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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 07-31-2007, 08:46 PM   #26506
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Originally Posted by P2 View Post
Couldn't agree w/you more, at this years Nat's 1/12 19T had bfaster lap times than TC mod
yea p2 your car was going as fast a mod tc cars
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Old 07-31-2007, 09:12 PM   #26507
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I'm a newcomer but got hooked into racing big time about 2 years ago. TC started it all of course for me. Never saw or even knew about pan (12th or 10th) for 6 months. One of the racers brought a 1/12th out and let me try it. He did the same with a 10L3T. Game over

I now own 2 1/12th, 1 1/10 (pan), 2 TC's. I run the TC's only because thats where the racing is at my club. I bring my 12th out whenever I can and let guys have a go at it (the guys I kinda trust) in the hopes to convert them.

TC are like cinder blocks to me. I run practice laps with pan cars and I get goose bumps coming off the drivers stand.

We've been trying hard to get the class going again and it always peters out (club level). Not sure why. I think its the Nascar effect....people relate to TC suspension while pan is counterintuitive at first glance (I'm still don't get it - but can set it so I can mostly run between the boards).

Anyways, glad you guys see there an increased interest - hopefully this will trickle up here.

Trying 19T (dynasty) in my 3.1R for the first time in a few days. We got a 80X40'ish track with a mixed layout. How does 50-55mm (1.96" to 2.165") roll out sound? Always ran stock, never tried 19T. Need something to remember as I won't be able to carve laps for 3 weeks
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Old 07-31-2007, 09:46 PM   #26508
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Originally Posted by protc3 View Post
1/12th is getting bigger i feel because of the price of the high performance you get when you buy one.for $200-$300 you get a car that far exceeds the capabilities and handling of a $500 touring car.they are cheap to maintain and always a good time.honestly i would like to see 1/10th pan car replace TC.TC is just getting out of hand.
Quote:
Originally Posted by P2 View Post
Couldn't agree w/you more, at this years Nat's 1/12 19T had bfaster lap times than TC mod
Just got back from Beat the Heat race in Jackson Ms last weekend where we ran 1/10 tc Mod,19t,stock
1/10 Nitro
1/12th 19t
they clocked the tc mod at 45mph on the stright best lap time 15.6s
my 1/12th 19th best lap time 15.1 but they did not clock us on the stright.
a 1/10 pan car mod would of been in the mid 14 I bet (Paul is that 10l still at HT in the shop???)
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Old 07-31-2007, 10:10 PM   #26509
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Hey Tim, your 10l3 still sitting in HT.
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Old 07-31-2007, 10:15 PM   #26510
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Hey Tim, your 10l3 still sitting in HT.
HT?
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Old 07-31-2007, 10:37 PM   #26511
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HT = Hobbytown in San Antonio
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Old 07-31-2007, 10:41 PM   #26512
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I just ordered the new IRS arms and pivot balls today for my MX2...can't wait till they come in!
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Old 08-01-2007, 09:33 AM   #26513
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Default new hyperdrive car

hey all:does someone have pics and info of the new hyperdrive 12th pan car? Also what is the expected release date?Finally why is the hyperdrive web site not updated that often and with little info about their team members or their race results?Thanks for the info
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Old 08-01-2007, 12:45 PM   #26514
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Originally Posted by CaliberX View Post
I'm a newcomer but got hooked into racing big time about 2 years ago. TC started it all of course for me. Never saw or even knew about pan (12th or 10th) for 6 months. One of the racers brought a 1/12th out and let me try it. He did the same with a 10L3T. Game over
I think that's the point - TCs are in the shops, look like road sedans, and attract people. 12th doesn't make the average hobby shop, so no one sees them.
T
Quote:
Originally Posted by CaliberX View Post
rying 19T (dynasty) in my 3.1R for the first time in a few days. We got a 80X40'ish track with a mixed layout. How does 50-55mm (1.96" to 2.165") roll out sound? Always ran stock, never tried 19T. Need something to remember as I won't be able to carve laps for 3 weeks
V2 Dynasty - tyr around 54mm/rev. Laydown Dynasty, try anything between 45 and 50mm/rev - we have found a lot of speed at 45mm/rev even on a big track. HTH
Quote:
Originally Posted by protc3 View Post
1/12th doesnt evolve very often but it seems to be now.alot of different companies are really showing interest in the class and putting there all into it.its nice to see because it has always been and always will be an exciting class.
brushless is going to boost all electric classes.alot of guys have gone to nitro due to the battery issues that have been seen with the 4200's and the hassle of always cutting motors to stay competitive.with brushless here and getting stronger along with lipo making its mark,alot of guys are coming back to electric.
1/12th is getting bigger i feel because of the price of the high performance you get when you buy one.for $200-$300 you get a car that far exceeds the capabilities and handling of a $500 touring car.they are cheap to maintain and always a good time.honestly i would like to see 1/10th pan car replace TC.TC is just getting out of hand.
As said above, it is the familiarity with a TC in the shop that gets people in. Most people who go straight to 12th give up because they are finiky devils. Unless there is someone at the Club to set it up for you, it is easy to be put off - battery tape, additive, precise assembly, etc... - before you hit the track and find it doesnn't handle well, breaks, tweeks, etc...

