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 07-06-2004, 06:17 PM   #8116
Tech Regular
 
DPowell's Avatar
 
Join Date: Apr 2003
Location: Denver, CO
Posts: 454
Trader Rating: 3 (100%+)
Default

Quote:
Originally posted by rdub202
okay please tell me i am not seeing things

are the carpet knife and the L3 front ends identical????
rdub202,
What you are seeing are AE front ends on both cars. Nearly all manufacturers use AE parts for the kits that they produce. Doing this makes getting replacement parts simple and as close as your nearest LHS.

D.P.
__________________
www.powellracingcomponents.com
**Record setting carbon fiber**

Speedmerchant and TOP USA dealer.
DPowell is offline   Reply With Quote
Old 07-06-2004, 06:21 PM   #8117
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default CK and L3

Of course they are. Like most 1/12th cars, the Carpet Knife uses many AE components. The base model CK uses AE rear pod plates as well as the front end. Most t-bar cars have or can use AE t-bars, pivot balls and sockets too. It's actually a good thing, since it contributes to the interchangability of parts between cars.
O'D
odpurple is offline   Reply With Quote
Old 07-06-2004, 06:30 PM   #8118
Tech Fanatic
 
Join Date: Apr 2004
Location: SF Bay Area
Posts: 814
Default Re: CK and L3

Quote:
Originally posted by odpurple
Of course they are. Like most 1/12th cars, the Carpet Knife uses many AE components. The base model CK uses AE rear pod plates as well as the front end. Most t-bar cars have or can use AE t-bars, pivot balls and sockets too. It's actually a good thing, since it contributes to the interchangability of parts between cars.
O'D
And why reinvent something that already works really well.
Crashby is offline   Reply With Quote
Old 07-06-2004, 06:39 PM   #8119
Tech Elite
 
rdub202's Avatar
 
Join Date: Dec 2002
Location: TeamAcademy/MRC, MI
Posts: 2,359
Trader Rating: 19 (100%+)
Send a message via AIM to rdub202
Default

thanks guys i was almost positive but i wanted to be sure. thats sweer cuz i didnt see a lot of crc parts at my lhs but i kno they have good AE support. also i cant seem to get my gear mesh right on my L3 do i have to do some mods on the mount or do i by changce have wrong pitch gears any ideas?

-ryan
__________________
_|Team Academy GV2 Pro_|_Team Academy SBV2 Pro|_--->Losi xxxbK2 (FOR SALE)
_|Factory Tracks Midwest Series_|_www.factorytracks.com|_
_|Team Upgrade-RCid_|_www.upgrade-rc.com|_
_|MRC/Team Academy_|_www.modelrec.com|_
rdub202 is offline   Reply With Quote
Old 07-06-2004, 06:59 PM   #8120
Tech Fanatic
 
Join Date: Apr 2004
Location: SF Bay Area
Posts: 814
Default

Quote:
Originally posted by rdub202
thanks guys i was almost positive but i wanted to be sure. thats sweer cuz i didnt see a lot of crc parts at my lhs but i kno they have good AE support. also i cant seem to get my gear mesh right on my L3 do i have to do some mods on the mount or do i by changce have wrong pitch gears any ideas?

-ryan
You have to do 64 pitch pinions to 64 pitch spur gears. You can't mix 64 pitch or 48 pitch gears.

If you look at the end of your motor that the pinion gear goes on, you will see four mounting holes. Make sure that what ever hole you choose on the top, use the opposite hole on the bottom when bolting in your motor. Also get the gear mesh as close as you can with the minimum amount of gear lash. Rotate the spur gear one or more teeth and check the lash again. Repeat this process until you find the spot where the mesh is the tightest. Most spur gears are not perfectly round and you want to adjust your lash at the place where the spur gear is the tightest. You also might want to purchase some "Fatboys" motor screws and washers from Lundsford. They will provide the most secure way of mounting your motor and almost eliminate the motor moving away from the spur gear even in the most sever of crashes. You will have to file a flat spot on the washer you use on the bottom motor mounting hole or dremel away some of the bottom motor pod plate to ensure the holes line up correctly.
Crashby is offline   Reply With Quote
Old 07-07-2004, 09:11 PM   #8121
Tech Elite
 
