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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 01-19-2012, 12:25 PM   #37576
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Quote:
Originally Posted by JamesL_71 View Post
Bumping this so it doesn't get lost in the shuffle...
Simichrome Polish, made by Happich.

Polish everything that isn't coated
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Old 01-19-2012, 12:48 PM   #37577
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Originally Posted by odpurple View Post
Simichrome Polish, made by Happich.

Polish everything that isn't coated
So ixnay on the link balls... Thanks
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Old 01-19-2012, 01:18 PM   #37578
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Originally Posted by Jim Frahm View Post
No one that I normally order from had one in stock. I will pick one up when I find one.
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Old 01-19-2012, 02:03 PM   #37579
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Stormer just listed a bunch of new compounds for the Enneti tires. Anybody know anything about these?
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Old 01-19-2012, 07:13 PM   #37580
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LonnyJ1950

They are the tire to run in 8th scale on road...
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Old 01-19-2012, 08:05 PM   #37581
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Originally Posted by LonnyJ1950 View Post
Stormer just listed a bunch of new compounds for the Enneti tires. Anybody know anything about these?
Dont do it, i regret getting them.
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Old 01-19-2012, 08:12 PM   #37582
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Well, I like the ones I've tried, the new exotic rubber, orange, yellow, etc. And I like the older fronts Xceed has been marketing, but those rears don't quite hook up on our rug, so I was wondering about the kind of foam the newer compounds were.
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Old 01-19-2012, 08:15 PM   #37583
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Anybody tried the tire offerings from Contact RC??
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Old 01-19-2012, 08:22 PM   #37584
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Lonny, Have you tried the new G12 tires? They come in 2 compounds Soft & Med (close to pink and magenta) but they seem to be of a different rubber altogether. Nexus should have some in stock.
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Old 01-19-2012, 08:26 PM   #37585
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Originally Posted by Arahawak View Post
Anybody tried the tire offerings from Contact RC??
Haven't tried them myself but saw a rear shatter to pieces last weekend. The rear wheel seems to be VERY stiff and thus brittle. Fronts look really good though.
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Old 01-19-2012, 08:59 PM   #37586
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Also to top on ehat wes has said u also want to make sure ur tires are completely dry i mean completely! dint put on the track and leave marks it makes it very inconsistant in the begin and takes longer to get up to temp...Use the blue or white heavy paper towels when whiping not a "tire rag" rason being u dont wan to contaminat ur foam before even putting on the track with different compounds or place down ur car on the section of track were its dirty, try putting it down in the groove...
If u have notice alot of the pros or big name racer will normaly have a help who put there car down for them the will whipe the tires off set them down in the groove they check there turning radius or do a couple quick tns to get the cars feel then the helper will scrub them in.. and set them down in the startin spot and "set the suspensions for the start for max forward bite... Rememeber tires are 90% of the setup and makes all the diff in the world from being on pace to being that .2-.3 lower a lap just because proper maintence is done





Quote:
Originally Posted by Wes Briscoe View Post
What tires are you running front/rear, and what tires is everyone else running? That's a good starting point, figuring out if you are running the right tire in the first place and adjusting from there.

Tire care changes from track to track, sometimes. At our club we just defuzz the tire. If you stay in the driving line though the tires come off very clean. Most of us also set up our cars so we run full dope across the front.

As far as ride height, I always set my car up square. 3.7mm across the deck, and I start an evening there. By the end of the night I usually am around 3.5mm rear and 3.3mm in the front. I don't bother adjusting during the night unless my rear/front bias grows greater than .2mm. You can experiment with chassis sag, but typically for me I always run 1-2mm of uptravel and no chassis sag.

The length of time you sauce, and track temperature play important roles in consistency. If the track is getting colder as you progress through a race day it may be losing grip, you may need to sauce longer or run a softer tire. On the other hand if it is getting warmer and grip is coming up you may sauce less. I generally try to sauce for 15 minutes and adjust from there. If the car feels loose late in the run I will go to 20 minutes, if it is too edgy in the beginning but feels fine late, I will sauce for 10. For me I've found its important to sauce the same time every time however. Just slapping it on and calling it good introduces inconsistency.

The easiest thing to do is see who's clearly faster consistently and ask them what they are doing. It will get you on pace faster than speculating on the forums since none of us run that track.

If you are new enough to this and don't know what to ask figure out this;

- Tire Compound.
- Tire Sauce, applicatino length, and amount across front/rear.
- Tire Diameter and sidewall radius amount.
- CA on the side wall, if so, how far.
- Ride height.

Other things to consider that effect consistent handling;

- Diff smoothness and tightness. Ask to spin their diff, if it's clearly smoother than yours you have to fix it.
- Dampening rates and springs. Are you running a similar setup?

Good luck!
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Old 01-19-2012, 09:05 PM   #37587
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I ran the fastest laps anybody had run on my tracks current layout with Enneti Black front tires. I'm not sure about rears, but that front works well enough.
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Old 01-21-2012, 12:24 AM   #37588
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A tip for all 1s racers who like to run boosted spec motor; if you can find an original Trinity Duo new or in good shape, buy it. My Duo 13.5 took all the boost my Stock Spec V2 could give it, ran scary lap times, and stayed cold. Its like magic. If I tried to do that with my X12 it would burst into flames or something.
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Old 01-21-2012, 06:52 AM   #37589
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My Duo3 does the same too.
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Old 01-21-2012, 07:05 PM   #37590
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Originally Posted by burgboyz View Post
Lonny, Have you tried the new G12 tires? They come in 2 compounds Soft & Med (close to pink and magenta) but they seem to be of a different rubber altogether. Nexus should have some in stock.
Haven't tried them, but our rug isn't quite up to pinks yet, at least not for me. The Contact soft Pink is just a little loose. That said sooner or later I try them all so I'll get around to the G-12s sometime.
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