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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 02-17-2011, 07:58 AM   #35461
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Hi there I have the hudy setup and tweak station fir my 1:12. Do I need to use the tweak fir both front and rear? How would I measure the tweak on the rear.

In terms of the front. What shall I measure first?

Thanks.
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Old 02-17-2011, 09:58 AM   #35462
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Lightbulb 2S LiPo

Quote:
Originally Posted by 29TC View Post
Hey guys,

Just wanted to find out if there are any 2s 7.4v/6.6v LiPo or LiFe cells that can fit into a 1/12th kit to power the esc/ motor?

Thanks in advance.
Quote:
Originally Posted by gramm View Post
Yes. something like this?

This isn't my car though. I run a 2s 1800mah 25C with a 27T stock. Goes well and runs for a long time.
Like some "Racers" out there, I too have long sought a 2S LiPo "Solution" for 12th Scale power. About a month ago Stormers had on their Storefront Specials, a 2200mA, 28C SMC LiPo (#SMC2228LT) that would fit in my Gen XL, weighted 100 grams, and only needed to change the connecter (to Deans) and fabricate a means to secure it in the Car, (took about 20 minutes).

With a 13.5 DUO I, Tekin RS on 212FW in "Blinky Mode", Rolled out @46mm, Car has "Open Mod" speeed, weighs 680 grams, and now only lacks a "Good Overall Setup".

Would be very nice to see "Open Mod" go to open Voltage, and No Min Weight restriction as this would solve many problems, IMO!
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Old 02-17-2011, 11:48 AM   #35463
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Quote:
Originally Posted by el salvador View Post
Like some "Racers" out there, I too have long sought a 2S LiPo "Solution" for 12th Scale power. About a month ago Stormers had on their Storefront Specials, a 2200mA, 28C SMC LiPo (#SMC2228LT) that would fit in my Gen XL, weighted 100 grams, and only needed to change the connecter (to Deans) and fabricate a means to secure it in the Car, (took about 20 minutes).

With a 13.5 DUO I, Tekin RS on 212FW in "Blinky Mode", Rolled out @46mm, Car has "Open Mod" speeed, weighs 680 grams, and now only lacks a "Good Overall Setup".

Would be very nice to see "Open Mod" go to open Voltage, and No Min Weight restriction as this would solve many problems, IMO!
What many problems..did I miss the bus again?
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Old 02-17-2011, 12:00 PM   #35464
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Originally Posted by OVA View Post
What many problems..did I miss the bus again?
+1
My "1s" 12R5 Mod weighs about 700gr
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Old 02-17-2011, 01:40 PM   #35465
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come on guys, you know the decline of pan car attendance since the 1s pack. lol

oh, wait, are you saying that pan cars are alive and well? that they are some of the largest classes at the major races? that people have figured out how to make 3.7v work? that can't be so.

come on guys 2s will save on road racing, it is the ticket. if we only make pan cars 2s, then we will have the 100-300 racers each week for our club races like we did back in the day. i just know it.
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Old 02-17-2011, 01:57 PM   #35466
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i only know 1s as this is my 1st year racing 1/12th scale and it seams ok to me (my limited experiance)

is the power so much lower then 4 cells ??

surely with 2s these little things will be over powered ?? I drive 1/10 touring cars and these are quick with 2s and timable speedos
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Old 02-17-2011, 01:59 PM   #35467
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Quote:
Originally Posted by OVA View Post
What many problems..did I miss the bus again?
You should "Get your Bus Pass" canceled Franko!

Wasn't meaning to "Spark any Debate", However, It's Not a very well Kept Secret on my part that I've long Hated this reduced voltage Spec the "Powers That Be' have managed to Foist/Impose on us! So rather than debate, suffice to say, If those of you out there see "No Problems with Low Voltage, then having to use a Booster or Rx Pack to make the rest of your Electronics function, then "YOU SEE NO PROBLEM"!

"I", simply disagree, thats all!!

I'd also like to see Open Mod 12th Scale, be Exactly That, "OPEN", as in "Run whatever you can setup and drive, No restrictions what so ever! Won't ever happen, but thats just me!

BTW, our "Panda Buddy" @ TZII GP had good Qual runs going only to have his Car "Shut Down" in the final Laps!! Go Figure.
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Old 02-17-2011, 03:54 PM   #35468
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How is having to run a booster/rec pack now any different than when people ran rec packs in the round cell days??
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Old 02-17-2011, 04:38 PM   #35469
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Quote:
Originally Posted by Serzoni View Post
How is having to run a booster/rec pack now any different than when people ran rec packs in the round cell days??
The difference is that then you didn't have to, it was a choice.

Doesn't bother me though but I'm a nitro guy so I'm used to it.
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Old 02-17-2011, 06:51 PM   #35470
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There was a thread that turned into a discussion of the pros and cons of 2s in 1/12th scale, it dissappeared quite a while ago. At the time (what was it, two years ago?) it was a valid discussion but that time has passed, 1s is now the rule and it works very well.

That being said, if a person wants to run 2s in his 1/12th scale car he should go ahead and do so. He can take it to the track on practice day and play with himself 'til his heart's content
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Old 02-17-2011, 07:59 PM   #35471
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yokomo has 2 cell lipo battery(7.4V 2800mAh) as same size as 1 cell lipo which we are useing for 12th.

http://www.teamyokomo.com/jpn/partsl...yb_p228be.html



21.5T might be better than 17.5T, without voltage booster or receiver battery.
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Old 02-17-2011, 08:06 PM   #35472
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I'm a Like'a!
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Old 02-18-2011, 07:18 AM   #35473
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Default S120L

hi Guys, i just put together my S120L. im running a Speed passion GT 2.1EX SP 1 Cell 4.5T motor. and 1 cell. my track is open and fast, long straight
what would be a good starting point for Roll out, and ESC settings ? and with this ESC, do i need to run a booster batt ? Thanks.
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Old 02-18-2011, 07:47 AM   #35474
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Quote:
Originally Posted by Pattojnr View Post
hi Guys, i just put together my S120L. im running a Speed passion GT 2.1EX SP 1 Cell 4.5T motor. and 1 cell. my track is open and fast, long straight
what would be a good starting point for Roll out, and ESC settings ? and with this ESC, do i need to run a booster batt ? Thanks.
Paul, no need booster for this ESC is make for 1s, for 4.5T start with 32-34 rollout with mild boost no turbo yet, once you happy with the infield bottom end then start add small amount of turbo for more top speed. hope this help

I think is only you and me race s120L in OZ.
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Old 02-18-2011, 07:51 AM   #35475
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Originally Posted by el salvador View Post
Oooohhhhh! Me Thinks Diss B Da Shizzzzzzz!!!!

I'm a Like'a!
ok, except with a mod motor maybe you will make 5minutes?
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