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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 05-18-2002, 10:48 AM   #946
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Newracer- the clamping hub is my favorite now. It may not be as totaly true in motion as the Assoc. screw on but it is easier and more consistent to set side play and I think stronger. The Assoc. screw on hubs can go out of round and I have seen it happen to others as well has myself. They are also very difficult to set the side play and can back off so I normally had to sand it down and do final adjustments with very thin washers, over time the hub would wear down a little more and I would have to readjust with washers. The setscrew hub I would stay away from because of reasons mentioned by others.
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Old 05-18-2002, 12:32 PM   #947
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thanks for the replys, I am going to order a clamp hub this week. After messing with the associated one I have, it does seem like the clamping would be the easiest to set.
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Old 05-19-2002, 02:10 PM   #948
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Well....picked up my "Knife".......used, but only has four runs on it.....interesting to see if it is faster than my RC12LW?????

These Parma Speed 8 bodies dont give you much room for electronics, the sides swoop down a little too far
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Old 05-20-2002, 06:03 AM   #949
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Slayer - That body fits the REV3 perfectly. But then the body was layed out with three different cut lines. One of those should work well with your car.
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Old 05-20-2002, 12:48 PM   #950
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Spot on DaveL, I use the middle trim line on mine with a little more trimmed away in the front for clearance.

This body is awesome but it will be interesting to see what the new Andy's body will be like.
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Old 05-20-2002, 02:10 PM   #951
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Default Rip-Off!!!

The Trinity body is a carbon copy of the Parma body with a splitter on the rear wing. The Parma works so well that Trinity really cannot improve on it, per se. Especially in such a short period of time as they developed theres. I would guess there drivers probably said "The Parma is the only body to use!!" so to have a competitive 12th scale body for the team, they copied the Speed 8. A fairly low class move on Andys or Trinitys part. I dont know who made that decision. I mean you never saw two identical P35 NIssans from mutiple manufacturers did you?
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Old 05-20-2002, 02:19 PM   #952
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Unhappy Left side hubs revisited

Here is my 0.02 on the left side hubs.

I have used all three style left hubs and the clamping is by far the best with the least trade-offs. The IRS left hub is super light and is reliable. Never loosens and like others have said; Set it close or far away and forget about it. The stock threaded hubs are heavy and are very difficult to set the back-lash or gap on and even harder to remove. All that extra weight with the plastic nut, threaded rod on axle, etc. NAH!!! The Niftech hub I had with the set screw was set and forget, but over time it deformed the axle over a large portion of the axles length and was actually binding the axle in the bearing!!! I had to sand the axle till it was round again. Once I switched to the IRS one, my axle spun free again, race weekend after race weekend. So now I have a NIftech axle with IRS clamping hub in a Speedmerchant car. Its a Basta-d car!!!!
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Old 05-20-2002, 06:27 PM   #953
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Picked up a new Parma Speed 8 for my Knife....i'll check the extra lines and see if that helps.....now i gotta learn how to set up a Knife.....may turn my RC12LW into an oval car......or my Asphault car....dont wanna put any scratches on the bottom of my new ride.....
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Old 05-20-2002, 06:59 PM   #954
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dave s, are you going racing this saturday? I want to try the new stuff out that I did to my trinity/associated. Drop me an email avink1@aol.com let me know when you want to race the little cars.

Last edited by Avink1; 05-22-2002 at 09:53 PM.
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Old 05-21-2002, 05:33 PM   #955
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Avink1, you gots mail.
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Old 05-22-2002, 06:38 PM   #956
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sup ya'll........ttt
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Old 05-22-2002, 10:06 PM   #957
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Dave S, I can't race 12th scale this weekend. I'm trying to figure out the new dirt, and my buddy got a new truck and needs help with that.
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Old 05-23-2002, 05:38 PM   #958
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Avink1,


Cool. Good luck on the dirt! I'll just have to whip out the 'ol taxi and see if I can make up the points difference from last week.

See ya Saturday!
Dave
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Old 05-27-2002, 08:30 AM   #959
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Man, i go to the Indy 500....and ya'll let this fall off the board(i'm set up on 2 days post).....finishing under the yellow SUCKS!!!!!!....beautiful day....we got there saturday morning set up a tent by the speedway, and watched all the crazy peeps drinking at 6:30 am.......geez..........Redon and Lazier ended up right in front of us........all the rumors of people smoking cannibus at the speedway is not true ..........didnt get to race this week again....dang, i'm gonna be rusty
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Old 05-27-2002, 02:22 PM   #960
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picked up a clamping hub, you guys are right!! very easy to set, very light, can't wait to get my car running!!!
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