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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 02-06-2008, 05:47 PM   #28141
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Originally Posted by CREWMAN View Post
This may seem dumb but i get annoyed ( mainly at myself) when i buy a car and its good that day but the next day the company comes out with somthing new. I don't know why i guess i have a thing for the latest and greatest. My question is is the CRC Gen-x or the BMI 1/12 scale going to be soon replace with newer stuff. I realize the both cars are awesome and both would be a dream to have But For example if the Gen x 2 comes out in a month I can wait.
Our car may get some cool upgrades over time but it will all be stuff that can be bolted on. I dont believe in changing the car every year. Revisions are 1 thing but the car will always be able to be updated. The car itself will not undergo any serious changes that will require a whole new purchase. We spent our time in R&D to avoid such things.
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Old 02-06-2008, 07:11 PM   #28142
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Default BD12R

Protc3 this is great to hear that you have made a car that you can just bolt on the updates without having to buy a complete new car. This is what this hobby needs. I know I do not have deep pockets to buy a new car every year.

I am in the market for a 12th scale car after being out of RC Racing for over 6 years and your car sounds like a car I will be looking at. How do I go about finding a dealer or get information on this car?

Is the BD12R able to use BL systems?
Is this car a good indoor carpet car?
Do I need to by a lot of hop ups to make it race ready?
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Old 02-06-2008, 08:13 PM   #28143
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Default best motor

hey Iam running stock and 19turn wanted to know what motor you guys sugg for both.
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Old 02-07-2008, 12:41 AM   #28144
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love to see one more car out there.

http://www.redrc.net/2008/02/serpent...240/#more-7711

Last edited by Taz_S; 02-07-2008 at 12:41 AM. Reason: http://www.redrc.net/2008/02/serpent-s500-s120-and-s240/#more-7711
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Old 02-07-2008, 12:46 AM   #28145
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here one more
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Old 02-07-2008, 01:47 AM   #28146
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Taz you already saw this care in action last weekend not with those cool wheels but from all the pictures I've seen it's just like Yuri's ff07.
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Old 02-07-2008, 04:14 AM   #28147
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Quote:
Originally Posted by GSP View Post
Protc3 this is great to hear that you have made a car that you can just bolt on the updates without having to buy a complete new car. This is what this hobby needs. I know I do not have deep pockets to buy a new car every year.

I am in the market for a 12th scale car after being out of RC Racing for over 6 years and your car sounds like a car I will be looking at. How do I go about finding a dealer or get information on this car?

Is the BD12R able to use BL systems?
Is this car a good indoor carpet car?
Do I need to by a lot of hop ups to make it race ready?
Our car has been working extremely well on both asphalt and carpet. Our car made 2 out of the 3 A mains at the snowbirds this past week and finished 2nd in stock. We only had 1 factory driver in each class of 1/12th and 2 of the 3 made the A main and the 3rd one made the B main.

You can have your LHS contact us if you would like to buy from them. I really prefer this because i want to help support the LHS as much as i can. If they do not want to do so then you can always purchase through our online store at bmiracing.com.

Our car comes with alot of the cool upgrades such as titanium front axles,IRS center shock, Boca bearings, Nickle teflon pivot balls and ball studs ect. There is only minor upgrades that we offer at this time. We wanted to include as much as possible with your initial purchase.

Let me know if you have any more questions.
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Old 02-07-2008, 04:57 AM   #28148
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I forget to answer your question on BL. Yes, the rear pod was designed for the use of brushed/brushless with no problems.
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Old 02-07-2008, 08:49 PM   #28149
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Is it possible to use the 69 tooth spur for the TC3 on the 12L4?
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Old 02-10-2008, 04:30 PM   #28150
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On a 12L4 what differences are there between mounting the servo on the mounts as opposed to mounting it flat on the chassis?
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Old 02-10-2008, 06:52 PM   #28151
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What gearing/rollout do I use for a 13.5 bl motor as a starting point in my 12th scale with Jaco Prisms?
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Old 02-12-2008, 02:09 PM   #28152
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hi everyone....

dont forget, if you are into ceramic 12th diff balls...

Dave at Axiom has the best in my opinion...
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Old 02-12-2008, 05:37 PM   #28153
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CRC GEN-X FOR SALE
This car has only one race on it. The car has a open-X rear end, the long pillow balls, Ti. turnbuckles,Ti Front screws, ceramic bearings, Slapmaster bumper and thrust bearing, and ceramic balls. The chassis is sanded and sealed by Mike Odonnell. This car is awesome, it only has the snowbirds on it. The chassis is perfect. The car will come with a Komodo 19t and a Cobalt 27t motor, and nice painted body. I am asking $175 for this car. I only accept Paypal and will only ship in the lower 48 states. If you have any question, or would like to see pics email me at Jon@vgsportsinc.com
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Old 02-13-2008, 03:27 PM   #28154
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Quote:
Originally Posted by Maybell View Post
hi everyone....

dont forget, if you are into ceramic 12th diff balls...

Dave at Axiom has the best in my opinion...
Quote:
Originally Posted by IMTK422 View Post
CRC GEN-X FOR SALE
This car has only one race on it. The car has a open-X rear end, the long pillow balls, Ti. turnbuckles,Ti Front screws, ceramic bearings, Slapmaster bumper and thrust bearing, and ceramic balls. The chassis is sanded and sealed by Mike Odonnell. This car is awesome, it only has the snowbirds on it. The chassis is perfect. The car will come with a Komodo 19t and a Cobalt 27t motor, and nice painted body. I am asking $175 for this car. I only accept Paypal and will only ship in the lower 48 states. If you have any question, or would like to see pics email me at Jon@vgsportsinc.com
Anybody got anything else to advertise???
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Old 02-13-2008, 06:16 PM   #28155
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Anybody got anything else to advertise???
why yes yes i do

BUY A GEN-X


thank you
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