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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 09-10-2010, 05:59 AM   #34456
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Futaba S9650 Mini Servo. Just cut the wings off and it is a perfect fit.
You will need a different servo save then comes with the 12r5.1 kit.
Kimbrough #114 is the one you need
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Old 09-10-2010, 11:16 AM   #34457
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Default New to 1/12th Scale

Hello everyone,

I'm very interested in getting into 1/12th scale racing, on both carpet and asphalt. I have a lot of questions though, and need lots of help. I'm sure there have been people posting asking for help just as I am but...with nearly 2300 pages in this forum I'm not about about to go sifting.
Anyways let me first say that I've raced 1/10th scale nitro touring cars for about 5 years, and recently have taken a break for a couple years, so I do know some stuff. I just need help getting into 1/12th scale.
One of the first things I need major help on is tires. In nitro racing, there weren't color coded tire shores, just numbers. What do all the colors mean, and what is best for certain surfaces? Also, I obviously want to be competitive and start out with a good car. What cars seem to be the most successful lately? Are there any new models coming out soon that I should wait for? I don't want to start out with something that's getting replaced real soon with a new model. Also, I'd appreciate it if you could just throw around some opinions about motors/batteries/speed controls/etc. I guess this is all I'll post for now, and I'll ask more questions as they come to me. Your help with any of my questions would be greatly appreciated.
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Old 09-10-2010, 03:22 PM   #34458
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Originally Posted by Luke W View Post
Hello everyone,

I'm very interested in getting into 1/12th scale racing, on both carpet and asphalt. I have a lot of questions though, and need lots of help. I'm sure there have been people posting asking for help just as I am but...with nearly 2300 pages in this forum I'm not about about to go sifting.
Anyways let me first say that I've raced 1/10th scale nitro touring cars for about 5 years, and recently have taken a break for a couple years, so I do know some stuff. I just need help getting into 1/12th scale.
One of the first things I need major help on is tires. In nitro racing, there weren't color coded tire shores, just numbers. What do all the colors mean, and what is best for certain surfaces? Also, I obviously want to be competitive and start out with a good car. What cars seem to be the most successful lately? Are there any new models coming out soon that I should wait for? I don't want to start out with something that's getting replaced real soon with a new model. Also, I'd appreciate it if you could just throw around some opinions about motors/batteries/speed controls/etc. I guess this is all I'll post for now, and I'll ask more questions as they come to me. Your help with any of my questions would be greatly appreciated.

Tire color codes:
http://www.rctech.net/forum/attachme...th_foam_10.gif
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Old 09-10-2010, 04:30 PM   #34459
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Originally Posted by Luke W View Post
Hello everyone,

I'm very interested in getting into 1/12th scale racing, on both carpet and asphalt. I have a lot of questions though, and need lots of help.....
I'd suggest starting with a car that is similar (or at least common) to what others at your club will be racing with. It will make it easier to get help or flesh out setup problems that you might run into. 12th scale can be finicky, sometimes something really small will make a big difference.

CRC GenXL and Associated 12R5 are pretty common and definitely competative. BMI with the old school front end is pretty straight forward for someone to help you with. Speedmerchant with the old front end is again straight forward. The newer front ends might be harder to help you with until people have them figured out a bit better.

Tekin RS speed control is common and pretty well sorted out (probably go with the RS / Tekin motor combo that is correct for the class that you'd be running, i.e. 17.5 or 13.5). I'm going with the new Novak Kinetic 1S and Ballistic combo but it isn't as well sorted out yet since the Kinetics are pretty new. The AE Black Diamond is interesting. It is really spendy and isn't computer programmable (has to be sent to the factory for firmware upgrades), but it's finite settings (have a handful of "profiles" for the various functions) might be, in a way, easier to setup and it is unquestionably fast. I'm not necessarily suggesting it, but it might be worth putting in your research queue.

Servo, Futaba 9650 or JR 3650 are the tops of my lists.

Thunderpower packs are well thought of 5000+MAh 50c (although I went with a budget pack from Protek 5000MAH 40c for less $ as I don't think I'll notice or need the 50c rate running 17.5). SMC and others make great packs too, probably won't go wrong if you just do a little research before buying. These are 1S LiPo hard case, but you probably already get that.

Depending on class, you'll want pinion / spurs capable of 60-100mm rollout. Plan to get a bunch of pinions, probably from about 40-60 tooth and a couple spurs 76,80,84 (car will probably come with 88). If you can do some research on your motor / class (ESC rules, sportsman or open) / track size, you can probably slim those down to maybe 2 spurs and a dozen pinions.

