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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 08-01-2005, 11:41 PM   #13936
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tekone

this is how I run stock, there is no mod class where I run at the moment

Motor - Epic Roar stock geared to about 1.65" rollout (suit to track)

Servo - futaba 9602 good servo, I can't afford $100 for the KO 949

Tires - Asphalt - Right now I'm running green rear and dbl pink front, be careful with the sauce on the front, go purple front if you wan a little security.

tires - carpet - Rear - White maybe Grey for a T-bar car. Front purple

i like to run damper tubes but you will need to replace the brace and the motor top plate, if you run carpet I have heard good things about the rugrat conversion.

Where I race the three wise men (or whatever you want to call them. We have yet to discover what it is they are wise about) all run the yokomo car and have some good success with it.

Chris
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Old 08-01-2005, 11:48 PM   #13937
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Quote:
Originally Posted by crimson eagle
tekone

this is how I run stock, there is no mod class where I run at the moment

Motor - Epic Roar stock geared to about 1.65" rollout (suit to track)

Servo - futaba 9602 good servo, I can't afford $100 for the KO 949

Tires - Asphalt - Right now I'm running green rear and dbl pink front, be careful with the sauce on the front, go purple front if you wan a little security.

tires - carpet - Rear - White maybe Grey for a T-bar car. Front purple

i like to run damper tubes but you will need to replace the brace and the motor top plate, if you run carpet I have heard good things about the rugrat conversion.

Where I race the three wise men (or whatever you want to call them. We have yet to discover what it is they are wise about) all run the yokomo car and have some good success with it.

Chris
Don't listen to Chris (or the three wise men) if you want to stay slow...he, he...

Wise men = jrrc, odpurple and crashby

Actually, Chris is the fourth muskateer!

Action at Ripon gentlemen...

Bill
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Old 08-01-2005, 11:57 PM   #13938
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Tekone- Even though i really like the Speedmerchant Rev 4 I really would like to suggest Josh's car as an option for you to consider. You are right at his track and he and everyone else would be able to really get you dialed on that car and parts for it would be right from the source. There are a couple of guys i'm thinking of (a father/son combo) there who are awesome guys, the son's nick name when he gets mad is "dr. evil" and his dad is an awesome painter of rc bodies. I think the son's name is Dave, i met them last year at the Norrca Nat's so look them and Josh up.

The car itself from what little i've seen around here works great so you may want to talk to them first and see what they can do for you.

Regarding general info i personally like the following list but others here may be able to steer you better.

- Servo= JR 3550Z
- Speedo= Novak GTX
-Batteries= SMC 3800
-Motors= DC Motors (Mod and Stock)
-Bodies= Speed 12 (Protoform) or Speed 8 (Parma) and Josh's bodies work really well but i don't remember the designation(s).
-Tires=T.M. Tires (there are others like Jaco, TRC,Parma and BSR, all are great)
-Traction Compound= Paragon Ground Effects

-If you still have questions i am sure that more knowledgable people will be able to answer from here. HTHs.
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Old 08-02-2005, 12:15 AM   #13939
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Bill,

Yes I'm looking forward to Ripon this weekend, my T-fource was nails last time out, I went to the greens on the back and could hold full throttle though the carousel and the esses, was never able to do that before. First time the MS2.2 was not the best car at Ripon but there was a couple of issue with it which i think I have corrected.

While I remember Bill....

I'm the FIRST Musketeer.

Chris.
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Old 08-02-2005, 12:56 AM   #13940
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Quote:
Originally Posted by crimson eagle
Bill,

Yes I'm looking forward to Ripon this weekend, my T-fource was nails last time out, I went to the greens on the back and could hold full throttle though the carousel and the esses, was never able to do that before. First time the MS2.2 was not the best car at Ripon but there was a couple of issue with it which i think I have corrected.

While I remember Bill....

I'm the FIRST Musketeer.

