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 07-28-2007, 08:42 PM   #26461
Tech Master
 
CarlosG.'s Avatar
 
Join Date: Jul 2004
Location: Falls City,TX
Posts: 1,145
Trader Rating: 12 (100%+)
Send a message via Yahoo to CarlosG.
Default

Well, it is cause I figure I can play follow you and try to stay with you as long as I can.This way I can come closer to whoever I might be behind and make up sometime. The longer I can hang with you the better I become.

Also, I am thinking about not running in that 18r class. I had fun playing with my tc.Don't mistake me for wanting to stop running 12th scale, wich I have no intentions of doing, but since it has been a good 3 yrs from the last time I have driven a tc, it was fun.
CarlosG. is offline   Reply With Quote
Old 07-28-2007, 09:50 PM   #26462
NT
Tech Elite
 
NT's Avatar
 
Join Date: Jun 2006
Posts: 4,507
Trader Rating: 21 (100%+)
Default

Quote:
Originally Posted by tony gray View Post
Ummm...I dont recall seeing YOUR name in the A main listing at the Vic Titles Nath? But mine was.......

Anyway, we can now combine both interests, 12th scale AND Mini. Check this puppy out here. Its a 12th scale basically, but adapted to Mini wheelbase and Mini wheels! Oh yeah.... You know you want one!

Man - is it possible to hide anything from you?!?!?!

And you had to use cheater tires and a cheater motor - you went against your own rules

If i can't convince the Keilor 1/12's to come out and play - one of those Tech Mini's would certainly look cool on the shelf - and i might finally be able to catch the others!
NT is offline   Reply With Quote
Old 07-29-2007, 07:35 AM   #26463
Tech Adept
 
Join Date: Mar 2007
Posts: 225
Default

Quote:
Originally Posted by Humpty View Post
This is Hyperdrive Racings Newest 1/12th .. Its a T Plate Car ..Thicker Chassi for Carpet Racing ..Plenty of room in Pod for Brushless ...Pod desigh allows you to put a brushless motor in without removing tire or top Plate ...Goes right in ...Great Car made by a Great Company ...Thanks for Looking ...Anyone interested that lives in the Phoenix area or Tucson Area we will be racing them at Competition Hobbies every Friday night ...
CRC T-Rorce with a new top plate and slightly different chassis...
march to my own is offline   Reply With Quote
Old 07-29-2007, 09:18 AM   #26464
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

ouch
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 07-29-2007, 09:44 AM   #26465
Tech Fanatic
 
TMR CHASSIS's Avatar
 
Join Date: Feb 2005
Location: SRS, AZ
Posts: 953
Trader Rating: 17 (100%+)
Send a message via AIM to TMR CHASSIS
Default

Quote:
Originally Posted by march to my own View Post
CRC T-Rorce with a new top plate and slightly different chassis...

WOW they really look the same to me NOT!!!! both red and have asc frontend on them yes but all of us know chassis design and thickness makes all the difference in a car. Plus rear pod is moved over to the right to where center of motor is center of the car. But yes must be the same

Quote:
Originally Posted by Humpty
This is Hyperdrive Racings Newest 1/12th .. Its a T Plate Car ..Thicker Chassi for Carpet Racing ..Plenty of room in Pod for Brushless ...Pod desigh allows you to put a brushless motor in without removing tire or top Plate ...Goes right in ...Great Car made by a Great Company ...Thanks for Looking ...Anyone interested that lives in the Phoenix area or Tucson Area we will be racing them at Competition Hobbies every Friday night ...]

