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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 04-19-2006, 07:29 PM   #18181
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Quote:
Originally Posted by SPC Racer
where can i get 16ga wire? and is it really nessecary to have?
I wouldn't say it's flat out needed but it's very helpful! You can get away with 14awg if you pay very special attention to how you route the wires around the pod. I have used the 16awg for years and it really takes the guess work out of it. I want to say I am using Tamiya wire at the moment, just whatever I found laying about.

The best stuff is from Novak but you usually need to bump into a Novak guy to get it =)

Nick
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Old 04-19-2006, 08:04 PM   #18182
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Quote:
Originally Posted by SPC Racer
where can i get 16ga wire? and is it really nessecary to have?
www.cheapbatterypacks.com

www.airdyn.com

www.castlecreations.com

The Castle Creations stuff is the smallest (very thin jacket) but they no longer show it on the website. I understand they will special order it for you (I guess I'll find out when I use up my supply )
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Old 04-20-2006, 02:54 PM   #18183
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My LHS carries and all the local racers use the Astro Flight 16g wire. You can get it from Horizon Hobby in 3ft or 10ft packs of red+black.
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Old 04-20-2006, 04:41 PM   #18184
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best place is the http://www.robotmarketplace.com/marketplace_wire.html for the deans 16 ga in black and red.
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Old 04-20-2006, 05:41 PM   #18185
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Default Asphalt help

Adrian....speedxl...SOMEBODY!!!!
i need some asphalt help with a 12L4 chassis. 1)do i run the servo flat or angled and why? 2)is there a set-up for in-line steering knuckles or should i take 'em off and use trailing? 3) what's a dailed and CONSISTANT t-bar set-up? 4)I'm running an LRP 7.1 speed with 3300's. will an Rx pack hurt or help? runtime has not been an issue. 5)my current traction compound can NOT get the job done (Racer's Choice TQ mod #7019), what works well on TRC pinks (regular foams)? 6)the blue center spring feels kinda stiff is this ok?

these questions may have been asked before and i'm sry for the re-peat, but i have just aquired this car....thanx!
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Old 04-20-2006, 08:29 PM   #18186
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Adrian....speedxl...SOMEBODY!!!!
i need some asphalt help with a 12L4 chassis.

Here is the really short answer: Run what came in the RC12L4 Kit Box and you will be dialed!!!

Here is a more detailed answere...

1)do i run the servo flat or angled and why?

Angled because this give you the best bump steer (none) and Ackerman (very little) for racing on asphalt. A flat servo will make you car more aggressive and its a real bear to dial out the bump toe in.

2)is there a set-up for in-line steering knuckles or should i take 'em off and use trailing?

In line knuckles make 1/12th cars undriveable. Only oval guys use them from time to time. Use only the stock trailing axles.

3) what's a dialed and CONSISTENT t-bar set-up?

For asphalt....063" t-bar, mounted with the two outer screws. This will yield a smooth fast car. Three screws will give you more turn in but the car will be darty and it will be hard to get consistent lap times.

4)I'm running an LRP 7.1 speed with 3300's. will an Rx pack hurt or help? runtime has not been an issue.

If you run stock or 19T don't bother with a receiver pack. They only give you an additional 5 sec of motor run time. If you run Mod get one.

5)my current traction compound can NOT get the job done (Racer's Choice TQ mod #7019), what works well on TRC pinks (regular foams)?

Use Paragon Ground effects on the full rear and inner half on the front. Wait 15min and apply a layer of cheap spf 45 suntan lotion on the same areas you put the Paragon on. Wait 30min. Wipe the tires 5 min before you race until they are as clean as you can get them. Suntan lotion may sound crazy but this is EXACTLY what Masami, Josh Cyrul, Mike Blackstock, etc do on asphalt. NOTHING else works as well.

6)the blue center spring feels kinda stiff is this ok?

If you race 1/12th with a t-bar car you should only own two springs. Olive for asphalt and silver for carpet...thats it! Everything else is only used on link cars or side shocks on oval cars.

these questions may have been asked before and I'm sry for the re-peat, but i have just aquired this car....thanx!

No problem...go get em'!
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Old 04-20-2006, 08:32 PM   #18187
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Nash, how about the 20 gauge? too thin?
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Old 04-20-2006, 08:33 PM   #18188
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FYI, SpeedXL will disagree with me on the servo mounting but he's wrong. He is a great driver (yes, better than me) but I am a better setup guy

The only reason I can run with him sometimes is that my cars are always dialed.
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Old 04-20-2006, 09:05 PM   #18189
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AdrianM, could you post general setup for asphalt using either dampner tubes or dampner disks that can be a starting point to use on any track?
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Old 04-20-2006, 10:03 PM   #18190
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Quote:
Originally Posted by AdrianM
FYI, SpeedXL will disagree with me on the servo mounting but he's wrong. He is a great driver (yes, better than me) but I am a better setup guy

The only reason I can run with him sometimes is that my cars are always dialed.

After reading your posts for a while now I've deceided I'm never going to buy a Schumacher product. Thanks for saving me money!
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Old 04-20-2006, 10:12 PM   #18191
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For Carlos G.

Front Tires: Purple
Tire Dia: 1.70
Tire Sauce: Inner 1/2 Paragon(15min) then inner 1/2 Suntan lotion (30min)
Spring: .020"
King Pin Lube: none
Camber: 1.5deg (adjust to waer evenly)
Caster: 2 shims back
Servo mounting: Angled
Ride Height: 3.5mm
Droop: .5mm

Rear Tires: Pink
Tire Dia: 1.80"
Tire Sauce: Full Paragon(15min) then Full Suntan lotion (30min)
Center Spring: Olive
Center Shock Oil: 30wt
T-bar: .063"
T-bar mounting: 2 screws
Damper Plate Lube: 5000wt 1/8th buggy diff silicone
Damper Tube Lube: Trinity Red Stuff
Ride Height Center: 3.5mm
Ride Height Rear Rod: 3.5mm
Droop: 2mm
Diff Lube: Stealth

Body: Protoform Speed 12 Standard not "B"
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Last edited by AdrianM; 04-20-2006 at 11:17 PM.
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Old 04-20-2006, 10:17 PM   #18192
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Quote:
Originally Posted by Ike
After reading your posts for a while now I've deceided I'm never going to buy a Schumacher product. Thanks for saving me money!
Wow...Whats that all about? I don't think I have been anything but helpful to anyone that asked a question. If its about the post you quoted SpeedXL and I are buddies and we razz on eack other all the time. He will read it soon and come up with a snappy comback in a day or two...lol!
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What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
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Old 04-20-2006, 10:19 PM   #18193
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Hi Adrian,

Is this purely a mod setup?
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Old 04-20-2006, 10:20 PM   #18194
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Quote:
Originally Posted by Ike
After reading your posts for a while now I've deceided I'm never going to buy a Schumacher product. Thanks for saving me money!
Pssh...It took you reading his posts for a while to decide....LOL

just kidding Adrian seems like a cool, helpful guy from my side of the computer screen though
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Old 04-20-2006, 10:24 PM   #18195
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Quote:
Originally Posted by AdrianM
Wow...Whats that all about? I don't think I have been anything but helpful to anyone that asked a question. If its about the post you quoted SpeedXL and I are buddies and we razz on eack other all the time.
I guess it's just the way you come off sometimes. Not trying to be a jerk (sometimes I don't have to try it just comes natuarally )just calling it like I see it. Perhaps in this instance I'm off base and you're just razzing a friend. However I said what I did as a result of other posts in the past as well.
Perhaps it's unfair to judge someone based on their internet persona but it's all I have to go on at this point.
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