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 09-09-2013, 08:23 AM   #39751
Tech Champion
 
RedBullFiXX's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2003
Location: Intergalactic Planetary
Posts: 6,539
Trader Rating: 34 (100%+)
Default

Quote:
Originally Posted by Spillertwo View Post
Okay so they are both as good a choice.
It does seem that there is more info available on the forums for the asso.
Almost nothing to find about the yokomo to read through.
Both are fantastic cars, your assumption about balance is incorrect, all 12th cars are balanced if assembled correctly

Tires for the R5 should be easier to access than for the Yokomo, as the Yokomo uses different wheels than all other standard 12th cars, you could of course change the rear axle/hubs on the Yok to accommodate this

The Yok is super cool though, but I'd suggest that it's more of an expert build than the AE, which is about as easy as it gets for starting out

Check my sig for tons more 12th info
Have fun with whatever new car you decide on
__________________
--> 12th scale Information Source <--

"Men do not quit playing because they grow old; they grow old because they quit playing."
― Oliver Wendell Holmes Jr.
RedBullFiXX is offline   Reply With Quote
Old 09-09-2013, 12:09 PM   #39752
Tech Adept
 
Spillertwo's Avatar
 
Join Date: Jan 2002
Posts: 239
Default

Quote:
Originally Posted by RedBullFiXX View Post
Both are fantastic cars, your assumption about balance is incorrect, all 12th cars are balanced if assembled correctly

Tires for the R5 should be easier to access than for the Yokomo, as the Yokomo uses different wheels than all other standard 12th cars, you could of course change the rear axle/hubs on the Yok to accommodate this

The Yok is super cool though, but I'd suggest that it's more of an expert build than the AE, which is about as easy as it gets for starting out

Check my sig for tons more 12th info
Have fun with whatever new car you decide on
Thanks for the feedback. I'm leaning more and more towards the asso car and now certainly if the Yokomo needs special wheels.

I have been driving the Yokomo BD7 last winter but now want to try my hand at 1/12th since it is better preperation for the summer season. In the summer i race 1/8 nitro on road and people keep telling me that 1/12th is perfect training material for this :-)

Also thanks for the info page through your signature. Found a ton of info through those links and for newbies to 1/12th that is priceless info :-)
Spillertwo is offline   Reply With Quote
Old 09-10-2013, 01:23 AM   #39753
Tech Adept
 
Spillertwo's Avatar
 
Join Date: Jan 2002
Posts: 239
Default

Which body are you guys using ? When i look at the setup sheets i see mostly the Protoform AMR ? The Profotorm TR-12 apparantly is not so popular ?
Spillertwo is offline   Reply With Quote
Old 09-10-2013, 07:49 AM   #39754
Tech Master
 
jsinclair's Avatar
 
Join Date: Jul 2011
Location: rice lake, wi
Posts: 1,036
Trader Rating: 3 (100%+)
Default

For stock the r8c is on the top of my list. http://www.stormerhobbies.com/cgi-bi...=ns&pn=CRC4167
jsinclair is offline   Reply With Quote
Old 09-10-2013, 08:39 AM   #39755
Tech Adept
 
Spillertwo's Avatar
 
Join Date: Jan 2002
Posts: 239
Default

I'm planning on driving 10.5 turn boosted with 1S battery. So looking for a body that can handle the extra speed of that combination. Protoform is easiest to get in my region.
Spillertwo is offline   Reply With Quote
Old 09-10-2013, 09:16 AM   #39756
Tech Master
 
Join Date: Oct 2011
Location: Boulder, CO
Posts: 1,735
Trader Rating: 15 (100%+)
Default

I would recommend the AMR. I have tried both and found that the higher downforce of the TR12 is useful for faster motors in lower traction or if you want a safer car, but it makes the car pushy when traction comes up. Just my opinion though, I know that Haynes uses one to great success in higher traction.
__________________
Chris Hillier | 5280 Raceway | www.5280raceway.com | Racing. Elevated.

Destiny | LRP America | Protoform | Xenon/JFT | Gravity RC | Motiv | Sanwa | Max.FX
LloydLoar is offline   Reply With Quote
Old 09-10-2013, 09:33 AM   #39757
Tech Adept
 
Spillertwo's Avatar
 
Join Date: Jan 2002
Posts: 239
Default

Thanks Llyod i will give the Amr a go.
Spillertwo is offline   Reply With Quote
Old 09-10-2013, 08:47 PM   #39758
Tech Elite
 
DesertRat's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2011
Location: Sniffin the 'Sauce Fumes
Posts: 2,376
Trader Rating: 1 (100%+)
Default

I love Ulti tires and X-compound works great at my local with Paragon sauce, but Ulti makes so many tires and compounds I put it out to the 1/12 community: Which Ultis should I buy to run in 17.5 stock at the IIC running Jack the Gripper?
__________________
I race toy cars for fun. If I need to explain, you'll never understand.
If everything is under control... go faster.
WTB: Carpet racing in Arizona.
It is obvious and intuitive to the most casual of observers that RC racing is better than golf.
DesertRat is offline   Reply With Quote
Old 09-10-2013, 09:45 PM   #39759
Tech Champion
 
