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 03-22-2009, 10:33 AM   #31081
Tech Champion
 
RC MARKET's Avatar
 
Join Date: Feb 2007
Location: HK
Posts: 6,127
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by CFR View Post
anyone???
KO 951 only Hi Torque & Speed

Ceramic Balls 12pcs $5-6.5 only !
RC MARKET is offline   Reply With Quote
Old 03-22-2009, 02:16 PM   #31082
Tech Master
 
Join Date: Jan 2005
Posts: 1,625
Trader Rating: 36 (100%+)
Default

Quote:
Originally Posted by dgullickson View Post
Have plenty of 1/8 balls left at www.axiommotors.com


RC MARKET
KO 951 only Hi Torque & Speed

Ceramic Balls 12pcs $5-6.5 only !
I don't see why you dealers can't keep your spam in the proper place.

I understand why you advertise and we buy from your businesses, you should just keep it where it belongs.
EVILGRAFX is offline   Reply With Quote
Old 03-23-2009, 11:47 AM   #31083
Tech Master
R/C Tech Elite Subscriber
 
Join Date: Oct 2008
Location: Grand Portage, MN
Posts: 1,362
Trader Rating: 39 (100%+)
Default

I gotta a quick question.

at our track most guys are running a purple/white combo(jaco) and are running really well. The cars are all GenX

The problem I am having is I have tried this combo and the car pushes soo bad that I cannot make the 1 high speed corner at all. So I have gone to Magenta/Grey combo

our setups from what I can tell are the same but even with the magenta tires I don't get hte grip that the others are getting on purples.

but atleast I'm still having fun
jdeadman is offline   Reply With Quote
Old 03-23-2009, 12:07 PM   #31084
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,639
Trader Rating: 21 (100%+)
Default

I'm surprised they can get them to turn at all with purple/white. My favorite combo for my track (slick ozite/19t or 10.5) is either magenta/pink or magentas all around. Haven't tried yellow rears yet but hope to give them a try soon. As for greys, I like them on some tracks for stock but just can't get enough grip from them for 19t/10.5.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 03-23-2009, 12:11 PM   #31085
Tech Elite
 
theisgroup's Avatar
 
Join Date: Apr 2002
Posts: 3,191
Trader Rating: 10 (100%+)
Default

if you are just getting a push with purple/white, you may try purple/yellow. white usually are too soft and have way too much tracktion. the yellow are just as soft, but do not have as much tracktion as the whites. yellows are like gray, but do not tack up as you get deeper into the run like a gray
__________________
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 03-23-2009, 12:35 PM   #31086
Tech Master
R/C Tech Elite Subscriber
 
Join Date: Oct 2008
Location: Grand Portage, MN
Posts: 1,362
Trader Rating: 39 (100%+)
Default

Yea I have noticed that the grey's do "let go" at about the 7 min mark of a race. but I have found that less is more with the traction compound and have been getting better results.

Cheers
jdeadman is offline   Reply With Quote
Old 03-24-2009, 06:48 AM   #31087
Tech Master
 
jkirkwood's Avatar
 
Join Date: Feb 2007
Posts: 1,223
Trader Rating: 8 (100%+)
Default

Anyone know of any other manufactures that will be offering a hard case 1S lipo soon?
jkirkwood is offline   Reply With Quote
Old 03-24-2009, 07:08 AM   #31088
Tech Master
 
miller tyme's Avatar
 
Join Date: Nov 2007
Location: Indiana
Posts: 1,552
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by jkirkwood View Post
Anyone know of any other manufactures that will be offering a hard case 1S lipo soon?
Thunder Power should have one out in about a month, also several other labels are in the works but probably won't see them till mid/late summer.
__________________
Ken Miller
RC America - X-Ray - ORCA - EA Motorsorts - Pro Level RC - Sanwa - TQ Wire - ProOne Racing Tires -

