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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 03-21-2002, 11:57 PM   #766
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hey corey, no need to shout man. Sheesh I was just trying to offer my ideas.
IKE
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Old 03-22-2002, 03:12 AM   #767
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SHEESH!! THIS IS SHOUTING!!!!!!!!! I was just saying man, you must have read it the wrong way LOL. I appreciate you trying to help me out. BTW why aren't you at the the NATS?
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Old 03-22-2002, 02:02 PM   #768
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work I had my hotel all ready to go and darnold and I and a few friends of mine were sharing a big room at a hotel down there. I was all psyched up about it and then we got a new contract at work that I had to stay back for a set up and get rolling. It sucks but work has to come first.
IKE
P.S.THIS IS SHOUTING!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 03-22-2002, 05:18 PM   #769
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Default batteries

I was hoping someone could give me a little insight on batteries. At my track we run stock 4 cell 8 minute races on carpet. I have a P2K2 Pro and 20/75 gearing. I don't have any "good" batteries yet and need to purchase some. Do you think it would be necessary to pick up NiMH or will 2400's suffice? I have plenty of 2400's and they are a bit cheaper which is why I am asking. All the guys I have asked at the track use NiMH's but I have only gone there twice (ran my TC instead). Will 2400's last the 8 minutes on a tight carpet track with a P2K2 Pro and the gearing I mentioned? Any help would be greatly appreciated. THanks a lot,
Dennis
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Old 03-22-2002, 05:39 PM   #770
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Dennis,
You shouldnt have any issues with making time with the gearing that you speak of. In regards to what type of cells to purchase in the future, I would go with Panasonic SMH's(Stock Metal Hydrides) they are lighter than the 2400's and the new 3000HV's from Sanyo. They also seem to offer more punch which is a good thing. The SMH's also seem to get better over time where the 3000HV's get soft as you use them and the seem to settle at a much lower run time average than the SMH's. Most of the good battery companies sell SMH's and you can get 4-cell packs from World Class Batteries for a very good price. They are the same packs that trinity or reedy sells but you dont have to pay for the name on the packs. You can go to www.worldclassbats.com and see the prices there. If you decide to purchase some let Chuck(owner)now that Isaac sent you. Let me know how it turns out. Also, please dont think that you need to get these batteries if you are making run-time. If you are making time with your gearing than stick with what you have until you actually need new packs.
IKE
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Old 03-23-2002, 12:42 AM   #771
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Hey Guys, I just thought I would drop this info in for ya. Dave Arnold a good buddy of mine(mentor mostly) and OUR helpful hand when it comes to the little cars is in 15th place as of today in 12th mod. Just a few spots behind Cyrul!!!!!!!!

----- 1/12 4-CELL MODIFIED -----
using 2 qualifiers
q.pts name id pts-lap/time...
2 MIKE BLACKSTOCK 24 | 2- 40/8:02.52 | 0- 40/8:02.04
5 MIKE LUFASO 30 | 3- 40/8:03.96 | 2- 40/8:02.04
7 BARRY BAKER 32 | 4- 40/8:05.23 | 3- 40/8:02.18
9 MIKE DUMAS 28 | 5- 40/8:09.77 | 4- 40/8:06.81
11 ERIC DESROSIERS 196 | 6- 39/8:03.03 | 5- 40/8:12.41
15 CHRIS TOSSOLINI 214 | 7- 39/8:03.41 | 8- 39/8:01.02
15 BRIAN KINWALD 222 | 8- 39/8:07.99 | 7- 39/8:00.47
15 PAUL LEMIEUX 213 | 9- 39/8:35.51 | 6- 39/8:00.05
23 MICHAEL BRUCE 141 | 11- 37/8:01.99 | 12- 38/8:14.18
23 MIKE MCMAHON 215 | 13- 37/8:07.93 | 10- 39/8:08.96
23 JOSH CYRUL 209 | 0- 41/8:11.19 | 23- 33/6:34.20
27 FERNANDO 143 | 10- 38/8:08.29 | 17- 35/7:32.10
28 JASON MOBERLY 63 | 17- 35/8:05.11 | 11- 38/8:09.32
30 BRIAN BODINE 204 | 14- 36/8:05.10 | 16- 37/8:13.30
31 DAVID ARNOLD 88 | 18- 34/7:43.20 | 13- 38/8:17.64
35 CARY BENNETT 158 | 21- 31/6:25.61 | 14- 38/8:41.84
35 BILLY EASTON 26 | --- DNS --- | 9- 39/8:01.72
36 RODNEY KISS 120 | 16- 35/8:02.22 | 20- 35/8:05.17
36 DAVE VERA 145 | 12- 37/8:02.40 | 24- 32/7:15.73
37 DOMINIC FAVORITO 135 | 19- 34/8:01.54 | 18- 35/8:00.24
37 JIM BISHOP JR. 86 | 15- 35/8:01.27 | 22- 34/8:06.57
39 DARREN SHANK 147 | 24- 7/1:50.33 | 15- 37/8:13.22
41 KEVIN GOWENS 21 | 22- 31/7:25.08 | 19- 35/8:00.27
46 JEFF BLACKBURN 11 | 20- 32/8:04.12 | 26- 5/1:11.17
47 RAYMOND BENKOWSKI 149 | --- DNS --- | 21- 35/8:05.69
48 JEFF WITTMAN 133 | 23- 27/6:26.05 | 25- 32/7:39.26
'>' indicates the best round


