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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 10-08-2007, 05:53 PM   #27121
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Anyone have any experience with the Parma Pro 38s?
Grey or Magenta rears? and purple orMagenta fronts?
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Old 10-08-2007, 05:56 PM   #27122
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Quote:
Originally Posted by EricF View Post
John_S-
The ticket may be to not use the grey rears. I personally don't run those anymore it always (at my track) seemed that if I got out of the groove it'd take almost a lap to get the tires cleaned up and have traction again. When I switched to dbl pinks at all 4 corners or dbl pink front and pink rears even the car remained consistent and if I got off line I didn't struggle for almost a lap.
E
All the tracks in my area are limited to Jack the Gripper. From what is being said, it sounds like the 2xPink Front and Pink Rear will allow the car to remain consistant the whole run versus Purple Front and Gray Rear. Besides this difference, how different will a car run when changing to this tire combo assuming everything else is the same? I'm mainly referring to the first few minutes when a Purple / Gray combo is working properly.

Thanks,
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Old 10-08-2007, 07:42 PM   #27123
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Tom, are you going to be in attendance tues. or this saturday?
I heard Big Dads had a good turnout of 12ths........

All those boxes of foam need track time!

Mark
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Old 10-08-2007, 07:57 PM   #27124
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Quote:
Originally Posted by jt6 View Post
Anyone have any experience with the Parma Pro 38s?
Grey or Magenta rears? and purple orMagenta fronts?
Pro 38's are great tires. I was running Magenta/Magenta on the local track but once the bite came up a little Grey rears were .2 faster. I ran Grey rears and Purple fronts at the IIC while some of my team guys ran Grey rears with Magenta fronts. I have had no trouble with losing traction late in the race.

The problem with Purples getting gummy and causing late race oversteer comes when the car doesn't rotate well enough and the front tires are scrubbing the track too much which heats them up
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Old 10-08-2007, 08:35 PM   #27125
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Anyone tried black fronts. They seamed to not gum up like the purples.
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Old 10-08-2007, 09:05 PM   #27126
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Quote:
Originally Posted by Grenade10 View Post
Anyone tried black fronts. They seamed to not gum up like the purples.
black fronts are real good on high bite. They are the same shore rating as a purple but with less natural rubber in them. They dont build up traction like a purple will. They stay consistant. Purples will be better for low and medium bite. I really like the Jaco Lilac tire also for low and medium bite tracks. I change to black when the bite comes up
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Old 10-08-2007, 10:11 PM   #27127
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Originally Posted by protc3 View Post
black fronts are real good on high bite. They are the same shore rating as a purple but with less natural rubber in them. They dont build up traction likea purple will. They stay consistant. Purples will be better for low and medium bite. I really like the Jaco Lilac tire also for low and medium bite tracks. I change to black when the bite comes up
Hey Jason
My understand you perfer to run the Lilac on low and med bite ,but what are your rear tire ? Do you perfer rear Yellow over Megenta most condition and why? Thanks
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Old 10-09-2007, 12:06 AM   #27128
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Quote:
Originally Posted by protc3 View Post
black fronts are real good on high bite. They are the same shore rating as a purple but with less natural rubber in them. They dont build up traction like a purple will. They stay consistant. Purples will be better for low and medium bite. I really like the Jaco Lilac tire also for low and medium bite tracks. I change to black when the bite comes up
Grey and Black is my favorite combo for high bite. Unfortunately we do not have Blacks available (yet) in Pro 38. The bite at the IIC was high and the tires of choice (in stock) were Parma Pro 38 Grey/Magenta or Jaco Yellow/Lilac. We had to run our Magentas very small with a little sidewall glue, and the cars were dialed. If we had blacks available they I think they would have been useful
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Old 10-09-2007, 04:19 AM   #27129
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Quote:
Originally Posted by Goingfast View Post
Hey Jason
My understand you perfer to run the Lilac on low and med bite ,but what are your rear tire ? Do you perfer rear Yellow over Megenta most condition and why? Thanks

For stock i like to run yellows with the lilacs in medium bite. In mod and 19 i like the 2x pink front and rear. The yellows seem to keep the rear free and let the car rotate and keep the corner speed up. The Lilac reacts more like a 2x pink as they are consistant through the run but they arent as aggressive as a 2x pink.The blacks free the front up in high bite and they dont drill the nose. I still use yellows in high bite.
In mod and 19 i like 2x pink front and rear. They seem to work well and stay consistant.
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Old 10-09-2007, 04:21 AM   #27130
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Quote:
Originally Posted by odpurple View Post
Grey and Black is my favorite combo for high bite. Unfortunately we do not have Blacks available (yet) in Pro 38. The bite at the IIC was high and the tires of choice (in stock) were Parma Pro 38 Grey/Magenta or Jaco Yellow/Lilac. We had to run our Magentas very small with a little sidewall glue, and the cars were dialed. If we had blacks available they I think they would have been useful
Yeah, I heard blacks were MIA at the IIC. I dont think anyone expexted the bit to be that high It seems everyone got there cars working good. What you did makes sense.
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Old 10-09-2007, 06:47 AM   #27131
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just read that Serpent were testing a new 12th chassis of thiers at the IIC.
PetitRC have a pic, but its clearly a CRC GenX.
http://www.petitrc.com/_forumphp/sho...823#post255823
Theres a few words on it in Serpent news too:
http://www.serpent.com/news/12366/II...inals-Day.html
So any one have pics?

Last edited by jbsmith1; 10-09-2007 at 07:02 AM. Reason: missed info
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Old 10-09-2007, 07:52 AM   #27132
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Jeff Cuffs stated on the serpent 1/12th thread that there was no serpent 1/12th at vegas
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Old 10-09-2007, 08:24 AM   #27133
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oh didn`t know about the Serpent 12th thread, still what a shame, was looking forward to that. Thanks anyway.
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Old 10-09-2007, 12:22 PM   #27134
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HI, i am hopingyou can help me with a tire combo for an upcoming race this weekend. I will be using the jaco prsim tires as parma are hard to get up here and I have always had very good luck with the jaco's.

The track layout is identical to IIC, but the carpet is medium bite. I will be running 19t in a L4.

Would double pink front and rear be the best combo, or should i try lilac and yellow?

I am looking fo the safest setup, for instance in touring i know i will be running double pink, double pink/orange as I know it is safe.

Any help is appriciated.

thanks!
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Old 10-09-2007, 12:41 PM   #27135
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Hello There, 6g72tt I used to run a L4 try this setup:


Fronts Jaco Prizim Lilac's
1 degree camber
.020 front spring

Center Spring/shock run The Olive spring to start out with as the bite comes up got to the silver use 30w oil

Dampner disk's use the diff lube that came with the car Associated Siliocone grease #6636

T-plate run the .075 t-plate

Rear Jaco prizim Yellow's
Not sure what motor your running If your running thr 19t Komodo try a 96/32 or 33 with green springs and a F-brush

hope this help's
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