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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 08-12-2010, 02:51 PM   #34246
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Dayum Brian...that's gonna be one heck of a schedule...fly to sydney for a few days, come home for a few days, then off to the IIC.
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Old 08-12-2010, 06:31 PM   #34247
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Hey Sydney racers, I am on my way for a visit (this time for real!) Where are you currently racing at? If time permits, I would like to swing by. Should be there Aug 23-25 which is mid week. Not ideal, but you never know.
Brian
Aug 25 is Wednesday here. When time is your flight back? If it allows you could take your 12th for a bash around Windsor on wed afternoon/night as they are open late as a sort of practice night every wed night. It isn't carpet but a painted concrete surface. It is painted with a sandy paint that ups the grip quite a bit of the standard surface, then they have layed down layers of VHT so your shoes stick to it as you walk across it. Dumping a 10.5 1s is not hard with so much grip and it shouldn't be hard to stash your 12th, radio and a battery or two in with your luggage.
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Old 08-12-2010, 08:56 PM   #34248
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Tuesday AUG 24th is Sydney model autosport (SMA) club day. We are 5min from airport. But we don't run 12th scale on night racing, only Sundays.
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Old 08-14-2010, 10:22 PM   #34249
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Whats a good shop to buy tires from? I just bought my first 1/12th roller(RC12R5), I come from the world of onroad gas.
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Old 08-14-2010, 10:56 PM   #34250
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Whats a good shop to buy tires from? I just bought my first 1/12th roller(RC12R5), I come from the world of onroad gas.
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Old 08-15-2010, 01:05 AM   #34251
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stormerhobbies.com
Agreed!!! Stormer is awesome. You can also get the CRC tires from www.teamcrc.com. Either one will hook you up.
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Old 08-15-2010, 09:12 AM   #34252
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Ashford for Jacos, Parmas and Xceeds.
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Old 08-15-2010, 10:51 AM   #34253
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Whats a good starting compound for a track with medium traction? I like a pinty car.
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Old 08-15-2010, 10:52 AM   #34254
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I've been running dbl pink rears and purple fronts. Other's like black fronts and grey rears.
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Old 08-15-2010, 11:00 AM   #34255
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Whats a good starting compound for a track with medium traction? I like a pinty car.
Totally depends on the track, the motor and the driver.

Running 10.5 on low to medium grip carpet, I like Magentas all the way around. 2xpink fronts with pink rears also works very well and others have had good luck with black/yellow. If the track was higher bite, we would probably need a harder front like lilacs or purples.

17.5 on high bite, you're going to want to take some grip out of the car and will need something different.
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Old 08-15-2010, 01:10 PM   #34256
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Whats a good starting compound for a track with medium traction? I like a pinty car.
I see your from Oxnard. Do you race at Camarillo? We run 17.5 and I had good luck with double pink fronts and grey rears last Sunday.

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Old 08-15-2010, 01:54 PM   #34257
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I see your from Oxnard. Do you race at Camarillo? We run 17.5 and I had good luck with double pink fronts and grey rears last Sunday.

Jeff V.
Yeah, I started racing nitro sedans back in 01 at Freedom Park, raced for a couple of years, had to quit, got back into it in 07 with a nitro sedan and 1/8th, I race at GLARCRC. I just need something to keep me sharp when I cant go or dont feel like making the drive. Something to pracice with after work on saturday afternoons, and the occasional race.

Thanks, Ill get a few sets of those tires. What about setup? Springs, oil in the shock? I've never driven one of these, but from reading the trread a bit I take it that the cars seem to have a lot of steering? ANy advice would be helpfull as am a complete noob when it comes to 1/12th scale.
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Old 08-15-2010, 02:00 PM   #34258
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Quote:
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Whats a good starting compound for a track with medium traction? I like a pinty car.
Quote:
Originally Posted by wingracer View Post
Totally depends on the track, the motor and the driver.

Running 10.5 on low to medium grip carpet, I like Magentas all the way around. 2xpink fronts with pink rears also works very well and others have had good luck with black/yellow. If the track was higher bite, we would probably need a harder front like lilacs or purples.

17.5 on high bite, you're going to want to take some grip out of the car and will need something different.
Quote:
Originally Posted by J-VET View Post
I see your from Oxnard. Do you race at Camarillo? We run 17.5 and I had good luck with double pink fronts and grey rears last Sunday.

Jeff V.
If you all are running in Oxnard/Camarillo, it's pretty safe to say you're running on asphalt? I'm from Oxnard myself and can't think of any indoor tracks nearby is why I say.

Wingracer is giving you good setups for carpet and may not work for what you are running. Not trying to say that what Wingracer told you is erroneous, they may work but, you should probably specify that you are running asphalt so that people who typically run that application can provide you with the best information for your problem.

How are things in Oxnard? I look at the weather on weather.com for Oxnard and it makes me want to puke because the weather there is so good and it sucks so bad here.
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Old 08-15-2010, 04:04 PM   #34259
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Quote:
Originally Posted by nitrodude View Post
Whats a good starting compound for a track with medium traction? I like a pinty car.
Quote:
Originally Posted by nitrodude View Post
Yeah, I started racing nitro sedans back in 01 at Freedom Park, raced for a couple of years, had to quit, got back into it in 07 with a nitro sedan and 1/8th, I race at GLARCRC. I just need something to keep me sharp when I cant go or dont feel like making the drive. Something to pracice with after work on saturday afternoons, and the occasional race.

Thanks, Ill get a few sets of those tires. What about setup? Springs, oil in the shock? I've never driven one of these, but from reading the trread a bit I take it that the cars seem to have a lot of steering? ANy advice would be helpfull as am a complete noob when it comes to 1/12th scale.
The best way to get this info is to go to the track you want to race at and talk to the racers there. We can suggest a bunch of setups/tires but getting the info from the racers will have you up and going the fastest.
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Old 08-15-2010, 04:07 PM   #34260
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Yeah, its asphalt. Weather here today is beatiful! What I call perfect RC racing weather, sunny, not too hot, a little breeze, just nice. Except I have to work and they are having a big SCT race on the offroad track. It will be a few weeks before I get the electronics for the car, so when I get the car(hopefully by wednesday) Ill take it appart and go tru it. I jusr realized I've never built a ball diff before either.

Whats a good speedo and 17.5 motor? Ive been reading up a bit and the speedo I would buy not knowing much is the Tekin RS. I love the fact that its software is upgradeable and you can hook it up to the laptop and set it up. Opinions and advice?
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