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 10-20-2006, 08:34 PM   #21391
Tech Champion
 
Scottrik's Avatar
 
Join Date: Sep 2004
Location: Billings, MT
Posts: 6,123
Trader Rating: 239 (100%+)
Default

Quote:
Originally Posted by Quante
And for different side springs, tampering with my rear end is something I'd like to avoid because the rear end is pretty much dialed and its the front which loses grip after some runtime. But If everything else fails, rear end adjustments must be made ;-) )
Keep in mind that the two are not completely independent of each other. Not enough grip at the front can just as easily (sometimes MORE easily) be a symptom of too much rear grip as it is anything to do with the front.

I'd say try the front purples/more sauce first too, but don't close your mind to changing your "dialed" rear--it may be less dialed than you think.

Scottrik
Scottrik is offline   Reply With Quote
Old 10-21-2006, 05:13 AM   #21392
Registered User
 
tomlau's Avatar
 
Join Date: Aug 2004
Posts: 40
Default

Hi,

Can anyone tell me what rate to charge a 120mAh RX pack?

Also, how much do these drain after an 8min run (bearing in mind im running a digital servo) , and how long will it take to re-peak after that?

thanks

tom
tomlau is offline   Reply With Quote
Old 10-21-2006, 09:38 AM   #21393
Tech Elite
 
Mr. Shookie's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2004
Location: The Wilderness
Posts: 4,713
Trader Rating: 9 (100%+)
Send a message via AIM to Mr. Shookie Send a message via MSN to Mr. Shookie
Default

Quote:
Originally Posted by tomlau
Hi,

Can anyone tell me what rate to charge a 120mAh RX pack?

Also, how much do these drain after an 8min run (bearing in mind im running a digital servo) , and how long will it take to re-peak after that?

thanks

tom
At which charge rate........ (0.12amp) or (.1amp)

I think it shoudl last you about 10-12 minutes of run..

I use a 250mah lipo that lasts for ever cause of the regulator...

Hope that helps,
-Shookie <><
__________________
All who love the LORD JESUS I praise with you.1 Cor 10:31
Team HOLY Rollers (Team Manager)
The Church is a Hospital for Sinners not a Museum for Saints.
RcTech Feedback <>< RC Tech Subcriber #92
Mr. Shookie is offline   Reply With Quote
Old 10-21-2006, 04:35 PM   #21394
Tech Initiate
 
Join Date: Oct 2005
Posts: 49
Default

What does everyone consider a competitive ESC for 12th, would that be a Quantum 2, Novak GTX, or other?


Thanks
Fast Faisal
Fast Faisal is offline   Reply With Quote
Old 10-21-2006, 04:54 PM   #21395
Tech Champion
 
Scottrik's Avatar
 
Join Date: Sep 2004
Location: Billings, MT
Posts: 6,123
Trader Rating: 239 (100%+)
Default

The QC2 is an excellent choice. Very small, no motor limit.

The KO VFS programmables are great too. Like the LRP the servo footprints are very small.

I'm not big on the GTX as the footprint is bigger. In 19-turn and stock I've gone to the KO (in fact I still have a QC2 to sell in EXCELLENT condition). In mod I use a GTB (wish the footprint were somaller)/Velociti set-up.

Scottrik
Scottrik is offline   Reply With Quote
Old 10-21-2006, 04:58 PM   #21396
Tech Champion
 
rayhuang's Avatar
 
Join Date: Dec 2001
Location: Cleveland Heights, Ohio
Posts: 6,511
Trader Rating: 5 (100%+)
Send a message via AIM to rayhuang
Default

Quote:
Originally Posted by Fast Faisal
What does everyone consider a competitive ESC for 12th, would that be a Quantum 2, Novak GTX, or other?


Thanks
Fast Faisal

A new player is MRT (Model Racing Technology). I am testing one right now and so far am very pleased. It feels punchy and doesnt give-up top end either. It has a cap-but its small. IT also has the convenince of being able to be mounted very easily with the program button on the top and big solder posts (not holes in a board). They have their own thread in the electric onraod section if you want to check it out.

