to use your 2S ESC without a booster or receiver pack, and the ESC simply supplies the lower voltage. If that does not appeal to you, you will need to use an Rx pack or booster. The Rx pack and booster will both supply the receiver with a higher voltage than the 1S pack.

If you decide to use an Rx pack, MAKE SURE TO REMOVE THE RED WIRE FROM THE ESC PLUG THAT GOES INTO THE RECEIVER!!!

If you choose to use a voltage booster, it works exactly how it sounds. Instead of plugging the ESC into the receiver, it plugs into the booster, and the booster plug goes to the ESC, supplying the higher voltage.

1S ESC:
If there are any missing please add them!!

If anyone would like a need for a chart comparing the ESC's specs PM fenton06 and I'll get one made and put in here!
Voltage Boosters:
If there are any missing please add them!
Servos:
BODIES:
Black Art (CRC - US Dist):
  • Audi R8C - BA002 - .020 Thick



  • Black Market (Mohawk 12) - BA005 - .020



  • Lola B10 - BA006 - .020 thick
  • Toyota TS030 - BA008 - .020 thick

    Lola - black/red, TS030 - green/pink


PROTOForm:

Reflex Racing/RSD:

SUSPENSION ADJUSTMENTS:

Print Wikipost

Reply
 
Thread Tools Search this Thread
Old 02-17-2009, 11:15 AM   #30781
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,636
Trader Rating: 21 (100%+)
Default

Makes perfect sense to me. Unfortunately I do not know the answer.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 02-17-2009, 07:47 PM   #30782
Tech Master
 
superspeed's Avatar
 
Join Date: Feb 2007
Posts: 1,148
Trader Rating: 5 (100%+)
Default

Quote:
Originally Posted by ovalnator View Post
This is a continuation of the thread from the other site. Post anything about 1/12 here, setups, whatever.
over 1,301,115 views since first post, is 1/12 racing really big now? I used to race 1/12 back in mid and late 90s, but TC took over when ROAR & IFMAR started sedan class.
superspeed is offline   Reply With Quote
Old 02-17-2009, 08:42 PM   #30783
Tech Master
 
cheehtae's Avatar
 
Join Date: Apr 2005
Posts: 1,470
Trader Rating: 15 (100%+)
Default

Anyone knows where I can find a 1sp lipo?
cheehtae is offline   Reply With Quote
Old 02-17-2009, 08:58 PM   #30784
Tech Elite
 
Grenade10's Avatar
 
Join Date: Nov 2003
Location: Fort Collins, Colorado
Posts: 4,667
Trader Rating: 37 (100%+)
Default

Quote:
Originally Posted by cheehtae View Post
Anyone knows where I can find a 1sp lipo?
SMC - Stormer
__________________
Darkside, Sweep, BSR, Fantom, IGT Hobbies and IGT8
Byrons Fuel, ProtoForm Bodies & Futaba Radio Gear by Choice
Founding Member of CORRC .... 5280raceway
www.darksidems.com www.igthobbies.com www.IGT8.com
Grenade10 is offline   Reply With Quote
Old 02-17-2009, 09:06 PM   #30785
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,659
Trader Rating: 85 (99%+)
Default

Quote:
Originally Posted by superspeed View Post
over 1,301,115 views since first post, is 1/12 racing really big now? I used to race 1/12 back in mid and late 90s, but TC took over when ROAR & IFMAR started sedan class.

Depends on the area, here(5th largest city in the US) we struggle to get 3 or four on race days. Other parts of the country its very well attented
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 02-18-2009, 04:48 PM   #30786
Tech Elite
 
Slapmaster6000's Avatar
 
Join Date: Sep 2004
Location: Edmonds, Wash.
Posts: 2,947
Trader Rating: 14 (100%+)
Default

Hey guys, I got a chance to try the new LRP SPX this past weekend. I was on a fairly big track at 60x100 with a sweep on and off. I ran the Tri Duo at 10* time with the Sphere Comp rolled at 75mm which was plenty fast. I dropped the SPX in, geared down to a 67mm r/o, timed the motor at 0* & punch mode #7 as per some prior recommendations. It sounded like it was going to blow the foam off the wheels! But on the track, it did not impress me at all. I geared down two more teeth and it was about the same speed. I changed it over to mode #5 & #6 which seemed to take that radical active timing away from the profile. With the motor timed back up to 10*, r/o at 75mm in mode #5, it was basically the same as Comp. I totally struck out with the active timing profile. Anyone have a better recipe for 4 cell 13.5?

