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 11-06-2002, 08:24 AM   #1771
Tech Fanatic
 
mike5009's Avatar
 
Join Date: Sep 2002
Posts: 912
Trader Rating: 2 (100%+)
Send a message via AIM to mike5009
Default crc carpet knife ver.3.1

any body intreted in buying a carpet knife for $60 bucks very good shape no electronics has placed me in "A" main every time. reason for selling is i want to buy a corally sp12. try something different pm me if intrested will have picture posted on for sale thread later today titled futaba 3pj super cobra tire truer and crc carpet knife 3.1
mike5009 is offline   Reply With Quote
Old 11-06-2002, 08:57 AM   #1772
mo
Tech Master
 
mo's Avatar
 
Join Date: Aug 2001
Location: Sacramento, CA
Posts: 1,352
Trader Rating: 7 (100%+)
Default

Quote:
Originally posted by Ec1


Why is it that the right rear side is wider than the left, i have tried to shim the left side out but the car becomes to wide then. Its the same all of our club members cars.
This is why I will never buy another CRC product. I emailed them about this problem 3 times and every time they told me I had the left side hub on backwards. Even after I told them it was on correctly, that was the only answer they had for me. So now I make sure everyone I know doesn't but anything from them.
__________________
TLR, Spektrum, Tekin, SMC, MO-GRIP, www.factory-rc.com https://www.shapeways.com/shops/MPP
mo is offline   Reply With Quote
Old 11-06-2002, 10:19 AM   #1773
Tech Champion
 
Kevin K's Avatar
 
Join Date: Aug 2001
Location: In a land of mini-mighty mental giants
Posts: 8,754
Trader Rating: 32 (100%+)
Send a message via AIM to Kevin K Send a message via Yahoo to Kevin K
Default

Tigger.....Im going to trackside this sunday but Im not racing, he has the region 5 carpet oval race on friday and saturday and there will be no grip in the sweepers so it will be hard to race on I think. I have to work anyway sunday night so thats another reason Im not racing. I dont know for sure who is all is comming but I dont think there will be any mod 12th scale at venture just stock. If your there saturday I will see you then.
__________________
2013 USVTA World Champion of the World
MOTIV RC presents the Midwest All-Star Carpet Series....14th year running 2016/17!!!
USVTA National Championship....check it out!!!
Im only responsible for what I say NOT what you understand.
Kevin K is offline   Reply With Quote
Old 11-06-2002, 11:32 AM   #1774
Tech Master
 
newracer's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: Ft. Collins, Colorado
Posts: 1,523
Default

Ec1- I had the same problem, make sure the left side hub is on correct, if you flip it over the left wheel will be 3-4mm further out than the right.
newracer is offline   Reply With Quote
Old 11-06-2002, 05:20 PM   #1775
Tech Elite
 
Rick Vessell's Avatar
 
Join Date: Jan 2002
Location: Mars
Posts: 2,239
Trader Rating: 8 (100%+)
Default

Dragon,

You are way too low on your rollout. I used to run between 45 and 47 there. That was with my "handout" motors. Depending on which motor you run you should be good anywhere in that range, doot.

Tell TR that I bet he can't run 65!!
__________________
Futaba, O.S. Engines, Tornado Fuel, Schumacher Racing, SpeedPassion USA, Eggroll Inc., Desoto Racing, Vesselli Racing
Rick Vessell is offline   Reply With Quote
Old 11-06-2002, 06:13 PM   #1776
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

Socko.......DAMN....I'll have to go uo 2-3 teeth then...I am running a GM3 by the way......the track is 12 feet wider now....but it is still twisty........thanks...i'll have plenty of time friday night to get it right......you coming down?????

Socko....nobody will turn a 65 lapper on this track....we ran 37 laps last week....38 is possible.....thats how much more track we have......and twisty.

