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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, 10:47 PM   #24946
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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.
Hey, this rivalary is between David and I. A person is allowed to talk smack to his rival, that is what makes things fun. I know that I have no chance in HELL to be in the same league of a driver as you (Tim) and P2. Plus this rival between me and David has been going on since the US Pancar Champs of 2005.
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Old 04-14-2007, 10:55 PM   #24947
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Originally Posted by protc3
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.
i did read it and i did have this kinda happen too but its not the brushes.
it happend to 4499's too.
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Old 04-14-2007, 11:03 PM   #24948
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Quote:
Originally Posted by CarlosG.
Hey, this rivalary is between David and I. A person is allowed to talk smack to his rival, that is what makes things fun. I know that I have no chance in HELL to be in the same league of a driver as you (Tim) and P2. Plus this rival between me and David has been going on since the US Pancar Champs of 2005.
Carlos,

It's good to have a rival...it makes for more interesting racing. Plus it's nice to have a little bragging rights Now you know how Tim and I feel each time we race each other
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Old 04-15-2007, 05:01 AM   #24949
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Originally Posted by wallyedmonds
i did read it and i did have this kinda happen too but its not the brushes.
it happend to 4499's too.
it has to be something changing with the brushes if they sucked before and are good 1/2 a year later.all the same conditions and different results.the only thing different were the aged brushes.there has to be something effecting the brushes over time.sun spots,location of the moon and sun while the earth is a slight angle,i dont know but its something.
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Old 04-15-2007, 05:54 AM   #24950
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Quote:
Originally Posted by protc3
it has to be something changing with the brushes if they sucked before and are good 1/2 a year later.all the same conditions and different results.the only thing different were the aged brushes.there has to be something effecting the brushes over time.sun spots,location of the moon and sun while the earth is a slight angle,i dont know but its something.
Same thing with the F brushes.....I have some from Oct last year that are screamers...
Glad I didn't sell off all my brushed gear...LOL

One quick question since i am racing 12th today...
is 43.00-44.00mm roll out a good starting point for a CO27?
I thought that is what I ran for 19T but I can not remember...Dang I am getting old....LOL
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Old 04-15-2007, 06:06 AM   #24951
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last time i ran stock i ran stock with a CO27 i geared it at a 47mm roll out.

looks like im gonna be making a brush cellar in the garage now. im stoked to try some old xxx brushes now.i think i got some ancient 4499's also.
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Old 04-15-2007, 06:11 AM   #24952
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the damn rain fried my race day today.i cant get a break
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Old 04-15-2007, 06:19 AM   #24953
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Originally Posted by protc3
the damn rain fried my race day today.i cant get a break
Well here is something to brighten your day since you race mostly on asphalt..
http://www.rctech.net/forum/attachme...hmentid=222128
supposedly its from Kyosho.
Interesting to say the least...
OK I will try the 47mm rollout...I think I got my rollour confused with my 19T rollout. Its only two teeth anyhow..LOL
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Old 04-15-2007, 07:05 AM   #24954
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i dont run stock very often and i started at 44mm.the thing just seemed to keep wanting more gear

that nitro 1/12th is pretty insane.i wonder if it will go into production?
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Old 04-15-2007, 07:23 AM   #24955
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Originally Posted by protc3
it has to be something changing with the brushes...i dont know but its something.
I think OD had it right--magic box.
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Old 04-15-2007, 07:40 AM   #24956
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Quote:
Originally Posted by CarlosG.
Hey, this rivalary is between David and I. A person is allowed to talk smack to his rival, that is what makes things fun. I know that I have no chance in HELL to be in the same league of a driver as you (Tim) and P2. Plus this rival between me and David has been going on since the US Pancar Champs of 2005.
I know it betwen you and David, but we want in on some of the fun!!!!

and yes you do have a chance in H#$% to run with Paul and me the more you run with and take our advice you will become faster but also remember to mutch info sometimes will hurt you also

now lets get david on here to talk smack

P2 I will get you next time (smack)new motor and Batts in the works as I type
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Old 04-15-2007, 08:16 AM   #24957
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Default crc gen x front end

can someone give me link to thread about the new front end. pros, cons and mods needed to run that front end.
thanks
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Old 04-15-2007, 08:33 AM   #24958
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Originally Posted by Scottrik
I think OD had it right--magic box.
yup,its gonna be my mojo brush box.water them twice a week with a mixture of distilled water and viagra
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Old 04-15-2007, 08:35 AM   #24959
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hey tim and P2,a buddy of mine lives in texas in the Austin area.i just spoke to him last night and he is looking to get back into R/C and running 1/12th.are there any tracks around that area that i can refer to him?
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Old 04-15-2007, 08:42 AM   #24960
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that nitro 1/12th is pretty insane.i wonder if it will go into production?
hmm 1/12th nitro?? maybe thats something that you and Adrian can work on!! DB12RR-Nitro
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