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 08-16-2008, 08:45 PM   #29161
Tech Master
 
timmay70's Avatar
 
Join Date: Dec 2003
Posts: 1,702
Trader Rating: 5 (100%+)
Default

Actually, I had been testing it since it came out and for the most part it runs great. Have at it and let us know your results... My video of my Rev.5 has been up on youtube for a while. I got camera nervous, but you get the gist that it can handle the motor...
__________________
Speed Merchant Rev7, Tekin, TQ Racing (wire), Team Tamale
RC Excitement - Buy where you race, support your local tracks.
ROAR #105242
timmay70 is offline   Reply With Quote
Old 08-16-2008, 10:30 PM   #29162
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Yup, same here. I didn't do all the math stuff (yawn), but just grabbed one, put it in a car, and ran it at the local carpet track. Running a Novak 17.5 the car ran great, the speed control had a very smooth and drivable feel to it. It did not run hot at all and was in the range we consider normal for any BL esc. Whether it is just a fast as the Spheres and GTBs we normally run will take a good deal more testing
__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 08-16-2008, 10:45 PM   #29163
Tech Elite
 
odpurple's Avatar
 
Join Date: Dec 2002
Location: San Francisco
Posts: 2,187
Default

Oh yeah, it has a smaller footprint which makes it easier to mount and balance; and the car weighs about 15 grams less


__________________
TOP Racing USA--OD Racing--Novak--Power Push--J Spec
odpurple is offline   Reply With Quote
Old 08-17-2008, 07:01 AM   #29164
Tech Elite
 
andrewdoherty's Avatar
 
Join Date: Jan 2005
Location: ★Wylie, TX★
Posts: 3,763
Trader Rating: 47 (100%+)
Default

__________________
"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 08-17-2008, 04:58 PM   #29165
Tech Master
 
beta bob's Avatar
 
Join Date: Mar 2007
Posts: 1,101
Trader Rating: 2 (75%+)
Default

Is the mongoose sensorless? i heard that a bl that is sensorless is very choppy when it accelerates out of turns.
__________________
Team Terribles---------2009 post of the year
"Cant you read Mopar???He said that he drives a T-max 2.5!!!!"
Spec classes are for communist
beta bob is offline   Reply With Quote
Old 08-17-2008, 05:26 PM   #29166
Tech Elite
 
RCSteve93's Avatar
 
Join Date: Dec 2005
Location: Long Island, New York
Posts: 4,603
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by beta bob View Post
Is the mongoose sensorless? i heard that a bl that is sensorless is very choppy when it accelerates out of turns.
SL technology has really improved. One cool thing about SL is it is more efficient and saves power. Speed Passion used that advantage by using sensored for start up from a stopping point and once it gets up and going it uses SL. That is smart engineering.
__________________
rm -rf /windows
RCSteve93 is offline   Reply With Quote
Old 08-17-2008, 05:27 PM   #29167
Tech Elite
 
RCSteve93's Avatar
 
Join Date: Dec 2005
Location: Long Island, New York
Posts: 4,603
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by beta bob View Post
Is the mongoose sensorless? i heard that a bl that is sensorless is very choppy when it accelerates out of turns.
Oh and the Mongoose is sensored.
__________________
rm -rf /windows
RCSteve93 is offline   Reply With Quote
Old 08-17-2008, 05:38 PM   #29168
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,157
Default

Quote:
Originally Posted by RCSteve93 View Post
SL technology has really improved. One cool thing about SL is it is more efficient and saves power. Speed Passion used that advantage by using sensored for start up from a stopping point and once it gets up and going it uses SL. That is smart engineering.
The Tekin RS and RS Pro do that as well in hybrid mode which is the default mode. You can also run it in sensored only mode if you like or remove the sensor wire and run it fully sensorless.
InspGadgt is offline   Reply With Quote
Old 08-18-2008, 05:03 PM   #29169
Tech Master
 
beta bob's Avatar
 
Join Date: Mar 2007
Posts: 1,101
Trader Rating: 2 (75%+)
Default

Thanks steve... Also do you know what tires i should run on a carpet track that we are not allowed to use any traction compounds??? I was looking at jaco or parma but i don't know what compound of foam tire i will need to hook up on the track well and not have a lot of traction wear.
__________________
Team Terribles---------2009 post of the year
"Cant you read Mopar???He said that he drives a T-max 2.5!!!!"
Spec classes are for communist
beta bob is offline   Reply With Quote
Old 08-18-2008, 05:15 PM   #29170
Tech Apprentice
 
