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 07-05-2006, 10:31 AM   #19141
Tech Fanatic
 
Join Date: Nov 2001
Location: Somewhere on earth
Posts: 927
Default

Also on davids car he seems to be running a regular rear pod setup not like on the prototype one where the was no lower carbon piece.
Rick Draper is offline   Reply With Quote
Old 07-05-2006, 10:52 AM   #19142
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Quote:
Originally Posted by protc3
the shock looks to be further forward than stock
Looks like maybe a top plate from a 12M. Anyway, what is stock? The car hasn't been released yet.
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 07-05-2006, 12:48 PM   #19143
Tech Master
 
wingman2's Avatar
 
Join Date: Dec 2005
Location: Tewkesbury, UK via Plymouth, UK.
Posts: 1,259
Default

I was talking to sone one today that knows all the top Brits (including the new World Champ) and was quite intrested in what he had to say. The winning car was a car that DS had made up for himself using Corally and CRC parts. Apparently, alot of the top racers in the UK have been experimenting with running an Associated/CRC front end with what ever rear end with differant amounts of success. DS was the only one to get his own design right (obviously!). The 12x is still going to get released but as you probably know, the team guys struggled at the worlds and I think their top driver ended up in the B final (not so good when you are trying to sell a new chassis to the paying public!). DS's car will not go on general sell because it was a one off special that he made for himself so don't expect to see a Corally chassis with a CRC front end bolted on for general sell anytime soon! Cheers all, Chris.
wingman2 is offline   Reply With Quote
Old 07-05-2006, 12:55 PM   #19144
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Very enlightening, thanks
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 07-05-2006, 03:09 PM   #19145
Tech Addict
 
Join Date: May 2005
Location: California
Posts: 605
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by wingman2
I was talking to sone one today that knows all the top Brits (including the new World Champ) and was quite intrested in what he had to say. The winning car was a car that DS had made up for himself using Corally and CRC parts. Apparently, alot of the top racers in the UK have been experimenting with running an Associated/CRC front end with what ever rear end with differant amounts of success. DS was the only one to get his own design right (obviously!). The 12x is still going to get released but as you probably know, the team guys struggled at the worlds and I think their top driver ended up in the B final (not so good when you are trying to sell a new chassis to the paying public!). DS's car will not go on general sell because it was a one off special that he made for himself so don't expect to see a Corally chassis with a CRC front end bolted on for general sell anytime soon! Cheers all, Chris.
No matter what, I still like the looks of the 12X front end. Less stuff to get sloppy.

Anyone (independent) working on any new front ends? or do I have to sit down and daydream my own up?
__________________
www.freerice.com
Help hungry people while learning.
smojoe is offline   Reply With Quote
Old 07-05-2006, 03:21 PM   #19146
Tech Master
 
wingman2's Avatar
 
Join Date: Dec 2005
Location: Tewkesbury, UK via Plymouth, UK.
Posts: 1,259
Default

I agree. The 12x LOOKS a sweet 1/12th car but if its not performing as hoped by the factory (results were not as good as expected at the euros or worlds) so why change from what I have at the moment? One thing that the US guys have talked about on here is the fact that Corally use their own wheel design, well, I have seen pics of one of the Corally team driver's cars (12x) and that have CRC wheels on it. I don't know what they did on the front because the Corally uses 'live' axles meaning that the bearings are in the steering block, not the wheels but the rear end looked like it had a CRC or IRS rear diff and axle assembly like normal.
wingman2 is offline   Reply With Quote
Old 07-05-2006, 03:28 PM   #19147
Tech Fanatic
 
fast-ho-cars's Avatar
 
Join Date: Sep 2003
Location: it's a dry heat
Posts: 786
Default

i see alot of comments in the 12th and worlds thread concerning the use of AE/CRC front end/parts, center shock, t-bar, stealth type wheels, etc. on the Corally car that won the worlds. i agree that Corally shouldn't claim the SPX12 won, but they in my opinion could claim a Prototype SPX12/DS won. why not. Trinity takes claim when they won a big race with the Widow-12, which to the common person looks like a 12L4 with dampner tubes and sports a Trinity rear pod. who even two years back thought you would see an AE front end or even sold on a Trinity car. now people are amazed that a Corally driver used one and Corally allowed it. near all the 12ths out there use it or reverse engineer (near copy it) like Kawada or like Trinity had one years back near the same in principal.

i also agree that this will put doubts into the minds of prospective buyers of the SPX12 if DS felt he had to alter it as much as he did. as for DS car being available, with custom graphite cutters out there, a near replica could easily be made once the SPX12 is released.

