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 07-17-2006, 12:51 AM   #19366
Tech Regular
 
Join Date: Feb 2003
Posts: 285
Default

Quote:
Originally Posted by odpurple
They are not advertising 1/12th for this race. I would go if there are enough 1/12th entries and they would allow it.
Me too!

btw.....found a huge bow in my chassis tonight.
jrrc is offline   Reply With Quote
Old 07-17-2006, 01:06 AM   #19367
RAL
Tech Elite
 
RAL's Avatar
 
Join Date: May 2002
Location: Los Angeles, CA
Posts: 2,205
Trader Rating: 59 (100%+)
Default

Quote:
Originally Posted by odpurple
They are not advertising 1/12th for this race. I would go if there are enough 1/12th entries and they would allow it.
Yeah, there's a 19t 1/12 class. I know for a fact. Thats why I'm going! Its not on the web site but there's one for sure. I know 4 guys that are going there just to race 1/12! I hear PSE pink rears are not working that good though? But they claim CRC pinks work? Is that odd or are the compounds actually diff from manf. to manf.??
__________________
TEAM ARAI GRIP ● J★STYLE ● P1 BRAND ● RÄLDESIGNWERKS ● FANTOM ● EXOTEK
RAL is offline   Reply With Quote
Old 07-17-2006, 06:35 AM   #19368
Tech Regular
 
Join Date: Feb 2002
Location: MI
Posts: 462
Default

The Parma and CRC compounds are probably different. The Parma's are probably a little softer. You just have to set the car up for what ever tire you have.

Normally I end up running magenta fronts with the Parma pinks. This is what gets the car to turn. Grey rears and purple fronts might be the ticket for stock though.
Unregistered is offline   Reply With Quote
Old 07-17-2006, 10:53 AM   #19369
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by RAL
Yeah, there's a 19t 1/12 class. I know for a fact. Thats why I'm going! Its not on the web site but there's one for sure. I know 4 guys that are going there just to race 1/12! I hear PSE pink rears are not working that good though? But they claim CRC pinks work? Is that odd or are the compounds actually diff from manf. to manf.??
RAL
Do you know if the asphalt is sealed there? Parma Pinks don't seem to work on that kind of surface.
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 07-17-2006, 11:16 AM   #19370
Tech Fanatic
 
Join Date: Apr 2004
Location: SF Bay Area
Posts: 814
Default

Quote:
Originally Posted by jrrc
Me too!

btw.....found a huge bow in my chassis tonight.
If the two of you are in, count me in as well!!

Do they spray the track?
Crashby is offline   Reply With Quote
Old 07-17-2006, 11:38 AM   #19371
RAL
Tech Elite
 
RAL's Avatar
 
Join Date: May 2002
Location: Los Angeles, CA
Posts: 2,205
Trader Rating: 59 (100%+)
Default

Quote:
Originally Posted by Crashby
If the two of you are in, count me in as well!!

Do they spray the track?
No they don't spray. The asphalt is unsealed and very porous/abrasive. The traction should be fine, it eats up TC tires like crazy and they run 1/10 oval with foams on the same surface. My buddy just told me the car was loose...but it was also his first time with a 1/12 on the track. So .. I'm sure you guys will have no problem getting the cars to work. Maybe greens, whites or even grays like you guys say? I've never run 1/12 there only TC.
__________________
TEAM ARAI GRIP ● J★STYLE ● P1 BRAND ● RÄLDESIGNWERKS ● FANTOM ● EXOTEK
RAL is offline   Reply With Quote
Old 07-17-2006, 11:54 AM   #19372
Super Moderator
 
Marcos.J's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2003
Location: Semper Fi
Posts: 25,177
Trader Rating: 140 (100%+)
Default

Quote:
Originally Posted by protc3
this was a pretty killer run.i made a couple mistakes but it was pretty consistant for the most part

Race# 5 -- 12 scale 19 turn - Heat #1 round 1 --
Pos Car Laps time name id
1 1 40 8:11.54 Jason breiner 20
2 2 38 8:09.82 Adrian Martinez 24


