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 10-09-2005, 09:50 PM   #14806
Tech Champion
 
Still Bill's Avatar
 
Join Date: Jan 2004
Location: Reno, NV
Posts: 7,016
Trader Rating: 11 (100%+)
Default

Thanks Michael.
__________________
Constantly evolving CRC WGT and WGT-R/T...Carpet & Asphalt...All thanks to Team CRC.
Still Bill is offline   Reply With Quote
Old 10-09-2005, 09:58 PM   #14807
Tech Adept
 
Join Date: Oct 2001
Location: Auckland, New Zealand
Posts: 148
Send a message via ICQ to Seano
Default

Quote:
Originally Posted by jammin jim
Hi Guys, Sorry to butt in here but I need some advice on how to tune a 1/12th scale car. I run a Hara Hammer currently and was wondering where, if at all I could find some sort of tuning guide for these cars. I've been looking all over the net but have yet to find anything good. Please let me know if you are aware of anything.
Thanks a million,
Jim
Try here http://home.sc.rr.com/mlufaso/rc/12l4/index.html
Seano is offline   Reply With Quote
Old 10-10-2005, 07:45 AM   #14808
Tech Adept
 
StoneMan's Avatar
 
Join Date: Nov 2003
Location: Maple, Ontario, Canada
Posts: 133
Default

Want to change to Spektrum DSM in my T-Force. Did a search and I'm satisfied that there doesn't seem to be any issues with 19T.
My question is do you leave the ridgid antenae on the car, cut it down, or replace it with a flex one? I run a short one on the TC and Nitro.
I think that cutting it down will lower the CG quite a bit.
Any opinions?
Thanks
StoneMan is offline   Reply With Quote
Old 10-10-2005, 07:53 AM   #14809
Tech Regular
 
Fuzzy's Avatar
 
Join Date: Jul 2003
Location: Mentor , Ohio
Posts: 397
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by StoneMan
Want to change to Spektrum DSM in my T-Force. Did a search and I'm satisfied that there doesn't seem to be any issues with 19T.
My question is do you leave the ridgid antenae on the car, cut it down, or replace it with a flex one? I run a short one on the TC and Nitro.
I think that cutting it down will lower the CG quite a bit.
Any opinions?
Thanks
Don't cut it down or replace it with a flex tube. The first time your car rolls over from contact you'll be regreting it. The fiberglass post gives the car a better chance of flipping back onto it's wheels after contact.
Fuzzy is offline   Reply With Quote
Old 10-10-2005, 08:12 AM   #14810
Tech Elite
 
squarehead's Avatar
R/C Tech Charter Subscriber
 
Join Date: Nov 2003
Location: Wheaton, Illinois
Posts: 4,210
Trader Rating: 75 (100%+)
Send a message via AIM to squarehead Send a message via MSN to squarehead Send a message via Yahoo to squarehead Send a message via Skype™ to squarehead
Default

Here's a better idea. Keep them both.

The Associated plastic antenna base/shock mount found in MANY cars now, has three holes in it. I mounted the shock in the rear-most hole, and shortenend up the shock length with shorter ball links. I took a stock rollover mast and inserted it into the middle hole in the mount. In the side of the mount, I drilled a .0625" hole straight through with a bit of an angle towards the top of the mount. In the front hole, I used a short flex antenna to house the DSM antenna, which was cut to 3.6" short.

Everything works perfectly with a 19T. I will use this same setup on all future 12th scale cars.
__________________
Everything depends.
Nothing is always.
Everything is sometimes.