looks like Corally may be willing to change as we now see 3-hole AE stealth style mount wheels on their cars. Jaco 2-stages had alot to do with that. Trinity/TRC has partnered since Cleveland last year with Jaco to use them on their rims. Corally probably found it cheaper to just use them, rather than purchase a license/rights to use/make their own 2-stages like Jack's patented tires?
fast-ho-cars is offline   Reply With Quote
Old 07-05-2006, 03:29 PM   #19148
Tech Elite
 
Turbonium's Avatar
 
Join Date: Feb 2003
Location: Oklahoma
Posts: 2,302
Trader Rating: 27 (100%+)
Send a message via Yahoo to Turbonium
Default

if a standard CRC or IRS rear axle is used, there would have to be some sort of adapter made. as the Corally axles are metric sized. not to say that it couldnt be done... maybe some creative machining of the hubs, or bearing holders. i bet the same could be done for the front stub axles, as well.
__________________
Wes

Team Novak
Turbonium is offline   Reply With Quote
Old 07-05-2006, 03:38 PM   #19149
Tech Master
 
wingman2's Avatar
 
Join Date: Dec 2005
Location: Tewkesbury, UK via Plymouth, UK.
Posts: 1,259
Default

Many years ago (probably 15+), one of the guys at my local club ran a Corally chassis with US style wheels. He had a lathe at home and made the front axles to fit the blocks but they then went mega wide so that the US wheels just slid right on (like normal Corally front wheels do). On the rear of the car, he ran an Associated axle/diff by finding the right size bearings! Back then, it was 2 bolted hubs compared to todays 3 bolted hubs but you get the idea.
wingman2 is offline   Reply With Quote
Old 07-05-2006, 03:50 PM   #19150
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by odpurple
Looks like maybe a top plate from a 12M. Anyway, what is stock? The car hasn't been released yet.
considering it was due to be released right after the worlds,the one in the pictures.and as for the rear suspension changes,what do you think it consists of?the AE T plate,changed weight transfer rate from the moved shock and pivot location.so yes,that is alot.

i in no way am bashing corally or there car.i am just stating that it was not a standard corally.most of the pros change there cars up.i dont knock em for that.thats what they feel is going to work.in this case it did.congrats to dave on his win.he is an unreal driver and he deserved it.hatss off to him for making the car work the way it did.if anyone could make a car work great it is him.enough of the bickering and lets get back to 1/12th chat.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 07-05-2006, 04:08 PM   #19151
Tech Elite
 
RED-LINE M03's Avatar
 
Join Date: Jun 2005
Location: >>> USA <<<
Posts: 4,102
Trader Rating: 127 (100%+)
Default Video

Orion just posted this today.

Here is the link to the Worlds 12th A-Main

http://www.team-orion.ch/Media


Enjoy.........
RED-LINE M03 is offline   Reply With Quote
Old 07-05-2006, 04:17 PM   #19152
Tech Addict
 
Thraex's Avatar
 
Join Date: Nov 2004
Posts: 518
Default

Here's something I just spotted.
In the picture you can see a Laje (swedish) car. But it's not a stock one. The stock one is a T-bar car and this one is a Link car.
Looks like they are experimenting some new things.
__________________
Thijs van M[HPI/HB]
Thraex is offline   Reply With Quote
Old 07-05-2006, 04:51 PM   #19153
Tech Addict
 
Drew_Cat's Avatar
 
Join Date: Dec 2004
Location: NYC
Posts: 609
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Seano
I use them and they are GREAT, much easier than messing with washers and e-clips
I used the the irs for a while but went back to e-clips.... much easier to change a spring if needed IMO.

as far front ends ... less slop = more consistent & less rebuilds IMO.
__________________
Items for sale:

TURBO GFX>>>> http://www.rctech.net/forum/showthread.php?p=4329165#post4329165
Tekin Battery Nurse >>>> http://www.rctech.net/forum/showthread.php?p=4329173#post4329173

Thanks for looking
Drew_Cat is offline   Reply With Quote
Old 07-05-2006, 05:26 PM   #19154
Tech Master
 
SMcpot's Avatar
 
Join Date: Jun 2004
Location: SoCal
Posts: 1,237
Trader Rating: 22 (100%+)
Anyone know why TRC wheels use a different offset compared to JACO? What car were these made to fit?
SMcpot is offline   Reply With Quote
Old 07-05-2006, 05:34 PM   #19155
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

The new TRC wraps are the same as the Jacos.same offset.the older ones had the offset to them similar to the parmas.i just shimmed the hubs out to achieve the width of the Jacos when i ran them.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 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: 3 (2 members and 1 guests)
Grizzbob, vr01
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 12:58 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