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 06-09-2002, 06:29 PM   #991
Tech Adept
 
Join Date: Jan 2002
Location: minnesota-twin cities
Posts: 132
Default

How did everyone's race weekends go?

I got 2nd in taxi and convinced about 4 people to run stock 1/12 next weekend WOOHOOO!!!!!
Dave S is offline   Reply With Quote
Old 06-09-2002, 06:34 PM   #992
Tech Adept
 
Join Date: Jan 2002
Location: minnesota-twin cities
Posts: 132
Default

Hey Darnold,

How's it going, man? Petenis and I are going to run stock 1/12 next weekend and we were wondering what ( if any) changes we should make to the cars? Or do we just whip a stocker in, dial some steering out of the radio, and go? We are still in the Nats track configuration, so what would be a good ratio/rollout to start with? I am using the same tires that I used in the Nats, and haven't measured them, but they are smaller than 1.95"


Thanks.
Dave
Dave S is offline   Reply With Quote
Old 06-09-2002, 06:43 PM   #993
Tech Master
 
newracer's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: Ft. Collins, Colorado
Posts: 1,523
Default

my day was great, got to run my 1/12th for the first time, won by 3 laps, granted the comp wasn't all that great but my car was running awesome. I was racing in a stock pan car class, I ran 4 cells w/ a green machine, every one else was running 1/10th and 6 cells
newracer is offline   Reply With Quote
Old 06-09-2002, 07:10 PM   #994
Tech Regular
 
vthondaboi's Avatar
 
Join Date: Jan 2002
Location: Arlington, TX
Posts: 253
Send a message via AIM to vthondaboi Send a message via Yahoo to vthondaboi
Default

Well after almost two months of messing with my 12L3 I finally finished a main and got 2nd rolling in on 3 wheels! I've been having a lot of servo and ESC troubles. I had a Tekin that burned up and took out my Futaba. Then I got a Hitc that stripped on me pretty fast. After that I got some Hobbico's that I thought were stripped but it just so happens that it was my servo saver that was stripped. Every time I hit a wall I would have to stop and adjust my steering trim to adjust it!! Glade all that is behind me.

Just wanted to tell everyone how much I am finally enjoying 1/12 scale racing. Thanks to Jonny Socko for his setup for Finish Line.
__________________
Kyosho ST-RR
Kyosho SP2

E-Flite Blade CX2 Heli
vthondaboi is offline   Reply With Quote
Old 06-09-2002, 08:33 PM   #995
Tech Master
 
newracer's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: Ft. Collins, Colorado
Posts: 1,523
Default

were you using the correct servo saver? Hitec requires a 24 tooth, if you use 23 or 25 it will strip
newracer is offline   Reply With Quote
Old 06-09-2002, 09:10 PM   #996
Tech Fanatic
 
shrekair's Avatar
 
Join Date: Mar 2002
Posts: 946
Trader Rating: 9 (91%+)
Default

vthondaboi - it goes "women are liek a game of bridge, if you dont have a good partner you better have a good hand"
shrekair is offline   Reply With Quote
Old 06-09-2002, 09:32 PM   #997
Tech Regular
 
vthondaboi's Avatar
 
Join Date: Jan 2002
Location: Arlington, TX
Posts: 253
Send a message via AIM to vthondaboi Send a message via Yahoo to vthondaboi
Default

newracer

I'm pretty sure it was the wrong piece that goes between teh servo saver and the servo. We switched that out a few times to find one that works.


shrekair

When referring to "bridge" perhaps the women I see aren't as old as yours?
__________________
Kyosho ST-RR
Kyosho SP2

E-Flite Blade CX2 Heli
vthondaboi is offline   Reply With Quote
Old 06-09-2002, 09:39 PM   #998
Tech Master
 
David Galdo's Avatar
 
Join Date: Aug 2001
Location: Euless, TX
Posts: 1,652
Trader Rating: 15 (100%+)
Send a message via ICQ to David Galdo Send a message via AIM to David Galdo Send a message via MSN to David Galdo Send a message via Yahoo to David Galdo
Default

vthondaboi :: Ha Ha Ha!!! Just keep ahold of that wheel and your will do fine. As sensitive as your steering is never release the wheel and let it center itself. Keep a constant feel of the car and you have better results.
__________________
Hot Bodies | HPI Racing | HPI TV | Speedzone USA | Team Epic | Trinity | TRC
V-Dezign 4.0

