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 12-30-2009, 07:10 AM   #33061
Tech Champion
 
Scottrik's Avatar
 
Join Date: Sep 2004
Location: Billings, MT
Posts: 6,123
Trader Rating: 239 (100%+)
Default

Quote:
Originally Posted by theisgroup View Post
you guys running jack or paragon?
...or something good?
__________________
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 12-30-2009, 07:14 AM   #33062
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by Scottrik View Post
...or something good?
__________________
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 12-30-2009, 07:40 AM   #33063
Tech Master
 
jkirkwood's Avatar
 
Join Date: Feb 2007
Posts: 1,223
Trader Rating: 8 (100%+)
Default

A mixture of Jack and Sticky fingers. 90% sticky fingers now.
__________________
SMC Racing | AKA Products | Serpent America | Android Nitro Runtime Calculator
jkirkwood is offline   Reply With Quote
Old 12-30-2009, 07:42 AM   #33064
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by jkirkwood View Post
A mixture of Jack and Sticky fingers. 90% sticky fingers now.
isn't sticky fingers, jack with a different name?
__________________
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 12-30-2009, 11:17 AM   #33065
avs
Tech Master
 
avs's Avatar
 
Join Date: Jul 2006
Posts: 1,144
Trader Rating: 2 (100%+)
Default extra high bite asphalt

hi all,
i was looking for setup suggestions for a very high grip asphalt condition (no vht, but very high bite)

for a short time there was a carpet track in my area and got a few months experience with 1/12 racing. but it closed and now the same people are trying to run at an indoor asphalt track.

it has as much or more grip than the carpet did (but with harder borders ouch) the basic carpet setup has been hard to improve on.

so far i have struggled to try to get any std rubber to work.
with anything but black/grey the traction is very nonlinear with slip angle. so the tire (front) tends to have a very sharp break at the limit.

should i just give up on the long wear rubber for high grip asphalt?

thanks in advance for other's experience on this.
__________________
Tony Shimko
avs is offline   Reply With Quote
Old 12-30-2009, 12:40 PM   #33066
Tech Addict
 
gubbs3's Avatar
 
Join Date: Aug 2006
Location: MN
Posts: 599
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by jkirkwood View Post
Last night our track grip spiked up higher than it has for the past 6 mo of racing due to Brandini run foam touring for the past 3 nights on it. LOL

My 1/12th was really off. I would start off with a push and and through the run the car got more and more steering to the point the car would hook steer around the 5 min mark. Is this symptom usually due to improper tire compound selection for the conditions or setup issues elsewhere? I was using lilac front pink rear.
Its probably a setup issue that has developed from improper tire selection. In 1s mod around here, many of us have moved to lilac/magenta. I have tried pink rears but I find that they are way too sticky to work with the lilac front tires. The problem might be that to compensate for the lack of front grip you have setup the chassis to be very aggressive. When you do this, the rear tires will get overworked and lose grip toward the end of the run.

I would recommend two things:

Run magenta rears to free up the car a little and dial out some front grip to keep it from hooking.

or

Try double pink fronts to cure the push at the start and then also dial out front grip to keep the car from being too twitchy.

For me, I can usually run faster laps with double pink/pink than with lilac/magenta. However, the lilac/magenta is very smooth and easy to drive and, at least for me, very consistent over the full 8 minutes.
gubbs3 is offline   Reply With Quote
Old 12-30-2009, 01:33 PM   #33067
Tech Master
 
jkirkwood's Avatar
 
Join Date: Feb 2007
Posts: 1,223
Trader Rating: 8 (100%+)
Default

Thanks for the response. I have all those combination of tires so I'll give them a whirl.
__________________
SMC Racing | AKA Products | Serpent America | Android Nitro Runtime Calculator
jkirkwood is offline   Reply With Quote
Old 01-01-2010, 01:27 AM   #33068
Tech Master
 
mikecatts's Avatar
 
Join Date: Feb 2004
Posts: 1,274
Trader Rating: 18 (95%+)
Default Rs-pro 10.5 rollout

...
__________________
http://smg.photobucket.com/albums/v223/mikecatts/

Last edited by mikecatts; 06-21-2011 at 07:42 PM.
mikecatts is offline   Reply With Quote
Old 01-01-2010, 01:54 AM   #33069
oze
Tech Adept
 
Join Date: Sep 2005
Location: Budapest, Hungary
Posts: 142
Default

What is your motor temperature after 3-4 minutes of run? Should be around 70-80 C. If it is colder, you have to put bigger pinion on. Your roll out looks pretty low. Should be around 65-70 mm.
After you set your in-field speed (with boost timing and gearing) you can set turbo. First set high turbo delay and decrease it step by step.
oze is offline   Reply With Quote
Old 01-01-2010, 02:44 AM   #33070
Tech Regular
 
Join Date: Aug 2007
Posts: 399
Default Indoor carpet tracks in florida Orlando area

Arriving in Orlando for the Birds 5 days early, any permant tracks open where you can turn up pay a fee and practice.
Or any clubs in the area that race at weekends.

