R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

    Hide Wikipost
Old 10-28-2016, 12:43 PM   -   Wikipost
R/C Tech Forums Thread Wiki: 1/12 forum
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
Last edit by: fenton06
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:

Print Wikipost

Reply
 
Thread Tools Search this Thread
Old 11-20-2003, 01:23 PM   #5116
Tech Elite
 
Join Date: Nov 2001
Location: SF Bay Area
Posts: 3,456
Trader Rating: 28 (100%+)
Default

I am new to 12scale and am gonna run 12 scale stock.Whats a good rollout for a medium sized carpet track with techincal infield.Not too tight.Also whats a good stock motor for 12 scale?What springs and brushes particularly.Thanks guys!
racenut123 is offline   Reply With Quote
Old 11-20-2003, 01:37 PM   #5117
Tech Elite
 
Roger's Avatar
 
Join Date: Feb 2003
Posts: 2,312
Trader Rating: 10 (100%+)
Default

Racenut: Did you pick up a 1/12 scale ? Which one did you decide on ?
__________________
http://nitrokb.netne.net/profiles/RogerSerafin.html
Roger is offline   Reply With Quote
Old 11-20-2003, 01:59 PM   #5118
Tech Elite
 
Join Date: Nov 2001
Location: SF Bay Area
Posts: 3,456
Trader Rating: 28 (100%+)
Default

I am going Speedmerchant as its been fast at stockton.The rugrat is equally as fast but I am going the tbarless route.You get that car from Doug.There was 3 heats of 12th scale last night.Imagine went from 3-5 cars in one heat 2 3 heats.Pretty good.I am trying to get others to race 12 stock but pride seems to be getting in the way of some to even try it.We'll see I guess.
racenut123 is offline   Reply With Quote
Old 11-20-2003, 02:13 PM   #5119
Regional Moderator
 
kansasracer's Avatar
 
Join Date: Aug 2001
Location: Olathe, KS
Posts: 1,599
Trader Rating: 3 (100%+)
Default

Guys,

I have been racing for about 3 years and bought the xxx main guide for touring, but it doesn't really work on the 12th scales.

Can anyone go into some detail about basic tuning about these cars? I have a pretty good setup, but there is some great knowledge on these boards, so I thought I would tap into it.

I am doing fairly well in our area in 12th scale, but want to go faster(who doesn't)...

Thanks in advance..

BTW I am running a CRC...I tried to get a speedmerchant but the local LHS doesn't carry them and I tried calling them about 50 times and no answer. So I have 2 CK3.1 (anyone wanna trade a bloody knife for a sm?)

__________________
I am watching.....always watching....
kansasracer is offline   Reply With Quote
Old 11-20-2003, 03:09 PM   #5120
Tech Addict
 
Join Date: Nov 2003
Location: Ridin my Harley
Posts: 707
Trader Rating: 3 (100%+)
Send a message via AIM to Adam Hartzell
Default

Quote:
Originally posted by kansasracer
Guys,

I have been racing for about 3 years and bought the xxx main guide for touring, but it doesn't really work on the 12th scales.

Can anyone go into some detail about basic tuning about these cars? I have a pretty good setup, but there is some great knowledge on these boards, so I thought I would tap into it.

I am doing fairly well in our area in 12th scale, but want to go faster(who doesn't)...

Thanks in advance..

BTW I am running a CRC...I tried to get a speedmerchant but the local LHS doesn't carry them and I tried calling them about 50 times and no answer. So I have 2 CK3.1 (anyone wanna trade a bloody knife for a sm?)

I've got a Rev.3 for cheap. send me an email @ adamhartzell@sbcglobal.net
Adam Hartzell is offline   Reply With Quote
Old 11-20-2003, 03:13 PM   #5121
Tech Master
 
Bobby Z's Avatar
 
Join Date: Sep 2001
Location: Niagara Falls, Ontario, Canada
Posts: 1,117
Trader Rating: 4 (100%+)
Default

I also have a Speedmerchant that I'm willing to part with for the right price. It is only two months old and has some blue anodized upgrades.

E-mail me for details.

bob.zahn@rcniagara.com
Bobby Z is offline   Reply With Quote
Old 11-20-2003, 03:19 PM   #5122
Tech Initiate
 
Join Date: Sep 2003
Posts: 38
Default

Quote:
Originally posted by CypressMidWest
Sorry I shoulda been more specific. 70 or 80 in the center shock. With a stiff spring like the black one you need to go up in dampening as well. I'm currently running Niftech diff lube in my tubes. Thicker dampening really helped generate more corner speed in fast turns for my car.
Thanks,

I'll try moving up from to 40 or 50 to start and put few laps down to see if that helps. 70&80 seems like a lot but that could be the key to getting that extra corner speed since i'm doing everything else. thus far.
gtp03 is offline   Reply With Quote
Old 11-20-2003, 04:06 PM   #5123
Tech Elite
 
nashrcracer's Avatar
R/C Tech Charter Subscriber
 
Join Date: Nov 2001
Location: LA - Lower Antioch
Posts: 4,849
Trader Rating: 1 (100%+)
Default

Quote:
Originally posted by kansasracer
Guys,
snip
BTW I am running a CRC...I tried to get a speedmerchant but the local LHS doesn't carry them and I tried calling them about 50 times and no answer. So I have 2 CK3.1 (anyone wanna trade a bloody knife for a sm?)

