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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 01-10-2007, 10:34 PM   #23071
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Quote:
Originally Posted by Ffejdat
Morosis, what track are you racing at? the Barn, or something down by Rochester? Always looking for new tracks...
Yep, at the barn. www.thercbarn.com This has been my first venture into 1/12 scale and it's been a blast so far.
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Old 01-10-2007, 11:10 PM   #23072
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Quote:
Originally Posted by AdrianM
Here in Florida we run 19T 1/12th. Most are too scared to run Mod and 27T is too slow for the tracks we run on (~140'x70').

However up North US drivers run on 60'x40' tracks (or smaller), on carpet with traction compound where you lift to half throttle for hairpins which are just the end of a 2" pipe. 27T motors seem pretty fast, 19T are REALLY fast and Mod is only for guys like Cyrul and Blackstock.

Oh and we run roll throttle (car rolls slowly at neutral trigger) all the time in 27T and 19T.
I tried 2 years ago to have everyone run mod and they all voted down the idea.
Maybe we'll take advantage of minnregg and see if a few brave souls will run mod.

I am sure Jason, Marcos, You, Tim Potter , and I can get Boylen to set us up in a mod class!
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Old 01-10-2007, 11:34 PM   #23073
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Can anyone please explain me the advnatage of using the 2 stage tires from Jaco? Or when it's best to use them?

Thank you

Nick
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Old 01-11-2007, 12:32 AM   #23074
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Gang,
I've got some good news and not so good news.

First off, local web designer, Wes Briscoe is building up a new website for me that is gonna rock. It will have lots of product info, ordering info, tech info, set up sheets, contact info and links to retail dealers that carry my products. I am hopeful that the site will be up in a week or so. After two years of a stagnant page, this will be a very welcome sight!

Now for the bum news: My new Flex Plate was due to come from the hardening shop today when in fact a call came claiming that the oven was set too high and all the plates melted causing a total loss. The shop claimed financial responsibility and will reimburse me for the loss of the parts. But I will have to start over and have the plate recreated. This will be a minimum of two months. Of course Snowbirds and Nat's will be relived over pitchers of beer on barstools across the country by this time. I have never had such an investment be melted down in a kiln before, not only of research, developement, production cost and the utimate... sales that will never be known. The moral to this story: do this kind of stuff during the off season when time is not critical.

I am still very much looking forward to Snowbirds. Not only to race, but to get to meet everyone here and get caught up with those I already know. I definitely want to see all these new cars!
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Old 01-11-2007, 04:20 AM   #23075
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Quote:
Originally Posted by speedxl
I tried 2 years ago to have everyone run mod and they all voted down the idea.
Maybe we'll take advantage of minnregg and see if a few brave souls will run mod.

I am sure Jason, Marcos, You, Tim Potter , and I can get Boylen to set us up in a mod class!
adrian and i have been trying to get a 1/12th mod class going on asphalt.end result was it was me vs. adrian. we went back to 19 turn.im all for mod.unfortunately i will be practicing for the snowbirds this weekend so i will be running stock.
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Old 01-11-2007, 05:15 AM   #23076
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sorry to hear about that brian, it looked like you were going to have a really awesome product at the perfect time of year....

i'm running some neutral roll in 19 turn 12th scale as well....it's something i would use in 10th scale offroad all the time when running on a slippery track. it keeps the weight transfer from happening too fast and keeps corner speed up, especially with a stock or 19 turn motor. i've had a couple of guys tell me to take the "creep" out of the car because it will be easier to drive....i can't drive the car without it!!!
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Old 01-11-2007, 12:41 PM   #23077
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Quote:
Originally Posted by protc3
adrian and i have been trying to get a 1/12th mod class going on asphalt.end result was it was me vs. adrian. we went back to 19 turn.im all for mod.unfortunately i will be practicing for the snowbirds this weekend so i will be running stock.
Maybe after the Birds, I am definatlly up for mod, just hate to know you and Adrian probly got Brushless motors And dont. Maybe a class rule for fairness is only brushed

Actually I would even like to play around alittle with adjustable hand wound 19t's they can be really fast!
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Old 01-11-2007, 01:51 PM   #23078
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Quote:
Originally Posted by protc3
adrian and i have been trying to get a 1/12th mod class going on asphalt.end result was it was me vs. adrian. we went back to 19 turn.im all for mod.unfortunately i will be practicing for the snowbirds this weekend so i will be running stock.
Hey Jason I finally got it balanced with the gtb with out adding anymore weight!


