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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 03-20-2004, 07:31 PM   #7291
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Quote:
Tim, that is very kind of you. I actually have a handicap. It is called benigne essential tremor. I take a beta blocker to help. It reduces the impact of adrenaline on the nerve endings. The tremor I have is aggrevated by adrenaline when I want to do really well or something perfect, like script my name. So I am not nervous, just trying very hard.

I turned 56 years old last Feb. I figure I have about 4 more years to drive at this level. After that, I will be fodder for all you young pups.
I had a little talk with Ron Ferguson about what you are going through and why it happens. He clued me in last sunday in toledo. I really didn't want it to come out as a mean comment, and I hope it wasn't taken that way. I am a very curious person, and it just puts me in awe of someone that when I watch them be so smooth on the track and basically "whup" my butt in every race that we have been at. Hey, I have a good Handicap. I'm legally blind in my left eye after a 10 foot distance. You ever wonder why I stand on the left side of the drivers stand?? That's why. It sucks, but I'm there to have fun. I have had the pleasure of being in the main with you once or twice and it's cool to run with you fast guys.

Well, it's late and the Lansing "Officially Un-official" State champs are tomorrow. I got my car working good enough to put me 5th in the A last weekend in Toledo and be TQ by 2 laps last night at Larrys. It should be good enough to get me in the top 15 tomorrow, at least I hope. My Trinity Switchflex TT is looking good.

Talk to y'all later.

Tim
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Old 03-21-2004, 12:16 PM   #7292
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OK, I am live from The Gate and the second round of 1/12 stock has been concluded. I am 6th right now with one round to go. It is:
1. Wayne Gerber
2. Paule Ciccarello
3. Dana Bailes
4. Mo Denton
5. Ray Darroch
6. The Ole Shakey Guy
7. John Tortice
8. Greg Anthony
9. Eric Jones
10. Kelly Bean

More later.
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Old 03-21-2004, 12:18 PM   #7293
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Tim, I hope you have a wonderful race in Lansing. Say hi to Nick for me.
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Old 03-21-2004, 01:15 PM   #7294
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Quote:
Originally posted by finchy
Sorry to post this question. I'm thinking of getting into 1/12 scale. And would just like to know if CRC carpet knife has a web site. I've had a look at Yokomo and the Assocaited sites for cars> I won't ask what's better because 10 different people, 10 different answers. But are all these chassis alright to run on a smooth high speed asphalt track. What the differnce between the Oval and on road chassis.

Thanks in advance for reply's

Graeme
You might want to go with the CRC T-fource car instead of the Carpetknife if you have been looking at associated and yokomo. The Carpetknife can be run on pavement but is better suited to running on Carpet so it can knife the turns. Usually pavement tracks are a little more flowing and wide open for the nitro guys. I'm going to buy a T-fource car as soon as the money let's me. I have a CRC sixpack right now that I use for pavement and mod. I just won the local tracks 12th stock main last night with my Carpetknife over a L3 conversion. I also run my Carpetknife in a regional 19turn series and have it in the point lead right now. So I like the car.
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Old 03-21-2004, 04:58 PM   #7295
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Qualifying is over at The Gate and here is the order for the main.

1. Wayne Gerber, Jr.
2. Paul Ciccarello
3. Greg Anthony
4. Dana Bailes
5. Ray Darroch
6. Mo Denton
7. Dave Morrow
8. Jason Markovich
9. David Lee (That Ole Shakey Guy)
10.Rich Martsoff

As you can tell by looking at the time that the main has been run and here is the order of finish.