LONG LIVE OPEN MODIFIED
miller tyme is offline   Reply With Quote
Old 03-24-2009, 07:19 AM   #31089
Tech Master
 
jkirkwood's Avatar
 
Join Date: Feb 2007
Posts: 1,223
Trader Rating: 8 (100%+)
Default

Thanks, I'm in no hurry. The local track rules are set through Dec 09 anyways, but I do want to start testing sometime this summer.
jkirkwood is offline   Reply With Quote
Old 03-24-2009, 07:26 AM   #31090
Tech Regular
 
rinkrat99's Avatar
 
Join Date: Sep 2003
Location: Colorado
Posts: 420
Send a message via AIM to rinkrat99
Default SP12X Track Width

Hi All

I was wondering what is the maximum rear track width people have been using with the US Axle and a Brushless setup that requires the use of a standard 64p pinion?

I noticed with a 1mm installed on each side of the axle carrier, that the pinion barely makes contact properly with the spur. If it does make contact, it may be lopsided when rotating.

Thanks
rinkrat99 is offline   Reply With Quote
Old 03-24-2009, 09:11 AM   #31091
Tech Master
 
EricF's Avatar
 
Join Date: Jun 2003
Location: AZ
Posts: 1,516
Default

Quote:
Originally Posted by rinkrat99 View Post
Hi All

I was wondering what is the maximum rear track width people have been using with the US Axle and a Brushless setup that requires the use of a standard 64p pinion?

I noticed with a 1mm installed on each side of the axle carrier, that the pinion barely makes contact properly with the spur. If it does make contact, it may be lopsided when rotating.

Thanks
The max. width is 172mm (outside to outside rear tire) the main thing that you want to do is set the rea axle width so that it's equal from the center of the pod to the mounting face of the wheel hub (left and right).
E
EricF is offline   Reply With Quote
Old 03-24-2009, 09:28 AM   #31092
Tech Master
R/C Tech Elite Subscriber
 
Join Date: Oct 2008
Location: Grand Portage, MN
Posts: 1,362
Trader Rating: 39 (100%+)
Default

I was running 167mm (with jaco 3mm offset rear tires) then I got a set of zero offset older jaco tires off a fellow racer and really noticed how that extra 6mm helped the handeling alot. I got better lap times and overall more consistancy.

So when I went back to the new style GRP balloons as the guy's like to call them (35mm rims with 52mm total OD foam. I started to shim the rear axle 3mm per side and noticed that I had to offset the pinion about halfway off of the motor shaft.

So I am currently looking for spacers to go between the tire and hub mounting face that are 3mm to get that room on the spur side without moving the spur too far out.

I heard that BMI has some spacers but I have yet to find any pictures of them
jdeadman is offline   Reply With Quote
Old 03-24-2009, 04:03 PM   #31093
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,661
Trader Rating: 85 (99%+)
Default

Quote:
Originally Posted by jdeadman View Post
I was running 167mm (with jaco 3mm offset rear tires) then I got a set of zero offset older jaco tires off a fellow racer and really noticed how that extra 6mm helped the handeling alot. I got better lap times and overall more consistancy.

So when I went back to the new style GRP balloons as the guy's like to call them (35mm rims with 52mm total OD foam. I started to shim the rear axle 3mm per side and noticed that I had to offset the pinion about halfway off of the motor shaft.

So I am currently looking for spacers to go between the tire and hub mounting face that are 3mm to get that room on the spur side without moving the spur too far out.

I heard that BMI has some spacers but I have yet to find any pictures of them

These are the spacers that Jason made for the Jacos.
http://www.bmiracing.com/webstore/ca...f9470643c45c60
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 03-24-2009, 04:05 PM   #31094
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,661
Trader Rating: 85 (99%+)
Default

Does anyone know the size of the screw for the left side clamping hub?

Thanks
Chris
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 03-24-2009, 04:08 PM   #31095
Tech Fanatic
 
Join Date: Jun 2005
Posts: 900
Default

Corally cars have always needed long-boss pinions - using short-boss pinions and the incorrect axle spacing will affect the handling. See long-boss pinions on the Corally site under 'Parts', 'Car Accessories'.

Run the rear of the Corally at 170mm to get the car to steer well. HTH
SlowerOne 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: 4 (2 members and 2 guests)
JoseM, Kave
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 07:08 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