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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 01-24-2007, 09:24 PM   #23326
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Quote:
Originally Posted by Scottrik
Is that "pretty light" or "pretty good" turnout?

I'm interested all right. Just not AS interested to only do one class. Guess who's the one who told Bob about your event...

Scottrik
I meant pretty good. These guys are anything but pretty.

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Old 01-24-2007, 09:35 PM   #23327
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Quote:
Originally Posted by DPowell
I meant pretty good. These guys are anything but pretty.

D.P.
I like this D.P guy. Our kind of humor.
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looking for....vintage 1/10-1/12 pan, need Schumacher 1/12th cars and parts.
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Old 01-24-2007, 09:42 PM   #23328
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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
<--- 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.
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Old 01-24-2007, 09:47 PM   #23329
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I just noticed. The Darkside and PRC guys are Colorado guys. I bet they duke it out in the parking lot after a race... lol...

Not to unlike the Hobbytown people having us at their track. Can be awkward for some.
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Old 01-24-2007, 09:49 PM   #23330
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Yea... We might attend if there was a stock 1/12 class.

djb
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Old 01-24-2007, 10:02 PM   #23331
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Scottrik - Try this entry form. You can click in the areas that you need to fill out and then print it. I do this for all of the entry forms so they can't question my hand writing.

djb
Attached Files
File Type: pdf 4th Annual HobbyTown Carpet Classic Form.pdf (73.8 KB, 215 views)
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Old 01-24-2007, 10:35 PM   #23332
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Quote:
Originally Posted by Bob-Stormer
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.
Yeah, but I'm not racing the series and am thinking to try Regina in Feb. Can only take SO much Cannuck "hospitality" in a given year...

Plus a chance to meet Mr. PRC AND Mr. Darkside at one race. I've owned BOTH their chassis and didn't realize they were so close. In fact, JP has been running the PRC off-and-on as he tries to sort his other cars. Keeps coming back to the PRC...you'd think he'd figure out it was the right choice for him sooner or later.

Scottrik
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Old 01-24-2007, 10:40 PM   #23333
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Colorado guys--I'd give it a REAL shot to make your event if you added 1/12 stock AND if you offer XXXL T-shirts (I likes a bit o' room in my T's). I'll even throw-down for a second T. Getting there Thur or early Fri is definitely no prob for me...not wild about getting a late start home Sun, but that's do-able (same basic drive as Minot for us...but warmer ). I've got exams Tue and Wed the following week, but I can handle it. I'd also electioneer like hell to get a couple of our posse to join me. I know Shawn wants to do a racin' road trip, Rick's usually up for a trip as is JP. Ya never know...

Scottrik
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Old 01-24-2007, 11:52 PM   #23334
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Wish i had a money tree growin in my living room to come join you guys!
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Old 01-25-2007, 12:11 AM   #23335
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doe sanyone run a futaba 9650 in a 12l4?? if so did you have to cut off the side tabs in order for the servo to munt up to the servo brackets properly??
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Old 01-25-2007, 03:41 AM   #23336
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I put a futaba of the analog version (same case) in a 12L3 that I have a friend driving and yes I had to cut off the side tabs to properly mount it using the front tabs.
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Old 01-25-2007, 03:46 AM   #23337
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Hopefully someone can help me with this..... I own a 3.2R CRC.. What is the job for Dampers, side springs, and center spring.
With lighter to heavier lube in damper, this does what effect?
With lighter to heavier side springs , this does what effect?
Center spirng and Oil weight , what happen with light to heavy?

Please let me know what the duties are for these and what would you recommend to start out with. Thanks for the help and time.
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Old 01-25-2007, 05:14 AM   #23338
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Ray Huang has a tip sheet that'll help you. I just can't remember where I found it.
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Old 01-25-2007, 06:00 AM   #23339
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Quote:
Originally Posted by Scottrik
What are the odds of adding another 1/12 class to the event (stock or mod)? Long drive to run one class...

Scottrik

Eric--ran the Darkside for the first time last weekend. Had a couple new-car problems, but it opened a few eyes!! WOW. Pretty much un-sorted yet and it set the fastest time(s) of the race in 19-T. Wait'll it gets dialed in...
Glad to hear the car worked well for you. I think that the 1/12 stock class might be able to become reality. I'll work on that. Look forward to all of you guys making the race.

-Eric
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Old 01-25-2007, 06:01 AM   #23340
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Originally Posted by InspGadgt
Wish i had a money tree growin in my living room to come join you guys!
That'd be one heck of a trek.

-E
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