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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:

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Old 06-22-2007, 12:52 AM   #25831
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Quote:
Originally Posted by Big B View Post
I too love the sleek look of 12th scale cars, thats why I bought one, I knew nothing about them, but I knew I had to have one. The Cyclone 12 isn't out yet, and IMO (which isn't worth much) you would be better off with one of the kit just listed, like the Speedmerchant, Corally, CRC Gen X, etc.. Or go to the track and find out what people are running. As for bodies, I think someone asked that a couple pages back, maybe 2 or 3

well u see i run a hb cyclone

so hb for me... so far idk how its doin, but i wouldnt be able to buy one for atleast another month or so,, and the cyclone 12 will be out by then

whats the hot car? is the asso rc12l4 any good? its cheap lol

but i think a cyclone 12... and yes, i am sorta a die hard hb fan.. jsut love there onroads, nd andymoore is using the 12, so it mite have potential


and SWEET!!!! thanks! i love that body! and these cars are CHEAP! 15 for a body and thats pro lines price so thats awsome


thanks again
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Old 06-22-2007, 01:12 AM   #25832
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isnt that cyclone 12 and l4 the same car just different names??
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Old 06-22-2007, 04:08 AM   #25833
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pretty much
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Old 06-22-2007, 08:42 AM   #25834
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Default too easy to say

all 12th cars are very close to each other in parts, appearance, etc. to some degree but are very different when you get down to it.

like the:

Speedmerchant Rev 4 and the CRC CK or GenX, along with one of Diggity Designs CD12

AE 12L4 and the Yokomo 12L4Y

Diggity Designs 3D12 and Darkside Motorsports MX2 inline battery cars

Yari FF07 and the Carpet Ripper CR07

Many could easily make the same comments about T-bar/Dampner tubes cars like the OD12, CRC T-Fource, BMI DB12 (not the latest one), IRS Rug Rat, Hyperform Razor, Laje Speed Evil-07, Corally SPX12, CEFX C-12, Powell DP-12,Trinity BW-12 (discontinued?)

the HB/HPI Cyclone 12 who knows which frontend it will come with, AE, Kawada, or HPI. Hara's car's have been pic'd with different frontends. the rear pod, other than the top plate appears to be one piece. supposedly it's 3 interlocking pieces.

Last edited by fast-ho-cars; 06-22-2007 at 09:12 AM. Reason: my post was chopped for some reason?
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Old 06-22-2007, 08:51 AM   #25835
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Quote:
Originally Posted by fast-ho-cars View Post
all 12th cars are very close to each other in parts, appearance, etc. to some degree but are very different when you get down to it.

like the:

Speedmerchant Rev 4 and the CRC CK or GenX, along with one of Diggity Designs CD12

AE 12L4 and the Yokomo 12L4Y

Diggity Designs 3D12 and Darkside Motorsports MX


Yari FF07 and the Carpet Ripper CR07

Many could easily make the same comments about T-bar/Dampner tubes cars like the OD12, CRC T-Fource, BMI DB12 (not the latest one), IRS Rug Rat, Hyperform Razor, Laje Speed Evil-07, Corally SPX12
True, so it's all in the details. And seeing as the Japanese mostly run asphalt, the car may come with a flexy chassis and other items making it more suitable to asphalt than carpet. The Yokomo is a prime example of this. The YRX is a fantastic asphalt car but requires significant changes to be competitive on the rug.

