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 09-10-2006, 12:01 PM   #20446
Super Moderator
 
Marcos.J's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2003
Location: Semper Fi
Posts: 25,177
Trader Rating: 140 (100%+)
Default

Quote:
Originally Posted by odpurple
Thanks very much, guys

Marcos, you'll have to agree it is a slightly different design philosophy

here's the car we'll be running at Vegas:
looks the same but its shorter, narrower and stiffer
Marcos.J is offline   Reply With Quote
Old 09-10-2006, 12:54 PM   #20447
Tech Addict
 
Thraex's Avatar
 
Join Date: Nov 2004
Posts: 518
Default

I just switched from 1/12th to TC's, but if I see things like this I wonder if I made the right choice...
The car looks great and I saw on the website you're offering some nice building services, it all looks promising.
__________________
Thijs van M[HPI/HB]
Thraex is offline   Reply With Quote
Old 09-10-2006, 01:24 PM   #20448
Tech Elite
 
Join Date: Nov 2001
Location: SF Bay Area
Posts: 3,455
Trader Rating: 28 (100%+)
Default

Quote:
Originally Posted by odpurple
Thanks very much, guys

Marcos, you'll have to agree it is a slightly different design philosophy

here's the car we'll be running at Vegas:
looks the same but its shorter, narrower and stiffer
Nice.
__________________
Team I'm Over It
racenut123 is offline   Reply With Quote
Old 09-10-2006, 01:58 PM   #20449
Tech Champion
 
JayBee's Avatar
 
Join Date: Mar 2004
Location: 12TH-MAN COUNTRY
Posts: 6,803
Trader Rating: 31 (100%+)
Default

Quote:
Originally Posted by odpurple
Thanks very much, guys

Marcos, you'll have to agree it is a slightly different design philosophy

here's the car we'll be running at Vegas:
looks the same but its shorter, narrower and stiffer
Very-VERY Nice!!! You know what that means don't ya ...
__________________
R C 3 G R A F I X _ F U S I O N . G R A P H I X _ S E A T T L E - R/C - R A C E R S _ E M E R A L D C I T Y R C . C O M

A E - 12R5.2 _ S M - REV8 PRO
JayBee is offline   Reply With Quote
Old 09-10-2006, 03:02 PM   #20450
TFR
Tech Master
 
TFR's Avatar
 
Join Date: Aug 2001
Location: Toronto
Posts: 1,767
Trader Rating: 11 (100%+)
Default

Since everybody is posting their 1/12th. Here is my AH12 that I will be using this winter on carpet. Not yet finish.
Attached Thumbnails
1/12 forum-cimg1359.jpg   1/12 forum-cimg1367.jpg   1/12 forum-cimg1362.jpg  
__________________
Muchmore l AHRP l Xenon l Futaba
TFR is offline   Reply With Quote
Old 09-10-2006, 06:20 PM   #20451
P2
Tech Fanatic
 
P2's Avatar
 
Join Date: Aug 2003
Location: Oahu, Hi
Posts: 865
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by odpurple
here's the car we'll be running at Vegas:
looks the same but its shorter, narrower and stiffer
OD, Carpet version looks good! I'll need a carpet car too, let me know when they will be available! Here is my OD12 w/disk instead of side tubes.
Good luck in Vegas!
P2
Attached Thumbnails
1/12 forum-od12.jpg  
__________________
TopRacingUSA | Team EPIC | Thunder Power | OD Racing
P2 is offline   Reply With Quote
Old 09-10-2006, 07:49 PM   #20452
Tech Champion
 
TimPotter's Avatar
 
Join Date: Sep 2001
Location: Boynton Beach Fl > Randoph NJ
Posts: 7,481
Trader Rating: 14 (100%+)
Send a message via AIM to TimPotter
Default

Since everyone else is sharing... My BMI DB12 . Car just gets better every time I run it...
__________________
Clean Title & Escrow|p3|TRF|Tamiya|SerpentAmerica|FSEARA|Team Butter|RC 3|Munno |RCTECH #29|EAMotorsports|BMI|Novak|SpeedPassion|RadioPost