-- RACE #5 - 12 scale 19 turn - Heat #1 Round 1 --
Car-> __1__ __2__ __3__ __4__ __5__ __6__ __7__ __8__ __9__ __0__
1 1/13.0 2/13.1
2 1/12.5 2/12.4
3 2/12.4 1/12.3
4 1/12.1 2/12.4
5 2/12.6 1/12.2
6 1/12.2 2/12.6
7 2/12.5 1/12.1
8 1/12.0 2/12.1
9 1/12.3 2/12.5
10 1/12.0 2/12.4
11 1/12.0 2/12.4
12 1/11.9 2/12.3
13 1/12.1 2/12.1
14 1/12.1 2/12.1
15 1/12.7 2/12.2
16 1/12.1 2/12.3
17 1/12.2 2/12.0
18 1/12.5 2/12.2
19 2/13.0 1/12.1
20 1/12.3 2/12.5
21 2/12.4 1/12.3
22 1/12.1 2/12.4
23 1/11.9 2/12.3
24 1/12.2 2/12.5
25 1/12.0 2/12.2
26 1/12.3 2/12.4
27 1/12.0 2/12.5
28 1/12.1 2/
29 1/12.1 2/25.7
30 1/12.1 2/13.1
31 1/12.1 2/12.9
32 1/12.2 2/13.2
33 1/12.1 2/12.4
34 1/12.1 2/12.4
35 1/12.1 2/12.4
36 1/12.1 2/12.5
37 1/12.1 2/13.7
38 1/12.5 2/13.4
39 1/12.4 2/13.1
40 1/12.5 2/
_____ _____ _____ _____ _____ _____ _____ _____ _____ _____
laps 40 38
time 491.5 489.8

well atleast Adrian got 2nd
Marcos.J is offline   Reply With Quote
Old 07-17-2006, 12:31 PM   #19373
RAL
Tech Elite
 
RAL's Avatar
 
Join Date: May 2002
Location: Los Angeles, CA
Posts: 2,205
Trader Rating: 59 (100%+)
Default

Hey guys..I called fastlaps and they say there's 4-5 pre-reg' 1/12rs for that two day coming up in CEN-CAL. Sent my reg out today. That makes 6. And I guess its only $35 now for the first class. Come on out guys! We are trying to push 1/12th in Cen/SoCal. You get a raffle entry with your registration when you show up to check in at the race.

And you might win a TC batteries or bodies!!!! There will be manf. sponsored prizes as well. Also they will be giving away some of these!

http://www.pandcracing.com/
__________________
TEAM ARAI GRIP ● J★STYLE ● P1 BRAND ● RÄLDESIGNWERKS ● FANTOM ● EXOTEK

Last edited by RAL; 07-18-2006 at 06:14 PM.
RAL is offline   Reply With Quote
Old 07-17-2006, 12:34 PM   #19374
RAL
Tech Elite
 
RAL's Avatar
 
Join Date: May 2002
Location: Los Angeles, CA
Posts: 2,205
Trader Rating: 59 (100%+)
Default

Quote:
Originally Posted by jrrc
Any of you from SoCal coming for this race?
jrrc...Yeah I'm going up and a couple guys from CAM/Ventura...
__________________
TEAM ARAI GRIP ● J★STYLE ● P1 BRAND ● RÄLDESIGNWERKS ● FANTOM ● EXOTEK
RAL is offline   Reply With Quote
Old 07-17-2006, 12:37 PM   #19375
Tech Regular
 
Join Date: Feb 2003
Posts: 285
Default

Doesn't sound too promising for foam tires without traction compound. Has anyone run 12th scale there?
jrrc is offline   Reply With Quote
Old 07-17-2006, 12:46 PM   #19376
RAL
Tech Elite
 
RAL's Avatar
 
Join Date: May 2002
Location: Los Angeles, CA
Posts: 2,205
Trader Rating: 59 (100%+)
Default

