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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 12-05-2002, 11:51 AM   #1996
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I am visiting Albuquerque, NM on business. I went by the Albuquerque Hobbies yesterday evening and was talking with the shop owner. I says the Trinity factory told him the Switchblade is discontinued and they are not filling any orders. Someone should check that out. I heard the same thing from a New Jersey Trinity driver in Cleveland.
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Old 12-05-2002, 11:56 AM   #1997
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I've been wanting to ask this question to switchblade owners for quite some time....

Is it difficult to adjust the front end? Considering all adjustment are thru turnbuckles. Does caster and camber all changed at the same time when you adjust one of the turnbuckles? I personally have not seen this car in person, but I'm interested as the ease of adjustments. Thanks!
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Old 12-05-2002, 12:16 PM   #1998
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Tres- i think the new carpet is called Ozite II and there do appear to be some differences in construction but i'm not the expert on it. A friend examined a piece at Cleveland and noted that there appears to be a very thin rubberized middle layer that the top fibers are woven to and then there is the normal glue backing after that. i haven't looked at it but others who have gotten the carpet for their track said similar things, who knows? Anybody else that went to Cleveland notice any different properties from the original Ozite?
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Old 12-05-2002, 12:56 PM   #1999
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Newracer
I have not seen the New CRC wheels. I had Justin order some though. They are supposed to be shipping this week.
My Switchblade has a shouldered axle also, and does not have a problem with TRC's wheels.

I went down Monday for the first time . I set up my Carpet Knife. By the end of my sessions was within 2-3 tenths of the winning driver in the A main stock class. I was running a old P2K without any maintainace on the motor. I think with a fresh cut and brushes I might have picked up those extra 10ths.
Plus I have not driven a 12th scale for 8yrs.
Next week I am bring out my Switchblade. I'm very curious how it stacks up to the Knife.

Dan, Terry (American Racing Models) Tom and I are planning to run Sunday. Dan ran last sunday for the first time. He had problems with his qualifiers, but his time in the main would have been 3rd in the A.

See you down ther Mike
Dave
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Old 12-05-2002, 01:12 PM   #2000
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Newracer
Mike,

$6 to practice.
Also, When we were there Monday, Tim turned on the AMB system so we were able to time our laps. That was really great.

We also picked up the new personel transponers, and they work fine.

Dave
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Old 12-05-2002, 01:17 PM   #2001
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Quote:
Originally posted by newracer
that shoulder is what I was worried about, I wonder how it will work with other wheels, specifically CRC's.

Dave are you racing this weekend? Have you been down to practice yet? What's the cost for practice? I am going to race this weekend for the first time.

Mike practice is $6 and racing on the weekends is $12. Im not sure the cost to race Wednesday nights though.
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Old 12-05-2002, 01:19 PM   #2002
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Dave ya beat me to it Good to hear you are getting your cars set up. See you down there sometime.

Tate
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Old 12-05-2002, 04:03 PM   #2003
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Default Switchblade Discontinued?

I dont know who you were speaking with but, talking with Joel Johnson on tuesday, he didnt mention any discontinues of the Switchblade 2. Check your sources.
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Old 12-05-2002, 04:34 PM   #2004
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Race Report: Qualified 3rd in A final and after a very close and exciting race I came 2nd I love 12th scale, I've only done 6 races ever and I'm already getting better results than in any other class.

At the moment I'm runing about 1.5-2 degrees camber to give even tire wear, does this sound about right?
Thanks
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Old 12-05-2002, 05:13 PM   #2005
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Hello gang,

Thanks for the kind words everyone. They say the year of "firsts" is the hardest when you lose someone, (birthdays, christmas, etc.) I received my renewal notice from Car Action today and it had Grandma's name on it. That was the one gift she got me every year, talk about spooky.

Enough babble, I plan to get some track time this weekend. I need to pick up my game if I plan to run more Triple Crown events.

Dragon, no 'birds' for me but I will be at the Carpet Nats. Trying to get things together for the touring car race up at Trackside.

Darnold, good to see you too. How about those first two quals. Remember Hodapp's car going under the driver's stand! We had some bad traffic that first run! My main was pretty good just had brain fade.

The carpet this year did groove but it didn't seem to get super sticky like the old stuff did. I never once traction rolled the whole week and I didn't see many others do it either. Guess that would explain why my cars were hooked up but not "tippy".

Later,

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Old 12-05-2002, 09:29 PM   #2006
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Speaking of the carpet nats.......when and where are they????.......I thought they were going to be in South Carolina or sumpin'.......
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Old 12-05-2002, 10:00 PM   #2007
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Dragon.....The ROAR carpet nats are in Minnesota at TCHR the first week of March and the NORRCA carpet nats are in Wisconsin at S & N Trackside the last weekend of March I think. Both races whould be awsome as both tracks are very nice and very well run. I hope to make both races not sure on what Im going to race but mod 12th at one for sure.
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Old 12-05-2002, 10:12 PM   #2008
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Lightspeed don.........I dont know if anyone else has answered your question about adjusting the front end of the Switchblade but here goes.....Yes and No....its easier to adjust then the Associated ones b/c with the Associated molds being old the parts are some times not the same left to right so one side will have like 3 deg of castor and the other side has 2 or 4 with the same number of shims on the same sides of the arm. But it can be more tricky to get the Switchblade front end set up properly but once you learn everything and have an "eye" for it its a breeze and way more tuneable.
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Old 12-06-2002, 03:53 PM   #2009
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KevinK.....thanks......maybe it was the "non-carpet"on road nationals that is in So. Carolina????????
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Old 12-06-2002, 04:31 PM   #2010
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Yeah I heard something like that or back to the track in CO I dont know, I wish ROAR would do something.....anything no matter what it is just do something then just what they have been doing....nothing
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