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 06-03-2009, 11:17 AM   #31516
Suspended
 
Join Date: Jun 2009
Posts: 121
Default

Quote:
Originally Posted by SalvadoriRacing View Post
hey folks.......

this new battery make some serious power for new 1-cell addicteds

http://www.lrp.cc/en/products/vtec-b...c-74v/details/

despite of having to buy the 7.4v saddle pack, it should worth the try as it's a 4800 40C pack.........
Good websayt
Christopher13 is offline   Reply With Quote
Old 06-04-2009, 06:53 PM   #31517
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default simple comparison 4cell and 1s

just a simple comparison of 4cell vs 1s 17.5. our track is carpet and is fairly open with a couple of technical corners. also the loop is quite a ways around the track, so our mains laptimes will be a little off. the 4th row of each is the mains. for comparison, i was geared at a 91mm in 4cell and 103mm in 1s.

week 1 - 4 cell
Yang Lai 31 00:08:14.919 00:15.066 2 15.965
Yang Lai 31 00:08:12.589 00:15.462 9 15.889
Yang Lai 31 00:08:10.607 00:15.137 5 15.826
Yang Lai 30 00:08:00.966 00:15.061 4 16.032

week1 - 1 cell
Andrew Doherty 31 00:08:15.841 00:15.467 6 15.994
Andrew Doherty 31 00:08:11.146 00:15.510 10 15.843
Andrew Doherty 31 00:08:11.177 00:15.328 2 15.844
Andrew Doherty 29 00:08:06.401 00:15.298 2 16.772

week 2 - 1 cell
Yang Lai 31 00:08:08.307 00:15.382 13 15.751
Yang Lai 31 00:08:07.561 00:15.082 7 15.727
Yang Lai 00:00:00.000 00:00.000
Yang Lai 31 00:08:13.993 00:15.224 8 15.935

week2 - 1 cell
Andrew Doherty 31 00:08:10.354 00:15.421 2 15.817
Andrew Doherty 31 00:08:08.744 00:15.344 4 15.765
Andrew Doherty 31 00:08:08.281 00:15.219 2 15.750
Andrew Doherty 30 00:08:03.439 00:15.143 3 16.114
__________________
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 06-04-2009, 07:17 PM   #31518
Tech Champion
 
robk's Avatar
 
Join Date: Aug 2001
Location: Macho Business Donkey Wrestler
Posts: 7,402
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by wingman2 View Post
Oh, I forgot to ask, I am living here in the USA for a couple of years and have a question about the tyre additives used here. I bought a bottle of Paragon FX, but the some of the guys at the track are using Paragon Ground Effects. Could someone let me know the differance between them? The Ground Effects stuff seems a bit more smelly over the FX stuff but will both work equally well or should one be used over the other in certain situations? Many thanks, Chris.
Black can (ground Effects) is the best for carpet. Fx (white can) is good for asphalt, though I have heard the black can Paragon can be good in cooler temps?
__________________
A mutually re-enforcing cascade of failure

"Failior [sic] crowns enterprise." Robert Goddard

I-Lap Scoring Systems http://www.rclapcounter.com/
robk is offline   Reply With Quote
Old 06-04-2009, 08:17 PM   #31519
Tech Master
 
CarlosG.'s Avatar
 
Join Date: Jul 2004
Location: Falls City,TX
Posts: 1,145
Trader Rating: 12 (100%+)
Send a message via Yahoo to CarlosG.
Default

Yang, would it have been better to not of showed Andrew Doherty's time to compare your 4cell vs. his 1s. It seems to me the comparision would be better off between your own times 4cell vs. 1s, then show Andrews times for 4cell vs. 1s. Because it through me off showing your 4cell times vs. his 1s times.
CarlosG. is offline   Reply With Quote
Old 06-04-2009, 08:44 PM   #31520
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by CarlosG. View Post
Yang, would it have been better to not of showed Andrew Doherty's time to compare your 4cell vs. his 1s. It seems to me the comparision would be better off between your own times 4cell vs. 1s, then show Andrews times for 4cell vs. 1s. Because it through me off showing your 4cell times vs. his 1s times.
there are 2 reasons fo this carlos.
1. andew has not run 4 cells in about 2 months.
2. he is the control sample. for what you do carlos, think of it as a reference sample
__________________
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 06-04-2009, 09:05 PM   #31521
Tech Elite
 
andrewdoherty's Avatar
 
Join Date: Jan 2005
Location: ★Wylie, TX★
Posts: 3,763
Trader Rating: 47 (100%+)
Default

Yang, please don't forget to mention that your 4 cell runs were admittedly accomplished with a less than optimal set up on your car. I'd hate for people to get the idea that I can actually control a 12th scale!
__________________
"Whether you think you can, or think you can't, you're right." -Henry Ford
"[Driving] Genius is 1% inspiration, and 99% perspiration" -T.A. Edison
|◤Hobbywing◢|◤SpeedzoneUSA.com◢|◤Pro-One◢|
|◤ReflexRacing.net◢|◤Protoform◢|◤AVID R/C◢|
andrewdoherty is offline   Reply With Quote
Old 06-05-2009, 05:54 AM   #31522
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by andrewdoherty View Post
Yang, please don't forget to mention that your 4 cell runs were admittedly accomplished with a less than optimal set up on your car. I'd hate for people to get the idea that I can actually control a 12th scale!
actually, it was the setup i was runing for the last track. i had just rebuilt the car. but the track was definately more green on week 1. this was week 1 on the track. we had just finished putting down a new layout. but week 2 was the first time I ran the 1s lipo car in 17.5. i just finish the conversion the night before. i changed the front spring, side spring, center shock, center shock oil, and center spring. the front camber and caster were from my 4 cell setup. here is what i can admit. my 4 cell car was running 42mm rears. though they were not new, they were not chunked. my 1s car, i ran 40mm reas off my 13.5 car. and there was not an edge on either of the 2 wheels. also on my 1s car, i ran the speed8hd body and the 4cell, i ran the speed12. but you are right the car did not transition around the track as well as i would have liked with my 4 cell.

