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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 06-22-2007, 10:09 PM   #25906
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i heard it works real good.i am gonna try it at my next carpet race.i have all 3 bodies and i wanna try em back to back to back to see if i see any difference in lap times.
thats a good idea

even so, the b is the coolest looking lol
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Old 06-23-2007, 07:01 AM   #25907
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The 12b is a great mild mild handling body. great for stock and 19. as it doesn't scrub to much speed on the turns. espicially if your running on a track that runs TC also. I had great runs with the 12b last winter. I just found the zyteck to fit my driving a bit better at my home track as we run a 12 scale specific track you know 5-6 feet lanes. about 5 to 10 180's. As Protc3 mentioned try a couple different body out. and see what work better for your driving style. And use it as a tuning tool also.
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Old 06-23-2007, 08:13 AM   #25908
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Ive tried many different bodies the only one that I see that fits my driving style is the Speed 12 not the B
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Old 06-23-2007, 10:16 AM   #25909
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i will have to see what there all running, like at my out door track for tc they run all of the,..dna,mazda,nemisis, ALL of them
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Old 06-23-2007, 10:52 AM   #25910
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Default 13.5 gearing

Mr. Shookie, is that a 13.5 in your car? if so what teeth pinions/spurs are generally needed for carpet tracks with out of the box CRC Procuts?
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Old 06-23-2007, 01:42 PM   #25911
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Originally Posted by fast-ho-cars View Post
Mr. Shookie, is that a 13.5 in your car? if so what teeth pinions/spurs are generally needed for carpet tracks with out of the box CRC Procuts?
Cause of how much you have to gear it...
I am running with the box stock pro cuts and 86/34 (not sure of the roll out) that is just the biggest I can get in there right now...But if Jason is putting out a more brushless friendly rear pod....Then I might try gearing it even more.
You can gear the 13.5 to moon on 12th scale until you notice a drop in torque. Keep the temps below 175* and you should be fine...
I have to experiment some more....


Oh and cause I have had requests about the diff rings I had pictured, here is a link.
http://www2.towerhobbies.com/cgi-bin...&P=WR&I=LXS454
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Old 06-23-2007, 02:00 PM   #25912
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Originally Posted by Mr. Shookie View Post
Cause of how much you have to gear it...
I am running with the box stock pro cuts and 86/34 (not sure of the roll out) that is just the biggest I can get in there right now...But if Jason is putting out a more brushless friendly rear pod....Then I might try gearing it even more.
You can gear the 13.5 to moon on 12th scale until you notice a drop in torque. Keep the temps below 175* and you should be fine...
I have to experiment some more....


Oh and cause I have had requests about the diff rings I had pictured, here is a link.
http://www2.towerhobbies.com/cgi-bin...&P=WR&I=LXS454
-Shookie <><

thats good news! should be not to bad to gear
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Old 06-23-2007, 05:35 PM   #25913
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Quote:
Originally Posted by Mr. Shookie View Post
Oh and cause I have had requests about the diff rings I had pictured, here is a link.-Shookie <><
You mean it's not an prototype 2 speed tranny
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Old 06-23-2007, 08:50 PM   #25914
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Quote:
Originally Posted by protc3 View Post
i really am excited about the look and function of this car and i want it to get into the hands of the public.if it takes beating the bushes then so be it.
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Old 06-23-2007, 09:22 PM   #25915
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Quote:
Originally Posted by Mr. Shookie View Post
Cause of how much you have to gear it...
I am running with the box stock pro cuts and 86/34 (not sure of the roll out) that is just the biggest I can get in there right now...But if Jason is putting out a more brushless friendly rear pod....Then I might try gearing it even more.
You can gear the 13.5 to moon on 12th scale until you notice a drop in torque. Keep the temps below 175* and you should be fine...
I have to experiment some more....


Oh and cause I have had requests about the diff rings I had pictured, here is a link.
http://www2.towerhobbies.com/cgi-bin...&P=WR&I=LXS454
-Shookie <><

will the Kimbrough diff covers work on 64dp spurs as well? Tower's product description says 48dp though...
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Old 06-23-2007, 09:29 PM   #25916
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anyone here race at the stocktin indoor carpet track?
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Old 06-23-2007, 09:29 PM   #25917
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In a week or two Schumacher USA will have RW 64p spur gears in 78, 82 and 85 teeth in addition to the 88, 92, 96 and 100 teeth 1/12th gears they already stock.

These gears were created specifically to allow 1/12th racers to get the ratios they need for 13.5 and 10.5 BL racing.
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Old 06-23-2007, 09:34 PM   #25918
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Originally Posted by alana07 View Post
will the Kimbrough diff covers work on 64dp spurs as well? Tower's product description says 48dp though...
I am pretty sure they work for both, the only differance I am aware of between 48p and 64p it the pitch of the gear and of course overall diameter of the gear
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Old 06-23-2007, 09:40 PM   #25919
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Originally Posted by BlackedOutREVO View Post
anyone here race at the stocktin indoor carpet track?

That's Stockton, what do you want to know?
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Old 06-23-2007, 10:20 PM   #25920
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That's Stockton, what do you want to know?
oops

just wondering who here races there... wants get to kinda know whos there, so i know someone so im not a loner lol
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