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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 02-26-2004, 08:12 AM   #6916
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You know what that means right?? If Associated is willing to free up a few bucks to develop a new 12th scale-then 12th scale is BACK!!! YYYEEEAAAAHHHHHHH!!!

But-its basically a 4-cell L3 so not too much new stuff.

Ray
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Old 02-26-2004, 08:27 AM   #6917
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Black-Knight, how are you liking your Reflex 12?

I am thinking of getting one in month or so and would like to hear how people like them..

It's either the Reflex 12 or the new C12 by CEFX that I will get..

On a sad note, I broke my Rev3 yesterday.. I think that is what caused my car to be squirly... I broke the speedtune turnbuckle..

Thanks

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Old 02-26-2004, 08:45 AM   #6918
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rayhuang: very true..

The 10L4 comes with all the IRS goodies that the L3 didn't....

So, a 12l4 may make getting a an AE car cheaper, considering all the guys I know who get them have to spend $$$$ to get the extra goodies...

Main thing would be the IRS type of axle.

Plus, 6 cell 12th is dead for the most part.
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Old 02-26-2004, 08:51 AM   #6919
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The RC12L4 shown at the Snowbirds has two changes from the RC12L3. First, the chassis is a thicker plate with fewer cutouts than the 12L3 chassis. This looks even stiffer than the special thick plates made for the team drivers. Second, the castor blocks on the front suspension come in 5 degree as well as 10 degree and 0 degree reactive castor. There is also a place in the middle of the castor block to mount a retaining collar for the hinge pin or mount a stiffener that connects both sides. This appears to be their response to the IRS castor block system.
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Old 02-26-2004, 08:53 AM   #6920
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Thanks DavidL-When are ou running at the Gate again? I might be running the Rat tonight in practice. I cannot wait!!

Ray
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Old 02-26-2004, 09:33 AM   #6921
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Are there any pics of the L4?
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Old 02-26-2004, 09:51 AM   #6922
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Just to throw fuel into the fire......

I talked with two Associated "employees" over the weekend that told me about the new 1/12 car:

Going to use IRS large "D" diff ring axel, BUT.....Associated has decided to make there own hub. Not sure why, if there going to outsource to IRS for there excellent axel, wouldn't they outsource there excellent hubs too. I found that odd and asked why? Just got a shoulder shrug......

Batteries to be oriented logways, instead of the L3 sideways.

Front end to have the adjustable caster at 0,5, and 10 degree options.

Two chassis thickness available, one for carpet and one for asphalt.

Sounds like a good car! Associated is just a few miles from my local track. There is no carpet racing here, but I'm hoping to get to try one of the prototypes on the asphalt here at SoCal.. If I do, you'll be the first to hear!!!
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Old 02-26-2004, 11:21 AM   #6923
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Seems like there are very few updates to the 12L4. The large diff, new castor blocks and filled chassis are really the only updates. You have to look twice at the car to notice the changes.

They raised the price $50 and took the tires out of the kit. And seeing how the new car does not have lowered rear pods, better plan on buying lots of tires.
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Old 02-26-2004, 11:24 AM   #6924
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If that's the case, I will not get a new AE car... I like Associated but for $200 I can get other cars that I don't have to spend extra $$ after I get it..

Clint
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Old 02-26-2004, 11:44 AM   #6925
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Quote:
Originally posted by Junkie
Seems like there are very few updates to the 12L4. The large diff, new castor blocks and filled chassis are really the only updates. You have to look twice at the car to notice the changes.

They raised the price $50 and took the tires out of the kit. And seeing how the new car does not have lowered rear pods, better plan on buying lots of tires.
if you buy the IRS lowered pod plates-they pay for themselves as soon as you use three sets of tires down to 1.75" or so-which you could never do with the stock pod plates.
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Old 02-26-2004, 12:03 PM   #6926
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Go with the CRC lowered pods, they are about half the price of other pod manufactures.
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Old 02-26-2004, 12:21 PM   #6927
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Until I get better, I am going to stick with my Rev3 although I am looking at getting a different car for comparison...

Thanks for the info guys.
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Old 02-26-2004, 12:24 PM   #6928
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I'm about to run 12th scale for the first time in many a year. Where abouts should I start gearing a stock motor (monster or binary) for an 8-minute run? On a medium-to-large size carpet track.
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Old 02-26-2004, 12:26 PM   #6929
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1.65 for Binary

1.85 for Monster
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Old 02-26-2004, 12:35 PM   #6930
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yes area i saw the car in person afew of the stuff you guys said is accurate the front end has a couple upgrades to make it more adjustable. the rear pods are different i believe that the axles can run lower to get more life out of the tires, and axle and the hubs aswell they also use they also use the larger diffrings the the chassis is thicker and there are no cut outs were the electronics mount.
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