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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 12-07-2014, 04:25 PM   #41776
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Team Purple is a good tire. It matches well with Blue rears in Super Stock and even Mod.

I'll risk a public correction and say that Team Purple is actually in the Pink family and is a Lilac-ish 37 or 38 shore compound. Harder than Magenta.
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Old 12-07-2014, 06:15 PM   #41777
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Question about BSR.
Does new Black rear wheel from BSR have off set? And what is the diameter of front and rear wheel? (Not tire, wheel itself)
Also is it acetone safe flex material?
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Old 12-07-2014, 06:28 PM   #41778
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Quote:
Originally Posted by PutAwayWet View Post
Team Purple is a good tire. It matches well with Blue rears in Super Stock and even Mod.

I'll risk a public correction and say that Team Purple is actually in the Pink family and is a Lilac-ish 37 or 38 shore compound. Harder than Magenta.
Team purple on the front is really easy to drive in mod, yes, but it just doesn't have the steering to be on pace. I think blue or magenta fronts will always be a couple tenths faster than the team purples, if not more.

Team purple/green might be better, especially for super stock, but I think magenta or blue is still a better front tire choice in nearly all situations.
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Old 12-07-2014, 07:27 PM   #41779
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I have limited experience racing on carpet and was wondering why the car rear would ''wiggle'' under hard acceleration coming on to the straight?

Side springs too soft? Tube lube too thin?

Current side spring is Yokomo R12-21SS and tube lube is CRC 10K.

The grip and handling is there, it's just had a wiggle, wiggle.

Not this kind of wiggle, https://www.youtube.com/watch?v=hiP14ED28CA.
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Old 12-07-2014, 09:02 PM   #41780
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Quote:
Originally Posted by InspGadgt View Post
So where does Team Purple fit into the mix?
See quote below.

Quote:
Originally Posted by PutAwayWet View Post
Team Purple is a good tire. It matches well with Blue rears in Super Stock and even Mod.

I'll risk a public correction and say that Team Purple is actually in the Pink family and is a Lilac-ish 37 or 38 shore compound. Harder than Magenta.
This is correct. I think that for over all speed it's not going to be the fastest at a big race but for club racing may be a good option


Quote:
Originally Posted by H I View Post
Question about BSR.
Does new Black rear wheel from BSR have off set? And what is the diameter of front and rear wheel? (Not tire, wheel itself)
Also is it acetone safe flex material?
BSR is the same as CRC, the front and rear rims are just under 38mm..... 37.7 give or take. Acetone is safe for all nylon wheels (with limited soak time), just not ABS plastic wheel.

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Old 12-07-2014, 10:32 PM   #41781
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Quote:
Originally Posted by RedBullFiXX View Post
Our track at TQ could be in that 5%
It's more like indoor asphalt Med grip, than carpet

(Old dirty rug)
i sauced full today on ulti's x hard front and x med today at tq and still pushed in my 13.5 car i think the mechanic sucks
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Old 12-07-2014, 11:07 PM   #41782
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Quote:
Originally Posted by Monti View Post
This is correct. I think that for over all speed it's not going to be the fastest at a big race but for club racing may be a good option
Monti
I ran Team Purple front and Green rears at the IIC...overall it felt good and really consistent through the whole run which I've struggled with in the past. But it was a little more free in the rear than I like. I like the Team Purple front and Blue rear combo I ran the year before a bit better. But given how different the grip was between the 2 years it is hard to say for sure.

Locally we've been running Team Purple front and Green rear on asphalt and it has worked well for us on the CRC cars though we have to full compound the front. Our track is pretty bumpy and banked around the outside so going softer on the springs really isn't an option or the car bottoms out and spins. Going to the Xray car the tires are still good but can be a bit unpredictable in the rear at times so I'm thinking going to Blue rears and Double Blue fronts might be a good choice. The grip can be really good in some corners so I don't think we need to go quite so soft as Orange or Red. Thoughts?
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Old 12-08-2014, 12:46 PM   #41783
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Quote:
Originally Posted by InspGadgt View Post
Locally we've been running Team Purple front and Green rear on asphalt and it has worked well for us on the CRC cars though we have to full compound the front. Our track is pretty bumpy and banked around the outside so going softer on the springs really isn't an option or the car bottoms out and spins. Going to the Xray car the tires are still good but can be a bit unpredictable in the rear at times so I'm thinking going to Blue rears and Double Blue fronts might be a good choice. The grip can be really good in some corners so I don't think we need to go quite so soft as Orange or Red. Thoughts?
Orange and red are about the same firmness as green and blue. These compounds seem to work best in asphalt conditions I am sure results can vary.

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Old 12-08-2014, 03:38 PM   #41784
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Does anyone sell the new blu/grn/ d.blu foam unmounted?
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Old 12-08-2014, 03:41 PM   #41785
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Quote:
Originally Posted by SLOWINSLOWOUT View Post
Does anyone sell the new blu/grn/ d.blu foam unmounted?
I think yokomo does if you can find it and figure out what is what.

Also I believe Ultis are available as doughnuts.
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Old 12-08-2014, 04:23 PM   #41786
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Yes, Ultis are available as umounted donuts through KO Propo Americas.

I think I will try running Green on the back of my modified car next, it seems like it might do well. Hopefully better than Magentas, which gummed up well and gave great grip after 2 minutes but were garbage before that.
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Old 12-10-2014, 06:17 PM   #41787
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For those who are wondering what tire brand Marc R. was running on his 1/12th they're called PM3 GX. The are the 2014 IFMAR World Championship, JMRCA All Japan Championsip 2014, and AOC championship 2014 winning tire. Worth checking out.

http://kimihiko-yano.jp/blog/archives/14852
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Old 12-12-2014, 11:22 AM   #41788
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What servo savers do you guys run? I've been running Kimbrough medium but I don't think it's giving me enough ackerman on my mod car.
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Old 12-12-2014, 11:30 AM   #41789
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Quote:
Originally Posted by DesertRat View Post
What servo savers do you guys run? I've been running Kimbrough medium but I don't think it's giving me enough ackerman on my mod car.
I run the XRay one, but you can just shim the servo itself or shim the ball ends where they thread into the servo saver to add or remove ackerman.
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Old 12-12-2014, 02:19 PM   #41790
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I run the Tamiya.

http://www.tqrcracing.com/shop/produ...w.asp?p_id=914
and
http://www.tqrcracing.com/shop/produ...w.asp?p_id=915
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