The guys said they sold like a million and half of these things at Birds, so someone had them figured out!

Brian
__________________
Stay dialed my friends!
www.slapmastertools.com
Team Roche USA
Team Orca orcharc.com
Slapmaster6000 is offline   Reply With Quote
Old 02-18-2009, 05:53 PM   #30787
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,157
Default

That is interesting...Most of the run on ESCs I saw at the Birds were on the Tekin RS with the motor timing at 0 and the boost timing maxed out. Not saying it didn't happen with the LRP too..I just didn't see it. The buzz around the pits I was at was the Tekin.
InspGadgt is offline   Reply With Quote
Old 02-18-2009, 05:58 PM   #30788
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,659
Trader Rating: 85 (99%+)
Default

Quote:
Originally Posted by Slapmaster6000 View Post
The guys said they sold like a million and half of these things at Birds, so someone had them figured out!
Quote:
Originally Posted by InspGadgt View Post
That is interesting...Most of the run on ESCs I saw at the Birds were on the Tekin RS with the motor timing at 0 and the boost timing maxed out. Not saying it didn't happen with the LRP too..I just didn't see it. The buzz around the pits I was at was the Tekin.
Sounds like marketing talk to me
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 02-18-2009, 06:01 PM   #30789
Tech Elite
 
Bob-Stormer's Avatar
 
Join Date: Dec 2001
Location: Glasgow, Montana USA
Posts: 3,512
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by Slapmaster6000 View Post
Hey guys, I got a chance to try the new LRP SPX this past weekend. I was on a fairly big track at 60x100 with a sweep on and off. I ran the Tri Duo at 10* time with the Sphere Comp rolled at 75mm which was plenty fast. I dropped the SPX in, geared down to a 67mm r/o, timed the motor at 0* & punch mode #7 as per some prior recommendations. It sounded like it was going to blow the foam off the wheels! But on the track, it did not impress me at all. I geared down two more teeth and it was about the same speed. I changed it over to mode #5 & #6 which seemed to take that radical active timing away from the profile. With the motor timed back up to 10*, r/o at 75mm in mode #5, it was basically the same as Comp. I totally struck out with the active timing profile. Anyone have a better recipe for 4 cell 13.5?

Brian
remember back when you could simply get a recommendation on rollout and it was fine? *sigh*

__________________
www.stormerhobbies.com "Where the world shops for radio control."
www.facebook.com/stormerhobbies
www.twitter.com/stormerhobbies

looking for....vintage 1/10-1/12 pan, need Schumacher 1/12th cars and parts.
Bob-Stormer is offline   Reply With Quote
Old 02-18-2009, 06:02 PM   #30790
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,157
Default

Well realize also that I run a Tekin RS so may have only been included in those conversations and missed out no the LRP ones. But I did see a number of cars switch to Tekin RS ESCs.
InspGadgt is offline   Reply With Quote
Old 02-18-2009, 06:17 PM   #30791
Tech Elite
 
Slapmaster6000's Avatar
 
Join Date: Sep 2004
Location: Edmonds, Wash.
Posts: 2,947
Trader Rating: 14 (100%+)
Default

Quote:
Originally Posted by Bob-Stormer View Post
remember back when you could simply get a recommendation on rollout and it was fine? *sigh*

Now I have some voodoo sauce for cleaning the tires instead of using motor spray!

What happened to the Yokomo 05 motor that I plugged a set of $1 brushes into every 6 months that I used in '85? Oh yea, the bushing wore out!

I am going online to see if my local community college offers degrees in advanced rc. I am feeling a little left behind.
__________________
Stay dialed my friends!
www.slapmastertools.com
Team Roche USA
Team Orca orcharc.com
Slapmaster6000 is offline   Reply With Quote
Old 02-18-2009, 06:18 PM   #30792
Team EAM
 
EAMotorsports's Avatar
 
Join Date: Dec 2001
Location: Murfreesboro, TN
Posts: 8,862
Trader Rating: 73 (100%+)
Send a message via AIM to EAMotorsports
Default

Quote:
Originally Posted by InspGadgt View Post
That is interesting...Most of the run on ESCs I saw at the Birds were on the Tekin RS with the motor timing at 0 and the boost timing maxed out. Not saying it didn't happen with the LRP too..I just didn't see it. The buzz around the pits I was at was the Tekin.
I know the hobbyshop sold 50 of the between Friday and Tues before the race. Got another 30 in on Weds and 10 on Friday and all or most sold before the week was over. There were quite a few Tekins sold to though....I helped push a few while I was in there with Robbie and Mike.

