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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 10-23-2003, 07:49 AM   #4531
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I have some questions. New to 1/12th but not new to RC. I just picked up a CRC Bloody Knife. I'm still reading through this thread to help catch up but it's a long thread.
[list=1][*]What is the handling differences between the Protoform Ascari and Parma Speed 8 bodies? Which is the recommended body for a short twisty track? Is there any other bodies that are considered better?[*]What is the starting tire diameter for racing for front and rear? And if my car is setup correctly how many weekends of racing should I expect to recieve from my tires.[*]What other front and rear tire compounds is good to have on hand (besides purples and grays) when racing stock on carpet?[*]When setting rear droop what is the easies way to measure it?[*]Is there any fluids besides Losi Hydra drive and/or 100wt shock oil that is commonly used in the dampening tubes?[*]What ride height do most people run their chassis at? I'm guessing 3mm since that is the ROAR min ride height rule.[*]Is the setups listed on CRC's website a good place to start?[/list=1]

Thanks!
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Old 10-23-2003, 09:14 AM   #4532
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I can help with the droop. Adjust your SHOCK LENGTH so it allows the rear of the pod .5 to 1mm lower than the front of the pod or main chasis. Next set your spring preload so it Just settles into its suspension. This will leave your pod and chasis level or a teeny bit lower in the center. The only thing to change from there are spring and shock oil. Changing one spring rate will make a huge difference. Try different ones out and see. I

I suggest getting both side and center spring kits from CRC. I only use white or red side springss. But change center springs for different tracks or conditions.

Yes, The CRC steup from the site is almost the same as mine.

I just run camber so the tires wear even.

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Old 10-23-2003, 10:14 AM   #4533
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Default Integy Tire truer

I had one and I am getting it back soon.... I don't car what anybody says this piece of equiptment is a BEAST!!! the motor is huge and has tons of torque!! When I got it I decided to see just what it had...... Took it out to my truck and connected it to the battery, (didn't wanna strain my P/S) and proceeded to cut a pair of CRC X-hard foams (50ish shore, hard as a brick!!) only I decided to take like 6-8mm off at a time... it barely bogged down and ripped right thru .......

The only downfall I see is that you need to do a little more manicuring with sandpaper, and there is no automatic feature like you can get with a huddy or Ofna.... but they both use little wiompy motors!!! Besides I am a control freak and would never let a machine take control over my equiptment.....
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Old 10-23-2003, 12:16 PM   #4534
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Default Quad12 Set-up

Finally got all the parts to finish my Quad12. Looking for a good starting set-up for stock carpet. I'm running the dynamic front end, TRC purple/grey, Protoform Ascari and a Monster.

Any help is appreciated.

Thanks
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Old 10-23-2003, 01:16 PM   #4535
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Quote:
Originally posted by Jared Kirkwood
[*]What is the handling differences between the Protoform Ascari and Parma Speed 8 bodies? I started out using the Speed 8 and tried the Ascari and like it better seems to give more downforce than the speed 8, most people probably run the Speed 8 since it's been around so long. I'd be interested to hear what others think on this also....
[*]What other front and rear tire compounds is good to have on hand (besides purples and grays) when racing stock on carpet?
A pair of white rear's might be nice to try out. only used purples on the front seem to be the best, but don't forget your traction compound.1/4th to 1/2 of the front's only.
[*]Is there any fluids besides Losi Hydra drive and/or 100wt shock oil that is commonly used in the dampening tubes?
Start with OFNA 7000 wt oil it's thicker than the 100wt shock oil, but the 10,000 might be too much. the 7000 is similar to Losi Light Hydra Fluid.

