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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 09-09-2008, 11:06 AM   #29266
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Quote:
Originally Posted by RC12 View Post
Hello Guys,

Newb to 12scale so I need some help

Here are my setup...
Kit: AE 12R5
Spur: Stock Spur
Tires: Pink/D.Pink JACO
ESC: LRP Sphere Comp.
Motor: 13.5 Orion/10.5 Orion
Track: Indoor Asphalt Med/High Grip

What PINION to use for..
Motor 13.5 Orion = ?? Pinion
Motor 10.5 Orion = ?? Pinion

Any help or suggestion would be really appreciated! Thanks in advance!!
Anyone? Help?...
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Old 09-09-2008, 11:26 AM   #29267
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From what I can tell GRP and Parma use the same rubber or feel like the same rubber.Jaco uses a different rubber. Their might also be an offset difference between the two brands. If anybody knows please chime on in and let us know.

Last edited by CarlosG.; 09-09-2008 at 11:35 AM. Reason: more thought.
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Old 09-09-2008, 11:32 AM   #29268
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Quote:
Originally Posted by RC12 View Post
Anyone? Help?...
Gearing all depends on the track you run at. I would say ask the racers at the track you are going to run at for what they are geared at. Also alittle more information on tha track you run at would help abit so someone can chime in on where you should start at as far as gearing/rollout is concern.
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Old 09-09-2008, 03:09 PM   #29269
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Default Brushless speedo?

Hey guys.....someone in the buy/sell section was selling a tekin B1....the add stated that he had been using this speedo for stock 1/12th racing. Can this speedo handle the 17.5.......and if I'm asking in the wrong thread...let me know where I could find this out(I looked on team tekin's page the B1 advertising says up to a 380 size motor?)??

Thanks,
Roy
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Old 09-09-2008, 03:13 PM   #29270
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Quote:
Originally Posted by xrayroooahhhh View Post
Hey guys.....someone in the buy/sell section was selling a tekin B1....the add stated that he had been using this speedo for stock 1/12th racing. Can this speedo handle the 17.5.......and if I'm asking in the wrong thread...let me know where I could find this out(I looked on team tekin's page the B1 advertising says up to a 380 size motor?)??

Thanks,
Roy
I beleive that their b1 is a brushed speedo
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Old 09-09-2008, 03:17 PM   #29271
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Quote:
Originally Posted by xrayroooahhhh View Post
Hey guys.....someone in the buy/sell section was selling a tekin B1....the add stated that he had been using this speedo for stock 1/12th racing. Can this speedo handle the 17.5.......and if I'm asking in the wrong thread...let me know where I could find this out(I looked on team tekin's page the B1 advertising says up to a 380 size motor?)??

Thanks,
Roy
I used the B1 with a CO27 (stock motor) in my 1/12 scale without issues. However, as stated above, it will only work with brushed motors. A 17.5 motor is brushless.
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Old 09-09-2008, 03:22 PM   #29272
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Default oooops my bad!!!

Memory isn't as good as it used to be!!! Thanks I can still get one cheap so might try the old CO27 trick!!!

R
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Old 09-09-2008, 04:00 PM   #29273
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Originally Posted by Erik Aa View Post
Has anyone experience with GRP 1:12 tires? How do they compare to Jaco tires?

Any differences in rims or other stuff (e.g. offset, foam quality) that I should be aware of? I've been very happy with Jaco tires, but GRP tires seem more readily available where I shop these days.

Thanks.
Quote:
Originally Posted by CarlosG. View Post
From what I can tell GRP and Parma use the same rubber or feel like the same rubber.Jaco uses a different rubber. Their might also be an offset difference between the two brands. If anybody knows please chime on in and let us know.
Parma wheels and tires are manufactured by GRP, same wheels and rubber.
I've been using Parmas for years and like them a lot. The wheels run straighter than any other brand. Parma/GRP don't have as many compound choices as Jaco but I can always get the car to work with set up changes rather than the small difference, say, between a Lilac and a Purple. Parma rear wheels have less offset than Jacos, at about 2.5mm compared to a little over 3mm for the Jacos. Front track will be slightly narrower with Jaco fronts compared to Parmas by about 1.5mm
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Old 09-09-2008, 08:37 PM   #29274
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Originally Posted by CarlosG. View Post
Gearing all depends on the track you run at. I would say ask the racers at the track you are going to run at for what they are geared at. Also alittle more information on tha track you run at would help abit so someone can chime in on where you should start at as far as gearing/rollout is concern.
Hello and thank you for your help. Unfortunately there is no one running 12scale in our track and hoping I could spark things up a bit
Our track is indoor asphalt with med/high bite...our back straight is like 100-110feet long. Thanks in advance!!
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Old 09-10-2008, 01:07 AM   #29275
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Default GRP tires

