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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 10-01-2011, 12:58 AM   #36556
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Either Rick or Lonny. Lonny is a 1/12 scale and pan car fanatic, Rick will also race offroad if the mood strikes him.
I think it was lonnie yea the guy I remember really likes the 12th scene

Quote:
Originally Posted by chris moore View Post
That would be Lonnie
Have you raced with him long? We're you around when they had carpet in '04 in tuscon? If you see him say hi from Kelly English he should remember me I raced about 20 times at that indoor track. I had a yokomo with silver chassis

Quote:
Originally Posted by DesertRat View Post
Having been back in 1/12 scale for a while, I have a list of questions for other like racers:

1: Does it take everybody two hours to cut out a body to satisfaction?

I am kinda cheesy with bodies just red and cut it as fast as possible without screwing it up...lol

2: Do you keep all of your junk in some other room but put your car on your desk but not to work on it, just stare at it and flex the suspension every few minutes?

Car on desk but also everything else is also in room and yes I flex once an hour

3: Do you get way to happy for breaking your old single lap record by a few hundredths of a second?

Yes I collect time sheets and review them while I'm flexing my suspension hourly

4: Why is there always somebody with a smoother diff no matter what you do?

Because Michael O'Donnell is a diff master hence do what he does and you'll have the smoothest diff...lol

5: Why do the apexes of the corners seem to move between rounds?

TC...lol

And 6: Why is it so damn hard to convince anybody who doesn't already do it that racing toy cars is cool? Much cooler than say... video games, golf, or whatever normal people do for fun?

Every minute you are trying to convince someone of that you could be flexing your suspension

Last edited by Infinite 12th; 10-01-2011 at 01:09 AM.
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Old 10-01-2011, 05:06 AM   #36557
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so I am on the hunt for jaco pink rear tires and everywhere I look its sold out. Does anyone know where I can find these online and in stock?
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Old 10-01-2011, 11:57 AM   #36558
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Originally Posted by goots View Post
so I am on the hunt for jaco pink rear tires and everywhere I look its sold out. Does anyone know where I can find these online and in stock?
It would seem that this is a lousy time to be shopping for any indoor carpet foams because people are gobbling up stock in preparation for iiC in Vegas. If you are going there, then maybe someone there will have extras to sell you. If not, just wait until after the race is over as there will be many in the FS forum from those who want to unload their leftover stock to recoup their cash.
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Old 10-01-2011, 02:24 PM   #36559
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so I am on the hunt for jaco pink rear tires and everywhere I look its sold out. Does anyone know where I can find these online and in stock?
It's the beginning of the indoor season, the last few years I have noticed that stock levels are low after the initial hit.

After iic there will be more available.
Check ampdraw.com
CRC, BSR, and Lefthander have tires, or donuts.

For whatever reason Jaco/Parma seem to underestimate the popularity of 12th scale year after year ?

TRC have come in with a lot, but even those are hard to find lately.
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Old 10-01-2011, 04:20 PM   #36560
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Default 1s lipo balancing

This goes to show how much of a newb I am about 1s lipo racing.

Noticed that there isn't any balance port on my lipo. Does that mean that 1s lipos don't need to be balanced?

This may be a stupid question but I thought I would ask.
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Old 10-01-2011, 04:24 PM   #36561
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Originally Posted by YR4Dude View Post
This goes to show how much of a newb I am about 1s lipo racing.

Noticed that there isn't any balance port on my lipo. Does that mean that 1s lipos don't need to be balanced?

This may be a stupid question but I thought I would ask.
that is correct, balance not needed.
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Old 10-01-2011, 04:28 PM   #36562
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Quote:
Originally Posted by DesertRat View Post
Having been back in 1/12 scale for a while, I have a list of questions for other like racers:

1: Does it take everybody two hours to cut out a body to satisfaction?

2: Do you keep all of your junk in some other room but put your car on your desk but not to work on it, just stare at it and flex the suspension every few minutes?

3: Do you get way to happy for breaking your old single lap record by a few hundredths of a second?

4: Why is there always somebody with a smoother diff no matter what you do?

5: Why do the apexes of the corners seem to move between rounds?

And 6: Why is it so damn hard to convince anybody who doesn't already do it that racing toy cars is cool? Much cooler than say... video games, golf, or whatever normal people do for fun?
And I thought I was the only one too!!

