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 01-20-2006, 05:20 PM   #16951
Tech Master
 
dakrat's Avatar
 
Join Date: Nov 2004
Location: 96th ABW
Posts: 1,581
Default

looks like he put it in front of a car @ straightaway in modified class
dakrat is offline   Reply With Quote
Old 01-20-2006, 06:08 PM   #16952
Tech Adept
 
Join Date: Oct 2001
Location: Auckland, New Zealand
Posts: 148
Send a message via ICQ to Seano
Default

Quote:
Originally Posted by Scottrik
Put in front of WHAT...a Buick on the 405???!!! That's ugly.

Scottrik
Believe it or not it was put (by a marshall) in front of another 1/12th which was pretty much at full noise. I knew it had broken the car but i didn't expect that

Does anyone know if the AE bottom pod plate will fit? Won't need to pay for shipping from CRC then as I can get it locally.
Seano is offline   Reply With Quote
Old 01-20-2006, 06:28 PM   #16953
Tech Regular
 
Join Date: Oct 2003
Posts: 373
Default

I have an L4 in my hand now, the lower pod plate looks like the same, I bet the AE one will fit.
caveman is offline   Reply With Quote
Old 01-20-2006, 06:30 PM   #16954
Tech Regular
 
Ntensweapon's Avatar
 
Join Date: Dec 2002
Location: iowizza
Posts: 269
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by fpart
Does anyone know if there is a someone who makes an aftermarket chassis for the Trinity Black Widow? Im looking for one that is stiffer.

I actually have designed a black widow conversion with a thick chassis. with the help of Doug Powell @ prc it now lives. right now i only have one but i should be getting some in soon. email me for more details if you'd like.
tomnmel2@msn.com
Ntensweapon is offline   Reply With Quote
Old 01-20-2006, 07:03 PM   #16955
Tech Regular
 
Ntensweapon's Avatar
 
Join Date: Dec 2002
Location: iowizza
Posts: 269
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by DPowell
Send Ntensweapon a PM or e-mail. He will have some information on a BW conversion that may be what you are looking for.

D.P.

Thanks alot Doug. i have been "snoozing" lately. haven't checked on this thread in a while.

what started out as a bunch of very rough drawings is now working reality. the GIANTKILLER 12. thanks to Doug @PRC for the knowledge and graphite cutting.
all in all i thought the Black Widow was pretty good. but i was unhappy with a few things. i found the graphite to be too thin and brittle. the design of the car exagerated this. i didn't like the battery position. i know why they did it that way, but my gut told me it was unnecessary for stock and 19t. i also didn't think it was fitting to have a trinity car without the dieter style front end. i didn't like the tubes.and i also thought the car was a little long.
so what i came up with was.
3mm high quality chassis/bottom plate
cells run front to back with extra large openings for movement
shortened wheelbase
associated and trinity/deiter front end mounting holes
crc style tubes
the car is in early testing. i am very pleased so far. the tubes on my car i made myself..i am currently working with a machinist to run some copies. also possibly yet to come are scribe lines in the chassis for battery position.
Ntensweapon is offline   Reply With Quote
Old 01-20-2006, 07:09 PM   #16956
Tech Regular
 
Ntensweapon's Avatar
 
Join Date: Dec 2002
Location: iowizza
Posts: 269
Trader Rating: 1 (100%+)
Default

pic to large. i'll try again
Ntensweapon is offline   Reply With Quote
Old 01-20-2006, 07:17 PM   #16957
Tech Adept
 
Join Date: Oct 2001
Location: Auckland, New Zealand
Posts: 148
Send a message via ICQ to Seano
Default

Quote:
Originally Posted by caveman
I have an L4 in my hand now, the lower pod plate looks like the same, I bet the AE one will fit.
Thanks
Seano is offline   Reply With Quote
Old 01-20-2006, 07:23 PM   #16958
Tech Master
 
Join Date: Jan 2005
Posts: 1,625
Trader Rating: 36 (100%+)
Default

The AE lower pod plate works, my son uses one on his T-Fource.
EVILGRAFX is offline   Reply With Quote
Old 01-20-2006, 07:39 PM   #16959
Tech Adept
 
Join Date: Oct 2001
Location: Auckland, New Zealand
Posts: 148
Send a message via ICQ to Seano
Default

Quote:
Originally Posted by EVILGRAFX
The AE lower pod plate works, my son uses one on his T-Fource.
Cool, thanks for that
Seano is offline   Reply With Quote
Old 01-20-2006, 07:40 PM   #16960
Tech Regular
 
Ntensweapon's Avatar
 
Join Date: Dec 2002
Location: iowizza
Posts: 269
Trader Rating: 1 (100%+)
Default

this time maybe?
Attached Thumbnails
1/12 forum-gk12.jpg  
Ntensweapon is offline   Reply With Quote
Old 01-20-2006, 08:17 PM   #16961
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

hey guys,

i am putting together one of the actual first BMI DB12 1/12th cars.this is the display model for the snowbirds this year.i wanted to post some pics of it for you guys to see.i stillhave some more assembly but i was really excited and couldnt wait this car kit is going to have a street price of about $200.00.i will post some pics of the finished assembly when i finish.thanks for looking.
Attached Thumbnails
1/12 forum-db1.jpg   1/12 forum-db2.jpg  
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 01-20-2006, 08:36 PM   #16962
Tech Master
 
Scott S's Avatar
 
Join Date: Oct 2004
Location: New York
Posts: 1,314
Trader Rating: 30 (100%+)
Default

Quote:
Originally Posted by protc3
hey guys,

i am putting together one of the actual first BMI DB12 1/12th cars.this is the display model for the snowbirds this year.i wanted to post some pics of it for you guys to see.i stillhave some more assembly but i was really excited and couldnt wait this car kit is going to have a street price of about $200.00.i will post some pics of the finished assembly when i finish.thanks for looking.
Blueee I'd buy it just because it's so blue.
__________________
Xray T2 007 | Xray T2 | CRC 3.2R | CRC Gen X
Willis Hobbies | 360 RC Speedway & Hobbies | LIR
Scott S is offline   Reply With Quote
Old 01-20-2006, 08:45 PM   #16963
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

thanks buddy.the kit is going to be coming with a top pod plate for the use of damper tubes also.shortly after the release of the car i will be releasing a set of damper tubes.when i finish the assembly i will post more detailed pics and more info on the car.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 01-20-2006, 09:05 PM   #16964
TFR
Tech Master
 
TFR's Avatar
 
Join Date: Aug 2001
Location: Toronto
Posts: 1,767
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by protc3
hey guys,

i am putting together one of the actual first BMI DB12 1/12th cars.this is the display model for the snowbirds this year.i wanted to post some pics of it for you guys to see.i stillhave some more assembly but i was really excited and couldnt wait this car kit is going to have a street price of about $200.00.i will post some pics of the finished assembly when i finish.thanks for looking.
When is the release date? The car looks awsome! How about setting up a pre-order for it?

Any chance for a all purple parts car?

Thanks.
__________________
Muchmore l AHRP l Xenon l Futaba
TFR is offline   Reply With Quote
Old 01-20-2006, 09:15 PM   #16965
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

Quote:
Originally Posted by TFR
Any chance for a all purple parts car?

I second that vote for a purple car or even all black.......
__________________
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
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 10:25 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