Odpurple: thanks.

Another question. GRP tires seem to be specified in terms of shore rather than color. Which shore corresponds to which color? Does the following correspondence seem correct? 30 shore = gray, 32 shore = pink, 37 shore = magenta, 42 shore = purple?

Thanks.
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Old 09-10-2008, 07:35 AM   #29276
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Default Unity Tool Setup Jig

Does anyone know if the UNITY TOOL setup jig are still being manufactured, as well, if there are any online shops selling these units?

Thanks
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Old 09-10-2008, 08:41 AM   #29277
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Quote:
Originally Posted by Erik Aa View Post
Which shore corresponds to which color? Does the following correspondence seem correct? 30 shore = gray, 32 shore = pink, 37 shore = magenta, 42 shore = purple?

Thanks.

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Old 09-10-2008, 07:47 PM   #29278
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Well, I have finally pieced my CRC CK3.2R together to the point where I can start contemplating electronics. Seeing as how I have never raced 1/12 scale before, I plan on running 4-cell stock. I have a Futaba R133F receiver and S9601 steering servo, however, I'm having trouble deciding on a motor and ESC. For the time being, a brushless system is a bit beyond my budget so I'm looking for a good brushed stock motor; the Orion Core Stock and Trinity CO27 Pro, in particular, have caught my eye. As far as ESCs go, I've been looking at the LRP QC3, Tekin FX Pro, and the Novak GTX. I'm just not quite sure what is best for my application. Would anybody care to offer some advice?

Last edited by Sunshine86; 09-10-2008 at 07:59 PM.
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Old 09-10-2008, 07:50 PM   #29279
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Quote:
Originally Posted by WinnipegRacer View Post
Does anyone know if the UNITY TOOL setup jig are still being manufactured, as well, if there are any online shops selling these units?

Thanks
Contact Barry Hill at Gadgethill@aol.com He owns Hyperdrive/MSA and carrys them. They are great tools too!

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Old 09-10-2008, 08:21 PM   #29280
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Quote:
Originally Posted by Sunshine86 View Post
Well, I have finally pieced my CRC CK3.2R together to the point where I can start contemplating electronics. Seeing as how I have never raced 1/12 scale before, I plan on running 4-cell stock. I have a Futaba R133F receiver and S9601 steering servo, however, I'm having trouble deciding on a motor and ESC. For the time being, a brushless system is a bit beyond my budget so I'm looking for a good brushed stock motor; the Orion Core Stock and Trinity CO27 Pro, in particular, have caught my eye. As far as ESCs go, I've been looking at the LRP QC3, Tekin FX Pro, and the Novak GTX. I'm just not quite sure what is best for my application. Would anybody care to offer some advice?
All 3 of those are good choices and you can't go wrong with them. I've used the LRP QC2 and the Tekin FX in 1/12th stock. If you plan to go to a Spektrum system in the future I'd stay away from the LRP. Their BECs tend to be a tad too weak for the Spectrum recievers and many people have had problems with that. Also with my QC2 the metal contacts on the PC board where the wires solder in eventually delaminated from the board. With the QC3 built the same way I imagine that would happen on that one too. The Novak I believe has the smallest foot print but also the largest capacitor so overall the GTX and FX end up taking up about the same amount of space. I really like my Tekin FX but you have to get used to adjusting push or anti-drag on the ESC and not on the radio. Many people will bump up the throttle trim to adjust this but the FX will not let you do that. Also if you plan to go to BL before going to mod brushed then save yourself a bit of cash and get the regular FX not the Pro...unless you are running hot mods you'll have no need of the Pro.
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