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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 02-26-2005, 02:02 AM   #11371
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Quote:
Originally posted by brianhackett
yeah, but 12th scale 6 cell mod it Faaaaaaaaaaaaasssttttttttttt!
Wow
Too fast for an indoor setup using friggin RoadRail. God I hate that stuff.

I saw a guys 1/12th bobble at the end of a long straight miss the 90-degree turn and hit the roadrail at full steam ahead.

The car literally LAUNCHED like from a ramp and FLEW about 10 feet into the air before re-kitting itself against a concrete wall.

With 6-cells I'd bet on the car leaving a hole in the wall on it's way into orbit.
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Old 02-26-2005, 03:12 AM   #11372
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Default Re: Question:

Quote:
Originally posted by Soviet
Why don't they make premounted rubber tires for outdoor 1/12th? I would guess Takeoff could make some sweet 1/12th rubber.
Answer:
John's BSR tires are coming out soon with radials just in time for asphalt racing. Kinda pricey but nice.
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Old 02-26-2005, 05:31 AM   #11373
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Quote:
Originally posted by Soviet
Too fast for an indoor setup using friggin RoadRail. God I hate that stuff.

I saw a guys 1/12th bobble at the end of a long straight miss the 90-degree turn and hit the roadrail at full steam ahead.

The car literally LAUNCHED like from a ramp and FLEW about 10 feet into the air before re-kitting itself against a concrete wall.

With 6-cells I'd bet on the car leaving a hole in the wall on it's way into orbit.
This is why they wer converted to 4 cells. Too dangerous. Also the same reason the nationals dropped 10th pan car w/ 6 cell mod. Those things were missles on foam. Rumor is that DOseck had one that was clocked at over 80 mph. Out accelerated the gas 1/8 scale for the first 60 feet. . But the insurance companys prob. stepped in w people getting hurt and well you know the rest.
RIP 6 cell pan car modified
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Old 02-26-2005, 05:32 AM   #11374
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Default Re: Question:

Quote:
Originally posted by Soviet
Why don't they make premounted rubber tires for outdoor 1/12th? I would guess Takeoff could make some sweet 1/12th rubber.
I believe it was tried before and the Idea just never took off. 12th scalers love their foams.
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Old 02-26-2005, 08:54 AM   #11375
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Quote:
Originally posted by brianhackett
This is why they wer converted to 4 cells. Too dangerous. Also the same reason the nationals dropped 10th pan car w/ 6 cell mod. Those things were missles on foam. Rumor is that DOseck had one that was clocked at over 80 mph. Out accelerated the gas 1/8 scale for the first 60 feet. . But the insurance companys prob. stepped in w people getting hurt and well you know the rest.
RIP 6 cell pan car modified
You're wrong, so wrong....
I still run my 10th pan car every week.
At least 5 larger races a year and 5 club races.
On smaller tracks these things are a little fast, but hey, what's the fun in being slow? On a tight track running stock you still easily outrun anything 4wd.
Just read up on this thread:http://www.rctech.net/forum/showthre...82#post1411782
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Old 02-26-2005, 08:58 AM   #11376
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Default Re: Re: Question:

Quote:
Originally posted by brianhackett
I believe it was tried before and the Idea just never took off. 12th scalers love their foams.
Foam gives way more grip, and wears less, or at least stays usuable longer. Just watch out for "chunking", and keep your tires stored free from air. Something like zip-lock bags works great for that. For indoor, you want your foams to be a bit dry. Outdoors they must be fresh.

On the question about corally tires:
Corally has its own wheeldesign which isn't interchangable with the regular "USA" design. You could mount your own tires on those rims though, if you have your own truer.
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Old 02-26-2005, 09:09 AM   #11377
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could you just swap the axles on a corrally with AE stuff and run regular wheels?
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Old 02-26-2005, 09:20 AM   #11378
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- pro ten holland:
Maybe he was talking about 1/12th 6cells mod pan cars...

I use corally tires and wheels, since I drive A 12M.
I always buy foams already mounted on the rim,
But why do you need A truer if you want to mount tires on the rim?

- primusblowsgoat:
The rear axle doesn't have to be A problem, I thought the diameters are the same. And if they aren't you can buy some different size bearings.
But the front end is A bit different.
With "normal" 1/12th scales the bearings are mounted inside the wheel, with Corally's 12th the bearings are in the steering hub.
This makes the steering larger and doesn't fit on a AE style front end.
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Last edited by Tekin; 02-26-2005 at 09:28 AM.
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Old 02-26-2005, 09:23 AM   #11379
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Picture of the Corally 12m front suspension (sideview):
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File Type: jpg sp12mtrainavant8[1].jpg (27.9 KB, 137 views)
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Old 02-26-2005, 09:24 AM   #11380
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Picture of the Corally 12m front suspension (view from above):
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File Type: jpg sp12mtrainavant6[1].jpg (36.5 KB, 142 views)
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Old 02-26-2005, 11:39 AM   #11381
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Default IRS

I just got a set of the IRS rear pod ride height adjusters yesterday and installed them on my 12L4. They allow for finer changes to the rear ride height and insert into the side plates so much more easily than the stock plastic ones. Sweet!
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Old 02-26-2005, 11:53 AM   #11382
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Quote:
Originally posted by Tekin
- pro ten holland:
But the front end is A bit different.
With "normal" 1/12th scales the bearings are mounted inside the wheel, with Corally's 12th the bearings are in the steering hub.
This makes the steering larger and doesn't fit on a AE style front end.

Well Corally used to make a US-style/version Formula 1 and pro10.

The front axles on those cars could be fitted into the 1/12.
It makes a thick front axle with an imperial size diameter, so US front wheels should fit.
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Old 02-26-2005, 12:06 PM   #11383
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Default Kudos to Irrgang Racing Services

Last Sunday, I ordered a few hop-up parts from Irrgang Racing Services (IRS) over the internet. On Monday, I got a confirmation that they were shipped. On Thursday, they arrived and were gleefully installed in my 124 for the Friday night at Gilroy.

Many, many thanks IRS.

In mid-December, I placed two separate orders for similar parts to a manufacturing "competitor" of IRS. They still haven't arrived after numerous inquires on my part and excuses on their part.
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Old 02-26-2005, 12:06 PM   #11384
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The Pro-10(C10-X) and F-1 cars that Corally makes at the moment only exepts corally style rims.
Don't know about the older version, thought they also were only made for corally's rims.
If not, than I guess those older hubs aren't available anymore.

But is there someone who knows if you can change A AE style 12th car/front, rear suspension so it exepts corally rims?
Over here (the Netherlands) I can only buy Corally rims and tires, because there aren't AE style rims available.
Which I don't really like, 'cause I also like to try some other 12th scales than Corally's
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Last edited by Tekin; 02-26-2005 at 12:12 PM.
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Old 02-26-2005, 12:29 PM   #11385
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(1) You want to fit on a US 12th scale car Corally rims?

Or

(2) You want to fit US wheels on a Corally car?


Option 1 or 2?

I'm getting .
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