RedBullFiXX's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2003
Location: Intergalactic Planetary
Posts: 6,539
Trader Rating: 34 (100%+)
Default

Quote:
Originally Posted by DesertRat View Post
I love Ulti tires and X-compound works great at my local with Paragon sauce, but Ulti makes so many tires and compounds I put it out to the 1/12 community: Which Ultis should I buy to run in 17.5 stock at the IIC running Jack the Gripper?
X-Hard Fr
X-Med Rr

What we've been running all year
__________________
--> 12th scale Information Source <--

"Men do not quit playing because they grow old; they grow old because they quit playing."
― Oliver Wendell Holmes Jr.
RedBullFiXX is offline   Reply With Quote
Old 09-10-2013, 09:58 PM   #39760
Tech Elite
 
DesertRat's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2011
Location: Sniffin the 'Sauce Fumes
Posts: 2,376
Trader Rating: 1 (100%+)
Default

Thanks, RBF, I'll make that the bulk of my purchase.
__________________
I race toy cars for fun. If I need to explain, you'll never understand.
If everything is under control... go faster.
WTB: Carpet racing in Arizona.
It is obvious and intuitive to the most casual of observers that RC racing is better than golf.
DesertRat is offline   Reply With Quote
Old 09-11-2013, 01:03 AM   #39761
Tech Master
 
wingman2's Avatar
 
Join Date: Dec 2005
Location: Tewkesbury, UK via Plymouth, UK.
Posts: 1,259
Default

Quote:
Originally Posted by Spillertwo View Post
Looking for some advice before buying my first 1/12th car:
i have good availability for two cars/parts, namely the Asso RC12R5.2 and the Yokomo R12C3 but i don't know which is better ?

The asso seems to be out of balance with the battery length wise and only the speed control and receiver on the other side ? The yokomo looks better balance with the battery across the car width but has some technical things that seem new to 1/12 like front wire anti roll bar, damping techniques,..

Also not sure which car is better quality ?

People in the club are running mostly older cars so there is no comparaison.

Anybody drive one of these cars and can give some feedback or advice ?
The AE car with the battery down the length is not over to one side with only the speedo and RX to counter balance. This is because the battery is kind of offset from the middle. So, some of the weight of it is on the electronics side. Take a look next time and you will see what I mean. That setup requires a softer suspension setup to get the chassis to roll. Most people in the UK are going with the regular setup of the battery across the chassis. Cheers!
__________________
Sponsored by CML Distribution - http://www.cmldistribution.co.uk
wingman2 is offline   Reply With Quote
Old 09-11-2013, 04:35 AM   #39762
Tech Adept
 
Spillertwo's Avatar
 
Join Date: Jan 2002
Posts: 239
Default

Quote:
Originally Posted by wingman2 View Post
The AE car with the battery down the length is not over to one side with only the speedo and RX to counter balance. This is because the battery is kind of offset from the middle. So, some of the weight of it is on the electronics side. Take a look next time and you will see what I mean. That setup requires a softer suspension setup to get the chassis to roll. Most people in the UK are going with the regular setup of the battery across the chassis. Cheers!
I took another look at the pictures and the battery is indeed offset from the middel. So balance should be okay.
But how are people mounting the batterij across the chassis in the UK ? Are they using another chassis or making slots themselves for the battery tape to secure the battery ?
Spillertwo is offline   Reply With Quote
Old 09-12-2013, 12:30 AM   #39763
Tech Master
 
wingman2's Avatar
 
Join Date: Dec 2005
Location: Tewkesbury, UK via Plymouth, UK.
Posts: 1,259
Default

Its really easy mate, just dremel off the locating tabs on the cross brace, and that's about it. The parts are in the box for the centre shock/roll over mast to be in the correct position when using the battery across the chassis.
__________________
Sponsored by CML Distribution - http://www.cmldistribution.co.uk
wingman2 is offline   Reply With Quote
Old 09-14-2013, 07:47 AM   #39764
Tech Master
 
Join Date: Feb 2012
Posts: 1,215
Trader Rating: 20 (100%+)
Default

OK, sorry to hijack this a bit.

Anyone looking to sell a newer ARTR 1/12?
__________________
www.teamgravityrc.com
Leisure Hours Raceway
Troy Carter is offline   Reply With Quote
Old 09-14-2013, 08:14 AM   #39765
Tech Elite
 
BoneCrusher's Avatar
 
Join Date: Mar 2007
Location: Calgary, Alberta
Posts: 2,126
Trader Rating: 2 (100%+)
Default 1S setup

Does anyone have a starting setup I can try for:

12th Scale Modified using a 4.0 Reedy Mach 2 using a Hobbywing V3.1 1s speedo for an indoor ozite track 36 x 80 feet? Including rollout?

What settings after should I play with with different track types? I'm an intermediate skilled driver.

Anyone's help is much appreciated!

Ivan
__________________
ARC R10, 12R5.1, Tamiya Mini, MTS FFv2 Pro, Exotek F1
carcar.ca
BoneCrusher 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 09:42 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