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 08-11-2014, 09:29 PM   #41131
Tech Master
 
Car Breaker's Avatar
 
Join Date: Apr 2004
Location: Grave Yard
Posts: 1,251
Trader Rating: 10 (100%+)
Default

tire of slop I just put enlarge the hole on my X12's steering block to fit a AE kingpin and CRC brass ball. hopefully I can reduce slop on my car.

never understand why Xray designed their steering base off AE instead of CRC which is far superior
__________________
Xray X12 2015
ARC R10 ATS
Car Breaker is offline   Reply With Quote
Old 08-11-2014, 09:37 PM   #41132
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

If only someone built a study front end, with no "slop"

hmm
might look something like this

rev8
__________________
--> 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 08-11-2014, 10:42 PM   #41133
Tech Master
 
EDWARD2003's Avatar
 
Join Date: Jan 2003
Location: Kagoshima, Japan
Posts: 1,919
Trader Rating: 6 (100%+)
Default

Surprised no one has used the Awesomatix shocks and worked it onto the front end of a 1/12th.

https://www.youtube.com/watch?v=RFuvV76SLBU
EDWARD2003 is offline   Reply With Quote
Old 08-11-2014, 11:19 PM   #41134
Tech Master
 
LonnyJ1950's Avatar
 
Join Date: Aug 2009
Location: Tucson, AZ. USA
Posts: 1,139
Default

Quote:
Originally Posted by InspGadgt View Post
If it is suspension pivot slop you'll want to look at the CRC either the Xti or the Altered Ego. While some companies have a screw on the lower arm to take out slop in the lower pivot ball...only CRC has a pillow ball joint for the upper suspension pivot point so you can remove slop out of both the upper and lower outside pivot points. You will still have some slop develop at the inner pin point though.
I was sure my Serpent had an adjustable upper pillow ball. Hmmm.
__________________
Lonny
LonnyJ1950 is offline   Reply With Quote
Old 08-12-2014, 02:58 AM   #41135
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,157
Default

Quote:
Originally Posted by RedBullFiXX View Post
If only someone built a study front end, with no "slop"

hmm
might look something like this

rev8
Even that will develop slop over time...only thing is there is nothing in there to adjust the slop out other than replacing parts.

Quote:
Originally Posted by EDWARD2003 View Post
Surprised no one has used the Awesomatix shocks and worked it onto the front end of a 1/12th.

https://www.youtube.com/watch?v=RFuvV76SLBU

I've always said I'd love to see Awesomatix develop a pan car...I'd probably run it

Quote:
Originally Posted by LonnyJ1950 View Post
I was sure my Serpent had an adjustable upper pillow ball. Hmmm.
Your right...the Serpent also has a pillow ball upper arm and I believe a slop adjustment in the lower arm as well like the CRC. I ran one on my BMI for awhile and liked it overall but had a couple issues with it. The arms had a lot more slop at the hinge pin...some super thin shims will take care of this though. And the lower mounts are just too long so on cars not made specifically for that front end it is very difficult to get a bumper on it.
__________________
Apex RC
www.apexrc.com - Hawaii's #1 RC Proshop

Share & Like Our Page:https://www.facebook.com/ApexRCProshop
Win free stuff!
InspGadgt is offline   Reply With Quote
Old 08-12-2014, 08:01 AM   #41136
Tech Regular
 
Conrad's Avatar
 
Join Date: Jun 2005
Location: Scotland
Posts: 456
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by cyrrus View Post
Conrad

Can you point me to where I can purchase these looking for two to run with my rbs In Wgt and another for 12 scale thanks

I just checked the web site.

Also I haven't ran my rbs in a while what does the latest update for it does
I don't think Max has put it up on the TW website yet but I know he as them as does Keith at Much More UK/rcracinguk.com just drop either of them an email and I'm sure they will be able to sort you out.

The RBS will run without a voltage booster just fine but your servo and receiver will only be working at battery voltage, as long as it stays above 3.5v during the run you are golden. Below that the esc looses its settings.

The latest RBS firmware offers time/throttle dependent boost, the heavier your thumb the boost you get right away, Turbo still kicks in at full throttle regardless of boost settings. I do have some specific 1S firmware but it's only for blinky racing, their is no boost/turbo options on it.
__________________
Swith Racing [www.swithracing.co.uk]
Conrad is offline   Reply With Quote
Old 08-12-2014, 05:30 PM   #41137
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 Car Breaker View Post
tire of slop I just put enlarge the hole on my X12's steering block to fit a AE kingpin and CRC brass ball. hopefully I can reduce slop on my car.

never understand why Xray designed their steering base off AE instead of CRC which is far superior
All of the front ends are based off of AE. The CRC is just a pivot ball version. With the long arm up top, it just moves the upper hing point back to where AE has it. The AE front end really set a standard and the current front ends are refined versions. The SM is a nice revision of the AE front end that was used prior to the strut. So, in a nut shell, X Ray didnt do anything out of the norm.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 08-12-2014, 07:06 PM   #41138
Tech Regular
 
Join Date: Nov 2008
Location: Garner, NC
Posts: 387
Default

Quote:
Originally Posted by protc3 View Post
All of the front ends are based off of AE. The CRC is just a pivot ball version. With the long arm up top, it just moves the upper hing point back to where AE has it. The AE front end really set a standard and the current front ends are refined versions. The SM is a nice revision of the AE front end that was used prior to the strut. So, in a nut shell, X Ray didnt do anything out of the norm.



