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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 10-09-2008, 07:34 PM   #29476
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It has been discussed...however the voltage is not equivalent to any NiMh or NiCad 4 cell pack so it isn't likely to be legal for racing anytime in the near future. If your just bashing around it'll be fine.
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Old 10-09-2008, 09:31 PM   #29477
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Quote:
Originally Posted by RCSteve93 View Post
Bill said the production kit will have the Hot Bodies shock and choice of CRC or Associated front end.

And I am with you on Metric. Metric or nothing. I wanted an R5 because it is metric... well at least half of it is. I would rather have an all imperial car then a half metric/half imperial car.
well we tested the car and we were very happy with it

easy to drive and lot of conner speed we will be doing more inprovments
to make the car the best we can offer
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Old 10-10-2008, 08:46 AM   #29478
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Quote:
Originally Posted by InspGadgt View Post
It has been discussed...however the voltage is not equivalent to any NiMh or NiCad 4 cell pack so it isn't likely to be legal for racing anytime in the near future. If your just bashing around it'll be fine.
lol, the thought of bashing a 1/12 is funny. i would like to see it though.
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Old 10-10-2008, 09:43 AM   #29479
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Quote:
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lol, the thought of bashing a 1/12 is funny. i would like to see it though.
Tennis Courts + RC12R5 + MM5700 + 4 Cell 4700 = FUN!

I wasn't able to get to the track yesterday, so we went to the tennis courts that are a block away and ran my R5. Started out with racing settings on the ESC-a gentle throttle curve, low timing, etc (its a track that only races 27t Stock for 1/12 and 1/10) and on the next pack moved up to High timing, less gentle throttle curve, and a bigger brake curve. It was amazingly fun-four courts big, no one playing Tennis (Thursday mid day), and smooth running so I didn't scratch the chassis like asphalt streets do. There were some leaves in the corner that made things interesting, although at the end they caused some trouble. I'm putting together a video of all of it, its an amazingly fast set up and I look forward to making an edit of it on Highest Timing geared up since I was geared for 4.5r conservatively at the time.
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Old 10-10-2008, 11:31 AM   #29480
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I used to practice on tennis courts all the time.....one of the best types
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Old 10-10-2008, 12:24 PM   #29481
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If my parts are in Monday I'll probably see about setting up some cones or something. Once the nets come down it'll be really nice, might try doing some fun oval.
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Old 10-10-2008, 02:29 PM   #29482
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Hi guys,

With the first "real" onroad track to be open in my country (december 2008, about 60 x 40 meters microasphalt rectangle, painted or market to have a lot of variable layouts) im about to buy a 1/12th car, i dont mind if i ended being the only one lol !! ... right now there is a couple of "not so good tracks" where people race mainly 1/10 nitro and 1/10 touring (27T BL systems) on rubbers (both).

The thing is that it seems that for me will be easily to get HOT BODIES parts than Associated parts, so ... how good its the Cyclone 12 car ?, i will be installing GTB + 13,5 BL system and 4 x NiMH batts ...

thanks a lot,
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Old 10-10-2008, 09:39 PM   #29483
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Quote:
Originally Posted by Mark Stiles View Post
For anyone interested, here are some videos of the A finals from the first round of the 2008/9 UK nationals.

We run 10.5 stock on saturdays, and open modified and sportsmans (10.5 stock or 12t brushed) on sundays.

Open Mod A
http://www.youtube.com/watch?v=cMgp61bf_is (thats me binning it off at 6:45!)

Sportsmans A
http://www.youtube.com/watch?v=3mUjLdH6RP4

Stock A
http://www.youtube.com/watch?v=qri8ylKZ5oU

Round 2 takes place in 10 days time, when we celebrate 30 years of nationals in the UK.

what winds do you run in open mod??
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Old 10-10-2008, 09:50 PM   #29484
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what winds do you run in open mod??
a page or so back someone posted a article about the race. they are running 5.5T.
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Old 10-11-2008, 12:15 AM   #29485
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Quote:
Originally Posted by Tabushi View Post
Hi guys,

With the first "real" onroad track to be open in my country (december 2008, about 60 x 40 meters microasphalt rectangle, painted or market to have a lot of variable layouts) im about to buy a 1/12th car, i dont mind if i ended being the only one lol !! ... right now there is a couple of "not so good tracks" where people race mainly 1/10 nitro and 1/10 touring (27T BL systems) on rubbers (both).

The thing is that it seems that for me will be easily to get HOT BODIES parts than Associated parts, so ... how good its the Cyclone 12 car ?, i will be installing GTB + 13,5 BL system and 4 x NiMH batts ...

thanks a lot,
Hot Bodies Cyclone is a great car, the AS R5 as well, you can't go wrong with any car on the market right now. GTB is a good speedo, but it's rather large for 12th scale, if you still haven't bought it I would suggest to take a look at the Speed Passion GT LPF. I have raced with a GTB for a season without a problem, but the heatsink was touching body and I couldn't run the body as low as I would have wanted to.
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Old 10-11-2008, 09:01 AM   #29486
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a page or so back someone posted a article about the race. they are running 5.5T.

thanks
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Old 10-11-2008, 10:00 AM   #29487
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Originally Posted by Tabushi View Post
Hi guys,

With the first "real" onroad track to be open in my country (december 2008, about 60 x 40 meters microasphalt rectangle, painted or market to have a lot of variable layouts) im about to buy a 1/12th car, i dont mind if i ended being the only one lol !! ... right now there is a couple of "not so good tracks" where people race mainly 1/10 nitro and 1/10 touring (27T BL systems) on rubbers (both).

The thing is that it seems that for me will be easily to get HOT BODIES parts than Associated parts, so ... how good its the Cyclone 12 car ?, i will be installing GTB + 13,5 BL system and 4 x NiMH batts ...

thanks a lot,

There is no bad car in the 1/12 market right now, thay all are capable of winning in a good drivers hand so pick the car that has the best parts support either local or on-line. As for the GTB you need the 4-cell version, a regular GTB will not fit under the body unless you remove the heatsink.
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Old 10-11-2008, 11:29 AM   #29488
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is the tekin still currently the smallest brushless esc? and is there any word for the official release of the ko propo brushless?
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Old 10-11-2008, 07:37 PM   #29489
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Is any company making a lipo pack for Gen X ? having trouble finding info. thanks.
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Old 10-11-2008, 08:04 PM   #29490
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I believe the Tekin is still the smallest footprint in a BL still.

Someone was asking about LiPo a page or so back...there is a saddle pack being made but it isn't legal for racing as it is lower voltage then the NiMh pack...you may even need a reciever pack with it depending on your reciever and what motor you use.
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