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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 10-25-2002, 12:01 PM   #1711
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Hello,

We are leaning on the Trinity Spachett Edition but we have one more question. We saw that it's 4 cell chassis. We have been informed that the races will be 6 cell! Is there a 6cell chassis available? Is it like the 4 cell (with purple color)?



Thank you

Nick
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Old 10-25-2002, 12:16 PM   #1712
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The older Trinity Spachett Edition is a 6cell chassis and yes it has purple metal flake graphite.
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Old 10-25-2002, 12:59 PM   #1713
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Default 1/12 scale Asphalt

www.seidkracing.com 160X70 WOW HUH! I know it's big But it is a lot of fun. I to love 1/12 scale. ( carpet is my choice) I am going to the Big Novak race in Jan. I cannot wait. I have an Older Calandra Ver 2 Very solid handling ride. Consistant A main competitor. Eric.B SEIDK Racing K.C.Mo.
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Old 10-25-2002, 02:11 PM   #1714
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nnick, if you are going to race 6-cell I think that the best car to get would be the 12L3 or the CRC 6 pack. If you want to run a Trinity in a 6 cell class you would have to get the older car. If you do end up getting the older Trinity I would recomend that you upgrade to the newer rear pod. Otherwise I like the Associated car. Corally does make a 6 cell car too.
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Old 10-25-2002, 09:29 PM   #1715
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Hello Hello....any comments on the new Granite rear tires????????????

Good luck to all going to Cleveland.
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Old 10-28-2002, 01:58 AM   #1716
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Hey guys, what would be your choice for a new stock motor. The local indoor track is about to open soon and I am shopping for a new motor. The tracks layout is appx 40x70ft. Thanks
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Old 10-28-2002, 08:02 AM   #1717
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Battery question

What batteries do you guys run?? I cycled one of my 2 packs last night on the T35, but pack charges to 560 ma Bummened that I need new pack now. I have one HV pack that I have used since April, gives 355 sec @30 and 468@20. Do you guys use HV or UMH cells?? New to 1/12.

Hydromatic99: I am new to this, but I use P2K2, GM3 and Hellfire with narrowed brush.
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Old 10-28-2002, 08:39 AM   #1718
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I have had really good results with my green machine
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Old 10-28-2002, 09:05 AM   #1719
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Hey guys, I have read through about 80% of this thread, and have learned a lot so far. I am just getting started in 1/12th scale. I have ran just about everything else r/c, but this is all new to me.
Here is my ride , got it for $50 with the steering servo (Hitec 225BB) and 3 3000 Reedy matched packs. (I know they are old, I will be getting some new ones for racing. Those will be practice packs. I am told the car is a L2, and I plan on converting it mostly to a L3 since not much is different. I would like to use the 3 screw hubs I think. Those wheels and tires are trashed, so I need to buy new anyways. Just need to get used to it and learn all the little tips and tricks to setting up the car right. I look forward to learning.
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Old 10-28-2002, 02:14 PM   #1720
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If anyone is interested, I'm selling a 12L3 (with about 20-30 runs on it, raced 4 times), with a Reedy 12x3MW (cut only 2 times) and a JR mini race servo (3750 I think- it's the fast, non digital one) for $135 O.B.O.

If anyone is interested, email me @ x_tian69@hotmail.com
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Old 10-28-2002, 04:57 PM   #1721
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actionrc, that car you have looks like a 12LC, for you to get the 3 bolt hubs and wheels you need to get the newer axel too i think, if you are going to be racing on carpet i wouldn't recomend getting the L3 chassis, i would use the one that you have. If you are going to race on asphault you might want to get the newer chassis. Good looking car, i like the old school white plastic.
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Old 10-28-2002, 06:02 PM   #1722
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Thanks for the tips. I was planning on getting the full IRS axle and hub kit for it. I do plan on racing on carpet, and have heard from others as well that the L3 isn't the best carpet chassis. Yeah, I think I am going to dye the white parts blue lol.
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Old 10-29-2002, 05:25 PM   #1723
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Tigger.....guess what....Im bringn out the Trinity car this weekend are you racing or practicing any where this weekend? I should be at Venture saturday and at Trackside sunday LMK.

Does anyone use the GM V12wc in there car with a Rec. pack? I know that it does not require one but was wondering if anyone has used one with it before.
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Old 10-29-2002, 10:32 PM   #1724
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a guy I race with uses a rx pack with his v12, he uses 5 tiny 50mah cells
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Old 10-29-2002, 11:36 PM   #1725
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Kevin K, I have a GM V12 wc and I ran 5 50mah-cells receiver pack before. It worked great, I ran it because I was running KO digital servo. But with the new GP3300, I won't be needing the receiver pack anymore.
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