1. Paul Ciccarello
2. Wayne Gerber, Jr.
3. Mo Denton
4. David Lee (holding up the honor of 1/12 Masters)
5. Dana Bailes
6. Greg Anthony
7. Jason Markovich
8. Ray Darroch
9. Dave Morrow
10.Rich Martsoff

So, now they are tearing down the track to set the layout for the 2004 ROAR Carpet On-Road National Championships. Practice begins on Wednesday morning. More at that time.
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Old 03-21-2004, 06:19 PM   #7296
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Default ???

i finally got a good charger and dont want to abuse my new batteries. now i know there are alot of different factors to consider and a lot of different opinions,but what amperage would you guys charge your 4cell GP 3300's at?i dont know if it matters but they are PowerPush cells 1.172's and 1.170's and finally what i find most confusing is the voltage threshold setting displayed in millivolts

the charger is a Millenium pro and i run 1/12 stock.

thaks,
sean
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Old 03-21-2004, 06:54 PM   #7297
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Default what time does the Gate open on Wed?

anyone know what time the Gate will be opening Wednesday morning?
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Old 03-21-2004, 06:56 PM   #7298
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The track will open at 7 on Wed. with stock tc starting at 8. No cars are allowed on the track until 8.
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Old 03-21-2004, 08:36 PM   #7299
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Default Re: ???

You can't set the cutoff voltage when you use the NiMH setting on that charger. So use the NiCD setting, but choose the LINEAR one. Then choose number of cells, then set the peak at about 5mv/cell (20mv for the pack). Charge at 5 or 6 amps. The cells shoule be pretty warm, not hot, when done. About 125 degrees F.

The NiMH setting on that charger doesn't get them warm enough.

Quote:
Originally posted by sean
i finally got a good charger and dont want to abuse my new batteries. now i know there are alot of different factors to consider and a lot of different opinions,but what amperage would you guys charge your 4cell GP 3300's at?i dont know if it matters but they are PowerPush cells 1.172's and 1.170's and finally what i find most confusing is the voltage threshold setting displayed in millivolts

the charger is a Millenium pro and i run 1/12 stock.

thaks,
sean
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Old 03-21-2004, 09:12 PM   #7300
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Okay all,

Let me preface this by saying I am not sponsored by Speedmerchant-but the Rev4 I just built and ran is a dream to drive and its fast. by fast-I dont mean that in the hype sense-but in the carries corner speed, transitions fast and gets off the corner and goes sense. if you own a Rev3-I would try the Rev4.

DavidL-sweet-live reports!!!

Last edited by rayhuang; 03-22-2004 at 07:45 AM.
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Old 03-22-2004, 06:42 AM   #7301
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Quote:
Originally posted by davidl


1. Paul Ciccarello
2. Wayne Gerber, Jr.
3. Mo Denton
4. David Lee (holding up the honor of 1/12 Masters)
5. Dana Bailes
6. Greg Anthony
7. Jason Markovich
8. Ray Darroch
9. Dave Morrow
10.Rich Martsoff
Thanks for the update. Wow, it looks like Greg finally got a 1/12th scale that suits his driving style. Good job Greg. David, we knew you would be fast. What was the spread between racers? was there a blowout, or a freight-train of 10 cars?

Talk to ya later.

Tim
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Old 03-22-2004, 07:48 AM   #7302
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Quote:
Originally posted by Tim Stamper
Thanks for the update. Wow, it looks like Greg finally got a 1/12th scale that suits his driving style. Good job Greg. David, we knew you would be fast. What was the spread between racers? was there a blowout, or a freight-train of 10 cars?

Talk to ya later.

Tim
Tim,

Yeah-thats a good thing as the previous week-he would turn a blistering lap-then crash and take me and JOneser out, turn a few more fast laps-catch Joneser and I again and take us out-again!!!

Ray
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Old 03-22-2004, 09:46 AM   #7303
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Ya Ray, we ALL know I was aiming for you on purpose! BTW, I still have tc3 bumpers for sale, CHEAP!!! Ray has first dibbs... And Ray, there was nothing blisteringly fast about last week....

Timmay... you know what car it is...
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Old 03-22-2004, 09:59 AM   #7304
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Greg,

Thats so true-that weekend two weekends ago was a disaster in every respect!!!

Ray
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Old 03-22-2004, 10:53 AM   #7305
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Quote:
Originally posted by rayhuang
Tim,

Yeah-thats a good thing as the previous week-he would turn a blistering lap-then crash and take me and JOneser out, turn a few more fast laps-catch Joneser and I again and take us out-again!!!

Ray
Hey if Greg ONLY hits you twice that means he still likes you ....
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