Last edited by squarehead; 11-29-2010 at 03:55 PM.
squarehead is offline   Reply With Quote
Old 10-10-2005, 08:16 AM   #14811
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

you could do all that, but I just wrapped it around the upright antenna and then heat shrunk it down. ends up being just about .5" of looped antenna at the base of the upright. I ran it wil a 9x2 with no cap or rx pack.
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup is offline   Reply With Quote
Old 10-10-2005, 09:00 AM   #14812
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

any1 have any pics of a 1/12 with brushless? I want to see some pics and also if any1 has any experience with running a brushless. They looks so big and heavy, was not sure how well it would work in a 1/12
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup is offline   Reply With Quote
Old 10-10-2005, 09:03 AM   #14813
Tech Apprentice
 
Katana Man's Avatar
 
Join Date: Sep 2005
Posts: 66
Default

Here's my 12L4 with a brushless set up:

Man is it ever smooth! And it flies when I ask it to.
Katana Man is offline   Reply With Quote
Old 10-10-2005, 11:14 AM   #14814
Tech Fanatic
 
fast-ho-cars's Avatar
 
Join Date: Sep 2003
Location: it's a dry heat
Posts: 781
Default

Quote:
Originally Posted by theisgroup
any1 have any pics of a 1/12 with brushless? I want to see some pics and also if any1 has any experience with running a brushless. They looks so big and heavy, was not sure how well it would work in a 1/12

Mike Lufaso just won the OnRoad Nationals. his website pics his car with a brushless setup. don't know if that is what he ran?

http://home.sc.rr.com/mlufaso/rc/12l4/index.html
fast-ho-cars is offline   Reply With Quote
Old 10-10-2005, 11:23 AM   #14815
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default

Thats what he ran. He had the power to pull 10 car lengths at will on the straight anytime any brushed car challenged him.
__________________
Adrian Martinez
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series
AdrianM is offline   Reply With Quote
Old 10-10-2005, 12:17 PM   #14816
Tech Elite
 
squarehead's Avatar
R/C Tech Charter Subscriber
 
Join Date: Nov 2003
Location: Wheaton, Illinois
Posts: 4,210
Trader Rating: 75 (100%+)
Send a message via AIM to squarehead Send a message via MSN to squarehead Send a message via Yahoo to squarehead Send a message via Skype™ to squarehead
Default

Can anyone tell me where I can purchase the front end brace shown below?
__________________
Everything depends.
Nothing is always.
Everything is sometimes.

Last edited by squarehead; 11-29-2010 at 03:55 PM.
squarehead is offline   Reply With Quote
Old 10-10-2005, 02:14 PM   #14817
P2
Tech Fanatic
 
P2's Avatar
 
Join Date: Aug 2003
Location: Oahu, Hi
Posts: 865
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by theisgroup
any1 have any pics of a 1/12 with brushless? I want to see some pics and also if any1 has any experience with running a brushless. They looks so big and heavy, was not sure how well it would work in a 1/12
Here is a pic of my Rugrat I ran last weekend at HTSA, car was very fast and runtime was great. W/3700s I had between 800-900mah of runtime left after each race. Car felt like a brushed motor, the BL motor weighs 10g lighter than my brushed motor and the Shpere is around 10g heavier than my QC2. I was geared at 35.5mm rollout, motor temp was 150*F and Sphere was 140*F. Overall I was very impressed and didn't touch the motor once
Attached Thumbnails
1/12 forum-img_2874.jpg  
__________________
TopRacingUSA | Team EPIC | Thunder Power | OD Racing
P2 is offline   Reply With Quote
Old 10-10-2005, 02:38 PM   #14818
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

so is this your regional's setup?
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup is offline   Reply With Quote
Old 10-10-2005, 02:54 PM   #14819
P2
Tech Fanatic
 
P2's Avatar
 
Join Date: Aug 2003
Location: Oahu, Hi
Posts: 865
Trader Rating: 15 (100%+)
Default

I would like to run the BL for mod, I was fighting setups all day and the car was very hard to drive (but fast). I'm not sure if it was due to the BL or not I will give it a try again next weekend and see what happens...of course the track layout is going to change in the next 2 weeks.
For Stock I'm using a QC2 w/handout motor.
See you soon,
Paul
P2 is offline   Reply With Quote
Old 10-10-2005, 03:07 PM   #14820
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

that is cool, we are head down on friday.
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE
theisgroup 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 (0 members and 3 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 11:31 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