Hit up gearchart.com to make rollout charts. Tires will probably be cut and then worn down from about 46mm to 42mm. Consider a tire truer although your club or other members will likely let you use their's and they aren't cheap.

Receiver will be preferably something small but in the end depends on your radio.

Some people are using a voltage booster and some a receiver pack since 1S Lipo is 3.7v and that isn't really enough for stable receiver / servo operation. Take your pick there, I'm going with a small 220MAh 2S LiPo receiver pack from Protek.

Depending on car, front and center springs, tube lube (I'm using Shur Lube), shock oils (Losi or AE but stick to one brand) for tuning. Tire sauce (check what your track uses / allows). Diff lube, bearing oils, etc there (you probably have some of this, just thinking out loud). Camber gauge (RPM works fine and is cheap / simple), ride height gauge (I prefer non-stepped), front end alignment tools (I use Niftech, better than trying to eye it and setup stations for 12th scale aren't common). Other tools are common hex drivers, 3/16th socket type driver, pliers, etc. I have 4 mini digital scales for weight balancing / tweak setting and you can get those cheap off Ebay.

Tires will depend on class that you run, track surface, etc, easiest to make friends with your club members and ask what they run. Common to see something like Yellow rear / Lilac front Jacos and variations around that. Again, best to check with a local.

Hmm, did that cover most of it? The car you get will have setup suggestions which will get you started, so no point into going into that.

Biggest suggestion is to be as precise as you can on your setup, small things are big things in 12th scale.
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Old 09-10-2010, 06:04 PM   #34460
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Excellent info wile2k! I would almost say you don't need to sift through this whole thread after that post, but you should still sift through this whole thread. At least go back to 2009 posts.
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Old 09-10-2010, 08:48 PM   #34461
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Readily available to me is Jaco and Xceed tyres, what colour etc would be best to start with on an abrasive med to high grip tarmac surface (been surfaced with netball court paint) The surface has only recently been done and I don't know of anyone having tested it with 1/12.
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Old 09-10-2010, 08:58 PM   #34462
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Readily available to me is Jaco and Xceed tyres, what colour etc would be best to start with on an abrasive med to high grip tarmac surface (been surfaced with netball court paint) The surface has only recently been done and I don't know of anyone having tested it with 1/12.
Im not sure what track you race at in Melbourne, but i took my 1/12 to TFTR last year and it worked great there. From the above tyres, i would stay away from jaco on asphalt. The fronts are ok, but the rears dont work. I would get Xceed Med rears, hard fronts Jaco purple fronts work too.

Antoni
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Old 09-10-2010, 09:27 PM   #34463
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Im not sure what track you race at in Melbourne, but i took my 1/12 to TFTR last year and it worked great there. From the above tyres, i would stay away from jaco on asphalt. The fronts are ok, but the rears dont work. I would get Xceed Med rears, hard fronts Jaco purple fronts work too.

Antoni
I'm thinking ahead for Bendigo if I can get a handle of 12th scale quick enough. What tyres do you use outside of these brands? I will get those recommendations as practice will be at TFTR.
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Old 09-10-2010, 11:39 PM   #34464
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Joel Johnson is running Ron Rossetti's 1/12 scale Mod at TQ RC RACING

He got 9.6sec, it's the fastest lap time at TQ.

Check out the video.

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.


See you this Sunday, TQ Carpet Championship Series FINAL !!