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Old 01-11-2007, 06:08 PM   #23079
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Quote:
Originally Posted by Slapmaster6000
Gang,
I've got some good news and not so good news.

First off, local web designer, Wes Briscoe is building up a new website for me that is gonna rock. It will have lots of product info, ordering info, tech info, set up sheets, contact info and links to retail dealers that carry my products. I am hopeful that the site will be up in a week or so. After two years of a stagnant page, this will be a very welcome sight!

Now for the bum news: My new Flex Plate was due to come from the hardening shop today when in fact a call came claiming that the oven was set too high and all the plates melted causing a total loss. The shop claimed financial responsibility and will reimburse me for the loss of the parts. But I will have to start over and have the plate recreated. This will be a minimum of two months. Of course Snowbirds and Nat's will be relived over pitchers of beer on barstools across the country by this time. I have never had such an investment be melted down in a kiln before, not only of research, developement, production cost and the utimate... sales that will never be known. The moral to this story: do this kind of stuff during the off season when time is not critical.

I am still very much looking forward to Snowbirds. Not only to race, but to get to meet everyone here and get caught up with those I already know. I definitely want to see all these new cars!

That realy sucks BB.
Alot of good to bust your butt.
Well we'll have some fun at Ron's.
The best things take time.
Hey by the way , have you signed up yet for Ron's race?
I haven't seen your name on Ron's list.

Darrell
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Old 01-11-2007, 06:46 PM   #23080
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Quote:
Originally Posted by nnick
Can anyone please explain me the advnatage of using the 2 stage tires from Jaco? Or when it's best to use them?

Thank you

Nick
Its like running bigger rims with trued down foam. This lets you run softer compounds for more steering and forward bite while making the car smoother to drive.
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Old 01-11-2007, 08:53 PM   #23081
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good point adrian.have you tried the crc pro cuts yet dude?they seem to have a different feel then the wraps.the wraps seem to be a little more mellow when compared to the procuts of the same compund.it almost seems that the traction additive works differently on the wraps or is absorbed differently with the stiffer foam core as opposed to a larger rim.it may be me or maybe i need to lay off the crack pipe but they felt definately different to me.
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Old 01-11-2007, 10:43 PM   #23082
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I ordered some Double Pinks from BSR today on big rims for Minnreg. I'll get you a set to try out so you can see how they compare.
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Old 01-12-2007, 12:48 AM   #23083
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A couple guys at my club have recently tried the CRC Pro Cuts. Most of them had the tires chunk severely out of the middle.
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Old 01-12-2007, 01:20 AM   #23084
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[QUOTE=protc3]the new car does have tweak screws.the tweak screws are used if you want to increase side spring tension.without them it is solid mounted fixed tweak setting.very similar to the way yokomo did the t plate at the worlds.i will have pics up this week of the final production car if all goes well.

its almost the end of the week now, so lets see some pics shall we, jason?
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Old 01-12-2007, 02:44 AM   #23085
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Hi Brian
Sorry to hear about the melt down! Makes me even more glad I ordered mine early though. Have you got any advice about set up when using the flex plate, do you change the amount of front additive you use etc....
I shall be running a fairly normal set up, L4 with CRC damper tubes, thin T piece, Jack the gripper (or CS grip) additive on GRP purples and Greys in 19t.
The first time I shall be trying it is at the next round of the U.K nationals.
Many thanks
Mark
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