If you're looking to run carpet, I'd pick up a "carpet" car.
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Old 06-22-2007, 09:00 AM   #25836
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Jason:: Is your BMI a thicker chassis than the others... I am curious of what I might experience on asphalt since my chassis is beefy.
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Old 06-22-2007, 09:23 AM   #25837
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You really cant compare the HB Cyclone TC to a Pan Car, althought the Cyclone 12 is a 12L4 clone and should be a decent car. Go to the track and ask the 12th scale drivers what they are running. To my understanding the damper plate that is used by the 12L4 and the Cyclone 12 is not as consistant as a chassis that uses damper tubes is (but I may be mistaken)
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Old 06-22-2007, 11:10 AM   #25838
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Quote:
Originally Posted by CypressMidWest View Post
True, so it's all in the details. And seeing as the Japanese mostly run asphalt, the car may come with a flexy chassis and other items making it more suitable to asphalt than carpet. The Yokomo is a prime example of this. The YRX is a fantastic asphalt car but requires significant changes to be competitive on the rug.

If you're looking to run carpet, I'd pick up a "carpet" car.

idk, all the races i have watched with the prototype have all been on carpet with andy moore, and i think ive seen hara too

i will go ask them whats the hot car... thanks for all the replie guys
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Old 06-22-2007, 11:46 AM   #25839
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idk, all the races i have watched with the prototype have all been on carpet with andy moore, and i think ive seen hara too

i will go ask them whats the hot car... thanks for all the replie guys
Alot of times the team guys will have thicker chassis and bottom pod plates that they run at carpet races, that aren't included in the production kits, so while the cars look idnetical, the one you buy may not always be "Carpet Spec".
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Old 06-22-2007, 12:12 PM   #25840
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Alot of times the team guys will have thicker chassis and bottom pod plates that they run at carpet races, that aren't included in the production kits, so while the cars look idnetical, the one you buy may not always be "Carpet Spec".
then what do u sujest for carpet?

i like the layout of the rc12l4 or cyclone 12

i CAN race it tarmac out doors, but tire wear, grip, and the overall just ppl driving them there doesnt happen much

i want the layout/look of the chassis as the ae, or hb

i liked that the most from looking at everyones at the cup race we had here.. but that was carpet... just everything fit nicer
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Old 06-22-2007, 12:18 PM   #25841
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I don't know if he still does it, but DP (Doug Powell) can cut you a new chassis of thinner or thicker CF.

E
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Old 06-22-2007, 12:21 PM   #25842
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The cyclone 12 will not be out this year..if we're lucky.
and probably come equiped with an asphalt chassis.
Carpet chassis has been an option on most Japanese made cars.
I've had the Hara 12..and it's very flexy. it was great on Asphalt.

recommend you get a car that Billy at Speedworld has parts for.
get the 12L4.. parts are readily available and it's great for
outdoor and indoor racing. If you want to match your other cars..
get a Purple rear pod...
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Old 06-22-2007, 12:24 PM   #25843
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I don't know if he still does it, but DP (Doug Powell) can cut you a new chassis of thinner or thicker CF.

E
carpet is thicker no flex chassis rite?

any link or something for info?
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Old 06-22-2007, 12:25 PM   #25844
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It is my understanding (probably wrong and will be told so) that a chassis that uses damper tubes has more consistant dampning like the CRC Gen X, T-Force, Corally SP12X, Speedmerchant 4.5, etc..
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Old 06-22-2007, 12:29 PM   #25845
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Quote:
Originally Posted by rc-zombies View Post
The cyclone 12 will not be out this year..if we're lucky.
and probably come equiped with an asphalt chassis.
Carpet chassis has been an option on most Japanese made cars.
I've had the Hara 12..and it's very flexy. it was great on Asphalt.

recommend you get a car that Billy at Speedworld has parts for.
get the 12L4.. parts are readily available and it's great for
outdoor and indoor racing. If you want to match your other cars..
get a Purple rear pod...
hrmmmmm

id race it at the stockton indoor track.... tire wear and everything kinda scares me lol at billys, plus no one really runs them there at the fri nite races and all those kinda races, where all the ppl that ran 12th said the stockton track is where they go

i like tc out doors on tarmac.... 12th scale carpet indoors would be my racer's.... i dont like foams on tc's there so much to play with, and MUCH more money for like a bmi chassis for m cyclone so thats why 12th scale

and rear pod in purple? where? link?
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