Last edited by Dragon Slayer; 11-06-2002 at 06:17 PM.
Dragon Slayer is offline   Reply With Quote
Old 11-06-2002, 06:58 PM   #1777
Tech Champion
 
Manticore's Avatar
R/C Tech Charter Subscriber
 
Join Date: Aug 2001
Location: Heaven
Posts: 9,999
Default

guys, check this out

NIB Sanwa 141 high speed servo
Manticore is offline   Reply With Quote
Old 11-07-2002, 12:31 AM   #1778
Ec1
Tech Adept
 
Ec1's Avatar
 
Join Date: Nov 2002
Posts: 107
Default

Newracer,
Its not on backwards, i have 2 cars one Crc 3,1 and one Red edition both are the same, 4 more cars on my club also have this problem.... Ithink this is one thing why the Crc are so hard to tweak and be consistent.

The 3300 packs makes 1/12 realy intressting now, here in europe we are only allowed to race 12 wind motors so dumping is not a problem .

We have a big race her in two weeks so im trying to get solwe this annoying rear width problem...
Ec1 is offline   Reply With Quote
Old 11-07-2002, 04:59 AM   #1779
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

if you really dont like CRC then you have two options:

1)buy a speedmerchant, its a very similar design (since it was designed by the same guy) but its more up to date, and also there is support!

2)IRS rear axle. or if you dont want a complete new rear axle then just get a clamping left side hub from them. since i have no clue what you did wrong to get it off, its not like you could of flipped the chassis upside down or anything sinces its countersunk... and you cant really use the wrong holes... any chance that the ride height adjusters in the rear could be not all the way in?

can you take a picture of the car? the back end, a high quality pic or so, since i have seen a multiple CRC's and none of them have had this problem.
stormperson is offline   Reply With Quote
Old 11-07-2002, 05:07 AM   #1780
Tech Champion
 
black-knight's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2001
Location: Out to lunch
Posts: 5,959
Default

We have a race meet commig up in the next months at a local track in my town. Now we will be allowing 4 cell and 6 cell 1/12th cars. Do you guys think a 4 cell car will be competative againt a 6 cell powered car?

thx
__________________
Black-Knight - None shall pass!
www.nbhc.com.au - www.facebook.com/smaracing
black-knight is offline   Reply With Quote
Old 11-07-2002, 05:20 AM   #1781
Tech Fanatic
 
rccarracer's Avatar
 
Join Date: Oct 2001
Location: Sydney, Australia
Posts: 926
Default

I think so, if they allow two separate weights it could really get interesting....
One weight for 4-cell, one for 6-cell.....
rccarracer is offline   Reply With Quote
Old 11-07-2002, 05:23 AM   #1782
Tech Fanatic
 
rccarracer's Avatar
 
Join Date: Oct 2001
Location: Sydney, Australia
Posts: 926
Default

Hey BK, are we allowed 3300's yet here in Aus?
I got an offer from a friend in Japan who's coming to visit me next month to get some really really cheap......
rccarracer is offline   Reply With Quote
Old 11-07-2002, 05:41 AM   #1783
Tech Champion
 
black-knight's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2001
Location: Out to lunch
Posts: 5,959
Default

Quote:
Originally posted by rccarracer
Hey BK, are we allowed 3300's yet here in Aus?
I got an offer from a friend in Japan who's coming to visit me next month to get some really really cheap......
yes 3300's are allowed, hey get me some too
__________________
Black-Knight - None shall pass!
www.nbhc.com.au - www.facebook.com/smaracing
black-knight is offline   Reply With Quote
Old 11-07-2002, 05:47 AM   #1784
Tech Fanatic
 
rccarracer's Avatar
 
Join Date: Oct 2001
Location: Sydney, Australia
Posts: 926
Default

I'll see what I can do, got to talk with him tomorrow....
I think he is getting the GP3300's, but not exactly sure, which do you think is better, the GP or Sanyo?
rccarracer is offline   Reply With Quote
Old 11-07-2002, 05:48 AM   #1785
Tech Fanatic
 
rccarracer's Avatar
 
Join Date: Oct 2001
Location: Sydney, Australia
Posts: 926
Default

Quote:
Originally posted by black-knight
yes 3300's are allowed, hey get me some too
Hey were people running them at nats?
rccarracer 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 03:32 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