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 06-19-2002, 10:46 AM   #1036
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

Shrek- Not sure on the Trinity to CRC change for the front end. I think you have to drill four new holes but that may make the front of the chassis plate pretty weak due to the proximity of the new holes to the original holes.

DaveL- Nice insights. I didn't know what Masami had used for fronts. Concerning the Jaco 35's I agree about whether the rest of us can get them. Maybe now that Jaco is seperate from Proline these may become available to the general public.
Do you think that the "35's" that Masami used on the rear stand for the shore number thus making them magentas and if so who do you think he got them from or do you think Yokomo actually made them? On the Corrally front I just took a look at the picture from the Worlds and from what I can see the differences look like thus:

1. CRC Type Aluminum Side Damper Tubes
2. Revised Motor Pod Top Plate
3. Associated VSC center shock
4. Using their tweak system

I would venture to say that these changes probably helped give more turn-in and mid-corner steering along with better and more consistent forward traction. What do you guys think? If the bite came up to similar standards as Speedworld's was at last summers Roar Outdoor Nats then it would be close to carpet according to the info I got from Jucha. The Worlds report said that they sugar watered the track and it made the grip really high(for them I bet, hehehe). Jucha said that last summers Outdoor Nats and Speedworld was so high in traction that it actually came close to carpet but he may have forgotten the different tire traction application used for asphalt. Namely the use of Suntan lotion initially for 25min or so and then Paragon on top of that for another 10-15min before you wipe all of the residue off. I think this traction compound application gives more traction on asphalt than straight Paragon and I would think many at the Worlds were doing something similar.
darnold is offline   Reply With Quote
Old 06-19-2002, 09:23 PM   #1037
Tech Adept
 
Avink1's Avatar
 
Join Date: May 2002
Location: Coon Rapids, MN
Posts: 159
Send a message via AIM to Avink1
Default

shrek, the Trinity front end will fit but you have to drill holes. use the front hole from the AE front end and drill the new holes for the Trinity front end. I haven't had any problems with the chassis plate bein too weak, I have the holes for both front ends. Personally I like the AE front end better, but the Trinity is more adjustable. I have parts to the trinity front end if you need them, I just have to look for them.
Avink1 is offline   Reply With Quote
Old 06-19-2002, 11:00 PM   #1038
Tech Fanatic
 
shrekair's Avatar
 
Join Date: Mar 2002
Posts: 946
Trader Rating: 9 (91%+)
Default

thanks
shrekair is offline   Reply With Quote
Old 06-21-2002, 11:47 AM   #1039
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

Shrek- I think you will really like the Trinity front end once you get used to it. It has a little higher learning curve because you can readily adjust roll center and camber gain compared to the Associated. The Associated front end is more straight forward with its caster and camber settings and therefore easier up front to adjust.
The Trinity front end is more durable and consistent due to its extra rigidity and I think that adds up to greater performance and less maintenance. The nice thing is that you wil be able to test both and see which one you like best.
darnold is offline   Reply With Quote
Old 06-22-2002, 11:50 PM   #1040
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

So has anyone figured out how much support equipment they need for the 12th scale indoor season? When I say support equipment I mean things such as diff rings and diff balls, tires, bodies, bearings, front springs, T-bars, damper lube, damper disks, spare graphite parts, etc.
darnold is offline   Reply With Quote
Old 06-23-2002, 09:50 PM   #1041
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

up^^^
darnold is offline   Reply With Quote
Old 06-23-2002, 10:25 PM   #1042
Tech Fanatic
 
shrekair's Avatar
 
Join Date: Mar 2002
Posts: 946
Trader Rating: 9 (91%+)
Default

so many cars, so little time
shrekair is offline   Reply With Quote
Old 06-24-2002, 05:43 PM   #1043
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

May get to race this weekend....been almost 2 months since i've raced......SUCKS got a KNIFE just waiting for some abuse...not from me of course...the other HACKS....lol
Dragon Slayer is offline   Reply With Quote
Old 06-24-2002, 07:11 PM   #1044
Tech Master
 
newracer's Avatar
R/C Tech Charter Subscriber
 
Join Date: Oct 2001
Location: Ft. Collins, Colorado
Posts: 1,523
Default

good news for me....since I've been dominating the pan car class at my local track with my 1/12th, more people are going to start racing them, hopefully we will get a 1/12th only class!
newracer is offline   Reply With Quote
Old 06-24-2002, 08:04 PM   #1045
Tech Fanatic
 
darnold's Avatar
 
Join Date: Feb 2002
Location: Bolingbrook, IL
Posts: 906
Trader Rating: 2 (100%+)
Default

NewRacer- Excellent!!!
DS- How are you doing?
Shrek- Just make sure you race the 12th scaler. LOL
darnold is offline   Reply With Quote
Old 06-24-2002, 08:20 PM   #1046
Tech Regular
 
Dragon Slayer's Avatar
 
Join Date: Sep 2001
Location: tx
Posts: 358
Send a message via Yahoo to Dragon Slayer
Default

Darnold....other than not getting to race....not too bad....prolly this weekend!
Dragon Slayer is offline   Reply With Quote
Old 06-24-2002, 09:51 PM   #1047
Tech Master
 
jason cheng's Avatar
 
Join Date: Mar 2002
Posts: 1,937
Trader Rating: 37 (100%+)
Smile

dave arnold hi any racing in chicago? carpet
jason cheng is offline   Reply With Quote
Old 06-25-2002, 04:13 PM   #1048
Tech Champion
 
Kevin K's Avatar
 
Join Date: Aug 2001
Location: In a land of mini-mighty mental giants
Posts: 8,754
Trader Rating: 32 (100%+)
Send a message via AIM to Kevin K Send a message via Yahoo to Kevin K
Default

Hey its nice that Darnold can take time outa his day showing Tiger Woods how to putt and stop by here and offer his help to us all. Hes one heck of a guy we should all thank him and ask him for Tigers autograph as well.

BTW if ya think Im causing trouble you ant seen nutin yet....

Anyway I dont know what 12th scaler to get for this year I might get a CRC 6 pack I dont know. See ya on the LINKS.......
__________________
2013 USVTA World Champion of the World
MOTIV RC presents the Midwest All-Star Carpet Series....14th year running 2016/17!!!
USVTA National Championship....check it out!!!
Im only responsible for what I say NOT what you understand.
Kevin K is offline   Reply With Quote
Old 06-25-2002, 11:39 PM   #1049
Tech Fanatic
 
shrekair's Avatar
 
Join Date: Mar 2002
Posts: 946
Trader Rating: 9 (91%+)
Default

i may actually sell my 1/12 scale but its for the best seeing as i have 4 sedans. so who knows. its a all blue crc carpet knife v3.1. brand new custom painted body w/ servo. 2 full sets of tires. but in the mean time i'll race it a couple times to keep it up to par. how have you guys been running in general? anyone tq'ing and laying the smack down at their club races, just like dave arnold?
shrekair is offline   Reply With Quote
Old 06-26-2002, 12:43 PM   #1050
Tech Adept
 
Avink1's Avatar
 
Join Date: May 2002
Location: Coon Rapids, MN
Posts: 159
Send a message via AIM to Avink1
Default

shrek, there hasn't been much for 12th scale racing lately. We have been getting 3 or 4 cars and thats it.
Avink1 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: 3 (0 members and 3 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 03:30 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