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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 01-14-2010, 04:30 PM   #33256
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Quote:
Originally Posted by CarbonJoe View Post
Not entirely true... for LiPo, if you set the cell count and capacity correctly, it will only allow you to charge up to 1C. The Checkpoint TC-1030 will allow you to go up to 2C for LiPo. For NiCD and NiMH, you can go to 8A on the ICE, 10A on the TC-1030.
I was implying that you'd be "tricking" the charger into thinking that there was a larger capacity battery being charged to use charge rates higher than 1C. Again, it could be done, but it's not a recommended practice.
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Old 01-14-2010, 04:46 PM   #33257
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now back to the rc4less orange tires, i run 1/12 13.5 with a tekin...smc batt...what tires work, the exotic rubber or the natural...and what shores are being used, thanks never used these before, they look promising
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Old 01-14-2010, 05:02 PM   #33258
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Originally Posted by RC MARKET View Post
DO you have see Market around 3 months will updated to new ver. ?
your battery used some months IR was high ,
we also for sell , change new one to keep power.
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Old 01-14-2010, 05:14 PM   #33259
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now back to the rc4less orange tires, i run 1/12 13.5 with a tekin...smc batt...what tires work, the exotic rubber or the natural...and what shores are being used, thanks never used these before, they look promising
I run at Horsham-I use exotic black rears 45 shore,exotic black fronts 50 shore.Jack for sauce,only the rims are orange,not the compound.I run 13.5 crc gen xl and a Bmi db12rr.If you are not too far from Horsham come up to play.the track is fairly large(100x40)the atmosphere is laid back,=FUN but competitive.
Jeff Cuffs,Shreffler,Fairtrace,Donnie Lia--ect ect run here regularly.If ya wanna go fast ya gotta see these guys.Some off the fastest guys and niceist guys on planet r/c.Check out the Horsham thread on the racing forum
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Old 01-15-2010, 04:53 AM   #33260
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Quote:
Originally Posted by TommyBlazin View Post
now back to the rc4less orange tires, i run 1/12 13.5 with a tekin...smc batt...what tires work, the exotic rubber or the natural...and what shores are being used, thanks never used these before, they look promising
I run on a medium size high bite very tech. track in Nash. TN We all run 17.5 but cheat our a$$ off with esc's so they run as fast as a 13.5. Most run the exotic rubber, Tan (35) rear, Black (45) front with Paragon (love that smell) The RC4Less tires seem to chunk way less than the Jaco's and the price ain't bad.
Don't jump up my a$$ Mr Jaco I'm just saying
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Old 01-15-2010, 07:16 AM   #33261
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Thanks Justme2, I was beginning to think I was the only person that could see my post lol. I'm leaning towards the CRC Gen XL and since I deal with Horizon Hobby in my Hobby Shop that'll work out great. Thanks again for the help.
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Old 01-15-2010, 09:43 AM   #33262
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seems i have lucked into a MMpro for an esc, its goin into a gen XL, 13.5 redline motor. Track size is 100x40 id say med hi traction smooth carpet.
As of now its set with a 79mm rollout

Lookin for a good baseline to start with as far as esc settings. Not really familiar with all the settings.

Thanks
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Old 01-15-2010, 09:56 AM   #33263
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Here are some tricks for foam tires. The brand doesn't matter. Use CS-Electronic side wall glue. It works great at keeping the sidewall flex down. Since I have been using it my tires don't chunk or peel. I can now get a lot of races out of one set. If you are having sauce issuse's use some lighter fluid where you don't want to pick up traction. If you only sauce half your tire, at the end of a race use lighter fluid on the the entire tire then sauce the half you sauced before. You won't pick up all the extra traction from the track that way. Every weekend I clean all of my tires with lighter fluid so any extra sauce doesn't soke in before I race again, This also helps with the chunking issue as the tires don't stay soft for a week before hitting the track again.

Also for those that are looking for doughnut's CS has them as well. Just hope you can understand German. I wish they had an english web site.

Hope this help's with the problems.

http://www.cs-shop.de/cms/ Use the search type in glue it's about the fourth thing down the page.
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Old 01-15-2010, 10:21 AM   #33264
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Is there a US source for this glue?
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Old 01-15-2010, 01:08 PM   #33265
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Is there a US source for this glue?
No unfortunatly there is not. You can buy from the site though. About $9.00 a bottle. You can goggle a curancy calculator to help give you the price in US dollars.
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Old 01-15-2010, 01:38 PM   #33266
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Yeh Chuck above got his from a large order I placed to CS directly a few months ago. Shipping was more expensive than the glue! So if you are going to order some... make sure you order a ton of it. Also since their site is not at all in English, you need to practice up on your German in order even complete the order process. (as the paypal site it sends you to is in German also)

I asked them of their plans to ship domesticly, and they said "Nope".

From all the CAs I tested on sidewalls... this stuff is the best.

So Chuck you going to be at the Track Sunday? Should be a good start to the series, more new people have 1/12ths.
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Old 01-15-2010, 02:24 PM   #33267
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3m weather striping adhesive--
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Old 01-15-2010, 03:00 PM   #33268
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Could someone please verify something for me.

Are there 2 versions of the BMI 12 scale, A DB12RR and 12RR ??

If so what is the major difference, that 1 fits lipo and brushless better?

Thanks

s
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Old 01-15-2010, 03:17 PM   #33269
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Originally Posted by Satish View Post
Could someone please verify something for me.

Are there 2 versions of the BMI 12 scale, A DB12RR and 12RR ??

If so what is the major difference, that 1 fits lipo and brushless better?

Thanks

s

Yes there are two vervions of the BMI car. The orignal DB12r and the updated DB12rr. Both will fit 1c lipo just fine but the new rr can be ordered with a lipo specific main chassis that has a recessed area for the lipo to sit down into. And yes one of the other areas addressed with the newer rr car was to center the brushless motor weight/rear pod. There are a couple of other changes/differences between the two versions but those are the most talked about.
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Old 01-15-2010, 05:35 PM   #33270
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Quote:
Originally Posted by Clegg View Post
Yeh Chuck above got his from a large order I placed to CS directly a few months ago. Shipping was more expensive than the glue! So if you are going to order some... make sure you order a ton of it. Also since their site is not at all in English, you need to practice up on your German in order even complete the order process. (as the paypal site it sends you to is in German also)

I asked them of their plans to ship domesticly, and they said "Nope".

From all the CAs I tested on sidewalls... this stuff is the best.

So Chuck you going to be at the Track Sunday? Should be a good start to the series, more new people have 1/12ths.
Hell ya! I have been waiting for this weekend for too long now.
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