Measure 12th against an Associated TC4 or B4 RTR (the best RTRs in the World) and it doesn't stack up. 10th pan car would be a terrible battery, horsepower and tyre war, and again not attractive to new drivers in the hoby shops.

12th survives because it is so stable on rules, cars, parts, tyres and cells. BL will help, but LiPo won't. Making big changes (like Mamba 18th BL motors and 7.4v LiPo, an awesome combination) makes the class less attractive because the development path is steep and costly. Keep 12th as it is, attract drivers from TC and Off-Road during the Winter, and it will continue to thrive. We'd all like it to be more popular, but TC is popular and look what's happening there. Be careful what you wish for...
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Old 08-01-2007, 01:10 PM   #26515
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Originally Posted by b-man777 View Post
hey all:does someone have pics and info of the new hyperdrive 12th pan car? Also what is the expected release date?Finally why is the hyperdrive web site not updated that often and with little info about their team members or their race results?Thanks for the info
Go to page 882 and see post made by Humpty. He's a team driver for Hyperdrive.

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Old 08-01-2007, 04:29 PM   #26516
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Originally Posted by CaliberX View Post
We've been trying hard to get the class going again and it always peters out (club level). Not sure why. I think its the Nascar effect....people relate to TC suspension while pan is counterintuitive at first glance (I'm still don't get it - but can set it so I can mostly run between the boards).
Flat out 1/12 is not productive for the hobby/track shops. These cars are very tough and can take hits that would cripple a TC. That results in less parts replaced and lower sales for the shop. This is the single biggest reason that the class is not promoted by the shop/track owners. On the other hand thay can be harder for a novice to drive due to the shorter wheelbase, so alot of newer drivers pefer the TC's as thay are eaiser to drive.
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Old 08-01-2007, 04:48 PM   #26517
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Originally Posted by InspGadgt View Post
I just ordered the new IRS arms and pivot balls today for my MX2...can't wait till they come in!
You're gonna like dem when they come in Even on both sides, just be sure to use alum/teflon coated balls.

Tim, Your 10L2 is still in....I sold mine after the USPCC in 05

CarlosG, The 10L3 is the narrow car....we talkin' wide baby!!!
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Old 08-01-2007, 05:10 PM   #26518
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Originally Posted by P2 View Post
You're gonna like dem when they come in Even on both sides, just be sure to use alum/teflon coated balls.

Tim, Your 10L2 is still in....I sold mine after the USPCC in 05

CarlosG, The 10L3 is the narrow car....we talkin' wide baby!!!
I just knew it was a 10L, just not sure which one it was.
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Old 08-01-2007, 05:17 PM   #26519
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Hey all, just a shameless little plug... all Slapmaster diff kits are now coming with a cool black anodized aluminum nut. Looks ultra stealth and ultra reliable.

Paul: hey it was great to meet everyone in Seattle for Nat's just a few weeks ago. OD and crew looked great all week as did Josh's Pro Wheels. It was great to run with dirvers who really enjoy 12th scale. A class group really. When Ralph's TC went up in smoke in A2, there was a "no" amungst the drivers when a 5 minute grace was asked for. When a 12th scale driver needed a minute to get a correct/clear tx/rx crystal in the car, everyone said: "sure".

12th scale looks just as exciting now as it did 21 years ago when I first picked one up. Now that it looks like we are on the horizon of b/l in many of the classes.... it looks like all we need to figure out is how to get a lipo strapped in. I haven't tried it yet, but it would be realistic to try a single cell lipo and a hot b/l as "the class". If it turned out to be about as fast as a 19t class, then it could satisfy the masses. We would likely have to run a rx pack to make the radio work, but just imagine just how simple a car could be? We could spend all our time tuning the chassis!!!

Brian- www.slapmastertools.com
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Old 08-01-2007, 05:31 PM   #26520
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Brian - just found out that your products are available to me through Canwest RC. My LHS (that funnel 95% of my rc dollar through as opposed to www) is checking to see what Korgea can do. Hopefully, all my 12th and the one 10th will be outfitted with your thrust bearings soon!!!
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