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 02-18-2007, 04:51 PM   #23761
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by odpurple
If you have a standard, or Stealth diff, you can't use the big rings. you'll have to get a new axle and right hub. As Anthony said, IRS is a good source, or CRC and AE rings for the 12L4 are all the same.
i also carry the IRS axle and a few more of there products how cool am i.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 02-18-2007, 05:26 PM   #23762
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

Quote:
Originally Posted by protc3
they ran anti squat on the T bar? sounds a little odd.i could be wrong though.i know i wound up going to 2x pink front w/ yellow rears on my car and P dubs.
Every car I have ever driven with a Tbar (oval and on-road) has had at least .010 under the front Tbar pivot. It seems to give the car more steering on power which helps pretty much everywhere. I know my CEFX car at the birds had .050 under the front pivot. And I know of a LOT of other drivers going back to Tbar cars on carpet now after the past two major 12th scale races.

We shall see at the Nats next month!

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 02-18-2007, 06:04 PM   #23763
P2
Tech Fanatic
 
P2's Avatar
 
Join Date: Aug 2003
Location: Oahu, Hi
Posts: 865
Trader Rating: 15 (100%+)
Default

OD, Check out our race here last Sat...it was neck-neck the whole way through! We had a good turnout, TC is all but dead here

http://www.jlapracemanager.com/cgi-b...re=HobbyTownSA

AdrianM, Get Larry P's TC to him so he'll stop making me work too hard in 1/12.

I'm too old for all the stress
__________________
TopRacingUSA | Team EPIC | Thunder Power | OD Racing
P2 is offline   Reply With Quote
Old 02-18-2007, 06:07 PM   #23764
aca
Tech Apprentice
 
Join Date: Jun 2005
Location: Clinton,ms
Posts: 43
Default

Thanks for the correction about the diff rings,OD


Allen
aca is offline   Reply With Quote
Old 02-18-2007, 07:01 PM   #23765
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

P2, looks like ya had some fun down there..... when are you making a road trip for a warm-up to the Taxas State Championships?
__________________
Hot Bodies | HPI Racing | HPI TV | Speedzone USA | Team Epic | Trinity | TRC
V-Dezign 4.0
David Galdo is offline   Reply With Quote
Old 02-18-2007, 07:05 PM   #23766
Tech Apprentice
 
SARCAR_Revmax's Avatar
 
Join Date: Nov 2006
Location: Canada
Posts: 77
Send a message via MSN to SARCAR_Revmax
Default

I'm bringing out the Grandpa of all 12th scales again, and was wondering what a good upgrade would be from a 12LS? *acts embarrassed because of the age of the car*
__________________
Xray T2 '007
SMC Batteries
Novak GTB 13.5/17.5 Brushless
SARCAR_Revmax is offline   Reply With Quote
Old 02-18-2007, 07:06 PM   #23767
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by EAMotorsports
Every car I have ever driven with a Tbar (oval and on-road) has had at least .010 under the front Tbar pivot. It seems to give the car more steering on power which helps pretty much everywhere. I know my CEFX car at the birds had .050 under the front pivot. And I know of a LOT of other drivers going back to Tbar cars on carpet now after the past two major 12th scale races.

We shall see at the Nats next month!

EA
cool.i have always been a big fan of the T bar cars.thats what i was after with my new car.i am working on new center springs now which i think are going to finally give me a complete T bar feel and also let me have more adjustment than the T bar.keep your eyes and mind open dude.i think this is going to be real good.the car is better than expected already.this is going to put the icing on the cake.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 02-18-2007, 07:27 PM   #23768
Tech Addict
 
Join Date: Jun 2005
Location: Halifax, Nova Scotia, Canada
Posts: 708
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by adam lancia
cool arms!

question about tires (i know, this is always a loaded question). what are the differences between jaco and crc foams? specifically the high rollers vs the regular jaco's? am i right to assume that since the high rollers have less foam on the rim, that effectively stiffens the feel of the foam since there is less foam to spuish...? and would the opposite be true for the crc's? the reason i ask is because i was running some white jaco's and chunked them so i changed them out for what a fast guy recommended which was high roller whites. it pushed much more with the whites so i went to high roller pinks and it was still pushing. it was more balanced with the jaco whites on the rear. if anyone could give me some guidance, it would be a great help. thanks!!!
can anyone answer this for me or is it too broad a question? ANY feedback would be awesome, thanks guys.
adam lancia is offline   Reply With Quote
Old 02-18-2007, 07:35 PM   #23769
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

Quote:
Originally Posted by protc3
cool.i have always been a big fan of the T bar cars.thats what i was after with my new car.i am working on new center springs now which i think are going to finally give me a complete T bar feel and also let me have more adjustment than the T bar.keep your eyes and mind open dude.i think this is going to be real good.the car is better than expected already.this is going to put the icing on the cake.
Your car is going to be dialed after a little more time with it...Hell it was pretty damn good at the birds!!