Chris.
you mean ( mouseketeer ) dont you. My car was bottoming out last race, my bad, your minced chicken next time.LOL
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Old 08-02-2005, 01:03 AM   #13941
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Quote:
Originally Posted by crimson eagle
Yes I'm looking forward to Ripon this weekend, my T-fource was nails last time out, I went to the greens on the back and could hold full throttle though the carousel and the esses, was never able to do that before.
Join the NorCal T-Fource club

Mine is too dialed to run in stock...I run 12th scale stock on the same basis the Pope eats a McChicken (stock 12th costs too much to do good in)

In Mod it handles very good except some for some weird mid-corner handling characteristics followed by a bit of a push (understeer) so I'm gonna play around with side springs next time out
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Old 08-02-2005, 03:36 AM   #13942
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A quick question I hope.....

I'm going to work my way up to mod in 1/12 by having a 19t first. What would be a good starting ratio with a Parma purple/pink front/rear combo to last 8 minutes (with say 30 seconds to spare as a starting point) with 3700mah on this track.....

http://www.mrccc.org.nz/forums/viewtopic.php?t=1272

To give an idea of scale the straight is 45 metres long.

I only ask because of the local club members I'd be the first to run 19t (only one of 3 with a 1/12th I think anyway). The visitors with 12th run mod.

As for motor, I was thinking of getting an Eliment I think it's called as it's available locally.

Thanks in advance
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Old 08-02-2005, 06:55 AM   #13943
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Gotyour #

I have to admire your tenacity, no matter how many times I whip your ass you still keep talkin'.

BK,

yes I do like 19T and Mod however I would be racing on my own which is no fun. I'd rather join in with the other 8 or 9 stock guys and keep the class going than fragment it by splitting the class up. It's not as slow as I thought it would be, we are doing the same lap times as 19T sedan. I'm not running side springs at all, I think it's makes the car more predictable, you may need to go with a softer tire in the front though.

Chris
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Old 08-02-2005, 09:28 AM   #13944
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Quote:
Originally Posted by JRX-S Bill
Don't listen to Chris (or the three wise men) if you want to stay slow...he, he...

Wise men = jrrc, odpurple and crashby

Actually, Chris is the fourth muskateer!

Action at Ripon gentlemen...

Bill
OD and I will not make the Ripon race this weekend as OD has a honey do list!!! I told him to be careful what he wished for.

The Ground Pounders changed their decision to run the 1/12th race in two different directions and will run the race in the traditional manner. Because we (jrrc, OD and I) gave them such grief about running the race in two directions, we had better show up now that they changed it back.

This Sunday, 1/12th 19T will be the featured class this month which means trophies first through third. They will be racing at Peterson Cat this month which is about thirty minutes less driving time than last month when the race was held in Cloverdale.

So let's get there and support our fellow racers in the north!
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Old 08-02-2005, 01:33 PM   #13945
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Quote:
Originally Posted by Crashby
OD and I will not make the Ripon race this weekend as OD has a honey do list!!!
That's two "gift" positions for me...
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Old 08-02-2005, 01:39 PM   #13946
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I'm off to Bermuda for the week.
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Old 08-02-2005, 01:42 PM   #13947
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Quote:
Originally Posted by jrrc
I'm off to Bermuda for the week.
Then that makes three...I may just have to concentrate on TC then.
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Old 08-02-2005, 04:38 PM   #13948
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How does the protoform Speed 12 body compare with some of the other high end bodies? I definately like the gourney flap on it, that could make it easy to dial in some more traction in a hurry.
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Old 08-02-2005, 06:54 PM   #13949
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Quote:
Originally Posted by crimson eagle
Gotyour #

I have to admire your tenacity, no matter how many times I whip your ass you still keep talkin'.

BK,

yes I do like 19T and Mod however I would be racing on my own which is no fun. I'd rather join in with the other 8 or 9 stock guys and keep the class going than fragment it by splitting the class up. It's not as slow as I thought it would be, we are doing the same lap times as 19T sedan. I'm not running side springs at all, I think it's makes the car more predictable, you may need to go with a softer tire in the front though.

Chris
You have never and never will beat me in mod.

Last edited by gotyournumber; 08-02-2005 at 09:14 PM.
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Old 08-02-2005, 06:55 PM   #13950
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Chris you on your own this week, i will be oval racing down south, you are sure to win.
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