Last edited by TimPotter; 07-16-2008 at 08:08 PM.
TimPotter is offline   Reply With Quote
Old 09-10-2006, 09:30 PM   #20453
Tech Master
 
alana07's Avatar
 
Join Date: Oct 2001
Location: There
Posts: 1,814
Trader Rating: 52 (100%+)
Send a message via MSN to alana07
Default

i'm currently running a CRC 3.2r on a asphalt track. so which front upper arm holder is recommended, the angled or flat unit? and why? thanks.
__________________
没有最好,只有更好!!!
alana07 is offline   Reply With Quote
Old 09-10-2006, 09:38 PM   #20454
Super Moderator
 
Marcos.J's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2003
Location: Semper Fi
Posts: 25,177
Trader Rating: 140 (100%+)
Default

Quote:
Originally Posted by TimPotter
Since everyone else is sharing... My BMI DB12 . Car just gets better every time I run it...
very nice Tim!
Marcos.J is offline   Reply With Quote
Old 09-10-2006, 10:23 PM   #20455
Tech Addict
 
RaceBucks's Avatar
 
Join Date: Sep 2005
Location: Huntington Beach, Ca.
Posts: 512
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by Justinian
... Has anyone on this forum used a ... lipo in a 12th scale?? ... Does the reduced weight of the lipo make the car's handling unstable and perhaps undrivable? ... I'm guessing, weight differences not withstanding, that my combo would probably have more power and thus be deemed illegal by my fellow racers.... what do you think??? ... Any thoughts??
I've wondered this myself.
Not for racing, but for letting beginners get into 12th, I was considering running a airplane 1800 LiPo 7.4v with a Mabuchi - very cheap. Esentially the same set up as a M03 Mini Cooper but in a low CG, light weight, foam wheel car. Not rediculous high speed, but slower and light weight to save tires, cheap batteries, cheap speed contoller, emphasis on running good lines.

Any thoughts?
__________________
"We face each other as God intended. Sportsman-like. No tricks, skill against skill alone." -Fezzik
RaceBucks is offline   Reply With Quote
Old 09-10-2006, 10:41 PM   #20456
Tech Champion
 
lbckevin's Avatar
 
Join Date: Jan 2003
Location: Orange County, CA
Posts: 5,442
Trader Rating: 82 (99%+)
Default

Jeff...

What compound foams are you running at Socal (indoor asphalt) for your 12th scale ?

Kevin
__________________
Kevin Smith
Schuur Speed* Hobbywing * Pro-Line * MIP * Paint Monster Airbrushing * Schelle Racing
lbckevin is offline   Reply With Quote
Old 09-10-2006, 11:33 PM   #20457
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by P2
OD, Carpet version looks good! I'll need a carpet car too, let me know when they will be available! Here is my OD12 w/disk instead of side tubes.
Good luck in Vegas!
P2
P2,
thanks for tearin up the asphalt in TX! watch the website for the V-12
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 09-10-2006, 11:36 PM   #20458
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by TFR
Since everybody is posting their 1/12th. Here is my AH12 that I will be using this winter on carpet. Not yet finish.
Sweet! love that royal purple anodizing. could you guess that I like purple?
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 09-10-2006, 11:37 PM   #20459
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by JayBee
Very-VERY Nice!!! You know what that means don't ya ...
The Museum will need another wing?
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 09-10-2006, 11:40 PM   #20460
Tech Regular
 
Join Date: Aug 2006
Posts: 274
Default

hi guys got a 12l4 for sale just letting all you 12scalers know

taking a break, on road stuff high ends

just used once, no scrathes or what so ever on the bottom. with servo s9602, xxl, 3600 battery... crc pink and purple tires. wheele nuts, extra 22 lbs springs, dura shocks by crc, speed 8 body. pdub bumper , just for 160$ shipped

later!!
jinkasama 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 07:36 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