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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 01-18-2003, 10:30 PM   #2206
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http://www.jphracing.com/Page.cfm

part # 180

$3.99
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Old 01-18-2003, 10:35 PM   #2207
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Thanks Avink1! Ordered some and they are on the way.
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Old 01-19-2003, 03:08 PM   #2208
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I have been racing TC (Impulse, Xray) for a few years. Recently a guy brought out a 1/12 car at my local indoor track and I thought that looks like fun. But at that time there were just a couple and not enough to race. Well, a few more started to show, so I bought a used Carpet Knife 3.0 from one of the guys. We raced, I came in dead last. I had to endure some trash talking and ribbing, but I had a ball. So I came here because I got some good advice reguarding the Xray when I first bought it, and read almost the whole 1/12 forum(took me a few days). I then bought a Bloody Knife from CRC. The setup info and tips given, especially by you Carpet knife drivers was invaluable. I threw in an Integy V10R (with tuning tips from Big Jim's forum.), and went to the track for some practice. That weekend I came in second in the qualifier and won the main. Since I thought it was a fluke(and so did everyone else, beginner's luck was whispered loudly) I didn't post. But I repeated the main win this weekend. And the peanut gallery was suddenly very quiet. Thanks guys. Very much. Reading IS fundamental.
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Old 01-20-2003, 03:49 PM   #2209
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Avink: I got that new front end on and tested it on Sunday...WAY better than the lowered angled blocks I was running, there is no push or oversteer, you should drive it next week.

Does anyone run the Raceway mfg. front end? does it even work in a 1/12, is it too heavy?

-Pete simons
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Old 01-20-2003, 05:34 PM   #2210
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pete, thats great to hear now you'll be kickin my ass. i can't make it next weekend, i have to go out for a steak dinner bummer huh, its my step-mom's b-day. i'll probably be able to race the next weekend but i'm not sure, oh well.
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Old 01-20-2003, 10:13 PM   #2211
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Hey fellas, I'm a real 1:12 scale noob but after a new indoor track has been built here in Tulsa I'm interested in a 1:12 racer. I'm leaning towards the new Yokomo since it's pretty much got everything, but want your alls advice as to if there's something out there that's cheaper that'll doesn't need upgrades out of the box.

Thanks!
Jits
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Old 01-20-2003, 10:54 PM   #2212
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Default 4-cell battery discharger

What are you guys using for discharging 4-cell packs? Does someone make a cut-off switch for these packs? How many bulbs should be used?

Last edited by Graphitedust; 01-23-2003 at 10:18 AM.
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Old 01-21-2003, 02:44 AM   #2213
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Default Kawada M300 RSW

What ESC do you use for a 1/12th car running on 4-cells? Most of the ESC I saw require 6-cells battery packs. The M300 RSW is such a car with only 4-cell slots.
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Old 01-21-2003, 03:12 PM   #2214
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Default Securing batteries in Yokomo SSG Chassis

How are the batteries retained in the new Yokomo SSG chassis? I don't notice any slots in the middle of the chassis to allow taping the cells two at a time. I also notice the rear deck has some tabs sticking out. Do they have anything to do with holding the cells in or is tape used from one side of the chassis to the other holding all four cells in at the same time?

I am interested in picking up this chassis for my 12L3 and would like to know as taping cells in that chassis is not fun!!!

Bob
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Old 01-21-2003, 03:16 PM   #2215
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Default Re: Kawada M300 RSW

Quote:
Originally posted by eizo
What ESC do you use for a 1/12th car running on 4-cells? Most of the ESC I saw require 6-cells battery packs. The M300 RSW is such a car with only 4-cell slots.
There are a bunch of speed controls that work fine on 4 cells. Some that I have seen include the Novak Cyclones, Cyclone2's, GT7's, the LRP Quantum Comps, the MTroniks M3 Cubics, Keyence Ao1's and Zero series, the GM V12 series and SX9, and of course any of the older Tekins.

I have seen or personally used all of these mentioned on 4 cells without a separate receiver pack.

Trips
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Old 01-21-2003, 03:33 PM   #2216
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Quote:
Originally posted by JitsuGuy
Hey fellas, I'm a real 1:12 scale noob but after a new indoor track has been built here in Tulsa I'm interested in a 1:12 racer. I'm leaning towards the new Yokomo since it's pretty much got everything, but want your alls advice as to if there's something out there that's cheaper that'll doesn't need upgrades out of the box.

Thanks!
Jits
I'd say anything 12L based because of parts, but I like and a lot of guys are running the newest Corally car.
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Old 01-21-2003, 07:08 PM   #2217
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Default Re: Securing batteries in Yokomo SSG Chassis

Quote:
Originally posted by Bobby Z
How are the batteries retained in the new Yokomo SSG chassis? I don't notice any slots in the middle of the chassis to allow taping the cells two at a time. I also notice the rear deck has some tabs sticking out. Do they have anything to do with holding the cells in or is tape used from one side of the chassis to the other holding all four cells in at the same time?

I am interested in picking up this chassis for my 12L3 and would like to know as taping cells in that chassis is not fun!!!

Bob
This is not SSG chassis, but I hope this movie help you.

http://www.kimihiko-yano.net/Movie/P30900361.MOV

or you can hold the batteries by this method.


http://gekiradan.fc2web.com/1217/Dscf1238.jpg

http://gekiradan.fc2web.com/1217/Dscf1241.jpg

Last edited by kiyano; 01-21-2003 at 07:11 PM.
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Old 01-22-2003, 02:17 AM   #2218
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Default 1990 1/12 EP iFMAR World Championship

The race that CAM motor and Chris Dorseck reign supreme and which Masami will never forget - I think:

I dusted my archives and found these slides. Got them digitize and here they are for your viewing pleasure: You will have to register with www.imagestation.com to view them.

Happy Viewing.
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Old 01-22-2003, 08:24 PM   #2219
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Quote:
Originally posted by JitsuGuy
Hey fellas, I'm a real 1:12 scale noob but after a new indoor track has been built here in Tulsa I'm interested in a 1:12 racer. I'm leaning towards the new Yokomo since it's pretty much got everything, but want your alls advice as to if there's something out there that's cheaper that'll doesn't need upgrades out of the box.

Thanks!
Jits

you can get a yokomo at www.speedworldraceway.com for 199.99 where an L3 cost 159.99. the yokomo is worth the money.
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Old 01-23-2003, 10:19 AM   #2220
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Default Re: 4-cell battery discharger

Quote:
Originally posted by Graphitedust
What are you guys using for discharging 4-cell packs? Does someone make a cut-off switch for these packs? How many bulbs should be used?
Second try.......anyone?
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