https://www.ssl-stormerhobbies.com/c...pl?pn=OFN10234
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Old 10-23-2003, 02:17 PM   #4536
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bobby z a good set up for a c2 19t for 12 scale is either e brushes or 767 for xtra ripp in some cases i have used 2 purples on tight tracks and purple on the pos post and green on the neg post for medium and bigger sized tracks.
i break in motors dry at 2 vlts your motors should be pulling around 8 to 12 amps
just learn to be smooth on the trottle you have plenty of power.
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Old 10-23-2003, 02:23 PM   #4537
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stumper1 i run for doug here is a good starting point for your quad 12

frnt springs .020
small drop of silicone to kingpin (very little)
10 deg caster blocks with split on the washers one frnt one rear !
1 deg toe out small spacer under suspension 3.5 ride hieght
1.75 front tire purple (trc)
silver center spring
35 wieght oil
trinity thick stuff for dampening dont know viscosity its thick old school stuff
3.5 mm ride hieght rear with
grey tires for carpet at 185 size
on asphalt 3 mm hieght and pink compound.
with a parma speed 8 body
for xtra down force asari.
hope this gets you in the winners circle
good luck.
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Old 10-23-2003, 02:29 PM   #4538
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speedxl-

Thanks!! I should have a chance to get in some practice with it this weekend! I'll let you know how it works.
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Old 10-23-2003, 02:34 PM   #4539
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stumper if you dont have a traction rool problem try .018 springs with a 170 tire that ill give some serieous steering
by the way i forgot to list a .073 0r 074 tplate for the car on carpet and a .063 for asphalt .
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Old 10-23-2003, 04:24 PM   #4540
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Default Besides size difference 1/10 and 1/12

I am a little confused about 1/12 size cars.

1. Are 1/12 just slightly smaller versions of 1/10?

2. When I look at the RC Magazines and RC catalogs, I see almost entierly 1/10 cars with small asortment of 1/8 off road and minis. There does not seem to me to be very many 1/12 size cars or many 1/12 discussion or articles.

but
3. when I look at Race Results I always see 1/12 class listed.

It seems like a popular class to race but see very few cars or acesories for sale.
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Old 10-23-2003, 04:44 PM   #4541
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imjonah you have look around in this forum you find a lot of web sites listed
there are as many if not more companies making 12 scale then sedan all the major players in touring car stared in 12 scale and actually still produce and sell them for a while they faded away and now they have made a strong return world wide, and growing .
i race for a company called prc which makes conversion kits for the associated 12L3 which is still made, trinity makes a car aswell as irs rug rat , speed merchant, crc arpet knive, yokomo, reimen, kawada, spoon , corally , hpi, and various other companies they all make aftermarket parts for them everything and anything is availabel. look through all the previos posts here and you will find alot of stuff.
the reason these cars look like 10 scale pancars is because 10 scale cars where built after the 12 scale and they made them bigger for out door racing 12 scale was here first and started around 1970 something and then around 1987 they made the bigger versions which is what a 10 scale pancar is.
try 12thscale .com they have a few links and sponsors that will show the 12 scale world.
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Old 10-23-2003, 04:50 PM   #4542
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Anybody remember the Parma EuroPanther? I still have mine. LOL, talk about vintage racing...
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Old 10-23-2003, 04:51 PM   #4543
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shoot i still own my delta super phasors and p-12 spyders and a 12i talk about old sckool!
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Old 10-23-2003, 06:04 PM   #4544
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Default Re: Besides size difference 1/10 and 1/12

Quote:
Originally posted by imjonah
I am a little confused about 1/12 size cars.

1. Are 1/12 just slightly smaller versions of 1/10?

2. When I look at the RC Magazines and RC catalogs, I see almost entierly 1/10 cars with small asortment of 1/8 off road and minis. There does not seem to me to be very many 1/12 size cars or many 1/12 discussion or articles.

but
3. when I look at Race Results I always see 1/12 class listed.

It seems like a popular class to race but see very few cars or acesories for sale.
imjonah,
Where are you located? If you are in the metro Denver area, check out Hobbytown in Westminster. There is 1/12 scale racing on Wednesdays and Sundays. You can look at the 1/12 scale cars in person. You'll love it.

D.P.
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Old 10-23-2003, 06:09 PM   #4545
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Default Best Thing I heard

I was at CRC in Rome NY practicing with my Carpet Knife. They said to me "If you can drive a 1/12, you can drive anything". I am still trying to master 1/12. Getting the hang of it and loving every minute of it.

I race off road gas and electric. Racing 1/12 has helped my off road driving a lot.

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