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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 06-12-2009, 05:19 PM   #31591
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Quote:
Originally Posted by Casper View Post
yes carpet. Sorry about the typo on the spring.
Your Setup seems a little off for the Gen-X with a 13.5 and 1s LiPo.

Ride Height All = 3.5mm
Race Ready Droop = 3.5mm
Front Springs = .45mm (.018")
Damper Tubes = CRC White Cap Lube, Red if track is bumpy or loose
Caster = 10-deg
Shock Spring = Blue (10lb) or Gold (12lb)
Shock Oil = 35w
Side Spring = White or Blue
Front Tire = Double Pink (Jaco or Parma)
Rear Tire = Yellow
Tire Stagger = Rear +2mm more than Front
Rear Width = 172mm
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Old 06-12-2009, 05:23 PM   #31592
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What is tire stagger?

I really want to go to a stiff center spring and they are on the way. My buddy has some spares so I might bum one off him for now.

thanks for the tips. I will give it a try.

I need to lower my ride hieght as well! LOL

(track minimum is 4)
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Old 06-12-2009, 05:40 PM   #31593
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Quote:
Originally Posted by Casper View Post
What is tire stagger?

I really want to go to a stiff center spring and they are on the way. My buddy has some spares so I might bum one off him for now.

thanks for the tips. I will give it a try.

I need to lower my ride hieght as well! LOL

(track minimum is 4)
Stagger is the difference in tire height from Front to Rear. If the Rear tire height is 44mm, than the Front should be 42mm.

With the 1s LiPo, you won't need a stiffer center spring than Gold (12lb). We ran Red (14lb) with NiMH 4-cells, and with the reduced weight, a lighter spring is needed to get the chassis to work.

If the track minimum is 4mm, then set it to the minimum. Most carpet tracks are fairly smooth, which allows the lower ride height to work better, but if its bumpy, a little higher will help traction.
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Old 06-12-2009, 08:56 PM   #31594
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Hi Conrad, that's a car that I made up myself and I made two versions of the crossbrace and upper pod plate, one uses twin damper tubes whilst the other setup uses one damper tube.





I have seen twin shocks on 12th cars before but I think due to the weight of them, they are not that popular to use. I have also seen small springs on the end of damper tubes and you are quite correct, turn the ball cups one way or the other and it adds or removes preload from them, so you can indeed set the tweak using this method.

Cheers, Chris.
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Old 06-12-2009, 09:13 PM   #31595
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Love the herringbone weave graphite. I wish more people would use it.
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Old 06-13-2009, 04:06 AM   #31596
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Quote:
Originally Posted by wingman2 View Post
Hi Conrad, that's a car that I made up myself and I made two versions of the crossbrace and upper pod plate, one uses twin damper tubes whilst the other setup uses one damper tube.
Ah that would explain it, i couldnt figure out what it was, using the corally body posts really through me as i'd never seen them with a rear pod like that, lol. Really nice work btw. So how did you find the car 1 tube v 2 tube?

I was looking to do a similar conversion to my sp12m, remove both dampers tubes make up a top plate like yours and use the side shock from a RC12R5, purely from a maintenance point of view Weight was the only reason i could think of as well why people wouldnt use microshock instead of tubes.
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Old 06-13-2009, 10:07 AM   #31597
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Default Looking to get into 12 scale

I found a deal on an sp12x by corally. Could someone give a brief description of the pros and cons of this car.
I saw on Stormer hobby site that it use corally wheels. does this mean that you can't use an other brand of wheels?
Thanks
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Old 06-13-2009, 12:49 PM   #31598
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Hi everyone !

Very happy because i bought a XRAY XII

But what wheels must i buy please ? Brand, shore ?

I am planning to put a 10,5 brushless motor in it, what pinion and spur must i use please ? brand ?

Thanks everyone

Greetz,

Christoph
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Old 06-13-2009, 05:30 PM   #31599
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Quote:
Originally Posted by CivicTuning View Post
But what wheels must i buy please ? Brand, shore ?

I am planning to put a 10,5 brushless motor in it, what pinion and spur must i use please ? brand ?
Where do you plan to run it? Asphalt or carpet, indoor or outdoor. My best guess is indoor-carpet but who knows.
You can't go wrong with some Jaco. The best thing is to ask others racers on your local track, they might get the right setup. Try Dbl Pink front, Grey rear, you may find a chart on the web to get the full range of available shore.

For spur and pinion, Kimbrough, Robinson, PRS get great stuff. I do use robinson for both as that was available at the LHS.
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Old 06-13-2009, 06:03 PM   #31600
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I have tried both single and twin damper plates and have found it easier overall to use the twin dampers. With just the one, you have to use really, really thick stuff in it to get the same effect as the twin setup ( and I mean really thick!). I will get one of the side shocks from the AE car also to try and hopefully that'll be easier. Fibre Lyte in the UK cut out the chassis and parts for me and they have a number of differant types of carbon. I just like the look of the cross weave stuff so that's what I got them to use. Cheers pal, Chris.
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Old 06-14-2009, 06:08 AM   #31601
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Quote:
Originally Posted by wingman2 View Post
Hi Conrad, that's a car that I made up myself and I made two versions of the crossbrace and upper pod plate, one uses twin damper tubes whilst the other setup uses one damper tube.





I have seen twin shocks on 12th cars before but I think due to the weight of them, they are not that popular to use. I have also seen small springs on the end of damper tubes and you are quite correct, turn the ball cups one way or the other and it adds or removes preload from them, so you can indeed set the tweak using this method.

Cheers, Chris.
Wingman2,
On the top photo you have the rear body mounts as far back as possible to the rear wheel, this is an idea I have thought of aswell and would of thought that most manufacturers would have adopted by now.
Rear mounts located further back generated more down force to the rear axle, rather than the mounts located inline to the pivot point of the rear pod causing pod sag at speed.
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Old 06-14-2009, 06:08 AM   #31602
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Quote:
Originally Posted by Arn0 View Post
Where do you plan to run it? Asphalt or carpet, indoor or outdoor. My best guess is indoor-carpet but who knows.
You can't go wrong with some Jaco. The best thing is to ask others racers on your local track, they might get the right setup. Try Dbl Pink front, Grey rear, you may find a chart on the web to get the full range of available shore.

For spur and pinion, Kimbrough, Robinson, PRS get great stuff. I do use robinson for both as that was available at the LHS.
Thanks for the info Arn !

i plan to race indoor on carpet.

Greetz,

Chritoph
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Old 06-14-2009, 07:51 AM   #31603
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Hi mate, I did indeed put the rear bodyposts further back for that very reason. It may not look like it, but the bodypost postition is actually exactly the same for both single, and twin damper setups. I have a couple of other ideas that I am working on, hopefully they'll be sorted sometime soon. Cheers pal.
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Old 06-14-2009, 10:19 AM   #31604
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Default tires tires tired!

hey guys need sme advise on parma tires ,i can't find info on there tires as far as what works on carpet,what works on asphalt .in stock and 19t. jaco give you some info on each color so you can make a choice. parma ?
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Old 06-14-2009, 11:48 AM   #31605
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Wow, you guys are great and full of info. I need some advice! I am going from 1/8th and 1/10th on-road nitro to 1/12th scale carpet indoor. I am looking to purchase a car, brushless motor, etc. Can you give me your opinions on cars +/- as well as brushless systems? Any help and your opinions will be appreciated. A few of my friends are going to be joining me, so I am asking this question for about 4 people. We probably want to get the same car so that we can share parts, etc. THanks Guys!
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