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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 01-25-2007, 06:41 AM   #23341
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Quote:
Originally Posted by InspGadgt
Wish i had a money tree growin in my living room to come join you guys!
I think one of the TC companies are releasing one of those soon...I've heard rumor it will be ready in two weeks
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Old 01-25-2007, 08:47 AM   #23342
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Quote:
Originally Posted by dr_hfuhuhurr
I think one of the TC companies are releasing one of those soon...I've heard rumor it will be ready in two weeks
Yes, but the ENTIRE production capacity of said tree will be consumed by the regular "updates" to chassis...
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Old 01-25-2007, 10:06 AM   #23343
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Quote:
Originally Posted by Bob-Stormer
<--- goes to look at the form he printed out, but didn't actually look at.

I'll be danged... I need a white pen like Scottrik.

1/12 stock would be a nice addition if the track felt it was a good idea.

Scottrik, it's the same weekend as Calgary, the 4th leg of the WCIC series.

Calgary is about 1/2 the distance for us. You guys are right in the middle, almost exactly.
1/12 stock will be offered at the race. The track director expects to have enough for at least 3 heats. The class is being run every Sunday at the track currently and has a strong following. As far as sign-ups go, just consider it as a write-in class. Hope to see you all!

-E
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Old 01-25-2007, 11:45 AM   #23344
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Quote:
Originally Posted by THE DARKSIDE
That'd be one heck of a trek.

-E
Yeah it would but it wouldn't be the first time. Some friends of mine and I took a trek out to the RC Thunderdrome the last year it was called by that name and had a blast. And my travels for work have allowed me to race a couple times in SoCal and Seattle areas. But lately my dept. travel budget has been restricted.
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Old 01-25-2007, 12:07 PM   #23345
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Out of towners traveling to Colorado for the HTW Carpet Classic in March, I may have space in my house if your looking for a place to crash. I live about 10 minutes away from the track. The offer also extends to the FC folks also. I have room for 2 "clean" racers.

I don't get on this forum much, so email me at robert_chu at yahoo dot com or post on the "whatup...4..in CO" Trinity Tech Talk thread. Preference will be given to racers with 36, 24, 36 measurements AND XY chromosomes.

Turnout for 12th scale classes at HTW has been amazing this season. Hope you guys can make it.
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Old 01-25-2007, 12:11 PM   #23346
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InspGadgt are you a Hawaii F1 RC racer? How is the racing scene there?
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Old 01-25-2007, 12:41 PM   #23347
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Quote:
Originally Posted by DPowell
Bob,
Here is a flyer link for you. Bring the Montana crew!!

http://hometown.aol.com/hatrick1966/...%20Classic.pdf
PRC / Darkside - Thanks for the note on the flyer - see the attached for the update, and yes there will be a 1/12 stock. If enough racers 4+ we can also have a modified class as well.
Attached Files
File Type: pdf Carpet Classic001.pdf (191.7 KB, 115 views)
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Old 01-25-2007, 12:51 PM   #23348
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Quote:
Originally Posted by Scottrik
Uh oh--just printed out the entry form. Is there a version that isn't all on a dark background. I don't have a pen with white ink so nothing I fill in on this one will show up The form looks nice enough (I guess) but it isn't overly practical.

Scottrik
Posted above as a PDF file that you can print from here.

Hope you can come play
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Old 01-25-2007, 12:56 PM   #23349
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Hey some of us from Colorado are looking to get away from snow every weekend and are heading off to Omaha for thier race February 23rd, 24th and 25th. Not all the fast guys just good racers who like to have fun!!!

Anyone else going??
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Old 01-25-2007, 01:01 PM   #23350
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I need a servo saver can you guy recommend one all the one I find are to big
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Old 01-25-2007, 01:24 PM   #23351
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Quote:
Originally Posted by brad996
I need a servo saver can you guy recommend one all the one I find are to big
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Old 01-25-2007, 01:26 PM   #23352
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I am running a small Hitec servo saver in my REV 4.5 , with the servo mounted flat and I did not have to do any grinding for clearance.
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Old 01-25-2007, 02:31 PM   #23353
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Quote:
Originally Posted by SocalRChu
InspGadgt are you a Hawaii F1 RC racer? How is the racing scene there?
That's me...I was the race organizer/director for the scale F1 race out here which was one of the longest continually running race series in the US. I lose count in my old age but I believe we were nearing 15 years of the series. Unfortunately 2005 was the final year for the F1 series as interest died out. But 2006 saw the return of 1/12th scale pan car racing at an indoor track on pearl harbor. Unfortunately due to difficulties in getting on base and other issues that track was closed down and turned into an indoor airsoft field. Pan cars are my favorite cars to build, drive, and race so I didn't want it to die out so I started organizing it again in the parking lot of one of the local hobby stores. This sunday is our 2nd race and it looks to be growing allready. So far we are running 1/12th 19T, 1/10TC tamiya stock, and Mini classes. This will be held on the 2nd and 4th sundays. Also on the 2nd and 4th sundays is off-road racing at Barber's Point. They run pretty much the normal off-road classes. And on the 1st and 3rd sundays there is a nitro TC race held out behind the airport.
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Old 01-25-2007, 04:30 PM   #23354
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Hats off to you InspGadgt. The work that great guys like you and Grenade do really help this sport to grow. I don't know how you guys do it. It takes a lot of time and dedication. Thanks guys!
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Old 01-25-2007, 04:38 PM   #23355
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quick question guys: i'm running a 12L3 indoor on carpet 92x48 and it's a 19 turn class. i've got a fantom-tuned dynasty (not the V2 version) and was wondering what other options i have out there for motors? the track doesn't allow quad magnet cans so the reedy motors are out. any ideas/suggestions? also, does 767's with red and green springs sound like a decent starting point for the dynasty? thanks!

adam
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