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 09-14-2008, 10:33 AM   #29311
Tech Champion
 
JayBee's Avatar
 
Join Date: Mar 2004
Location: 12TH-MAN COUNTRY
Posts: 6,803
Trader Rating: 31 (100%+)
Default

Quote:
Originally Posted by VooDooPH View Post
any suggestions on tires? indoor asphalt track. layout is more flowing than technical. on rubber tire touring we use Sorex 36 with medium inserts.

appologies for the noob question... just starting out on 12th scale...
If traction is pretty good, try Purple frts/ Dbl Pink rears

On a side note, anyone using the Hot Bodies 1/12th center shock? I built one up last night and this thing is BUTTER.....
__________________
R C 3 G R A F I X _ F U S I O N . G R A P H I X _ S E A T T L E - R/C - R A C E R S _ E M E R A L D C I T Y R C . C O M

A E - 12R5.2 _ S M - REV8 PRO
JayBee is offline   Reply With Quote
Old 09-14-2008, 12:18 PM   #29312
Tech Elite
 
andrewdoherty's Avatar
 
Join Date: Jan 2005
Location: ★Wylie, TX★
Posts: 3,763
Trader Rating: 47 (100%+)
Default

I've tried the HB shock and you're right, it is butter. I feel the spring perch was poorly engineered though. The threaded post where ball cup threads onto the perch is not strong. I've broken that threaded piece off twice two different ways. The first time it broke when I was snapping the ball cup onto the ball. The second time it broke was on the track. I bobbled and wound up hitting a board head on. It was an average hit so I was surprised when I saw the shock dangling. When I looked at the broken pieces I could tell there just wasn't enough material to give it the strength it needs. Ill have to see how much the replacement part is or better yet if I can come up[ with a way to fix it and strengthen it. Id rather see the part made of steel, or beefed up.
__________________
"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 09-14-2008, 12:37 PM   #29313
Tech Master
 
WIITA's Avatar
 
Join Date: Jun 2008
Posts: 1,549
Trader Rating: 41 (100%+)
Default gearing suggestions

Just looking for some gearing suggestions for starters in my 1/12 scale. stock motor, have a 88 and 78 spur. Tires will be trued to 46mm in back and 43 to 44 in front. any help would be great. also might run a 17.5 how would it change?
WIITA is offline   Reply With Quote
Old 09-14-2008, 12:47 PM   #29314
Tech Elite
 
Scottmisfits's Avatar
 
Join Date: Jun 2004
Posts: 3,104
Trader Rating: 7 (100%+)
Default

Just wondering if anyone in here knows if the AE T-Plate , and if so which one, fit's in the Kawada 1/12 scale car. They look the same but I want to know for sure before ordering them if possible.
Scottmisfits is offline   Reply With Quote
Old 09-14-2008, 01:54 PM   #29315
Tech Fanatic
 
Join Date: Apr 2003
Location: Calgary, Alberta
Posts: 755
Trader Rating: 2 (100%+)
Default

Scott are you racing tonight? If so check around someone must have a AE t-plate to size up.
__________________
Shawn Plume
www.pmhobbycraft.ca
Frantic Racing (Est. 1988)
Ophidian is offline   Reply With Quote
Old 09-14-2008, 02:58 PM   #29316
Tech Adept
 
Join Date: Jul 2006
Posts: 133
Default

Hi,

quick question, just wondering what brushless motor you guys run in pro12 modified on a medium sized tarmac track.

I've got a 7.5 from my touring car which i'm going to put into my 12th, just wondering if it'll be enough.

Cheers
Matt
__________________
Matt van der Haas
RCRacer.co.nz - New Zealand RC - news - videos - photos
drivingpro is offline   Reply With Quote
Old 09-14-2008, 03:35 PM   #29317
Tech Elite
 
trackdesigner71's Avatar
 
Join Date: Sep 2002
Location: Lynchburg/Portsmouth, VA
Posts: 4,978
Trader Rating: 4 (100%+)
Send a message via AIM to trackdesigner71 Send a message via Yahoo to trackdesigner71
Default

Anybody tried out the new Audi based 12th scale bodies? I think Parma makes them...
trackdesigner71 is offline   Reply With Quote
Old 09-14-2008, 04:11 PM   #29318
Tech Master
 
PizzaDude's Avatar
 
Join Date: Nov 2002
Location: Parts Unkown
Posts: 1,015
Default

Quote:
Originally Posted by trackdesigner71 View Post
Anybody tried out the new Audi based 12th scale bodies? I think Parma makes them...
Black Art makes them.
CRC carries them.
PizzaDude is offline   Reply With Quote
Old 09-14-2008, 04:56 PM   #29319
Tech Champion
 
JayBee's Avatar
 
Join Date: Mar 2004
Location: 12TH-MAN COUNTRY
Posts: 6,803
Trader Rating: 31 (100%+)
Default

