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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 01-27-2013, 07:30 AM   #39136
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Hey guys im going to be getting my first on-road car soon. I am going to be getting a 1/12 pan car. I dont know which one too get. Should i get the Team associated rc12r5.2 or the Serpent s120 or the CRC xti? Thanks
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Old 01-27-2013, 09:23 AM   #39137
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Originally Posted by blitz98 View Post
Hey guys im going to be getting my first on-road car soon. I am going to be getting a 1/12 pan car. I dont know which one too get. Should i get the Team associated rc12r5.2 or the Serpent s120 or the CRC xti? Thanks
Any of the above will serve you well. Get the one that your local shop holds spares for.
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Old 01-27-2013, 09:50 AM   #39138
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All of them are the same? My hobbyshop holds all of the parts for the cars above. Which one is the best out of all of them three? There is no best?
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Old 01-27-2013, 09:57 AM   #39139
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I obviously prefer the XTi and the Calandra crew certainly keeps you up to date on all new items coming out and setups. With that said, no cars are bad at this point and it comes down to personal preference. Did I mention how much I really like my XTi's? :-)
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Old 01-27-2013, 10:25 AM   #39140
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Whats better between the team associated rc12r5.2 or the CRC xti? Serpent s120 has been eliminated
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Old 01-27-2013, 10:43 AM   #39141
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All the top cars have pretty much an equal chance of winning. What makes the difference driving well and having a good setup. With the CRC you will want to make sure and get small electronics as there is very little room on the chassis...but with today's electronics that isn't too hard to find. The CRC has what I consider to be the best shock in the industry right now. The AE has a lot more room for electronics and a really innovative shock design...but I find the shock comes apart too easy.
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Old 01-27-2013, 11:50 AM   #39142
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Open track day yesterday and I brought my Trinity MCR still with a Reedy FireHawk (27t ROAR 95 brushed) and 4 cell NiCd (2000mAh) to run. Was pretty close to the new cars on 17.5 but run time was only 8 minutes. LOL. The track shop had a AE 12R5.1 on sale $190, the new 12R5.2 at $230 and a CRC Xti at $190. I don't know if the CRC parts wall was three times bigger because it breaks more but I picked up the CRC anyways. (Prices are CDN and they had 13% off to offset the sales tax)

Also got some yellow rears and black front Pro-Cuts.



I will likely put a 17.5 in it first and a 13.5 later. Running 1s. Can anybody recommend gearing or rollout for a tight short track for these motors. I was looking at the Trinity D3.5 17.5 (yeah I know) and the 13.5 I have is a Reedy Sonic.



Thanks.


Sean
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Old 01-27-2013, 01:11 PM   #39143
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Quote:
Originally Posted by blitz98 View Post
Whats better between the team associated rc12r5.2 or the CRC xti? Serpent s120 has been eliminated
this should help
CRC Xti VS AE 12R5.2

i bought both of them and kept the 12R5.2
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Old 01-27-2013, 01:53 PM   #39144
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I am in desperate need of this part for my Serpent S120LT SER-411166 (diff spring washers)
I am located in Amarillo, TX (USA) I have checked w/ A Main Hobbies and Stormer Hobbies as well as Serpent USA and can not find them anywhere other then Japan. I am needing these for this weekend (February 2nd)

any and all help is greatly appreciated
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Old 01-27-2013, 02:24 PM   #39145
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Quote:
Originally Posted by SNIPR View Post
I am in desperate need of this part for my Serpent S120LT SER-411166 (diff spring washers)
I am located in Amarillo, TX (USA) I have checked w/ A Main Hobbies and Stormer Hobbies as well as Serpent USA and can not find them anywhere other then Japan. I am needing these for this weekend (February 2nd)

any and all help is greatly appreciated
I stuck the part number into google and got a hit at RC Mushroom. If that doesn't work out try getting hold of a Slapmaster kit, it's made to replace the cone and thrust washer set-up. (Get it from Slapmaster.)
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Old 01-27-2013, 02:54 PM   #39146
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Quote:
Originally Posted by SNIPR View Post
I am in desperate need of this part for my Serpent S120LT SER-411166 (diff spring washers)
I am located in Amarillo, TX (USA) I have checked w/ A Main Hobbies and Stormer Hobbies as well as Serpent USA and can not find them anywhere other then Japan. I am needing these for this weekend (February 2nd)

any and all help is greatly appreciated
Hope this helps mate .http://www.amainhobbies.com/product_...al-Rebuild-Set
Atleast it has what you need .
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Old 01-27-2013, 09:14 PM   #39147
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What 4.5 motor is best suited for 1/12 scale?
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Old 01-28-2013, 12:14 AM   #39148
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Thank you - they are in China, I am in USA. I will look into slapmaster's kit!

Quote:
Originally Posted by Radio Active View Post
I stuck the part number into google and got a hit at RC Mushroom. If that doesn't work out try getting hold of a Slapmaster kit, it's made to replace the cone and thrust washer set-up. (Get it from Slapmaster.)
Ya, I found that rebuild kit after I posted this. I am thinking this maybe my only choice.

Quote:
Originally Posted by No9 View Post
Hope this helps mate .http://www.amainhobbies.com/product_...al-Rebuild-Set
Atleast it has what you need .
I was told the CRC 4123 (CRC Belleville Spring Washer) would work but not the best fit...
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Old 01-28-2013, 12:57 AM   #39149
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currently running an 88mm roll-out with a blinky 13.5 sonic on an open medium size asphalt track. Im curious what everyone else is running for roll-out
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Old 01-28-2013, 05:40 AM   #39150
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Quote:
Originally Posted by EDWARD2003 View Post
What 4.5 motor is best suited for 1/12 scale?
I Really loved my Orion VST Pro 4,5T Motor at the last Worlds.

Regards Robert
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