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 07-01-2004, 11:15 PM   #8086
Tech Fanatic
 
crimson eagle's Avatar
 
Join Date: Jun 2003
Location: Nor Cal
Posts: 841
Send a message via ICQ to crimson eagle
Default

I hope all the 12th guys show up at Ripon who said they were coming out, if they do it will be a blast. Hopefully bring them all to the Revo too. The smack will be flying thick and fast.
crimson eagle is offline   Reply With Quote
Old 07-02-2004, 09:28 AM   #8087
Tech Elite
 
strodedawg's Avatar
 
Join Date: Jul 2004
Location: Philly, PA
Posts: 2,184
Trader Rating: 42 (100%+)
Default

hey,
been practicing with my new 12l4 to get ready for the winter, between the offraod sessions. what do you thing of the quad 12 set-up by powell racing? is it worth it? thanks
strodedawg is offline   Reply With Quote
Old 07-02-2004, 11:00 AM   #8088
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default Q12

I've had a Quad 12 for about a year and I think its a very good car. I use it for modified on carpet. For stock class my Speedmerchant car is faster but I like a t bar car for modified and The Q12 is the best (for me) of all the cars I've tried. Good quality graphite and a good design (although a square front would be more durable). The battery retention system works well (I modified it a little) and of course is quicker in use since it doesn't require tape.
I can't compare the Q12 to the L4 since I've never had the latter but I don't think you will be dissappointed if you try the Q12.
O'D
odpurple is offline   Reply With Quote
Old 07-02-2004, 11:15 AM   #8089
Tech Elite
 
strodedawg's Avatar
 
Join Date: Jul 2004
Location: Philly, PA
Posts: 2,184
Trader Rating: 42 (100%+)
Default

i just ordered it and hope it works. how did you modify the brace? i run mod, what general set-up did you use?
strodedawg is offline   Reply With Quote
Old 07-02-2004, 12:24 PM   #8090
Tech Regular
 
DPowell's Avatar
 
Join Date: Apr 2003
Location: Denver, CO
Posts: 454
Trader Rating: 3 (100%+)
Default Re: Q12

Quote:
Originally posted by odpurple
I've had a Quad 12 for about a year and I think its a very good car. I use it for modified on carpet. For stock class my Speedmerchant car is faster but I like a t bar car for modified and The Q12 is the best (for me) of all the cars I've tried. Good quality graphite and a good design (although a square front would be more durable). The battery retention system works well (I modified it a little) and of course is quicker in use since it doesn't require tape.
I can't compare the Q12 to the L4 since I've never had the latter but I don't think you will be dissappointed if you try the Q12.
O'D
O'D,
You'll be pleased to know that the Q12 chassis is now square in front and features adjustable battery positions while keeping the tapeless Cell Retention System.

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

Speedmerchant and TOP USA dealer.
DPowell is offline   Reply With Quote
Old 07-02-2004, 01:00 PM   #8091
Tech Elite
 
speedxl's Avatar
R/C Tech Charter Subscriber
 
Join Date: Jun 2003
Location: Portland Oregon.
Posts: 3,876
Default

O'D i have the new and current quad 12 it now comes as doug mentioned with a square chassis up front and the batteries now are adjustable.
You will be surprized how much better this car is.
In fact I ran the car at the snow birds in stock placed 8th on the grid in the wednesday night club race and if I would have woken up on time and charged correctly would have made the show.
On my last qualifier It was being announced I was on a TQ paced. I dumped with 30 seconds to go! thats what happens when you wake up late and dont charge.
Should have could have!

Od try the new car in stock! its works!
__________________
Pemberton / R1 / All out motorsports / Team Power Push
speedxl is offline   Reply With Quote
Old 07-02-2004, 02:44 PM   #8092
Tech Master
 
JJ187RC's Avatar
 
Join Date: May 2002
Location: Keller, TX.
Posts: 1,607
Trader Rating: 7 (100%+)
Default 12th scale decision

I am looking at purchasing a new 12th scale. Which car does everyone recommend to purchase?
JJ187RC is offline   Reply With Quote
Old 07-02-2004, 03:02 PM   #8093
Tech Regular
 
Join Date: Mar 2003
Location: UK,the sunny north
Posts: 329
Default newbie to 1/12

thanks for the feedback, have ordered an L4, should be here shortly.
is the car good out of the box, or does it need any after market bits

cheers
__________________
Speedmerchant WGT
Shepherd V10 Velox Idm evo 4
Shepherd V8 velox Idm evo 4
www.DHmodelsport.co.uk
jas1 is offline   Reply With Quote
Old 07-02-2004, 03:27 PM   #8094
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default Q12 squared

Hey Doug-
Glad to hear you've squared off the front-since it's time for me to order a new chassis the new one should last me longer! I'll be calling after the nats.
O'D
odpurple is offline   Reply With Quote
Old 07-02-2004, 03:55 PM   #8095
Tech Elite
 
speedxl's Avatar
R/C Tech Charter Subscriber
 
Join Date: Jun 2003
Location: Portland Oregon.
Posts: 3,876
Default

JJ187 dont ask that it causes hell to break out here! Go to your local track see what everyone is running and find something you like! do research and if you want we will tell you the differences between the cars but you need to know what we are talking about!
__________________
Pemberton / R1 / All out motorsports / Team Power Push
speedxl is offline   Reply With Quote
Old 07-02-2004, 04:53 PM   #8096
Tech Fanatic
 
fast-ho-cars's Avatar
 
Join Date: Sep 2003
Location: it's a dry heat
Posts: 788
Default NEW Q-12's

any photos yet of the revised Q-12 or the Asphalt version?
fast-ho-cars is offline   Reply With Quote
Old 07-02-2004, 04:59 PM   #8097
Tech Master
 
JJ187RC's Avatar
 
Join Date: May 2002
Location: Keller, TX.
Posts: 1,607
Trader Rating: 7 (100%+)
Default

That is just it. There are a number of all the cars. I am just tring to get the pros and cons of the cars.
JJ187RC is offline   Reply With Quote
Old 07-02-2004, 05:00 PM   #8098
Tech Fanatic
 
fast-ho-cars's Avatar
 
Join Date: Sep 2003
Location: it's a dry heat
Posts: 788
Default Re: newbie to 1/12

Quote:
Originally posted by jas1
thanks for the feedback, have ordered an L4, should be here shortly.
is the car good out of the box, or does it need any after market bits

cheers
a few at our track have recently purchased one and the only thing i would add in the beginning is a set of lowered pod plates if you want to get max use out of your tires, but is not mandatory.

the diff is a quality unit for once (by IRS) and is virtually the same as the CRC large ring diff i run (think IRS makes them for CRC).
fast-ho-cars is offline   Reply With Quote
Old 07-02-2004, 05:02 PM   #8099
Tech Master
 
EricF's Avatar
 
Join Date: Jun 2003
Location: AZ
Posts: 1,516
Default

Which cars are you asking about? There are a lot to choose from. Say it with us... Be more specific...

E
__________________
<
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 07-02-2004, 05:08 PM   #8100
Tech Fanatic
 
fast-ho-cars's Avatar
 
Join Date: Sep 2003
Location: it's a dry heat
Posts: 788
Default

hey E

i was talking about/responding to the L4 post.

anyway HT is having a three day race series this weekend, will you be able to make it out this Sat?

your 12th hasn't gotten any scratches on the bottom

later
fast-ho-cars 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 11:04 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