I like the looks of the Audi R8C....
__________________
R C 3 G R A F I X _ F U S I O N . G R A P H I X _ S E A T T L E - R/C - R A C E R S _ E M E R A L D C I T Y R C . C O M

A E - 12R5.2 _ S M - REV8 PRO
JayBee is offline   Reply With Quote
Old 09-14-2008, 08:51 PM   #29320
Tech Initiate
 
Join Date: Feb 2006
Location: Woodbridge, Virginia
Posts: 40
Send a message via AIM to Sunshine86
Default

Quote:
Originally Posted by InspGadgt View Post
All 3 of those are good choices and you can't go wrong with them. I've used the LRP QC2 and the Tekin FX in 1/12th stock. If you plan to go to a Spektrum system in the future I'd stay away from the LRP. Their BECs tend to be a tad too weak for the Spectrum recievers and many people have had problems with that. Also with my QC2 the metal contacts on the PC board where the wires solder in eventually delaminated from the board. With the QC3 built the same way I imagine that would happen on that one too. The Novak I believe has the smallest foot print but also the largest capacitor so overall the GTX and FX end up taking up about the same amount of space. I really like my Tekin FX but you have to get used to adjusting push or anti-drag on the ESC and not on the radio. Many people will bump up the throttle trim to adjust this but the FX will not let you do that. Also if you plan to go to BL before going to mod brushed then save yourself a bit of cash and get the regular FX not the Pro...unless you are running hot mods you'll have no need of the Pro.
To be completely honest, I understand very little of that (I'm really not that electronic-savvy, but I would like to learn).
Sunshine86 is offline   Reply With Quote
Old 09-14-2008, 09:10 PM   #29321
Tech Adept
 
Rob Burns's Avatar
 
Join Date: Jul 2008
Location: Sydney
Posts: 176
Trader Rating: 4 (100%+)
Default

Anyone know where I can get small spur gears for 12th . Right now the smallest I can find locally is 88. I know PRS make 76 and 80 tooth spurs but shipping to Canada is $20 for one spur.
Rob Burns is offline   Reply With Quote
Old 09-14-2008, 09:56 PM   #29322
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,157
Default

Quote:
Originally Posted by Rob Burns View Post
Anyone know where I can get small spur gears for 12th . Right now the smallest I can find locally is 88. I know PRS make 76 and 80 tooth spurs but shipping to Canada is $20 for one spur.
It's like that to Hawaii too...and they don't answer e-mails. They sure make great gears but don't seem to want customers.

The Robinson machined gears get down pretty small too.

Stormer has PRS 76's in stock:
https://www.ssl-stormerhobbies.com/c...s&pn=PRS6476PL

And here's a 78T Robinson:
https://www.ssl-stormerhobbies.com/c...=ns&pn=RRP4178
InspGadgt is offline   Reply With Quote
Old 09-15-2008, 09:23 AM   #29323
Tech Initiate
 
Join Date: Feb 2008
Posts: 30
Default

Quote:
Originally Posted by Ophidian View Post
Since asphalt is low traction my guess would be Speed 8 HD as the HD stand for high downforce
Great! Thanks bud!
RC12 is offline   Reply With Quote
Old 09-15-2008, 12:14 PM   #29324
Tech Adept
 
Rob Burns's Avatar
 
Join Date: Jul 2008
Location: Sydney
Posts: 176
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by InspGadgt View Post
It's like that to Hawaii too...and they don't answer e-mails. They sure make great gears but don't seem to want customers.

The Robinson machined gears get down pretty small too.

Stormer has PRS 76's in stock:
https://www.ssl-stormerhobbies.com/c...s&pn=PRS6476PL

And here's a 78T Robinson:
https://www.ssl-stormerhobbies.com/c...=ns&pn=RRP4178
I ordered that exact Robinson Spur last week but with no pictures I didn't know if it would come with the holes for diff balls. Anyone know if it will or am I SOL?
Rob Burns is offline   Reply With Quote
Old 09-15-2008, 03:15 PM   #29325
Tech Regular
 
junelopez's Avatar
 
Join Date: Jun 2007
Location: Philadelphia
Posts: 274
Default Is there any way I can install BL motor onto a CRC T-Force

I have a CRC T- Force chassis and don't wish to buy another car, just curious to see if I can fit a BL motor into it or do I need to buy another rear POD.

BTW, does anyone here run the diggity design chassis, the one with the battery down the center?

I appreciate your advise in advance.
__________________
Kyosho V-One RRR WC | Losi Type R | AE SC10
BMI DB12R -1/12th scale | BMI DB10R World GT (IN/OUT)
SJCCR | Jackson RC |301 Raceway |Mushroom Bowl |Horsham RC
junelopez 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 01:26 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