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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 05-02-2007, 04:00 PM   #25321
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Quote:
Originally Posted by jdcarbon
I'm not racing or trying to break the speed of sound, I'm just playing around. =) So I suppose 11.1 may be too much. I had a chat with the support guys at Castle and they even suggested a Mamba 25 system at 7.4v. Only problem is mounting it.

Is anyone making after-market 1/18th scale motor mounts for the RC12L's? Or am I stuck with my friend Mr. Dremel?

Tnx
Above you said you might want to use the brushless in a 1/10 or 1/8th later, so why go with the Mamba 25? If it's a money issue you may want to look at going with a brushed system till you can afford a 1/10 size brushless.
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Old 05-02-2007, 04:01 PM   #25322
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Quote:
Originally Posted by David Galdo
That is a great design Jason!

One feature about the FF07 I like is the tweak screw setting is the same each time the t-plate is replaced. As everyone knows, the 'old style' t-plate requires the removal of the tweak screws and they never go kcab on the same way. I use the 'old style' t-plate but only place the pivots on it. The FF07 Independent Tweak System maintains your setting. Naturally, I check tweak each time with the tweak station but each time it has been spot on.

The use of 'old style' was for you Jason.... Your new ride is trick.

thanks bro.that is a pretty cool setup for tweak screws.
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Old 05-02-2007, 05:18 PM   #25323
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hey david,how do you like the lowered T bar feel on asphalt over the standard?
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Old 05-02-2007, 06:43 PM   #25324
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I will have to let you know later.... I have not had the chance to run on asphalt. I will plan on next weekend taking a trip to SA for asphalt. I wish we had asphalt here...
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Old 05-02-2007, 06:54 PM   #25325
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yeah,racing has been pretty dry here.i got my car all ready to go and it wound up raining.since then there hasnt been anything going on.hopefully soon.its been about 3 or 4 weeks now.im hurtin over here. as soon as i get my car working the way i want it to the racing slows down she looks fast in my garage at least.
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Old 05-02-2007, 06:57 PM   #25326
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Dumas won't let me see (sell) my car.... I have not seen it for a few weeks now. I will snag his keys this Friday and practice.
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Old 05-02-2007, 07:01 PM   #25327
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Quote:
Originally Posted by protc3
hey david,how do you like the lowered T bar feel on asphalt over the standard?
Jason the lowered T bar give the car a lot of side bite on asphalt ask P2 and Carlos how well it hooks up outdoors. Before the sun went down I was trying everthing to get the rear end to free up only thing I could do is rase the balls in the tplate to get to free up then when sun foes down and track gets lose I take the shims and go.

Tim
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Old 05-02-2007, 07:02 PM   #25328
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dont sell the stuff off.6 months from now you will wind up wanting to run again and you will need to buy the stuff all over again
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Old 05-02-2007, 07:05 PM   #25329
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Yeah... I know.
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Old 05-02-2007, 07:15 PM   #25330
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Quote:
Originally Posted by tpczx6
Jason the lowered T bar give the car a lot of side bite on asphalt ask P2 and Carlos how well it hooks up outdoors. Before the sun went down I was trying everthing to get the rear end to free up only thing I could do is rase the balls in the tplate to get to free up then when sun foes down and track gets lose I take the shims and go.

Tim
yeah,thats the same as it did for me.when i was doing my testing on the new car,i started with extremely low pivot balls to start.i made the pivot about .75mm lower than the standard AE height.the car pushed like a dog.i raised them little by little until i reached the height that gave me a good balance to where i can manipulate the handling through standard setup and side spring tension.i wound up just slightly lower than my T bar car.this new rear end did take a different geometry than my T bar car to make it work.i was getting frustrated with the first prototype.once i got it,i made new pivot balls to the new height and was releaved to see the results.it is amazing how the actual results dont match up like they do on paper.these little cars are pretty amazing.now that i have had time on both carpet and asphalt with the car,i have been able to really find the sweet spots and make the car more user freindly.man,im blabbering on.
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Old 05-02-2007, 07:18 PM   #25331
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Quote:
Originally Posted by David Galdo
Dumas won't let me see (sell) my car.... I have not seen it for a few weeks now. I will snag his keys this Friday and practice.
Smart man that Dumas is. You could of at least give me one more week to practice. It has been raining here as well on and off. I haven't finished putting the car back together yet.
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Old 05-02-2007, 07:22 PM   #25332
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Quote:
Originally Posted by tpczx6
Jason the lowered T bar give the car a lot of side bite on asphalt ask P2 and Carlos how well it hooks up outdoors. Before the sun went down I was trying everthing to get the rear end to free up only thing I could do is rase the balls in the tplate to get to free up then when sun foes down and track gets lose I take the shims and go.

Tim
I know when I ran the Hyperform the rear was planted the way I wanted with a little push, but I can handle the push it had. I also then figured out away to get rid of the push. When the sun goes down that track gets to the point you can almost drift with the car.
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Old 05-02-2007, 07:23 PM   #25333
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damn,i think im gonna start renting my car out just so it gets to run. it eats me alive because it has been completly gone over from the prior testing and now it sits.it perfect and i cant race.
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Old 05-02-2007, 08:51 PM   #25334
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Hmmm...lowering the pivots...I imagine I could lower mine some to try and gain rear traction but I think the links will hit the chassis too early. Something to look into though.
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Old 05-02-2007, 09:31 PM   #25335
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the tweak plate shown in the picure for the ffo7 works awesome. you can change steering and rear grip by usin the different hole. like changing to different thickness of t bars with out changing them.
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