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 10-01-2007, 10:51 AM   #27061
Tech Regular
 
Join Date: Feb 2002
Location: MI
Posts: 462
Default

2.65 to 2.79 would be avout right for a sinteres rotor. He's running a SS motor so non sintered.

It's always better to start low with the bonded rotors and work your way up.
Unregistered is offline   Reply With Quote
Old 10-01-2007, 01:41 PM   #27062
Tech Adept
 
Join Date: Jul 2004
Location: europe
Posts: 149
Default SP12 X

Any idea which parts I need to make this rearpod modification?
Thanks
Attached Thumbnails
1/12 forum-sp12xmod.jpg  
benoitrdv is offline   Reply With Quote
Old 10-01-2007, 01:51 PM   #27063
Tech Rookie
 
Join Date: Jul 2007
Posts: 11
Default Roll out & Gearing

OK, I'm new to this so please check my math

A 1.8" tire, 98 tooth Spurgear
What pinion should I be using.

From what I read on the forum I'm looking for a rollout somewhere near 2.5

(1.8 * 3.14) / (100 / Pinion) = 2.5

I get somwhere around a 44 tooth pinion gear. Does this sound like what most people are using?
Ice Drake is offline   Reply With Quote
Old 10-01-2007, 02:01 PM   #27064
Tech Fanatic
 
primusblowsgoat's Avatar
 
Join Date: Jul 2004
Location: Pingree Grove, IL
Posts: 987
Trader Rating: 14 (100%+)
Send a message via AIM to primusblowsgoat Send a message via Yahoo to primusblowsgoat
Default

Quote:
Originally Posted by benoitrdv View Post
Any idea which parts I need to make this rearpod modification?
Thanks
Looks like a Corally axle so I would assume its a Corally pod?

From this website. looks like its the stock pod on the sp12x.
http://www.corallyusa.com/sp12x.htm
__________________
Schumacher Racing
Schumacher Cat SX2
Schumacher Cougar SV
primusblowsgoat is offline   Reply With Quote
Old 10-01-2007, 02:01 PM   #27065
Tech Fanatic
 
FrankW's Avatar
 
Join Date: Nov 2005
Location: PDX
Posts: 969
Trader Rating: 3 (100%+)
Default

Your math is correct, but you might want to find a smaller spur so you can use a smaller pinion. I use a Robinson Racing 78 tooth spur. It'll allow you to go up in pinion size when your tires wear down. Besides, I haven't yet seen a 44 tooth pinion.

-Frank
__________________
http://williams-luge.com
FrankW is offline   Reply With Quote
Old 10-01-2007, 02:01 PM   #27066
Tech Fanatic
 
primusblowsgoat's Avatar
 
Join Date: Jul 2004
Location: Pingree Grove, IL
Posts: 987
Trader Rating: 14 (100%+)
Send a message via AIM to primusblowsgoat Send a message via Yahoo to primusblowsgoat
Default

double post
__________________
Schumacher Racing
Schumacher Cat SX2
Schumacher Cougar SV
primusblowsgoat is offline   Reply With Quote
Old 10-01-2007, 05:22 PM   #27067
Tech Elite
 
Grenade10's Avatar
 
Join Date: Nov 2003
Location: Fort Collins, Colorado
Posts: 4,667
Trader Rating: 37 (100%+)
Default

Scottrick - Nice call on the set up station. I've had my Unity for 15+ years and it does 1/12, 1/10 and 1/8 cale, packs nice does track width, toe and camber with your race tires inplace. So a set up board to check ride height and you are done.

My older one does have a center line groove, and I've seen new units which have a better angle gage, but did not have the center line.
__________________
Darkside, Sweep, BSR, Fantom, IGT Hobbies and IGT8
Byrons Fuel, ProtoForm Bodies & Futaba Radio Gear by Choice
Founding Member of CORRC .... 5280raceway
www.darksidems.com www.igthobbies.com www.IGT8.com
Grenade10 is offline   Reply With Quote
Old 10-01-2007, 05:34 PM   #27068
Tech Elite
 
wallyedmonds's Avatar
 
Join Date: Jul 2006
Location: Brampton ont canada
Posts: 3,662
Default

Quote:
Originally Posted by speedy-932 View Post
Hi,

I've a question about the new JACO Prisms...
What's the minimum front and rear width you can achieve?
I'm just interested as with the CRC High Roller you have a very wide range of adjustment for track width.