Could always go back to this front end. All of these front suspensions develop slop over time due to the kingpin sliding up and down. Good thing 1/12 parts are cheap and easy to replace. I had been running the Speedmerchant old skool front end for a while and there was very little slop in it, I have also ran the CRC front end and it just had to be adjusted to remove slop. The new Speedmerchant front end is great!
avink007 is offline   Reply With Quote
Old 08-12-2014, 07:21 PM   #41139
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

The SM front end is very nicely done. I like all of the improvements all of the latest front ends offer. They all have there high points. Of all of them though I think the SM is the most simple and functional. With the high traction levels we see, no camber gain is the ticket. I dig it.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 08-12-2014, 07:28 PM   #41140
Tech Master
 
Car Breaker's Avatar
 
Join Date: Apr 2004
Location: Grave Yard
Posts: 1,251
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by avink007 View Post


Could always go back to this front end. All of these front suspensions develop slop over time due to the kingpin sliding up and down. Good thing 1/12 parts are cheap and easy to replace. I had been running the Speedmerchant old skool front end for a while and there was very little slop in it, I have also ran the CRC front end and it just had to be adjusted to remove slop. The new Speedmerchant front end is great!
at least slop can be reduced easily by adjustment instead of replacing parts. xray arent cheap to replace compared to other brand which parts are not locally available. I run my car about twice per weak using 4.5t motor on asphalt track all year long. if I have to replace parts for slop that is one set of front end every month.

I am dreaming someone someday will make a car I want which is a matric crc front end on xray chassis using xray grade material.
Car Breaker is offline   Reply With Quote
Old 08-12-2014, 07:29 PM   #41141
Tech Champion
 
hanulec's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2007
Location: @ the post office
Posts: 8,006
Trader Rating: 23 (100%+)
Default

Quote:
Originally Posted by EDWARD2003 View Post
Surprised no one has used the Awesomatix shocks and worked it onto the front end of a 1/12th.

https://www.youtube.com/watch?v=RFuvV76SLBU
could happen...
__________________
FJ / ROAR #2-122945 / Shop@ Awesomatix USA / Wild Turbo Fan / Mon-Tech Racing / RocheRC USA / Side Piece /
LRP / John's BSR Tires / TeamEAM / TQ Wire / R1 / Team Scream / PCR / MIX
RacerLog wiki Awesomatix A700 / 2wd offroad 4 life
hanulec is offline   Reply With Quote
Old 08-12-2014, 08:30 PM   #41142
Tech Elite
 
metalnut's Avatar
R/C Tech Elite Subscriber
 
Join Date: Feb 2013
Location: Seattle
Posts: 2,726
Trader Rating: 36 (100%+)
Default

Quote:
Originally Posted by hanulec View Post
could happen...
You've heard it here first, folks. Hype!
__________________
Team Nervous | Team Scruffy | Team Orange

"If you ain't first, you're last!"
- Ricky Bobby
metalnut is offline   Reply With Quote
Old 08-12-2014, 08:33 PM   #41143
Tech Regular
 
Join Date: Nov 2008
Location: Garner, NC
Posts: 387
Default

Quote:
Originally Posted by Car Breaker View Post
at least slop can be reduced easily by adjustment instead of replacing parts. xray arent cheap to replace compared to other brand which parts are not locally available. I run my car about twice per weak using 4.5t motor on asphalt track all year long. if I have to replace parts for slop that is one set of front end every month.

I am dreaming someone someday will make a car I want which is a matric crc front end on xray chassis using xray grade material.
You might look into the Serpent front end in that case. Quality is really good, same style suspension as CRC with the pillow ball upper arm, but all metric hardware. Maybe someone who owns one can measure the hole spacing and you could fit it in your Xray. http://www.stormerhobbies.com/cgi-bi...s&pn=ser411178
avink007 is offline   Reply With Quote
Old 08-14-2014, 06:30 AM   #41144
Tech Adept
 
Peakki's Avatar
 
Join Date: Nov 2006
Location: Finland
Posts: 143
Trader Rating: 1 (100%+)
Default

Thoughts about Xenon front end? Seen some wild info about how to use angled steering blocks. For example 3 degrees positive camber on steering block and then changed eyelet turnbuckle length to achieve -1 camber at the wheel.

Any tips about xenon front and and experiences how to use angled steering blocks are more than welcome, before I decide to make a hole to my wallet
__________________
Destiny&V-Dezign 1:12- Sanwa M12s - Xray XB4 2016 - Xray XB2 - Team Orion R10.1 Pro & Sanwa Super Vortex Zero - Team Orion Vortex & Muchmore & Reedy BL motors - Sanwa servos
Peakki is offline   Reply With Quote
Old 08-14-2014, 07:39 AM   #41145
Tech Elite
 
howardcano's Avatar
 
Join Date: Jan 2012
Location: Olathe, KS
Posts: 3,280
Trader Rating: 35 (100%+)
Default

Quote:
Originally Posted by Peakki View Post
Thoughts about Xenon front end? Seen some wild info about how to use angled steering blocks. For example 3 degrees positive camber on steering block and then changed eyelet turnbuckle length to achieve -1 camber at the wheel.

Any tips about xenon front and and experiences how to use angled steering blocks are more than welcome, before I decide to make a hole to my wallet
Using knuckles with the holes for the kingpin and axle at some angle other than perpendicular lets you change the roll center without changing camber. Whether you find this useful or not is up to you!
__________________
Howard Cano
When race results are re-calculated using the IOF (Index Of Fun), I always win.
1993 ROAR 1/8 Pan National Champion
howardcano 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 09:20 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