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 06-14-2002, 05:24 PM   #1021
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

Darnold....not much...just trying to get to the track to try out my Knife......

Socko....sup bro?
Dragon Slayer is offline   Reply With Quote
Old 06-14-2002, 05:58 PM   #1022
Tech Elite
 
Rick Vessell's Avatar
 
Join Date: Jan 2002
Location: Mars
Posts: 2,239
Trader Rating: 8 (100%+)
Default

Dave,

Sounds good. I get off early enough that I could make it up there by 6:30 I think. I shoot you a message with details when I can make it.

Dragon,

Not much. How about you? Is the track still at the "House" or did TR move it to his new place? I'm still interested in his old carpet. Might try to set something up around here, plenty of empty real estate for cheap. That's one of the advantages of living on a closed military base, lotsa unused buildings!

I'm gonna try for Oktoberfast this year. It's the only Triple Crown track I haven't been to except for Madness out in CT.
__________________
Futaba, O.S. Engines, Tornado Fuel, Schumacher Racing, SpeedPassion USA, Eggroll Inc., Desoto Racing, Vesselli Racing
Rick Vessell is offline   Reply With Quote
Old 06-14-2002, 07:39 PM   #1023
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

Socko......glad to hear you're still with us.....the track is still at the House....you'll have to ask him about the carpet......
Dragon Slayer is offline   Reply With Quote
Old 06-14-2002, 10:25 PM   #1024
Tech Fanatic
 
Join Date: Aug 2001
Location: Washington state
Posts: 962
Default Please help a new 12th scaler

Attention Switchblade owners -- check out the thread "need help with old car please." This guy bought an old one and has some questions about parts and updating it. He has pics posted. Thanks.
coolrcdad is offline   Reply With Quote
Old 06-15-2002, 01:04 AM   #1025
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

Shrekair(Jame E.)- How are things going with you? Glad to hear from you. The answer is "Lord willing and the creek doesn't rise" I should be there. I really enjoy running at that track and with the guys that race there. I might even be up in August and run a club race or two, who knows.-Dave A.
darnold is offline   Reply With Quote
Old 06-15-2002, 01:07 AM   #1026
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

Hey J.S. and D.S.- Glad things seem well with you. J.S. I look forward to the e-m when you're ready and hope you make Oktoberfast. Now to check out that thread for the switchblade help, hopefully I can help....
darnold is offline   Reply With Quote
Old 06-16-2002, 04:52 PM   #1027
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

WOW.....we almost dropped off the bottom......didnt get to race again this weekend
Dragon Slayer is offline   Reply With Quote
Old 06-16-2002, 11:54 PM   #1028
Tech Fanatic
 
shrekair's Avatar
 
Join Date: Mar 2002
Posts: 946
Trader Rating: 9 (91%+)
Default

purple-gray , magenta-gray, or green green?
shrekair is offline   Reply With Quote
Old 06-18-2002, 05:32 AM   #1029
Tech Fanatic
 
Join Date: Mar 2002
Location: Indianapolis, IN
Posts: 864
Default

OKAY, this is a survey for the summer months before the carpet season starts in the Fall.

1) Has anyone heard of any new upgrades, options, or modifications to any of the current 1/12 scale cars? If so, what are they?

2) Will any of the car manufacturers offer a new 1/12 onroad car for the upcoming season?
davidl is offline   Reply With Quote
Old 06-18-2002, 08:19 AM   #1030
Tech Regular
 
ausracer's Avatar
 
Join Date: Dec 2001
Posts: 276
Default

on the opening page of www.yokomousa.com they say they will be selling the yokomo 1/12 world champ chassis in limited quantities.
ausracer is offline   Reply With Quote
Old 06-18-2002, 08:43 AM   #1031
Tech Fanatic
 
Join Date: Mar 2002
Location: Indianapolis, IN
Posts: 864
Default

Is this supposed to be an entire car or just the chassis plates like they marketed last year?
davidl is offline   Reply With Quote
Old 06-18-2002, 11:22 AM   #1032
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

DaveL- May be the whole car this time since they sold a "conversion" kit or at least the chassis plate last year. Your buddy from the Track had either a conversion or at least the chassis plate and loved it. But who knows. I've also found out that a conversion kit for the older switchblade exist from Trinity for about $90 and it includes all of the graphite parts. Supposedly word is that Assoc. has been working on a new 12th car and it may be out this Christmas. Corraly's cars in the A final of this years Worlds had some subtle but substanative updates on it so this may make its way in some type of conversion kit into production.

Shrekair- Purple fronts/Gray rears or Magenta fronts/ Gray rears for carpet. I prefer Magenta/Gray. For asphalt it's normally Purple fronts/Pink Rears but according to Orion's coverage of the Worlds Masami used yokomo 35's on the rear. If these "35's" are a shore reading then they would equal Magentas or Pinks (they fall right between TRC Magenta and Pink shore ratings). Jaco also has "35's" which many consider the equivalent of a magenta.
darnold is offline   Reply With Quote
Old 06-18-2002, 11:36 AM   #1033
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

opps- substanative should be substantive.

Oh yeah, while still on the new products for 12th season bit: concerning modified motors a fairly new tuner has shown up called LUNA and they use the Ti teardown. The owner/operator of this company used to be Hara's motor guy. These motors have been making quite a stir it seems this year due to their off the self performance. They appear to be more efficient with greater H.P. than you might expect for an over the counter motor. They can be bought through their importer Speedworld and subsequent hobby shops.

LRP has come out with a new charger that looks pretty trick. It has a 10amp discharge feature along with some other nice points. One of these points is the ability to change charge rate While you are charging! It also has a motor break-in function of 0-9 amps with a 2v-7.2v adjustment!
darnold is offline   Reply With Quote
Old 06-18-2002, 12:38 PM   #1034
Tech Fanatic
 
shrekair's Avatar
 
Join Date: Mar 2002
Posts: 946
Trader Rating: 9 (91%+)
Default

does the trinity front end fit on a crc or associated chassis?
shrekair is offline   Reply With Quote
Old 06-19-2002, 05:40 AM   #1035
Tech Fanatic
 
Join Date: Mar 2002
Location: Indianapolis, IN
Posts: 864
Default

Darnold - regarding tires, you didn't mention that TRC purple was on the front of the winning car at the Worlds. Then, the Jaco 35 is for front only and has only been available to team drivers in the past. Still don't know if you and I can get them.

Regarding the Yokomo 1/12 scale car, their website says the car will be available soon. I don't know if that is semantics on their part and they only intend to sell the chassis pieces or if they really will sell an entire car. The car that was run by my friend, Perry Caswell, in Maryland finally fell in his favor to the Associated 12L3, modified to be a lot like the CRC 6-Pack. Perry never runs a "stock kit" car. One of the things he learned was that the layout on the Yokomo chassis narrowed the front track. He didn't have access to a lot of choices for tires, so I think that made his change back to an American car a given. The Yokomo car appears to use a lot of Associated plastic in the suspension.

You mentioned the subtile changes to the Corally's. I have played with a 12M lately and added a VCS shock to the center. It is pretty stable, but had some steering issues. It would probably be pretty good on pavement, which was the surface used at the Worlds. I don't think we can go by that since we run carpet. Just wanted to bring that point to the conversation.

Tag, your it.
davidl 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: 4 (0 members and 4 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 11:50 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