Quote:
Originally Posted by jrrc
Doesn't sound too promising for foam tires without traction compound. Has anyone run 12th scale there?
Who said anyting about no traction compound

Paragon it up!!!
__________________
TEAM ARAI GRIP ● J★STYLE ● P1 BRAND ● RÄLDESIGNWERKS ● FANTOM ● EXOTEK
RAL is offline   Reply With Quote
Old 07-17-2006, 01:06 PM   #19377
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by RAL
Who said anyting about no traction compound

Paragon it up!!!
I think Jim meant without spraying the track. There is usually no bite on un-sprayed surfaces for 1/12th.
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 07-17-2006, 01:29 PM   #19378
Tech Elite
 
Mason's Avatar
 
Join Date: Oct 2004
Location: Ocala, Florida
Posts: 4,581
Default

get out the suntan lotion.
__________________
Mason McCombs
NewRed Hobbies & Indoor Facility
Off-Road, Dirt Oval, Crawlers & Pullers
Mason is offline   Reply With Quote
Old 07-17-2006, 01:31 PM   #19379
Tech Elite
 
RED-LINE M03's Avatar
 
Join Date: Jun 2005
Location: >>> USA <<<
Posts: 4,102
Trader Rating: 127 (100%+)
Default Oh Snap

Quote:
Originally Posted by protc3
this was a pretty killer run.i made a couple mistakes but it was pretty consistant for the most part

Race# 5 -- 12 scale 19 turn - Heat #1 round 1 --
Pos Car Laps time name id
1 1 40 8:11.54 Jason breiner 20
2 2 38 8:09.82 Adrian Martinez 24


-- RACE #5 - 12 scale 19 turn - Heat #1 Round 1 --
Car-> __1__ __2__ __3__ __4__ __5__ __6__ __7__ __8__ __9__ __0__
1 1/13.0 2/13.1
2 1/12.5 2/12.4
3 2/12.4 1/12.3
4 1/12.1 2/12.4
5 2/12.6 1/12.2
6 1/12.2 2/12.6
7 2/12.5 1/12.1
8 1/12.0 2/12.1
9 1/12.3 2/12.5
10 1/12.0 2/12.4
11 1/12.0 2/12.4
12 1/11.9 2/12.3
13 1/12.1 2/12.1
14 1/12.1 2/12.1
15 1/12.7 2/12.2
16 1/12.1 2/12.3
17 1/12.2 2/12.0
18 1/12.5 2/12.2
19 2/13.0 1/12.1
20 1/12.3 2/12.5
21 2/12.4 1/12.3
22 1/12.1 2/12.4
23 1/11.9 2/12.3
24 1/12.2 2/12.5
25 1/12.0 2/12.2
26 1/12.3 2/12.4
27 1/12.0 2/12.5
28 1/12.1 2/
29 1/12.1 2/25.7
30 1/12.1 2/13.1
31 1/12.1 2/12.9
32 1/12.2 2/13.2
33 1/12.1 2/12.4
34 1/12.1 2/12.4
35 1/12.1 2/12.4
36 1/12.1 2/12.5
37 1/12.1 2/13.7
38 1/12.5 2/13.4
39 1/12.4 2/13.1
40 1/12.5 2/
_____ _____ _____ _____ _____ _____ _____ _____ _____ _____
laps 40 38
time 491.5 489.8


OH SNAP.................. 11.9

NICE
RED-LINE M03 is offline   Reply With Quote
Old 07-17-2006, 01:32 PM   #19380
Tech Fanatic
 
Join Date: Apr 2004
Location: SF Bay Area
Posts: 814
Default

Quote:
Originally Posted by RAL
Who said anyting about no traction compound

Paragon it up!!!
I am willing to pay for all of the cherry Coke and the sprayer if they will allow us to spray. It will not do anything to the surface of the parking lot and its environmental friendly as it's just sugar water. But of course, I guess this is a question to put to the race promoters.
Crashby 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 09:09 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