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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 04-14-2007, 01:26 PM   #24931
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Quote:
Originally Posted by P2
Here is their last meeting...David Galdo is on the top right, CarlosG is on the bottom right. Look who's not too happy.

Is there a Girl in the pic
wow what about that guy in the lower far left ( the 80's called they want their mullet back)
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Old 04-14-2007, 01:27 PM   #24932
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Quote:
Originally Posted by wallyedmonds
yes i looked this up
theres not to much for 4 cell
looks like the lrp stuff is the way to go but
x11 motor 5.5t with sphere 2007 esc
is the way to make the nitro guys go
I really like the looks and specs of the Tekin R1 Pro - now if they will come out with it already!!!!
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Old 04-14-2007, 02:29 PM   #24933
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Quote:
Originally Posted by protc3
let me know how it goes.if the rain stays away i will be running tommorow.i really want to get out running my 1/12th.i wish i could make it to the express race.the track looks real fast.looks like it could take alot of gear.
Jason what tires do you normally run outdoors? We have been running CRC procuts purple front and grey rears. Sometimes I will run d/pink rears. This is for stock on our indoor asphalt. We have alot of traction. I was thinking CRC or Jaco 2stage for the eXpress race.
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Old 04-14-2007, 02:41 PM   #24934
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Quote:
Originally Posted by SRW141
Jason what tires do you normally run outdoors? We have been running CRC procuts purple front and grey rears. Sometimes I will run d/pink rears. This is for stock on our indoor asphalt. We have alot of traction. I was thinking CRC or Jaco 2stage for the eXpress race.
i run 2x pink front and rear in 19 turn and mod.i just ran the BSR tires on high roller wheels and they worked great.i space the rear width to 172mm and the front to 165mm and the car was on rails.i dont like the feel of purple fronts outside and grey rears will wear down way too quick outside.give it a try and let me know what you think
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Old 04-14-2007, 02:47 PM   #24935
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Quote:
Originally Posted by AChupp2
I had the same type of thing happen with my 767's as well. I got them at the beginning of the season and they were terrible (barely pulled 5 amps). I decided to try them at the end of the season just to see what they would do. They ended up pulling 9-10 amps at that point. Not all of them that sat around were that good though. Maybe there is something to this

so im not crazy its the stangest thing but hell,if they work they work.hell,im gonna get some more brushes for next years racing.brushes are like fine wine i guess.
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Old 04-14-2007, 04:32 PM   #24936
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Quote:
Originally Posted by tpczx6
also note the size of the trophy Carlos and Diane our holding I do belive Diane's is bigger I think the Carlos needs to work on 4th thru 8th place before talking smack about beatting on 3rd place.
Are you trying to say size does matter
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Old 04-14-2007, 05:17 PM   #24937
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Quote:
Originally Posted by AChupp2
I had the same type of thing happen with my 767's as well. I got them at the beginning of the season and they were terrible (barely pulled 5 amps). I decided to try them at the end of the season just to see what they would do. They ended up pulling 9-10 amps at that point. Not all of them that sat around were that good though. Maybe there is something to this

brushes are not like wine
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Old 04-14-2007, 05:22 PM   #24938
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Quote:
Originally Posted by duckman996
I really like the looks and specs of the Tekin R1 Pro - now if they will come out with it already!!!!
ya but they wont come out with it for some time yet
and im trying to get something now for 1/12.
and im looking at the mamba for the new kyosho 2wd buggy or the 4wd
oh am i thinking out loud again.
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Old 04-14-2007, 06:53 PM   #24939
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Default Gear Ratio 19T Checkpoint

Is a final roll of 2.43 over geared for a 88 Spur 36 Pinion??


Anybody??
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Old 04-14-2007, 07:13 PM   #24940
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Quote:
Originally Posted by wallyedmonds
brushes are not like wine
actually,i think they may be.check my post on the last page.it was really strange and the whole batch i have are like this.
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Old 04-14-2007, 07:14 PM   #24941
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Quote:
Originally Posted by MACH55
Is a final roll of 2.43 over geared for a 88 Spur 36 Pinion??


Anybody??

i havent tried the checkpoint in my 1/12th yet but it sounds just a tad high.i would start at a 88/35.if you feel it can use more gear,throw it on.
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Old 04-14-2007, 09:14 PM   #24942
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Default Help with my l4

I got a brand new l4 for 80 dollars the car has never been run. i also am putting a co27pro in it does anyone know what gearing i can run. if anyone can tell me what i can do to make the car better please let me know asap thanks everyone
vic


the setup as of now
hitec 255 mg servo
novack tc2 speed controler
spectrum radio
co27 motor
100 tooth spur gear
4200 cells
31 tooth pinion
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Old 04-14-2007, 09:29 PM   #24943
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Hey RLMW VQ,

Your Pretty Close with the gearing 31/32/33 and 34 100 should put you in th ballpark.
Set your motor up like this
F-Brush
Green Spring on Pos + Green Spring on Negative
That should dot it for the motor.
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Old 04-14-2007, 10:38 PM   #24944
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P2 said the motor was fast, boy was it. It even hadsome torque to it. I was very impressed with the motor. I ended being a lap down from P2 in the main. I expected comm wear to be alittle more than it was. I could of gone up one more tooth from the 31t pinion that I ran all day. The KD was ballistic for a 19 turn motor that I ever seen run. I would like to thank you guys for the information on setting up the motor.
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Old 04-14-2007, 10:42 PM   #24945
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Thanks for the report Carlos, sounds like I need to try those xxx brushes again
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