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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 12-17-2014, 08:37 AM   #41821
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Quote:
Originally Posted by EDWARD2003 View Post
Here are the videos you requested toroloco.

Pod Sag
https://m.youtube.com/watch?v=q6Hjn00gXug

Pod Droop
https://m.youtube.com/watch?v=suI3uKzmwew

Shock Settings Which Adjust Pod Droop and Sag. Quick explanation.
https://m.youtube.com/watch?v=7iAyynq1VKI
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Old 12-17-2014, 08:49 AM   #41822
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Glad I could help you and others out. I quite enjoy making these videos. Maybe my next video will be on gluing tires, inspecting tires, and tire truing.
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Old 12-17-2014, 02:20 PM   #41823
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Edward, is that collar at the ball cup part of the stock Kyosho center shock or an aftermarket bit? I have not seen one that has the adjustable collar at the ball cup end before.
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Old 12-17-2014, 05:10 PM   #41824
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Quote:
Originally Posted by chris moore View Post
Edward, is that collar at the ball cup part of the stock Kyosho center shock or an aftermarket bit? I have not seen one that has the adjustable collar at the ball cup end before.
That collar is standard with the Plazma shock. See picture.
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Old 12-17-2014, 06:48 PM   #41825
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Yes, it comes standard with the shock. TN Racing offers an aluminum version. http://www2.odn.ne.jp/tnracing/top1.htm
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Old 12-17-2014, 07:47 PM   #41826
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I picked up a CRC Gen XL a few weeks ago to try my hand at 1/12.I have broken 2 of the rear top plates.Is there an upgrade or mod I could do to resolve this issue?
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Old 12-17-2014, 07:51 PM   #41827
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Quote:
Originally Posted by bprc10T3 View Post
I picked up a CRC Gen XL a few weeks ago to try my hand at 1/12.I have broken 2 of the rear top plates.Is there an upgrade or mod I could do to resolve this issue?
They make a thick top plate, that's what you need. Until you get the thick version you will continue to break them.
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Old 12-17-2014, 08:10 PM   #41828
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Quote:
Originally Posted by Kave View Post
They make a thick top plate, that's what you need. Until you get the thick version you will continue to break them.
Do you by chance know the part #?
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Old 12-17-2014, 08:27 PM   #41829
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http://ashfordhobby.com/detail.aspx?ID=8011

The other option is to get another motor plate to put on the left side and use this:

http://ashfordhobby.com/detail.aspx?ID=10710
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Old 12-17-2014, 08:31 PM   #41830
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Quote:
Originally Posted by bprc10T3 View Post
Do you by chance know the part #?
CRC offers an optional 4mm top grapite pod plate - #1764.
That top plate is much thicker and more durable than the standard graphite part, that does tend to break fairly easy.

However CRC also offers 2 other optional bits to achieve an even better and stronger rear pod. For the ultimate CRC rear pod, use a #3342 aluminum left hand bulkhead pod plate in combo with a #1763 full box rear top graphite plate. With those two option parts fitted, the CRC rear pod becomes a fully boxed unit that is super stiff and nearly indestructable. Wire access for the motor becomes slightly less convenient with the fully boxed rear pod, but IMO the improvement is pod strength is well worth having. If you are like most guys, how often do you remove your brushless motor anyway?
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Old 12-17-2014, 09:02 PM   #41831
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Thanks guys.Will give the thick plate a shot first.Hope it will fix the problem.
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Old 12-18-2014, 08:48 PM   #41832
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I've got one last question about shock length-

I were to lengthen the shock, and move the front of it to a more forward mounting hole, but keeping the droop and sag the same, what would happen?
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Old 12-18-2014, 08:57 PM   #41833
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Quote:
Originally Posted by BadSign View Post
I've got one last question about shock length-

I were to lengthen the shock, and move the front of it to a more forward mounting hole, but keeping the droop and sag the same, what would happen?
You would gain high speed steering and high speed stability at the expense of some low speed/off power steering.
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Old 12-18-2014, 11:59 PM   #41834
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Default Drag Racing!!!

Ok. I just found this thread, and need some help.
At my LHS we have some drag racing occasionally.
It is held indoors and is carpeted.
It is basically a go when the lights come off, 10 meters to the finish, and then brake. If you cant brake quick enough then there is a ramp then a wall to drive up (kinda like a half pipe at a skate park). Its totally fine if you go up the wall though and try for a flip or whatever. (Will not be doing this in a pan car)
I was wondering if there are any pan car chassis that will handle a 35 amp brushless system (Sensorless hobbywing 13 turn 3300kv) on a THREE cell lipo. (2200mah)
Currently I have it in my HBX quakewave (a 1/10 buggy) and it hits 60kmph on a 2 cell, so probably 85 kmph with the 3 cell.
I was thinking a pan car would be perfect because it is light, and can also be used for other things because it can actually go round a corner.
Basically, does anybody know of a cheapish chassis (does not have to be carbon fiber or be the quickest round a corner) that can handle a 13 turn brushless on 3 cell lipo power?
Thanks all.
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Old 12-19-2014, 11:18 AM   #41835
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We had a video made at round 2 of the BRCA 1/12 nationals. The intention is for it to be something that drivers can show to fellow racers in the hope of coming to try out national level racing with us. As well as being something for newcomers which gives a brief insight into what RC racing looks like.

https://www.youtube.com/watch?v=Lz8nN4XtapM
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