Ray

Last edited by rayhuang; 10-21-2006 at 06:29 PM.
rayhuang is offline   Reply With Quote
Old 10-21-2006, 05:01 PM   #21397
Tech Champion
 
Jon Kerr's Avatar
 
Join Date: Jul 2002
Location: San Diego
Posts: 9,658
Trader Rating: 17 (100%+)
Default

Anyone know what tires come in the CRC 3.2R kit? I can't find anything anywhere saying what tires they are and there's no marks on the wheels.
Jon Kerr is offline   Reply With Quote
Old 10-21-2006, 05:04 PM   #21398
Tech Champion
 
Korey Harbke's Avatar
 
Join Date: Oct 2002
Location: Redmond, WA
Posts: 6,053
Trader Rating: 13 (100%+)
Default

Purple front, and Grey Rear
__________________
Pro Spec America/Apex RC - Team ORCA - Awesomatix USA - Roche RC USA - AVID - Sweep - Protoform - Pro-One RC - Slapmaster Tools - Hebiki Design Works - Turtlemaster Racing - Seattle RC Racers - Timezone Hobbies
Korey Harbke is offline   Reply With Quote
Old 10-21-2006, 05:09 PM   #21399
Tech Elite
 
GrandeGixxer's Avatar
 
Join Date: Jun 2004
Location: Waldorf, MD
Posts: 2,410
Trader Rating: 10 (100%+)
Default

Scottrik, how many QC2's did you have?
GrandeGixxer is offline   Reply With Quote
Old 10-21-2006, 06:21 PM   #21400
Tech Champion
 
Scottrik's Avatar
 
Join Date: Sep 2004
Location: Billings, MT
Posts: 6,123
Trader Rating: 239 (100%+)
Default

Quote:
Originally Posted by GrandeGixxer
Scottrik, how many QC2's did you have?
At one time...five of 'em. Bought them all at one time too, an expensive afternoon to say the least. I think I covered a semester of Randon Stormer's school though.

One died a grim death (apparently), sold my 1/12 race unit and both my backups (thanks in part to you). Have my TC race unit left. Oh, and three KO VFS comps now.

Scottrik
Scottrik is offline   Reply With Quote
Old 10-21-2006, 06:23 PM   #21401
Tech Champion
 
Scottrik's Avatar
 
Join Date: Sep 2004
Location: Billings, MT
Posts: 6,123
Trader Rating: 239 (100%+)
Default

Quote:
Originally Posted by Jon Kerr
Anyone know what tires come in the CRC 3.2R kit? I can't find anything anywhere saying what tires they are and there's no marks on the wheels.
Unless something has changed, and I doubt it has, you'll have grey rears and purple fronts.

Scottrik
Scottrik is offline   Reply With Quote
Old 10-21-2006, 08:39 PM   #21402
Tech Master
 
David Galdo's Avatar
 
Join Date: Aug 2001
Location: Euless, TX
Posts: 1,652
Trader Rating: 15 (100%+)
Send a message via ICQ to David Galdo Send a message via AIM to David Galdo Send a message via MSN to David Galdo Send a message via Yahoo to David Galdo
Default

Put together a version of the Slapmaster thrust bearing and I'm impressed with it. The thrust bearing itself cost me $1.50 as I already had the other (similar) pieces to the puzzle. I will see how it all works out. Great idea this kit is.
__________________
Hot Bodies | HPI Racing | HPI TV | Speedzone USA | Team Epic | Trinity | TRC
V-Dezign 4.0
David Galdo is offline   Reply With Quote
Old 10-21-2006, 08:43 PM   #21403
Team EAM
 
EAMotorsports's Avatar
 
Join Date: Dec 2001
Location: Murfreesboro, TN
Posts: 8,864
Trader Rating: 74 (100%+)
Send a message via AIM to EAMotorsports
Default

Well I put my Slapmaster diff kit in the 12th scale today for its maiden voyage (by me at least) and it worked awesome!! I had several RR impacts with the wall (1st time in years running 12th) and even broke the compete center out of a RR wheel and the diff is still perfect!!

Very happy and worth every penny of 25.00!!

EA
__________________
Contact Us
Team EAM, Our Facebook
Xray | RCAmerica | Hudy | Apex RC | ProSpec America | Killer Concepts | AVID | Futaba.
EAMotorsports is offline   Reply With Quote
Old 10-21-2006, 08:51 PM   #21404
Tech Master
 
David Galdo's Avatar
 
Join Date: Aug 2001
Location: Euless, TX
Posts: 1,652
Trader Rating: 15 (100%+)
Send a message via ICQ to David Galdo Send a message via AIM to David Galdo Send a message via MSN to David Galdo Send a message via Yahoo to David Galdo
Default

You hitting and breaking something, not true!
__________________
Hot Bodies | HPI Racing | HPI TV | Speedzone USA | Team Epic | Trinity | TRC
V-Dezign 4.0
David Galdo is offline   Reply With Quote
Old 10-21-2006, 08:51 PM   #21405
Tech Champion
 
Jon Kerr's Avatar
 
Join Date: Jul 2002
Location: San Diego
Posts: 9,658
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by Sushi Boy
Purple front, and Grey Rear
Thanks Korey.
Jon Kerr 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 01:03 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