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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 12-18-2005, 09:13 PM   #16336
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Well that kinda sucks, Hopefully it picks up. Thats the whole reason I bought it so I could come and play when it is 20 below out. Its really hard to drive a nitro sedan in the snow.
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Old 12-18-2005, 09:25 PM   #16337
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Quote:
Originally Posted by GrandeGixxer
Well that kinda sucks, Hopefully it picks up. Thats the whole reason I bought it so I could come and play when it is 20 below out. Its really hard to drive a nitro sedan in the snow.
Have you ever run 1/12th before?
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Old 12-18-2005, 09:32 PM   #16338
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I have been driving it here at a local carpet track that is pretty new and kinda bumpy. I can hang with the 19t sedans. It is definatly a twitchy little bastard but I think I am figuring it out. It is nice to have batteries that alow you to run a 15 minute practice run. It is a fun car to drive. I have more fun with it than I do my gas car.
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Old 12-18-2005, 09:36 PM   #16339
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eh who cares about 19 turn, we should just drop in 7 turns and see who can last at least 5 minutes
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Old 12-18-2005, 11:33 PM   #16340
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Gang!
Here's a risky question that I will put out here: I seem to be having trouble at my local track with the newest and latest verion of CRC Fast Track carpet with the rubber backer. It is seemed and stretched over a smooth concrete floor. The majority of the racers use TQ traction sauces; 12th guys have been using TQ Plus, the 8 minute sauce. Our mod group is having trouble getting our cars to run for 8 minutes without a major handling change up. Most of us loose rear grip around 6-7 minutes while another looses front grip. I have been doing this for 20 years and this has been a real head scratcher. The rest at the track are not rookies either. We have tried just about every tire manufactured with just about every chassis set up.

So the question is: has anyone else suffered this issue and found a solution?
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Old 12-18-2005, 11:37 PM   #16341
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Quote:
Originally Posted by Slapmaster6000
Gang!
Here's a risky question that I will put out here: I seem to be having trouble at my local track with the newest and latest verion of CRC Fast Track carpet with the rubber backer. It is seemed and stretched over a smooth concrete floor. The majority of the racers use TQ traction sauces; 12th guys have been using TQ Plus, the 8 minute sauce. Our mod group is having trouble getting our cars to run for 8 minutes without a major handling change up. Most of us loose rear grip around 6-7 minutes while another looses front grip. I have been doing this for 20 years and this has been a real head scratcher. The rest at the track are not rookies either. We have tried just about every tire manufactured with just about every chassis set up.

So the question is: has anyone else suffered this issue and found a solution?
Having the same problem and have yet to find a solution. Though IIRC I didn't have the problem when I ran my Corally (Corally tires)... I'll be going back to racing my Corally pretty soon most likely and I'll let you know...
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Old 12-18-2005, 11:49 PM   #16342
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What kills me, is that all the same tires worked very well on the carpet we had before which was some kind of Ozite knock off that got all fuzzy. I have been to other tracks in our region and can not find this issue. I guess that's why I am asking about the Fast Track carpet with TQ sauce. If Paragon is present, then it would be a hole different ball game.

Deep down, I feel that it's a tire/chassis set up that I have just not hot upon just yet.