Last edited by TMR CHASSIS; 01-04-2009 at 03:26 PM.
TMR CHASSIS is offline   Reply With Quote
Old 07-29-2007, 12:14 PM   #26466
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by march to my own View Post
CRC T-Rorce with a new top plate and slightly different chassis...
So what's the point?
You could say a T-Fource is a 12L4 with damper tubes. 95% of 1/12th cars are directly drived from the 12L4 and look similar. It's the details that make each one unique; my own car looks like a T-Fource too but it's not. Maybe I should re-design it with 5 wheels so it will not resemble the other cars
odpurple is offline   Reply With Quote
Old 07-29-2007, 12:42 PM   #26467
Tech Master
 
CarlosG.'s Avatar
 
Join Date: Jul 2004
Location: Falls City,TX
Posts: 1,145
Trader Rating: 12 (100%+)
Send a message via Yahoo to CarlosG.
Default

As long as the 5th wheel acts like a wheelie bar that is fine. Cause both P2 and I did wheelies.
CarlosG. is offline   Reply With Quote
Old 07-29-2007, 01:27 PM   #26468
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by CarlosG. View Post
As long as the 5th wheel acts like a wheelie bar that is fine. Cause both P2 and I did wheelies.
You're on!
odpurple is offline   Reply With Quote
Old 07-29-2007, 02:01 PM   #26469
Tech Fanatic
 
Join Date: Jun 2005
Posts: 900
Default

C'mon OD - Tyrrell six-wheeler F1 car; it's gotta be done!!
SlowerOne is offline   Reply With Quote
Old 07-29-2007, 03:22 PM   #26470
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default The DB12R can fit huge gear ratios!

I just installed my Novak 10.5 Pro in my DB12R prototype. I wanted to see what the biggest pinon that I could fit with an 88 spur. Well, I can see plenty of daylight between the 88T spur and a 44T pinion! Thats the biggest pinion I have. You will be able to hit any gear ratio you need with a BL motor in a DB12R
Attached Thumbnails
1/12 forum-img_1461.jpg   1/12 forum-img_1463.jpg  
AdrianM is offline   Reply With Quote
Old 07-29-2007, 03:29 PM   #26471
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

sweet.i think it is safe to say that a 13.5 will not be a problem
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 07-29-2007, 04:41 PM   #26472
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 protc3 View Post
sweet.i think it is safe to say that a 13.5 will not be a problem
might need a 83 spur for the 13.5
Marcos.J is offline   Reply With Quote
Old 07-29-2007, 05:14 PM   #26473
Tech Elite
 
RCSteve93's Avatar
 
Join Date: Dec 2005
Location: Long Island, New York
Posts: 4,603
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by AdrianM View Post
I just installed my Novak 10.5 Pro in my DB12R prototype. I wanted to see what the biggest pinon that I could fit with an 88 spur. Well, I can see plenty of daylight between the 88T spur and a 44T pinion! Thats the biggest pinion I have. You will be able to hit any gear ratio you need with a BL motor in a DB12R
That very little hole in the very back of the bottom pod plate, in the second picture... Is that for balencing the car, and will that be in production?
__________________
rm -rf /windows
RCSteve93 is offline   Reply With Quote
Old 07-29-2007, 06:08 PM   #26474
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by RCSteve93 View Post
That very little hole in the very back of the bottom pod plate, in the second picture... Is that for balencing the car, and will that be in production?
Yes it is a balancing hole and yes it will be in the production kit. There is one on the front of the chassis too.

FYI, IRS makes a set of delrin 1/2 balls with a pin in the flat sides that will fit into these holes so you can check and perfect your lateral balance

Also, the alloy pod plates do not offset the axle back at all compared to a 12L4. Jason tweeked the shape of the motor openings and this in combinaion with Jason's very low profile flex link suspension allow the motor to move very far forward. This is better than moving the axle back or pushing the batteries forward to make room as both of these are compromises that negatively effect a cars performance.
AdrianM is offline   Reply With Quote
Old 07-29-2007, 06:08 PM   #26475
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 RCSteve93 View Post
That very little hole in the very back of the bottom pod plate, in the second picture... Is that for balencing the car, and will that be in production?
it is to balance the car, jason has put those in every 1/12th scale that i know of, i have own 3 different BMI 1/12th scales and they all had them
Marcos.J 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: 3 (1 members and 2 guests)
noproblems209
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 09:36 PM.


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

SEO by vBSEO 3.5.0