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Old 10-01-2011, 06:11 PM   #36563
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Originally Posted by YR4Dude View Post
This goes to show how much of a newb I am about 1s lipo racing.

Noticed that there isn't any balance port on my lipo. Does that mean that 1s lipos don't need to be balanced?

This may be a stupid question but I thought I would ask.
Si... no balance needed. It is a single cell, remember... nothing to balance it to.
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Old 10-01-2011, 07:53 PM   #36564
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Originally Posted by JamesL_71 View Post
Si... no balance needed. It is a single cell, remember... nothing to balance it to.
Actually, there are at least 2 cells in there but they are in parallel and thus self balance.
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Old 10-01-2011, 08:01 PM   #36565
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Hey Kelly, I remember. Chris and I have been racing each other since before ESCs I think. Of course being die hard, I used a resistor long after almost everyone else had switched.
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Old 10-01-2011, 08:37 PM   #36566
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Hey Kelly, I remember. Chris and I have been racing each other since before ESCs I think. Of course being die hard, I used a resistor long after almost everyone else had switched.
Hi Lonny nice to see you. I too used the resister but then bought my first speed control by Tekin (Red sticker one not the gold sticker one) That is great you have carpet track there again. Is it in same RC store in tuscon? I have never had such a dialed car as I did there. Just got back from Norcal Hobbies in Union city and virtually 12th is dead there. There was this one guy today (RC125.1) that had some good skills and his car worked pretty good. Another nice guy named Josh and another guy (CRC new car) had 12th interest but since no one is running there wasn't a heat. Besides that we have Michael O'Donnell, Crashby and maybe Tim Copp I dunno so it doesn't seem 12th will be happening any time soon at Norcal

Also I think they run 13.5 and I can't really see myself not running mod ...lol Plus there seems to be need for two speedo's depending on what class is run .5 classes or mod

As sad as it sounds I guess I'll get a TC6 since the guys near my skills are running TC mod

I'll be getting the 4PL radio, probably run the Team Power stuff as this guy named Larry there is very good with motors

Otherwise probably a speed passion speedo

Things have really changed since 8 years ago. Lipo, Brushless, new speedo's
Also it seems most 12th have the side spring

Desert Rat seems like a cool guy to have racing with you and he clearly has the 12th scale DNA gene mutation...lol

How has your racing been? What car are you running? Let me know I wish you best of luck and tight lines

Take care

Kel
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Old 10-01-2011, 09:49 PM   #36567
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I alternate between a Serpent S120L and a BMI Copperhead 12. Really like the Serpent, very high quality and went well right out of the box, but the BMI is coming along. We run 13.5 boosted which is plenty fast for this old Fart. Have a Speed Passion V2.1 for 1S which works quite well. You might consider the GT2.0, it has the heat sink for TC mod. Most people are using LRP or Tekin. Keep after the 1/12TH, it almost died here, but we kept after it and are enjoying a nice comeback.
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Old 10-01-2011, 10:01 PM   #36568
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I alternate between a Serpent S120L and a BMI Copperhead 12. Really like the Serpent, very high quality and went well right out of the box, but the BMI is coming along. We run 13.5 boosted which is plenty fast for this old Fart. Have a Speed Passion V2.1 for 1S which works quite well. You might consider the GT2.0, it has the heat sink for TC mod. Most people are using LRP or Tekin. Keep after the 1/12TH, it almost died here, but we kept after it and are enjoying a nice comeback.
You gotta have some pics of that serpent and BMI correct ...lol

I will keep after the 12th it's my passion

I think this is what most fast TC mod guys use at Norcal

Not sure it will work for 17.5 if no mod guys are there but mod actually seems to be popular class

Look forward to seeing you at a race

Later
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Old 10-01-2011, 10:57 PM   #36569
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That new Serpent 120LT looks pretty sweet.


http://serpent.com/product/410004/description/
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Old 10-01-2011, 11:20 PM   #36570
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That new Serpent 120LT looks pretty sweet.


http://serpent.com/product/410004/description/
I see everything cool that you post or update ...lol

If I am honest i never really felt the tubes 12th cars

Remember the bolink or parma car that had one tube

Not this one I think maybe one of these and I used the body to the right

Those we're the days

Right now I would get the RC125.1 if 12th was a viable class here

I love Norcal it is such a cool track

Kevin is doing great

Are you at the IIC

Did you ever even play with the "shock" serpent car?

I liked it's look better although serpent made the decision to do tubes

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