the tracktion was definately better on week 2. but that was part of why i included your time. you ran 1s both weekends and the car was basically the same, minus setup changes and etc. but you were my control parameter. your consistency both weeks made it much easier to see changes to the track from week to week.

quite a few changes, but hey that is all I got. since we have adopted the roar rules for 1/12th. there really is not a reason for me to run 4 cell anymore.
__________________
yang lai

Team Tamale | Team Tekin | RCAmerica | Speedmerchant | Speedzone RC | EA Motorsports | Ko Propo USA | eXpress Motorsports | Parma/PSE

Last edited by theisgroup; 06-05-2009 at 06:05 AM.
theisgroup is offline   Reply With Quote
Old 06-05-2009, 11:11 AM   #31523
Tech Master
 
racer x 1's Avatar
 
Join Date: Dec 2003
Location: im 4rm a far away place called 1st
Posts: 1,820
Trader Rating: 27 (100%+)
Default

i need help guys im looking for a good rollout running a novak gtb/10.5 and the track is 73x73. its carpet flowing and has a few hairpins. thanks in advance guys.
__________________
Matt Bell
Mugen MRX5 Ae R5.2 X6^3 M11x All powered by Speedtech Rc
racer x 1 is offline   Reply With Quote
Old 06-05-2009, 07:18 PM   #31524
Tech Master
 
wingman2's Avatar
 
Join Date: Dec 2005
Location: Tewkesbury, UK via Plymouth, UK.
Posts: 1,259
Default

Thanks RobK.
wingman2 is offline   Reply With Quote
Old 06-05-2009, 10:17 PM   #31525
Tech Elite
 
PutAwayWet's Avatar
 
Join Date: Apr 2007
Location: Seattle, WA
Posts: 2,294
Trader Rating: 1 (100%+)
Default

T-Fource, lipo, balanced, 735g. Racing tomorrow. Giddayup.
Attached Thumbnails
1/12 forum-lipo-t-fource.jpg  
__________________
Todd Mason
Seattle RC Racers

The world ends when you're dead. Until then, you got more punishment in store.
Stand it like a man, and give some back. --Al Swearengen
PutAwayWet is offline   Reply With Quote
Old 06-05-2009, 10:19 PM   #31526
Tech Master
 
busman's Avatar
 
Join Date: Feb 2003
Location: Enumclaw, Washington
Posts: 1,434
Default

Quote:
Originally Posted by PutAwayWet View Post
T-Fource, lipo, balanced, 735g. Racing tomorrow. Giddayup.
Where?
__________________
But, Is it farther to Seattle or by Bus??????
Be obsequious as opposed to obtuse
The more Government expands, The more Freedom contracts!!
busman is offline   Reply With Quote
Old 06-06-2009, 09:12 AM   #31527
Tech Prophet
 
Randy Caster's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2003
Location: Irvine, CA
Posts: 16,665
Trader Rating: 45 (100%+)
Default

Hey guys, looking for some help here, having problem with the sauce wearing off the tires too soon. I can average about 9.5 second laptimes for the first 3 mins of a run, then it drops down to about 10.0's for the next minute, but by about 4 and a half mins into the run it seems like the sauce is completely worn off and the car is literally un-driveable.

I've tried saucing for short amounts of time, long amounts of time (up to an hour), and all the way from 1/3 of the front, to the full thing.

The tires aren't coming off the track caked in carpet fibers, really they are usually very clean at the end of a run.

I'm running pink tires all around, 43mm front, 45.5 rear, and our track only allows jack the gripper.

Any ideas on how I can get some more runtime out of the tires?

Thanks!
Randy Caster is offline   Reply With Quote
Old 06-06-2009, 10:19 AM   #31528
Tech Elite
 
Slapmaster6000's Avatar
 
Join Date: Sep 2004
Location: Edmonds, Wash.
Posts: 2,947
Trader Rating: 14 (100%+)
Default

Randy, that is a Jack trait. Try lilac/pink or 2pink/yellow but most importantly CA the fronts. You will have to sauce about 15 minutes, full rears, 50% front and go from there. Clean the tires every run. You'll be golden!
Brian
__________________
Stay dialed my friends!
www.slapmastertools.com
Team Roche USA
Team Orca orcharc.com
Slapmaster6000 is offline   Reply With Quote
Old 06-06-2009, 10:24 AM   #31529
Tech Elite
 
Slapmaster6000's Avatar
 
Join Date: Sep 2004
Location: Edmonds, Wash.
Posts: 2,947
Trader Rating: 14 (100%+)
Default

Oh, we had a classic epic battle the other night between 4c & 1c with 13.5's. With the exception the the 4c car got hung up a few minutes into the race, it was virtually equal with the tiniest advantage going to the 1c car. The 4c car weighed in at 865g while the 1c was at 730g. The 1c was lighter on it's toes through the corners. Tire wear is down 40%. Once the dust settles, 1c will be the most cost effective class out there. The 1c car won by a lap.
Brian
__________________
Stay dialed my friends!
www.slapmastertools.com
Team Roche USA
Team Orca orcharc.com
Slapmaster6000 is offline   Reply With Quote
Old 06-06-2009, 11:36 AM   #31530
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

randy, you guys spraying the track? what do your tires look like after a run? ae they glazing?
__________________
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: 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 05:29 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