remember if your LHS can't get parts for it and carries CRC you have to go mail order if you need parts you don't if they have CRC stuff. that's mostly why so many people stick with AE, you can get parts for them at most LHS. I would rather be racing on the track then sitting on the side calling someone 50 time and still not getting an answer.
__________________
RC50 As you come into this world, something else is also born. You begin your life, and it begins a journey towards you. It moves slowly, but it never stops. Wherever you go, whatever path you take, it will follow never faster, never slower, always coming. You will run, it will walk. You will rest, it will not. One day, you will linger in the same place too long you will sit too still, or sleep too deep. And when, too late, you rise to go, you will notice a second shadow next to yours. Your life will then be over.
nashrcracer is offline   Reply With Quote
Old 11-20-2003, 04:09 PM   #5124
Tech Addict
 
Join Date: Nov 2003
Location: Ridin my Harley
Posts: 707
Trader Rating: 3 (100%+)
Send a message via AIM to Adam Hartzell
Default

I have never had a problem getting stuff from Bruce.
Adam Hartzell is offline   Reply With Quote
Old 11-20-2003, 04:22 PM   #5125
Tech Master
 
stormperson's Avatar
 
Join Date: Sep 2001
Location: MA
Posts: 1,185
Trader Rating: 1 (100%+)
Send a message via AIM to stormperson
Default

Although I have never had issues getting parts from him, some people have and the on-line store Bruce set up on his site, should resolve that.
__________________
R/C Excitement Special Projects Coordinator
Kwik | Speedmerchant | Parma PSE | KO Propo
Team Pickles
stormperson is offline   Reply With Quote
Old 11-20-2003, 06:01 PM   #5126
Tech Master
 
birdy233's Avatar
 
Join Date: Apr 2003
Location: Go Bears!!
Posts: 1,379
Trader Rating: 78 (100%+)
Default

I have a 12L3 and the front wheels keep flying off! Are there supposed to be flanged bearing in the front wheels? What gives? Any help would be appreciated!
birdy233 is offline   Reply With Quote
Old 11-20-2003, 06:11 PM   #5127
Tech Regular
 
RCsilly's Avatar
 
Join Date: Dec 2002
Location: Redford Mi. Trying to keep up with Tim Stamper
Posts: 300
Default

If you are running TRC front wheels , then yes they need flanged bearings, CRC ,JACO, and TMs all use the unflanged.
Bob
RCsilly is offline   Reply With Quote
Old 11-20-2003, 08:03 PM   #5128
Tech Master
 
birdy233's Avatar
 
Join Date: Apr 2003
Location: Go Bears!!
Posts: 1,379
Trader Rating: 78 (100%+)
Default

Thanks!
birdy233 is offline   Reply With Quote
Old 11-20-2003, 08:05 PM   #5129
Super Moderator
 
Kraig's Avatar
 
Join Date: Aug 2001
Location: Sun Prairie, WI
Posts: 6,275
Trader Rating: 69 (100%+)
Default

Hey gang, I just put up on the website the 1/12th Silva Concepts threaded micro shocks. The oval guys just love these things and they will work on 1/12th scale cars also.

I also have their 1/12th medium spring steel t-bars as well. These will work for both 1/12th on-road and 1/12th oval cars. They are right on the front page.

We will also be carrying CEFX 1/12th bodies. Josh was kind enough to send some our way. I will be putting them up on the site as well under car bodies.

1/12th Jaco and TRC foams are back in stock too. Had to get this in before Shane changes the rules on me. (Right Shane.)
__________________
There is great need for a sarcasm font.

You never know when it will strike, but there comes a moment at work when you know that you just aren't going to do anything productive for the rest of the day.

Sometimes I post just to look at my avatar.
Kraig is offline   Reply With Quote
Old 11-20-2003, 08:23 PM   #5130
Tech Elite
 
Roger's Avatar
 
Join Date: Feb 2003
Posts: 2,312
Trader Rating: 10 (100%+)
Default

Quote:
Originally posted by racenut123
I am going Speedmerchant as its been fast at stockton.The rugrat is equally as fast but I am going the tbarless route.You get that car from Doug.There was 3 heats of 12th scale last night.Imagine went from 3-5 cars in one heat 2 3 heats.Pretty good.I am trying to get others to race 12 stock but pride seems to be getting in the way of some to even try it.We'll see I guess.
I've called Doug and he hasn't called back cause the car he is selling me has a disasemmbled rear end. I'll call him tonight and findout what's happening. WOW !! Three heats of 1/12 scale. I guess eveybody is getting ready for teh regionals. Gotta get out there asap.
__________________
http://nitrokb.netne.net/profiles/RogerSerafin.html
Roger is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
New to the forum mig rod Electric Off-Road 1 01-05-2008 05:23 PM
hi i need help and im new to the forum racer4 Rookie Zone 4 01-21-2007 02:37 PM
Why is this forum listed under the On Road Forum? sport10 Onroad Nitro Engine Zone 0 01-11-2007 08:06 AM
Forum Changes... futureal Wisconsin & Illinois Racing 3 10-28-2002 09:26 PM



Currently Active Users Viewing This Thread: 7 (2 members and 5 guests)
antlockyer, robk
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:38 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net

SEO by vBSEO 3.5.0