JDXray's Avatar
 
Join Date: Mar 2004
Location: Long Island, New York
Posts: 2,802
Trader Rating: 3 (100%+)
Send a message via AIM to JDXray
Default websites

does anyone know of any good sites i can get some parts for a Trinity Reflex 12. I recently just wrecked my car, i broke the whole front end. Everything. Front Top brace, bumper brace, lower left arm and more.
JDXray is offline   Reply With Quote
Old 07-07-2004, 09:14 PM   #8122
Tech Addict
 
BadBoyRC's Avatar
 
Join Date: May 2002
Location: Northern Califiornia | Bay Area
Posts: 532
Trader Rating: 2 (75%+)
Default

tower hobby has some stuff.. if you crashed you might as well get a nother kit and use that one for spare parts.
BadBoyRC is offline   Reply With Quote
Old 07-07-2004, 09:16 PM   #8123
Tech Elite
 
JDXray's Avatar
 
Join Date: Mar 2004
Location: Long Island, New York
Posts: 2,802
Trader Rating: 3 (100%+)
Send a message via AIM to JDXray
Default

i dont feel like spending $200 dollars again on a kit.
JDXray is offline   Reply With Quote
Old 07-07-2004, 09:22 PM   #8124
Tech Addict
 
BadBoyRC's Avatar
 
Join Date: May 2002
Location: Northern Califiornia | Bay Area
Posts: 532
Trader Rating: 2 (75%+)
Default

you can score one on rc univrse or ebay..
BadBoyRC is offline   Reply With Quote
Old 07-08-2004, 01:42 PM   #8125
Tech Master
 
EricF's Avatar
 
Join Date: Jun 2003
Location: AZ
Posts: 1,516
Default

Quote:
Originally posted by JJ187RC
There are L4's
Yokomo's
Carpet Knife's
Speed Merchants
Trinity Reflex

All of these cars are represented at my local track. Also we are running on carpet.

http://www.mikeshobbyshop.com
BadBoyRC - you could try this shop.
__________________
<
AE 12R5.2 (x2) - TC7 - M05 - M05V2R

People who don't have to wait for the latest item, should not tell those that do, that "It's worth the wait"
EricF is offline   Reply With Quote
Old 07-11-2004, 09:00 PM   #8126
Tech Addict
 
Join Date: Jul 2004
Location: Norfolk Nebraska
Posts: 549
Trader Rating: 3 (100%+)
Default

JDXray which parts do you need I may have some of them.
Thanks John Schoenauer
John Schoenauer is offline   Reply With Quote
Old 07-12-2004, 08:45 AM   #8127
Tech Elite
 
JDXray's Avatar
 
Join Date: Mar 2004
Location: Long Island, New York
Posts: 2,802
Trader Rating: 3 (100%+)
Send a message via AIM to JDXray
Default

sent you a pm.
JDXray is offline   Reply With Quote
Old 07-15-2004, 01:13 AM   #8128
Tech Regular
 
Join Date: Jul 2004
Location: Kuala Lumpur Malaysia
Posts: 278
Default Front tire problems

Guys,

I'm new to 1/12 pan car and I need your help. My car oversteers a lot and I often feel that the front steering is too aggresive. I have tried to increase the camber from negative to 0. To my surprise my oversteering problem gets worse sometime.

I also noticed that the outer portion of the tire wears out quickly. Correct me if i'm wrong, the outer tire wear is a sign that the tire grips a lot right? So my question is, which one grips less, is it by going negative camber or going 0 for the camber angle.

Anyway, this is a mystery for me because I also race my TC car and with rubber tire, negative camber always means more grip. I wonder if foam tire is way different from rubber tire when it comes to camber angle.
azmio is offline   Reply With Quote
Old 07-15-2004, 06:06 AM   #8129
Tech Fanatic
 
pucho's Avatar
 
Join Date: Jan 2003
Location: Central, FL
Posts: 804
Send a message via AIM to pucho
Default

you may want to start by using less traction compound on the front tires, put it only in the inside 1/4 of the tire. You could also use a harder front spring. or using a little lube on the king pin to add some dampening. A harder compound tire would also help. I hope this helps.

Luis
pucho is offline   Reply With Quote
Old 07-15-2004, 06:41 AM   #8130
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 Re: Front tire problems

Quote:
Originally posted by azmio
I have tried to increase the camber from negative to 0.
In 1/12 you should run about 1.5 to 2 degrees of camber. Runnning 0 will cause the outter edge of the tire wear way to fast.

Start with 1.5 degrees and only dope 1/8 to 1/3 of the inside of the tire.
Adam Hartzell 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 05:13 PM.


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

SEO by vBSEO 3.5.0