Join Date: Aug 2008
Location: Southern canada
Posts: 60
Default DB12R

HEY GUYS. VERY CLOSE TO BUYING A NEW DB12R. WHAT ARE THE GOOD AND BAD POINTS ON THIS CAR. I TEND TO BE A VERY COMPETITIVE PERSON AND LIKE THE BEST THINGS WHEN IT COMES TO RACING. THANKS A LOT GUYS
windsor is offline   Reply With Quote
Old 08-18-2008, 05:29 PM   #29171
Tech Regular
 
intimidator's Avatar
 
Join Date: Oct 2003
Location: Orlando,Florida
Posts: 257
Default

My used 12L4 I got for 40 bucks with no electronics.I have a GTB to put in when I get a bl motor,needs some 16 gauge wire too.
Attached Thumbnails
1/12 forum-rc-001_1.jpg  
intimidator is offline   Reply With Quote
Old 08-18-2008, 05:33 PM   #29172
Tech Adept
 
Rob Burns's Avatar
 
Join Date: Jul 2008
Location: Sydney
Posts: 176
Trader Rating: 4 (100%+)
Default

The DB12R is a sweet ride. The best part about it is that it never tweaks. Any other 12th scale you hit a wall and it can tweak the car. Heck, I've had it where I didn't change a thing from one race to the next and the car was tweaked. No so with the DB12R. It's tough too. The very first versions had a weak spot in the rear pod which was fixed very soon after the car was released. Only thing I've broken since then is one flex plate. Customer support is second to none and you'll get replies to your emails within a couple of hours.

The only bad thing I can say about the car is the cost of shipping stuff to Canada. The cost of shipping more than doubled for the exact same product from one month to the next and has increased again since then. If you're not in Canada then you're laughing.
Rob Burns is offline   Reply With Quote
Old 08-18-2008, 06:16 PM   #29173
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,660
Trader Rating: 85 (99%+)
Default

Quote:
Originally Posted by windsor View Post
HEY GUYS. VERY CLOSE TO BUYING A NEW DB12R. WHAT ARE THE GOOD AND BAD POINTS ON THIS CAR. I TEND TO BE A VERY COMPETITIVE PERSON AND LIKE THE BEST THINGS WHEN IT COMES TO RACING. THANKS A LOT GUYS
Its a great car and the box stock setup is great for asphalt racing.
Like Rob mentioned the only thing I've broken so far is one side flex plate. If I remember correctly Jason recomends having flex plates, and the center pivot as extras in your pit box. The instructions are excelent and it was one of the easiest builds ever. The only mods I've done is to use the CRC GenX front end over the standard Assoc one, and use the slapmaster thrust bearing system for the rear axle.
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 08-18-2008, 07:15 PM   #29174
Tech Apprentice
 
Join Date: Aug 2008
Location: Southern canada
Posts: 60
Default crc front

That sounds like a cool thing to try. Where can I get a gen x front end. Is it the ver 3 red?
windsor is offline   Reply With Quote
Old 08-18-2008, 07:16 PM   #29175
Tech Master
 
CREWMAN's Avatar
 
Join Date: Aug 2007
Posts: 1,539
Trader Rating: 19 (100%+)
Default

Quote:
Originally Posted by beta bob View Post
Thanks steve... Also do you know what tires i should run on a carpet track that we are not allowed to use any traction compounds??? I was looking at jaco or parma but i don't know what compound of foam tire i will need to hook up on the track well and not have a lot of traction wear.
i know what track you are talking about (mushroom bowl). I have never ran there but guys at my track who have ran there say that they allow you to use gojo hand cleaner with no pumice. they said that the gojo work very well, going by that i run jaco yellows in the rear and lilac up front. If i need more steering use double pinks up front.
__________________
D&K HOBBIES!!!!
Losi 8ight-T 2.0 Race Roller/Losi 350/JR 9100 Servos/Spektrum DX3R
BMI Copperhead 12/Thunder Power Lipo/Futaba Servo/Express 17.5/Spektrum DX3R
CREWMAN 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 01:20 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