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 11-19-2007, 03:30 PM   #27541
Tech Regular
 
Capelracer's Avatar
 
Join Date: Oct 2005
Location: Bunbury, West Oz
Posts: 299
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by Capelracer View Post
Have got a CRC T-fource & am awaiting a 12L4 to arrive from fleabay - are the t-bars interchangable & any recommendations on where to purchase them on-line??
Help??
Capelracer is offline   Reply With Quote
Old 11-19-2007, 04:10 PM   #27542
Tech Champion
 
Join Date: Jan 2004
Location: Rockville, MD
Posts: 5,058
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Capelracer View Post
Help??
T-bars are the same. Good place to buy is ashfordhobbies.com Great service.
__________________
Steve Walter
Sweep Racing USA/ Speed Passion USA/ Karens Famous Cookies (Transporter)
SRW141 is offline   Reply With Quote
Old 11-19-2007, 04:10 PM   #27543
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by Capelracer View Post
Help??

yes the tbar for the tforce and also the 12l4 is the same. i beleive teamcrc.com has them for sale. i beleive that ashford hobbies is also a good online source
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup is offline   Reply With Quote
Old 11-19-2007, 04:11 PM   #27544
Tech Elite
 
Jack Smash's Avatar
 
Join Date: Aug 2001
Location: Reno, NV
Posts: 2,880
Trader Rating: 28 (100%+)
Default

I usually run 7-10k on my genx front end. And this is with both the stock kingpins and bushings and using IRS bushings and sanding down the kingpins to the same diameter as the stock AE ones.
__________________
Kyosho / Orion / Amain.com / Protek
Jack Smash is offline   Reply With Quote
Old 11-19-2007, 06:05 PM   #27545
Tech Fanatic
 
Join Date: Jan 2004
Location: Elyria, Oh
Posts: 845
Trader Rating: 4 (100%+)
Default

I heard a rumor that by this time next year xray will have a 1/12th car.

chuck
mackin is offline   Reply With Quote
Old 11-19-2007, 08:49 PM   #27546
Tech Master
 
Join Date: Jul 2003
Location: Wisconsin
Posts: 1,202
Trader Rating: 21 (100%+)
Default

Quote:
Originally Posted by protc3 View Post
I supose you ran 10 degrees of castor as wally does also. That is some upper arm adjustment. Just kidding. I know he meant reactive castor
I didn't realize that you are running a CRC pro-strut front end on a Gen-X to know that the 30,000 doesn't work.
__________________
Thanks to pops

TLR, Fantom, Horizon, Spektrum, Trackside
Brian L is offline   Reply With Quote
Old 11-19-2007, 08:52 PM   #27547
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

Considering you and wally are the only ones doing it, I would have to say it is rediculous. Wayne Gerber junior runs a Gen X with the pro strut front end and runs 3,000 wt. He does pretty damn well if you ask me. 30,000 wt on any front end is insane. I dont care who you are and what you have accomplished with it. You would have a much easier time running the correct fluid.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 11-19-2007, 09:43 PM   #27548
Tech Master
 
Join Date: Jul 2003
Location: Wisconsin
Posts: 1,202
Trader Rating: 21 (100%+)
Default

Check out post 111 in the Gen-X thread and tell him it doesn't work also. What about when Wayne ran .024 springs on the front of his T-Force? I thought that couldn't be run either, but he spanked a lot of people with it. Some people have different driving styles and find different things that work for them. Don't bash someone for running something you have not tried in the exact same conditions.
__________________
Thanks to pops

TLR, Fantom, Horizon, Spektrum, Trackside
Brian L is offline   Reply With Quote
Old 11-19-2007, 10:07 PM   #27549
Tech Initiate
 
Join Date: Aug 2005
Location: Just south of where Strange Brew was Filmed.
Posts: 24
Default Rollout

Stupid question, If I run 52mm tires at the sam roll out as 43mm tires will I get the same result.(speed/run-time)
__________________
Andy Thomas

"I dont race to feel crappy, I race crappy but feel good!!"
TRX-1 is offline   Reply With Quote
Old 11-19-2007, 10:32 PM   #27550
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

it will roughly yield you the same speed and runtime. the difference would be that a 52mm tire will be heavier, so speed will be a little slower and runtime will be a little less. see roll out does not take into account the weight of tires.
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup is offline   Reply With Quote
Old 11-19-2007, 10:43 PM   #27551
Tech Champion
 
Scottrik's Avatar
 
Join Date: Sep 2004
Location: Billings, MT
Posts: 6,123
Trader Rating: 239 (100%+)
Default

Quote:
Originally Posted by TRX-1 View Post
Stupid question, If I run 52mm tires at the sam roll out as 43mm tires will I get the same result.(speed/run-time)
I'd be less concerned about the weight than I would about all that sidewall flex. There's a reason ALL racecars go to pretty much the lowest sidewall allowed by their rules...they perform better.

To say nothing of the tires you'll chunk. The taller the sidewall, generally speaking, the easier they are to chunk. Chunked tires is the absolute proof of false economy. Do yourself a favor, true 'em down to 48.
__________________
Congressmen should wear uniforms like NASCAR drivers so we can identify their corporate sponsors.

THE REVOLUTION WILL NOT BE TELEVISED -Gil Scott-Heron (1949-2011)
Scottrik is offline   Reply With Quote
Old 11-19-2007, 10:46 PM   #27552
Tech Initiate
 
Join Date: Aug 2005
Location: Just south of where Strange Brew was Filmed.
Posts: 24
Default rollout

Ok thanks
__________________
Andy Thomas

"I dont race to feel crappy, I race crappy but feel good!!"
TRX-1 is offline   Reply With Quote
Old 11-20-2007, 01:29 AM   #27553
Tech Adept
 
Join Date: Dec 2003
Location: Oslo, Norway
Posts: 237
Default

Quote:
Originally Posted by FrankW View Post
Hmmm... I never lubed the kingpin before because I didn't want to clean up the mess of lube and tire-dust. I didn't realise that it would have enough effect to make it worthwhile. I'm going to have to try it out now. One question though, do you have to relube after every heat, or will one application last 3 heats?

-Frank
What do you think off this
This have a smal container that have the damping
Alf :-)



More on
T*Star12
alf.skaar is offline   Reply With Quote
Old 11-20-2007, 04:10 AM   #27554
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Brian L View Post
Check out post 111 in the Gen-X thread and tell him it doesn't work also. What about when Wayne ran .024 springs on the front of his T-Force? I thought that couldn't be run either, but he spanked a lot of people with it. Some people have different driving styles and find different things that work for them. Don't bash someone for running something you have not tried in the exact same conditions.
Springs and dampening work COMPLETELY differently. If you look back at my post i wasnt bashing him. I was trying to help him and was very nice to him. I explained it to him.

There is standard practice in these cars and if you need to do something that out of the ordinary,It is usually compensating for an issue somewhere else. If you want to run it go ahead. Its your car and it is a fun hobby. Those who get bullheaded will never learn. Keep an open mind without taking offense to everything.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 11-20-2007, 05:42 AM   #27555
Tech Fanatic
 
Join Date: Oct 2006
Location: Hastings, MN
Posts: 825
Send a message via AIM to $rusty$ Send a message via MSN to $rusty$
Default

So, since your telling me to try something new. Does that mean I can run 10 degrees of caster?
__________________
Rusty Andersen

thercbarn.com
$rusty$ 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: 2 (0 members and 2 guests)
 
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 07:47 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