way to go dave!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 03-23-2002, 02:43 AM   #772
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hi
i'm ordering an RC12L3 and wondering which tires would worn out first...is it the front or the rear as i would also like to stock some extra tires for it
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Old 03-23-2002, 02:50 AM   #773
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MX3,
are you racing on asphalt or carpet? The kit tires that come with the RC12L3 are "green" compound tires. They are the softest and wear the quickest out of all the tire compounds we use. If you are racing on carpet or asphalt I would recommend getting some "gray" rears and "magenta" or "purple" fronts. You can run them at full height in order to get the most wear out of them, or you can true them down with a tire truer to get more speed out of them but less life.
IKE
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Old 03-23-2002, 10:48 AM   #774
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Looks like Darnold had a bad run in the first heat...otherwise he'd have been close to, or in the top 10......
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Old 03-23-2002, 12:22 PM   #775
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Quote:
Originally posted by FoamDonuts
MX3,
are you racing on asphalt or carpet? The kit tires that come with the RC12L3 are "green" compound tires. They are the softest and wear the quickest out of all the tire compounds we use. If you are racing on carpet or asphalt I would recommend getting some "gray" rears and "magenta" or "purple" fronts. You can run them at full height in order to get the most wear out of them, or you can true them down with a tire truer to get more speed out of them but less life.
IKE
tyhanks for the reply........if i order the purple front gray rear which tires would wear out faster.......is it the rear or front.....i would want to order more tires for the car as i would have to mail order it ...cant find it locally.....running on aspalt
thanks
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Old 03-24-2002, 08:58 AM   #776
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Onroad is finally coming to my town. When I get the 12L3, are the green foams good enough for asphault, even with fast wear?
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Old 03-24-2002, 05:55 PM   #777
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If the car is setup correctly the tires should wear fairly evenly. In my "limited" 12th experience my fronts are wearing a teeny bit faster than my rears. I am pretty smooth on the thottle so that is why my rears dont wear as fast. If you have a heavy throttle foot you will wear rears faster. It all depends on the driver.
IKE
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Old 03-24-2002, 11:29 PM   #778
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I have run the greens on Asphault and Asphault(with grit impregnated surface)they do wear faster but they have very good grip.....fronts have worn faster for me.
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Old 03-25-2002, 08:50 AM   #779
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A little tech tip from people who want to run their tires down to the plastic: I carefully sanded the lower arms, making sure that I kept them level, and took about 3 mm out of them. now my front rims are level with the bottom of the chassis. If I want to run bigger tires I have to put more shims that I normally would under the arms, but so what? I can run my tires longer. This probably isn't anything new, it's just something I did. If you do this be very careful, and check the arm for levelity (is that a word?) every so often, other wise this will screw up you front end and this tech tip will turn into a wrech tip.

Darnold-sorry about the darn old comment, I was feeling witty that day. No harm ment

anyone got any old paragon tires they wanna get rid of? I recently started running them all around my car and they rule! I just can't find anymore since paragon disappeared off the face of the earth.

ThePetenis
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Old 03-25-2002, 05:59 PM   #780
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Petenis......levelity...per Webster........to be level....to have levelness.......thats what Webster said.
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