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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 06-05-2013, 11:08 PM   #39466
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Unless you have esses requiring a quick change of direction, I would start with 20-25K silicone in the tubes. Watch for any sign of drag marks along the edges of the chassis which would indicate a need for stiffer side springs, or along the edges of the back of the chassis or the front of the lower pod plate which would indicate a need for a stiffer center spring.
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Old 06-05-2013, 11:18 PM   #39467
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Good starting point for an asphalt setup.

Center shock:25-35 wt.
Center spring:Medium to Hard
Side tube lube: 7,000-10,000
King pin lube: 10,000
Side spring: Med/Hard or Hard
King pin spring: Med/Hard or Hard - depending on traction levels.

Very stable and easy to drive on asphalt, but tires will make or break your setup, especially on asphalt.
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Old 06-06-2013, 01:59 AM   #39468
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Quote:
Originally Posted by CarlosG. View Post
Lonny, my kit came with tubes. I wanted to get away from the center shock since I had that on the 12R5 that I had owned. I use to race asphalt so I know about ride height. My particulars about the setup are more like what springs to use, shock oils, and lube for the tubes? I have it built exactly like the instructions say. The only problem I had was the main chassis sat lower than the rear pod. I found that the washers that were used to hold the transponder to the chassis of the 12r5 where just thin enough to make it level and even with each other.
I want to thank you guys for the help and information you have given.
fyi, the AE pivot balls work smoothly and they are a little taller so the plates line up without shimming.
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Old 06-15-2013, 02:12 AM   #39469
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Default Rollout 10.5 Blinky

What rollout are you using in 10.5 Turns blinky? I am using a Trinity D3.5 and I am trying Rollouts around 70mm but I can't figure out what works best.
Thx
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Old 06-15-2013, 07:50 PM   #39470
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Does anyone have any feedback on the Protoform TR-12? How does it compare to the AMR and the Mohawk? I've been running a Mohawk in blinky 13.5 on a small low-med grip track and I've been pretty happy, but it's time for a new shell.
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Old 06-15-2013, 09:06 PM   #39471
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I've run it on an On Point 12C and a BMI CH12. It has more steering than either the AMR or the Mohawk, as well as more overall down force. For me the main drawback is that it is a bit of a tight fit around the pod shock mount, substantially narrower than the others. Also, the rear fenders seem to be uneven, I had to raise the left rear body mount compared to the right one to keep the back level.
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Old 06-15-2013, 09:09 PM   #39472
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Quote:
Originally Posted by Csaari77 View Post
Does anyone have any feedback on the Protoform TR-12? How does it compare to the AMR and the Mohawk? I've been running a Mohawk in blinky 13.5 on a small low-med grip track and I've been pretty happy, but it's time for a new shell.
Mohawk is my favorite for all-around best balance
TR12 is very good too, with a touch more rear bias by comparison
AMR is still the industry standard, but imo, doesn't look as cool, or modern as the hawk
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Old 06-16-2013, 12:00 AM   #39473
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I haven't tried the TR12 yet but after seeing one at the track I just might...it looks much better in person than it does in pics. That said my favorite body still is the Parma Speed 8HD. That one just works really well for me.
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Old 06-16-2013, 01:04 AM   #39474
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I think the TR12 has more rear downforce and thus less steering than an AMR. I know Mike Haynes has been using a TR12 and killing it, but I prefer the AMR for mod.

For blinky 13.5 I would recommend the AMR and the black art audi r8. Both are good, and I would recommend choosing based on how aggressive of a car you like.

Can anybody who is familiar with the AE cars comment on whether the center shock for the 12r5 always requires lower weight shock oil when compared to a silva or other center shock? I have noticed that most mod setups for the 12r5 only use 25 or 27.5 wt oil and am trying to figure out why...?
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Old 06-16-2013, 06:12 AM   #39475
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I don't have a silva shock or an AE but I think I'm running 25 in my HB shock and 30 in my encore.
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Old 06-16-2013, 07:35 AM   #39476
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anyone can kindly suggest how the rollout is calculated please!
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Old 06-16-2013, 08:26 AM   #39477
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Originally Posted by choisan View Post
anyone can kindly suggest how the rollout is calculated please!
(pinion teeth) x (tire diameter) x 3.1416 / (spur teeth)
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Old 06-16-2013, 09:36 AM   #39478
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Thanks Howard, learnt the rollout, please kindly advise what are the corresponding settings to this calculated rollout. I am a freshman to ep, especially 1/12. Appreciate that.
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Old 06-16-2013, 09:49 AM   #39479
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Quote:
Originally Posted by wingracer View Post
I don't have a silva shock or an AE but I think I'm running 25 in my HB shock and 30 in my encore.
Hmm. So for background, with a HB shock on my CEFX, I have always been advised to run 40wt or so. Mostly this was to gain steering. Considering the 12r5 is inline to begin with, I am just surprised to see such low shock oil weights, unless the shock has a one hole piston or something, heh.

For the guy asking rollout questions, are you asking about rough starting points for rollout depending on motor?
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Old 06-16-2013, 10:35 AM   #39480
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To be exact, i have heard people saying rollout. But i shall ask what should i use rollout for? Calculating the gear ratio? Sorry for being naive.
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