I race 1/12th.Speed merchant.
tellan is offline   Reply With Quote
Old 01-01-2010, 06:18 AM   #33071
Tech Master
 
Drillit's Avatar
 
Join Date: Sep 2007
Location: Oreganastan Pacific Wonderland home to Indoor Farming
Posts: 1,059
Default

Quote:
Originally Posted by mikecatts View Post
Hi all..
Im wanting to know a good starting point for a1/12 using a single cell lipo, 10.5 RS-Pro start roll out..
I think im over geared at
58.26..(48mm tyre 34/88 64pitch) = 2.59 ratio
The turbo dosent seem to kick in..
any help would be nice..
Mike
Don't me have you tried here.......
Tekin RS/RS PRO on 1s Lipo Q&A I jumped the tone a little maybe. just didn't get a 12th RS user to answer yet........
__________________
Mark Tilley
Got T-Bar ? ......... Oregons No ZigZag rule sucks
Bias the weight to the end you want to hit the wall with first!
Searchin fer answers in the Fog.......that's what I found

Last edited by Drillit; 01-01-2010 at 06:26 AM. Reason: haste makes multiple thread posts
Drillit is offline   Reply With Quote
Old 01-01-2010, 12:03 PM   #33072
Tech Addict
 
Mugen10's Avatar
 
Join Date: Feb 2009
Location: Lexington, KY
Posts: 551
Trader Rating: 9 (100%+)
Send a message via Yahoo to Mugen10 Send a message via Skype™ to Mugen10
Default

Quote:
Originally Posted by gubbs3 View Post
Its probably a setup issue that has developed from improper tire selection. In 1s mod around here, many of us have moved to lilac/magenta. I have tried pink rears but I find that they are way too sticky to work with the lilac front tires. The problem might be that to compensate for the lack of front grip you have setup the chassis to be very aggressive. When you do this, the rear tires will get overworked and lose grip toward the end of the run.

I would recommend two things:

Run magenta rears to free up the car a little and dial out some front grip to keep it from hooking.

or

Try double pink fronts to cure the push at the start and then also dial out front grip to keep the car from being too twitchy.

For me, I can usually run faster laps with double pink/pink than with lilac/magenta. However, the lilac/magenta is very smooth and easy to drive and, at least for me, very consistent over the full 8 minutes.
I think the purple and pink combo works really well. I am saucing a little less then half the front and has lots of turn in and exit.
__________________
Central Kentucky Racing
$$$$$$$$$$$$$$$$$$$
Xray T4
Mugen10 is offline   Reply With Quote
Old 01-02-2010, 07:27 AM   #33073
Tech Addict
 
georgec's Avatar
 
Join Date: Jul 2009
Location: TN
Posts: 624
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by tellan View Post
Arriving in Orlando for the Birds 5 days early, any permant tracks open where you can turn up pay a fee and practice.
Or any clubs in the area that race at weekends.

I race 1/12th.Speed merchant.
I just returned from the west coast of FL (Tampa/Clearwater) staying at my outlaws for the holidays. To break the boredom I brought my CRC GenX with me and after spending half a day calling LHS,tracks,clubs I don't think there is a carpet track in the state of FL. One must remember that a good percentage of the population of FL consists of angry transplanted geezers with lots of golf clubs

Last edited by georgec; 01-02-2010 at 07:43 AM.
georgec is offline   Reply With Quote
Old 01-02-2010, 06:15 PM   #33074
Tech Addict
 
bfong13's Avatar
 
Join Date: Aug 2009
Location: San Antonio, TX
Posts: 611
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by tellan View Post
Arriving in Orlando for the Birds 5 days early, any permant tracks open where you can turn up pay a fee and practice.
Or any clubs in the area that race at weekends.

I race 1/12th.Speed merchant.


This is the only carpet track that I know of. It is on the west coast near Tampa.

http://fseara.com/clubs-and-tracks/minnreg

http://rcactionpics.com/gallery/2009/07_18_2009/
bfong13 is offline   Reply With Quote
Old 01-02-2010, 07:32 PM   #33075
Tech Master
 
jkirkwood's Avatar
 
Join Date: Feb 2007
Posts: 1,223
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by gubbs3 View Post
Its probably a setup issue that has developed from improper tire selection. In 1s mod around here, many of us have moved to lilac/magenta. I have tried pink rears but I find that they are way too sticky to work with the lilac front tires. The problem might be that to compensate for the lack of front grip you have setup the chassis to be very aggressive. When you do this, the rear tires will get overworked and lose grip toward the end of the run.

I would recommend two things:

Run magenta rears to free up the car a little and dial out some front grip to keep it from hooking.

or

Try double pink fronts to cure the push at the start and then also dial out front grip to keep the car from being too twitchy.

For me, I can usually run faster laps with double pink/pink than with lilac/magenta. However, the lilac/magenta is very smooth and easy to drive and, at least for me, very consistent over the full 8 minutes.
I ended up taking out allot of front caster and thickened the fluid on my front kingpins (20k to 30k). Tried magenta fronts with pink and yellow rears. Also tried double pink/pink. I settled on magenta/yellow for 17.5 today but magenta/pink felt really good too. I didn't have any magenta rears to try lilac/magenta.

Thanks for the help.
__________________
SMC Racing | AKA Products | Serpent America | Android Nitro Runtime Calculator
jkirkwood 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 10:08 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