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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 08-29-2014, 04:27 AM   #41236
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Originally Posted by c-lyon View Post
Help please.
Are, or were, there any 1/12 link chassis where the front plate had no lightening holes? Thanks.
The SpeedMerchant Rev 7 had minimal openings around the front of the chassis, where there is a small cutout just to clear the servo saver; and a larger one under the LiPo that I use to key the Lipo to the chassis. While that's not NO holes, it's still very stiff and rugged:

http://www.rctech.net/forum/9629061-post1.html

http://www.rctech.net/forum/11499402-post424.html

The SpeedMerchant Rev 6 was even more solid, but wider (and, if I remember correctly, did not have the pod updated for brushless):

http://www.redrc.net/2010/04/speedme...6-112th-scale/
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Last edited by howardcano; 08-29-2014 at 05:01 AM.
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Old 08-29-2014, 04:56 AM   #41237
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Originally Posted by c-lyon View Post
Help please.
Are, or were, there any 1/12 link chassis where the front plate had no lightening holes? Thanks.
Quote:
Originally Posted by howardcano View Post
The SpeedMerchant Rev 7 had minimal openings around the front of the chassis, where there is a small cutout just to clear the servo saver; and a larger one under the LiPo that I use to key the Lipo to the chassis. While that's not NO holes, it's the most solid chassis I've ever seen, very stiff and rugged.

http://www.rctech.net/forum/9629061-post1.html

http://www.rctech.net/forum/11499402-post424.html
The new Xray X12 2015 claims to have smaller front cutouts to help make the front end stiffer, but I don't know how that compares with what you're looking for.
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Old 08-29-2014, 05:01 AM   #41238
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At the risk of being flamed for not searching on this (I did try), what are some of the popular ESCs right now in 1/12th scale? I just picked up a car and need to get the electronics for it. I'd prefer a 1 cell speedo so I can avoid the receiver pack.

Thanks in advance.
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Old 08-29-2014, 05:47 AM   #41239
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My favs are the hobbywing 1s esc and the gforce/skyrc 1s esc.
These have the switch, caps and boosted built in. Therefore easier to fit (not much space on some cars) and also tidier!
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Old 08-29-2014, 07:18 AM   #41240
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Originally Posted by Qball41 View Post
At the risk of being flamed for not searching on this (I did try), what are some of the popular ESCs right now in 1/12th scale? I just picked up a car and need to get the electronics for it. I'd prefer a 1 cell speedo so I can avoid the receiver pack.

Thanks in advance.
The ORCA VX1 has no need for a receiver pack or booster. Its smaller than some of the others that have boosters built in as well and much much lighter. It does have external caps but even with the cap mounted to the side its still lighter and smaller than the others with built in caps.

EA
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Old 08-29-2014, 07:20 AM   #41241
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Originally Posted by Qball41 View Post
At the risk of being flamed for not searching on this (I did try), what are some of the popular ESCs right now in 1/12th scale? I just picked up a car and need to get the electronics for it. I'd prefer a 1 cell speedo so I can avoid the receiver pack.

Thanks in advance.
Orion 1s ESC 65101
Hobbywing 1s v3.1
Viper VTX1
Gforce 1s
Airtronics super vortex zero
LRP Flow works team
Speed Passion Reventon Pro 1.1 EX 1s
Orca VX-1 1s
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Old 08-29-2014, 09:08 AM   #41242
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I like the viper VTX 1 for it can run 2S, some of the 1S ESC can only run 1S. With the viper I can put it in my touring car or F1 if I need to. I actually keep one in my pit bag as a spare just for that reason, with the VTX 1 I am covered if I blow up a ESC at the track no matter what car it is.
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Old 08-29-2014, 09:12 AM   #41243
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Originally Posted by avink007 View Post
Orion 1s ESC 65101
Hobbywing 1s v3.1
Viper VTX1
Gforce 1s
Airtronics super vortex zero
LRP Flow works team
Speed Passion Reventon Pro 1.1 EX 1s
Orca VX-1 1s
The Sanwa(Airtronics) does not have a booster. It is meant to be used with their receiver and servo, both of which will run on 1s.
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Old 08-29-2014, 09:33 AM   #41244
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The Sanwa(Airtronics) does not have a booster. It is meant to be used with their receiver and servo, both of which will run on 1s.
A friend of mine uses super vortex zero rx472 but no sanwa servo, his car run absolutely fine in 1s 4.5t with turbo
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Old 08-29-2014, 11:17 AM   #41245
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The Sanwa(Airtronics) does not have a booster. It is meant to be used with their receiver and servo, both of which will run on 1s.
I don't own one but I read the manual. It lists 1s or 2s lipo input and 6.0v 3 amp BEC, the only compatibility that is mentioned is with the SSL that allows changes and telemetry to be monitored from the radio will only work with an Airtronics/Sanwa receiver and radio system. A 94761 servo is rated for 4.8v or 6.0v, not 3.7 and as an example the JR 3650 is also rated for 4.8v or 6.0v. I'm just curious where you are getting your info from?
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Old 08-29-2014, 11:26 AM   #41246
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Originally Posted by EAMotorsports View Post
The ORCA VX1 has no need for a receiver pack or booster. Its smaller than some of the others that have boosters built in as well and much much lighter. It does have external caps but even with the cap mounted to the side its still lighter and smaller than the others with built in caps.

EA
Agreed. Awesome ESC for 1/12. The latest firmware is really nice as well. I've noticed a huge difference in !s performance.

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Old 08-29-2014, 11:35 AM   #41247
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I plan to run the Orion R10 1S ECS. Will this be competitive in stock? What software update is recommended?

Frank
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Old 08-29-2014, 11:35 AM   #41248
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Originally Posted by avink007 View Post
I don't own one but I read the manual. It lists 1s or 2s lipo input and 6.0v 3 amp BEC, the only compatibility that is mentioned is with the SSL that allows changes and telemetry to be monitored from the radio will only work with an Airtronics/Sanwa receiver and radio system. A 94761 servo is rated for 4.8v or 6.0v, not 3.7 and as an example the JR 3650 is also rated for 4.8v or 6.0v. I'm just curious where you are getting your info from?
I own one. The servo to use(that will fully utilize the M12 capabilities) is the Sanwa SRG-HS(94972). It is rated for one cell use, nominal voltage input 3.7V.

The M12 displays receiver voltage, it is battery voltage when using the vortex with one cell. Unless there is a setting for the bec that I have not found, it does not have a booster circuit.
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Old 08-29-2014, 11:50 AM   #41249
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Cool

That's a really nice looking 1s esc
and...
It doesn't require an additional box to adjust



Added to "The List"
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Old 08-29-2014, 11:54 AM   #41250
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I plan to run the Orion R10 1S ECS. Will this be competitive in stock? What software update is recommended?

Frank
Yes, 100% just as fast as everything else.
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