I know in my experience with pivot ball Oval cars the center shock and center shock length were two of the most important adjustments to how the car steered.....So if you can figure springs out for it and get them dialed in your car will be unbelievably good!!

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 02-18-2007, 07:36 PM   #23770
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

in a nutshell,a bigger tire has more contact patch and more forward traction.the purpose of high roller tires and wrap tires is to allow for less of a sidewall while still achieving a larger contact patch for added forward traction.if you run high roller rears you need fronts also to balance the car out.the diameter spread will be too much.if you run white high roller rears with say purple or black fronts and your car pushes,chances are,your setup needs help.post your setup,type of car and tires and im sure we can point you in the right direction.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 02-18-2007, 07:45 PM   #23771
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by EAMotorsports
Your car is going to be dialed after a little more time with it...Hell it was pretty damn good at the birds!!

I know in my experience with pivot ball Oval cars the center shock and center shock length were two of the most important adjustments to how the car steered.....So if you can figure springs out for it and get them dialed in your car will be unbelievably good!!

EA
we did mess with shock length at the birds.that comment is sooo true.i have 2 positions for the antenna mount to allow for length adjustment and we tested with both.Pdubs car had it set longer and mine was in the short position.unfortunately we were all lab rats for the first time out. the only problem i ran into at the birds was time.so much to get dialed in in such a short amount of time.we did get it pretty good but i think it has alot more in it.the biggest problem i am finding with isolated rear suspension is that with the T bar cars,your front to rear spring tension is extremely progressive being that the spring tension is from the spring and also from the forward flex of the Tbar.with the link style cars,you lose that all together and now you are stuck with an extremely linear spring.i have the progressive spring tension with the twist of the rear pod,now i want it for compression.with the new springs i will have that but with it being extremely controlable and adjustable for different surfaces.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts

Last edited by protc3; 02-18-2007 at 08:32 PM.
protc3 is offline   Reply With Quote
Old 02-18-2007, 07:54 PM   #23772
Super Moderator
 
Marcos.J's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2003
Location: Semper Fi
Posts: 25,177
Trader Rating: 140 (100%+)
Default

Quote:
Originally Posted by protc3
we did mess with shock length at the birds.that comment is sooo true.i have 2 positions for the antenna mount to allow for length adjustment and we tested with both.Pdubs car had it set longer and mine was in the short postion.unfortunately we were all lab rats for the first time out. the only problem i ran into at the birds was time.so much to get dialed in in such a short amount of time.we did get it pretty good but i think it has alot more in it.the biggest problem i am finding with isolated rear suspension is that with the T bar cars,your front to rear spring tension is extremely progressive being that the spring tension is from the spring and also from the forward flex of the Tbar.with the link style cars,you lose that all together and now you are stuck with an extremely linear spring.i have the progressive spring tension with the twist of the rear pod,now i want it for compression.with the new springs i will have that but with it being extremely controlable and adjustable for different surfaces.
Marcos.J is offline   Reply With Quote
Old 02-18-2007, 07:56 PM   #23773
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,813
Trader Rating: 13 (100%+)
Default

__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 02-18-2007, 08:01 PM   #23774
Tech Master
 
CarlosG.'s Avatar
 
Join Date: Jul 2004
Location: Falls City,TX
Posts: 1,145
Trader Rating: 12 (100%+)
Send a message via Yahoo to CarlosG.
Default

Quote:
Originally Posted by David Galdo
P2, looks like ya had some fun down there..... when are you making a road trip for a warm-up to the Taxas State Championships?
He already had his warm-up in Nebraska this week. He took his car with him to race after he was done with his job he had to do up there. I am thinking of coming up on the first weekend in March, like the 3rd . I am going to see if I can get some more people to come with me.
CarlosG. is offline   Reply With Quote
Old 02-18-2007, 08:02 PM   #23775
Super Moderator
 
Kraig's Avatar
 
Join Date: Aug 2001
Location: Sun Prairie, WI
Posts: 6,276
Trader Rating: 69 (100%+)
Default

Hey EA, which front width chassis are you running for your CEFX car?
__________________
There is great need for a sarcasm font.

You never know when it will strike, but there comes a moment at work when you know that you just aren't going to do anything productive for the rest of the day.

Sometimes I post just to look at my avatar.
Kraig 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: 2 (0 members and 2 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 11:55 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