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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 01-06-2009, 08:16 PM   #30241
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Steve - i've tried both edge types -- it doesn't really matter with Jaco Yellows . i've tricked myself in believing that square rear tire edge seems to carry more corner speed.
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Old 01-07-2009, 12:10 AM   #30242
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Quote:
Originally Posted by Trips View Post
I just emailed Jari, sent a paypal, and the parts came a couple days later.
Jari is on top of it. Always speedy service.
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Old 01-07-2009, 01:43 AM   #30243
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Im sorry, but who is Jari? Also, I measured a 13.5 motor and it was 2.1 inches long. My current brushed motor is 2.075 inches long. Seems to me that these would be almost identical, and would not affect balance. Is the weight balance off internally in these?
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Old 01-07-2009, 03:39 AM   #30244
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Jari is Jari Taskila designer and producer of the FF07 chassis. Website at

http://www.ffrcconcepts.com

The overall length of the motors is close, but the brushed motor concentrates most of its weight in the can, toward the right side of the car. The armature stacks, and all the copper wire is down toward the shaft end, the endbell end is basically a hollow plastic shell. The weight of the brushless motor is more evenly distributed over its full length. The balanced pods move the brushless motor several millimeters to the right to compensate.
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Old 01-07-2009, 04:08 AM   #30245
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Quote:
Originally Posted by andrewdoherty View Post
I used to match and buy loads of AE springs all the time too. Then a buddy turned me onto the BMI linear springs. They haven't collapsed on me yet (two months of constant racing) and they are only a dollar more a pair. One of the best purchases I made this year. FYI
I'll give them ago, hopefully they are better than the AE/CRC springs..
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Old 01-07-2009, 04:54 AM   #30246
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Quote:
Originally Posted by bs6ef View Post
I'll give them ago, hopefully they are better than the AE/CRC springs..
or you can buy windtunnelracingproducts.com 1/12th "babies" front springs. their 0.018" white springs are so much better than ASC. you can easily run a bunch of club race weekends without replacing/shimming
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Old 01-07-2009, 07:46 AM   #30247
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Default Team Tamale parts

some new team tamale parts for 1/12 cars

pic1: Inline steering blocks for SpeedMerchant Pro10
pic2: Assoc 12r5/10r5 Motor side bulkhead
pic3: Inline steering blocks for SpeedMerchant Rev5
pic4: Rev5/Pro10 bulkhead set. i believe that the design has changed a little.
Attached Thumbnails
1/12 forum-formulapro10steeringblocks-inline.jpg   1/12 forum-rc12-5rmotormount.jpg   1/12 forum-rev5steeringblocks1.jpg   1/12 forum-speedmerchant-bulkheads.jpg  
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Last edited by theisgroup; 01-07-2009 at 09:55 AM.
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Old 01-07-2009, 08:56 AM   #30248
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Interesting on the pro10 inline blocks. Also if you want to run inline blocks Bruce has been using the standard associated ones from the ae dynamic strut front end and using a longer kingpin that is from the rear inner hingepin of a b2/b3.

Part numbers:

Inline steering blocks asc8441
Inline axles asc8443
B3 rear inner hinge asc9260
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Old 01-07-2009, 03:33 PM   #30249
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I know many would disaprove from doing so, but wouldnt milling alittle material off the inside of the right pod move it over just enough to get the balance right.
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Old 01-07-2009, 03:42 PM   #30250
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Doubtful. The rebalanced pods that I have seen thus far have been moved over 4mm which I think is more then most motor plates are thick.
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Old 01-07-2009, 03:49 PM   #30251
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Ok, how does this affect the rear axle? wouldnt it make it wider on one side since the overall pod is wider?
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Old 01-07-2009, 04:00 PM   #30252
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Quote:
Originally Posted by mauromj View Post
Ok, how does this affect the rear axle? wouldnt it make it wider on one side since the overall pod is wider?
It's the same axle but, a different right hub is used that pulls the right wheel in to the left to keep all that centered.
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Old 01-07-2009, 04:12 PM   #30253
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Ok, I see. So is there any company that makes a convesion? I was looking at crc since the l4 shares the same t-plate as the t-fource. I dont think they make a conversion? Only for the gen x? Also I was checking out hotbodies because isnt there pod based off the l4 t plate?
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Old 01-07-2009, 05:39 PM   #30254
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Quote:
Originally Posted by mauromj View Post
Ok, I see. So is there any company that makes a convesion? I was looking at crc since the l4 shares the same t-plate as the t-fource. I dont think they make a conversion? Only for the gen x? Also I was checking out hotbodies because isnt there pod based off the l4 t plate?
Full Throttle Motorsports is in the process of putting out a new T-bar car that has a rear pod designed for brushless motors. That should convert the car but, if you're going to do the whole rear pod, you might as well buy the entire kit. I don't know how long until they sell the parts separate anyway.
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Old 01-07-2009, 05:41 PM   #30255
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The Hot Bodies is similar but I'm not sure the bolt pattern is the same. I remember seeing a new CRC prototype somewhere using the GenX rear pod on the T-Force so you might be able to get a conversion that way. Many manufacturers have made conversions for their own specific cars.
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