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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 05-04-2005, 11:40 PM   #13006
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Quote:
Originally posted by theisgroup
hey guys looking at going to the US pan car champs in San Antonio. reviewed the rules and was wondering what you guys thought. It looks like they are going to run 4 anc 6 cell 1/12 in the same classes. The 6 cells do have to meet min weight requirements. I still don't think that will be a fair race. especially for mod. what are your thoughts.

I know there was a discussion a few weeks ago, but not sure what happened in that one.

TIA
they have posted for some time now that they will not run together in their own Thread. it's 4-cells "according to ROAR rules", not 1/12th onroad "according to ROAR rules" which would i guess allow 4 & 6 to run together

REPOST:
look at the EFRA 1/12 championship in Europe 2 years ago.

at first they allowed 6 and 4 cell to race together.

6 cells could only run a 17T spec motor (i beleive with bushings)

4 cells could run any motor. car weight was lighter

it ended up being a gaggle/fight. drivers protested/complained and the classes were split.

most of the top Euro drivers were running 4-cell, however started complaining after the first qual. the 4 cell guys were faster only in the infield. the 6 cell guys ruled all the straights due to the extra voltage/horsepower, never dumped with that 17T motor, and needed no rec-pks. the 4 cell cars had problems dealing with cars that weighed more and took different lines due to the weight.

the rep0rt on it was on WWW.TeamCRC.com back then, probably gone now. a CRC racer in europe Bachoner (spelling?) probably still has the whole inside scoop.

MY Opinion:
i have raced 4 and 6 cell 1/12, the weight penalty wouldn't be a hindrance.

they race 1/10 pan oval at our Hobbytown. 4 cell stock and 6 cell stock. 6-cell guys look like 4 cell MOD almost and turn 2-3 laps more in 4-minutes than the same cars with 4-cells

Last edited by fast-ho-cars; 05-04-2005 at 11:47 PM.
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Old 05-05-2005, 12:45 AM   #13007
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hey guys....wazzup

i am thinking of getting into 12th scale racing with a crc carpet knife...

is there anything i should know about 12th scale that 1/10th haznt taught me?
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Old 05-05-2005, 06:48 AM   #13008
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We got into a real mess with trying to split the classes so that's why we just call it 1/12 stock and mod and that is the only split we have. We are going ROAR rules. That is what I have said and that is the way it's going to be fast-ho-cars.
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Old 05-05-2005, 06:54 AM   #13009
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which means 4 and 6 in the same heats with a weight penalty for 6 cells.

Just as a comment, I beleive that non of the Dallas people will be making the race due to this ruling. I think I am the only one venturing down. I talked with most of the guys last weekend and they said 4 and 6 all together will keep them from this race.
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Old 05-05-2005, 07:06 AM   #13010
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Quote:
Originally posted by theisgroup
which means 4 and 6 in the same heats with a weight penalty for 6 cells.

Just as a comment, I beleive that non of the Dallas people will be making the race due to this ruling. I think I am the only one venturing down. I talked with most of the guys last weekend and they said 4 and 6 all together will keep them from this race.
That's unfortunate bud. Hopefully for next year this whole 4 vs. 6 cell thing will be cleared up in the rulebook, but we had to make a stand even if it was an unpopular one
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Old 05-05-2005, 08:18 AM   #13011
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Just to clear things up a bit, the rules clearly state that the call for what number of cells to run can be made by the Track itself. I'm here to let everyone know that ALL 1/12th scale classes will be 4 cells. Hope this clears the confusion.
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Old 05-05-2005, 08:22 AM   #13012
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that does clear things up. it did not read that way on the forums to most of us. I will let my fellow racers here know and see if I can get a few of them to come down with me
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Old 05-05-2005, 08:34 AM   #13013
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Sounds great! Glad to help. Just to let everyone know, My name is Brad and I'm with ROAR promotions. I'm leading the effort to return pan car racing (1/12th and 1/10th) to its former glory. Got a lot of exciting things in the works and just wanted to let you guys know that I'll keep you posted as things develope. Though part of ROAR promotions, I am heading this up as an independant. Just thought this would interest you guys. Later!
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Old 05-05-2005, 09:37 AM   #13014
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that's what I THOUGHT that TD had decided earlier. . .
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Old 05-05-2005, 09:41 AM   #13015
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Hi Brad,

Good to hear ROAR is doing something for the class. I'm in NorCal and we are getting an increasing number of 12th scalers here. On the rug we were getting two full heats for a good while in Stock and are trying to continue this outside. Stock is not as slow as a lot of People would think, about 3-4 tenths a lap behind 19T sedan.

Please be sure to keep us posted, whatever you can do to help us out would be great.

Chris.
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Old 05-05-2005, 09:53 AM   #13016
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Quote:
Originally posted by Boomer
that's what I THOUGHT that TD had decided earlier. . .
I just wanted to make a stand. Brad wants to make sure that there wasn't any confusion in the interpretation of the rules
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Old 05-05-2005, 12:08 PM   #13017
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Quote:
Originally posted by Brian McGreevy
I am jolly.

How art thou, Sire Ruggles?

Me thinks me 12th scale commeth rather soon.
I am quite jocular as well.

The news of your forthcoming foray into the fine world of 12th scale is quite pleasing to hear. Wilst thou be piloting a BMI vehicle?
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Old 05-05-2005, 01:43 PM   #13018
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Quote:
Originally posted by DavisMods
Just to clear things up a bit, the rules clearly state that the call for what number of cells to run can be made by the Track itself. I'm here to let everyone know that ALL 1/12th scale classes will be 4 cells. Hope this clears the confusion.
This completely contradicts what the race promoter said a few posts before yours.
So which is it?
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Old 05-05-2005, 02:07 PM   #13019
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What I said above is what stands. If you or anyone else has more questions about the race and want an honest, straight forward answer, please feel free to contact me directly at ROARpromos@aol.com
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Old 05-05-2005, 02:19 PM   #13020
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Quote:
Originally posted by CypressMidWest
I am quite jocular as well.

The news of your forthcoming foray into the fine world of 12th scale is quite pleasing to hear. Wilst thou be piloting a BMI vehicle?
Yes, that is the way of things. This will not be the first venture into the fine world of 12th scale for myself. I find the BMI vehicle my best means of race vehicle, though bruce's mighty machine has its own appeal.
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