Thanks
Cheers
Chris
you have to shim them out a little no wait alot more than the crc tires
you can get a narrower track width with the jacos,
im just lost on tire choice to run,

dose anyone know, if i run crc tires purple fronts and pink rears
what would that be in the new jacos thx
wallyedmonds is offline   Reply With Quote
Old 10-01-2007, 06:45 PM   #27069
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

The new jaco wheel is a very narrow offset. I believe it is 3mm.You will need to shim them out quite a bit more over the CRC wheels. There purple is the same as the Jaco purple and so is there pink. 40 shore purple and 30 shore pink
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 10-01-2007, 07:41 PM   #27070
Tech Champion
 
Scottrik's Avatar
 
Join Date: Sep 2004
Location: Billings, MT
Posts: 6,122
Trader Rating: 238 (100%+)
Default

Quote:
Originally Posted by Ice Drake View Post
From what I read on the forum I'm looking for a rollout somewhere near 2.5

(1.8 * 3.14) / (100 / Pinion) = 2.5

I get somwhere around a 44 tooth pinion gear. Does this sound like what most people are using?
Quote:
Originally Posted by FrankW View Post
Your math is correct, but you might want to find a smaller spur so you can use a smaller pinion. I use a Robinson Racing 78 tooth spur. It'll allow you to go up in pinion size when your tires wear down. Besides, I haven't yet seen a 44 tooth pinion.
Oh yeah...they make 44 (and larger) pinions. The challenge, though, is fitting a 100T spur and a 44T pinion in your rear pod. Won't fit a CRC or Darkside. Frank is correct that if you start with a smaller spur you can use a smaller pinion thus fitting your desired roll-out into the car. As it is, starting with a large tire you probably can't "fit" the desired gears in your pod with a 100T spur and that situation only gets worse as you have to go up 3-4 teeth as your tires wear down to minimum.
__________________
Congressmen should wear uniforms like NASCAR drivers so we can identify their corporate sponsors.

THE REVOLUTION WILL NOT BE TELEVISED -Gil Scott-Heron (1949-2011)
Scottrik is offline   Reply With Quote
Old 10-01-2007, 09:31 PM   #27071
Tech Elite
 
wallyedmonds's Avatar
 
Join Date: Jul 2006
Location: Brampton ont canada
Posts: 3,662
Default

Quote:
Originally Posted by protc3 View Post
The new jaco wheel is a very narrow offset. I believe it is 3mm.You will need to shim them out quite a bit more over the CRC wheels. There purple is the same as the Jaco purple and so is there pink. 40 shore purple and 30 shore pink

thx and what would lilac front and yellow rear's fall around.
jacos sit dosent have these tire's on there yet.
wallyedmonds is offline   Reply With Quote
Old 10-01-2007, 09:53 PM   #27072
Tech Fanatic
 
Join Date: Feb 2004
Posts: 857
Trader Rating: 6 (88%+)
Default

Quote:
Originally Posted by wallyedmonds View Post
thx and what would lilac front and yellow rear's fall around.
jacos sit dosent have these tire's on there yet.

Lilac - 38
Yellow - 30 (I think)
Johnny Carey is offline   Reply With Quote
Old 10-02-2007, 04:10 AM   #27073
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

that is correct johnny. The yellow is the same shore rating as a pink but has less natural rubber than a pink so it frees the car up. The Lilac is 38 shore but has more of the handling characteristics of a 2x pink. It doesnt gum up as bad as a purple.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 10-02-2007, 07:05 AM   #27074
Tech Regular
 
Join Date: Dec 2004
Location: Munich, Germany
Posts: 377
Default

Hi,

thanks. Sounds great.
I don't understand the difference between the magenta and double pink? Which one has more traction? In which one is closer in performance compared to the CRC magenta?

Cheers
Chris
speedy-932 is offline   Reply With Quote
Old 10-02-2007, 07:57 AM   #27075
Tech Elite
 
wallyedmonds's Avatar
 
Join Date: Jul 2006
Location: Brampton ont canada
Posts: 3,662
Default

my purples never gum up
and thats good to know about the yellows
wallyedmonds 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: 2 (1 members and 1 guests)
kiwiazbro
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 05:05 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