EA
__________________
Contact Us
Team EAM, Our Facebook
Xray | RCAmerica | Hudy | Apex RC | ProSpec America | Killer Concepts | AVID | Futaba.
EAMotorsports is offline   Reply With Quote
Old 02-18-2009, 06:18 PM   #30793
Tech Fanatic
 
Join Date: Nov 2006
Location: St. Louis, MO
Posts: 904
Trader Rating: 23 (100%+)
Default

Quote:
Originally Posted by Slapmaster6000 View Post
Hey guys, I got a chance to try the new LRP SPX this past weekend. I was on a fairly big track at 60x100 with a sweep on and off. I ran the Tri Duo at 10* time with the Sphere Comp rolled at 75mm which was plenty fast. I dropped the SPX in, geared down to a 67mm r/o, timed the motor at 0* & punch mode #7 as per some prior recommendations. It sounded like it was going to blow the foam off the wheels! But on the track, it did not impress me at all. I geared down two more teeth and it was about the same speed. I changed it over to mode #5 & #6 which seemed to take that radical active timing away from the profile. With the motor timed back up to 10*, r/o at 75mm in mode #5, it was basically the same as Comp. I totally struck out with the active timing profile. Anyone have a better recipe for 4 cell 13.5?

The guys said they sold like a million and half of these things at Birds, so someone had them figured out!

Brian
Quote:
Originally Posted by Bob-Stormer View Post
remember back when you could simply get a recommendation on rollout and it was fine? *sigh*

I think he just needs a stiffer spring on the positive side and slot the brushes. Roll out seems fine.
SteveL is offline   Reply With Quote
Old 02-18-2009, 06:59 PM   #30794
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,157
Default

Quote:
Originally Posted by EAMotorsports View Post
I know the hobbyshop sold 50 of the between Friday and Tues before the race. Got another 30 in on Weds and 10 on Friday and all or most sold before the week was over. There were quite a few Tekins sold to though....I helped push a few while I was in there with Robbie and Mike.

EA
Well like I said...I probably wasn't privy to those conversations/sales. I didn't spend much time in the hobby shop other to buy spurs and pinions. Most of the Tekin craziness I saw was well after the race had started...must have been part way throught the 2nd day of qualifying. By then there were very few left and people were scrambling to find some. Or at least that is how it seemed.
InspGadgt is offline   Reply With Quote
Old 02-18-2009, 09:48 PM   #30795
Tech Elite
 
Grenade10's Avatar
 
Join Date: Nov 2003
Location: Fort Collins, Colorado
Posts: 4,667
Trader Rating: 37 (100%+)
Default

Quote:
Originally Posted by InspGadgt View Post
Well like I said...I probably wasn't privy to those conversations/sales. I didn't spend much time in the hobby shop other to buy spurs and pinions. Most of the Tekin craziness I saw was well after the race had started...must have been part way throught the 2nd day of qualifying. By then there were very few left and people were scrambling to find some. Or at least that is how it seemed.
Some of us had traveled with them in the cars plus some spares and I even sold one of my spares before the week was out.

I would say that not all the motors worked the best with this set up. It did work with the 17.5 DUO in 1/12 scale, but I was faster with a little less in the WGT and 13.5. 21.5 oval was almost half of the 1/12 scale.
__________________
Darkside, Sweep, BSR, Fantom, IGT Hobbies and IGT8
Byrons Fuel, ProtoForm Bodies & Futaba Radio Gear by Choice
Founding Member of CORRC .... 5280raceway
www.darksidems.com www.igthobbies.com www.IGT8.com
Grenade10 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
New to the forum mig rod Electric Off-Road 1 01-05-2008 05:23 PM
hi i need help and im new to the forum racer4 Rookie Zone 4 01-21-2007 02:37 PM
Why is this forum listed under the On Road Forum? sport10 Onroad Nitro Engine Zone 0 01-11-2007 08:06 AM
Forum Changes... futureal Wisconsin & Illinois Racing 3 10-28-2002 09:26 PM



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 05:10 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net

SEO by vBSEO 3.5.0