Does anyone know if this is happening at Stockton?
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Old 12-19-2005, 06:25 AM   #16343
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Slapmaster,Having the same problem at the home track.The LHS switched to the CRC ozite this winter.It seems to ooze the traction compounds which builds up a glaze on the foams.If your not meticulous about cleaning them each round thats how they behave.Been trying all kinds of ideas.Seems alcohol or baby wipes work for some.I skim/true my foams each round.Hope this helps some.Mario.
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Old 12-19-2005, 06:33 AM   #16344
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Ive been having the same problem also. I mostly contribute it to a setup problem because im new to 1/12 but around the 5-6 minute mark I start pushing pretty hard. We have new CRC carpet the version 2 stuff i think its called but it has a ton of traction. I dont put any Paragon GE on the front tires and that seems to help a little bit but I do notice that they get "glazed" or dirtied up after a run. Most of the racers in my area use lighter fluid (cheap stuff yellow bottle with a blue top) to clean thier tires, that stuff works really good. just squrit some right onto the tire and let it set for a second or two then wipe it off as if u were wiping traction compound off. Bam clean fresh tire for more traction compound.
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Old 12-19-2005, 06:55 AM   #16345
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Quote:
Originally Posted by Slapmaster6000
What kills me, is that all the same tires worked very well on the carpet we had before which was some kind of Ozite knock off that got all fuzzy. I have been to other tracks in our region and can not find this issue. I guess that's why I am asking about the Fast Track carpet with TQ sauce. If Paragon is present, then it would be a hole different ball game.

Deep down, I feel that it's a tire/chassis set up that I have just not hot upon just yet.

Does anyone know if this is happening at Stockton?

Brian,

Yes I was having the same problem with TQ max (orange). Way to twitchy for the first minute but good at the end or good for the first minute and too pushy at the end. This week we started allowing niftech sauce and it's VERY consistant. You will need to sauce the front more and sauce multiple times but it was working very well. The only issue that may arise is that if we go to niftech exclusively, when the tq comes off what will happen. It is the most consistent i have ever had a 12th scale run from first to last minute in stock and 19T.

Chris
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Old 12-19-2005, 07:02 AM   #16346
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Can someone please refresh my memory on the proper way to shim the slop out of the front suspension?? (Tforce)

Thanks,
Kevin
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Old 12-19-2005, 07:12 AM   #16347
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Just got back from a 2-day race in Mandan, ND where they bought the carpet that had been used at this years Cleveland race. It was my first race on the new Ozite. I used the Niftech compound--saucing early and rubbing it into the rear tires, inside half of the fronts and letting it soak-in on its own. In one early round it seemed to get a little loose at the rear at about 6-7 minutes but other than that the traction seemed good. I bought the Niftech compound when I was picking up some other parts from them and Ray told me about their stuff. He said the idea behind their product is it isn't supposed to get "sticky" so it doesn't get a lot of "pick-up" on the tires. Other than the odd little bits of this and that on the tires when I pull it from the track the tires really were cleaner than I'd seen with the TQ, Trinity, or Paragon that I'd used before. The tires also felt (and looked) much like they did when I put the car on the track. It also didn't seem overly affected by other compounds on the track and I saw people using just about everything.

fwiw, it's not like I was out circulating at the back--I qualified 4th in the 'A' out of 23 drivers. The guys there put on a GREAT event, especially for a small club. There were racers from ND, SD, MN, MT, and Canada. About 1100 miles round trip for us. I've just moved from Seattle to Billings, MT--told my buddy that 6 degrees below just wasn't cold enough for me now, I had to go to Minot where I could experience double-digit below PLUS a 40-knot wind...

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Old 12-19-2005, 07:50 AM   #16348
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Slapmaster6000,
If this is the same carpet that was at the Indoor Champs, many people were chasing setups. There was less side bite. I had to run softer tires all around, a softer t-bar, and front suspesion springs. I ended up with CRC magenta rears and soft plaid fronts, .074" t-bar, and .018 springs. I ran niftech traction and it stayed costant the whole run.
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Old 12-19-2005, 08:06 AM   #16349
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Can someone explain how changing the servo mounting position changes handling? I race on carpet and most of the guys swear by laying the servo down directly on the chassis, so I did the same and never tried the servo mounts. I'm thinking about trying the servo mounts just out of curiosity and was wondering what I should be looking for.
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Old 12-19-2005, 08:12 AM   #16350
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we are running the new crc carpet as well. our track allows paragon, but i am using niftech. as long as you let it dry on the tire it seam to keep tracking the full eight min.
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