Last edited by RCCadet; 06-09-2002 at 10:45 PM.
David Galdo is offline   Reply With Quote
Old 06-09-2002, 10:42 PM   #999
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

Didnt get to race my new car...again...maybe in the next week or 2.....oh well...waitin' on the correct rear springs.
Dragon Slayer is offline   Reply With Quote
Old 06-10-2002, 10:00 PM   #1000
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

Nuttin' much to say...just wanted to get this thread to 1000 posts......where is everyone.....everybody quit 1/12 cause its summer??????
Dragon Slayer is offline   Reply With Quote
Old 06-10-2002, 10:02 PM   #1001
Tech Adept
 
Join Date: Jan 2002
Location: minnesota-twin cities
Posts: 132
Default

Hey Dragon Slayer,

How's it going? What kind of springs are you waiting for? Are they the tweak springs on a CRC? Are you running a 6-pack or a regular version 3.1? I have a 3.1 lying around not doing anything and was going to prep it for a back up for the 12L3 just in case something major happened to it that I didn't have parts to fix. What kind of stuff would you suggest for springs, shock oil, dampener tube goo, and front end setup? I was thinking about ordering an old style front end for it, but it acted so nice with the dynamic caster front in the stock motor days. Just looking for a little hint or two.

I was running .020 springs up front, with the zero degree blocks, purple front TRC or Jaco. I used 40 wt. losi silicone shock oil in the shock, stiff silver spring from CRC, and red tweak springs. It has been a while since I ran stock, but I think I used to roll out around 45-50, with a P2K2 or a P2K. Is there anything that screams out,"wrong!" in my setup? I run at TCHR in Minnesota, which is a large track.

Thanks for any info.
Dave
Dave S is offline   Reply With Quote
Old 06-10-2002, 10:02 PM   #1002
Tech Adept
 
Trikster's Avatar
 
Join Date: Feb 2002
Location: Roseville, CA
Posts: 112
Default

OK, just got my 12L3. She looks really pretty... Now what? I have experience with offroad and TC's... What will I need to know when it comes to 1/12? Is there anything I should look at getting? How does one figure out what pinion/spur to use? I see people refer to roll-out. What might that be? I feel like Cole Trickle in Day's of Thunder. I can drive, but no very little about cars. (I know a lot about full size, but I know just enough to be dangerous with 1/12 scale).
Trikster is offline   Reply With Quote
Old 06-10-2002, 10:40 PM   #1003
Tech Regular
 
vthondaboi's Avatar
 
Join Date: Jan 2002
Location: Arlington, TX
Posts: 253
Send a message via AIM to vthondaboi Send a message via Yahoo to vthondaboi
Default

Trikster - I am in the same exact stage as you.
__________________
Kyosho ST-RR
Kyosho SP2

E-Flite Blade CX2 Heli
vthondaboi is offline   Reply With Quote
Old 06-11-2002, 04:58 AM   #1004
Tech Fanatic
 
Join Date: Mar 2002
Location: Indianapolis, IN
Posts: 864
Default

Trikster - You should polish the pivots for the tee bar.
davidl is offline   Reply With Quote
Old 06-11-2002, 10:36 AM   #1005
Tech Apprentice
 
Join Date: Jan 2002
Location: so. st. paul, mn
Posts: 80
Default

Darnold, I ran my 12th heap after racing (a.k.a. trying to avoid being hit) on saturday, and wow! its awesome it is perfectly balanced. It doesn't push at all and it isn't loose either. All it does is carve real nice, and it's easir on tires since I don't have all that steering dialed in to counter act the push. Thanks alot.

I may be getting a B3 (I know, it's the DARK SIDE) just for some variety, and there is more people showing up for it than the six sedan guys that show up. I figure any racing is racing, so why not give it a whack, right?

Pete Simons
petenis 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: 1 (0 members and 1 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 11:22 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