www.tqrcracing.com
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Old 09-10-2010, 11:54 PM   #34465
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Originally Posted by WildManDriving View Post
I'm thinking ahead for Bendigo if I can get a handle of 12th scale quick enough. What tyres do you use outside of these brands? I will get those recommendations as practice will be at TFTR.
beside Xceed, Jaco, In Sydney we use speedmind as well last year National Champion won with speedmind tyres. we mainly use 35f/30r on green track. if steering is needed then 32f/32r. PM me if you want to try it.
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Old 09-11-2010, 01:33 AM   #34466
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WOW thanks a lot guys for all your help. That tire chart was exactly what I needed, and to wile2k, yes you have definitely answered all my questions. I'll have to study that post for a while to fully absorb it.
I'll be doing a little more research on a bunch of the stuff that you mentioned and will report back with any more questions if I have them. Thanks again.
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Old 09-11-2010, 03:15 AM   #34467
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hmm which to get ctc gen xl or associated r12r5.1 ???????????????
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Old 09-11-2010, 04:15 AM   #34468
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I'm thinking ahead for Bendigo if I can get a handle of 12th scale quick enough. What tyres do you use outside of these brands? I will get those recommendations as practice will be at TFTR.
CRC tyres work very well also These are what ill probably be running at the Nationals. Unsure of compound yet, need to test more
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Old 09-11-2010, 06:15 AM   #34469
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CRC tyres work very well also These are what ill probably be running at the Nationals. Unsure of compound yet, need to test more
The CRC tires are perhaps very slightly better than the exceeds, but the rims don't break. At the recent SA state titles CRC tires where on the 4 fastest cars on the track. We have prefered the feel of Magenta rears with purple fronts. I suggest people test around this combo as it has proven to be fast.
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Old 09-12-2010, 12:06 AM   #34470
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Thanks for this post. It had answered a couple of questions I was thinking about. This will be the first time I will be running a 12 scale on a track and a little nervous abut the speeds these can run.





Quote:
Originally Posted by wile2k View Post
I'd suggest starting with a car that is similar (or at least common) to what others at your club will be racing with. It will make it easier to get help or flesh out setup problems that you might run into. 12th scale can be finicky, sometimes something really small will make a big difference.

CRC GenXL and Associated 12R5 are pretty common and definitely competative. BMI with the old school front end is pretty straight forward for someone to help you with. Speedmerchant with the old front end is again straight forward. The newer front ends might be harder to help you with until people have them figured out a bit better.

Tekin RS speed control is common and pretty well sorted out (probably go with the RS / Tekin motor combo that is correct for the class that you'd be running, i.e. 17.5 or 13.5). I'm going with the new Novak Kinetic 1S and Ballistic combo but it isn't as well sorted out yet since the Kinetics are pretty new. The AE Black Diamond is interesting. It is really spendy and isn't computer programmable (has to be sent to the factory for firmware upgrades), but it's finite settings (have a handful of "profiles" for the various functions) might be, in a way, easier to setup and it is unquestionably fast. I'm not necessarily suggesting it, but it might be worth putting in your research queue.

Servo, Futaba 9650 or JR 3650 are the tops of my lists.

Thunderpower packs are well thought of 5000+MAh 50c (although I went with a budget pack from Protek 5000MAH 40c for less $ as I don't think I'll notice or need the 50c rate running 17.5). SMC and others make great packs too, probably won't go wrong if you just do a little research before buying. These are 1S LiPo hard case, but you probably already get that.

Depending on class, you'll want pinion / spurs capable of 60-100mm rollout. Plan to get a bunch of pinions, probably from about 40-60 tooth and a couple spurs 76,80,84 (car will probably come with 88). If you can do some research on your motor / class (ESC rules, sportsman or open) / track size, you can probably slim those down to maybe 2 spurs and a dozen pinions.

Hit up gearchart.com to make rollout charts. Tires will probably be cut and then worn down from about 46mm to 42mm. Consider a tire truer although your club or other members will likely let you use their's and they aren't cheap.

Receiver will be preferably something small but in the end depends on your radio.

Some people are using a voltage booster and some a receiver pack since 1S Lipo is 3.7v and that isn't really enough for stable receiver / servo operation. Take your pick there, I'm going with a small 220MAh 2S LiPo receiver pack from Protek.

Depending on car, front and center springs, tube lube (I'm using Shur Lube), shock oils (Losi or AE but stick to one brand) for tuning. Tire sauce (check what your track uses / allows). Diff lube, bearing oils, etc there (you probably have some of this, just thinking out loud). Camber gauge (RPM works fine and is cheap / simple), ride height gauge (I prefer non-stepped), front end alignment tools (I use Niftech, better than trying to eye it and setup stations for 12th scale aren't common). Other tools are common hex drivers, 3/16th socket type driver, pliers, etc. I have 4 mini digital scales for weight balancing / tweak setting and you can get those cheap off Ebay.

Tires will depend on class that you run, track surface, etc, easiest to make friends with your club members and ask what they run. Common to see something like Yellow rear / Lilac front Jacos and variations around that. Again, best to check with a local.

Hmm, did that cover most of it? The car you get will have setup suggestions which will get you started, so no point into going into that.

Biggest suggestion is to be as precise as you can on your setup, small things are big things in 12th scale.
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