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 01-05-2005, 12:48 PM   #10141
Tech Master
 
Join Date: Mar 2002
Location: upstate New York
Posts: 1,364
Trader Rating: 21 (100%+)
Default JohnB

Got it.Thanks.Mario.
lotus1 is offline   Reply With Quote
Old 01-05-2005, 03:52 PM   #10142
Tech Rookie
 
Join Date: Dec 2004
Location: Canada
Posts: 7
Default Speed Merchant REV3

Question - Last night at the track my car was starting to have some problems. About half way through the last race my car became very loose in one direction, and it pushed in the other. Afterwards, I ripped the car down to see nothing changed. The Bearings are spinning free, the tubes are fine, the springs are fine, the screws are tight, the tires are glued, I'm not rubbing, nothings binding up... so I'm pretty much lost! Has anyone had this problem with a REV3? If so, could you give me some tips??? Thanks.
Swayze is offline   Reply With Quote
Old 01-05-2005, 04:03 PM   #10143
Tech Fanatic
 
crimson eagle's Avatar
 
Join Date: Jun 2003
Location: Nor Cal
Posts: 841
Send a message via ICQ to crimson eagle
Default

Tire sizes maybe? How far away are your tires from side to side?

Sometimes it's difficult to see the damper tubes binding up.

Maybe you had a piece of rubber lodged under your chassis during the race.
crimson eagle is offline   Reply With Quote
Old 01-05-2005, 04:14 PM   #10144
Tech Master
 
JamesArluck's Avatar
 
Join Date: Jul 2003
Posts: 1,232
Trader Rating: 52 (100%+)
Send a message via AIM to JamesArluck
Default

Did you check the tweek of your car before you tore it apart? Sometimes you can take a hard hit and things will shift just enough to put a tweek into the car. Also, as crimson eagle said, check your tire diameter. If you don't rotate your tires regularly one side can wear more than the other and throw the car out of tweek.

-James
JamesArluck is offline   Reply With Quote
Old 01-05-2005, 04:24 PM   #10145
Tech Elite
 
litespeed-dom's Avatar
 
Join Date: Oct 2002
Location: Beaverton, Oregon
Posts: 3,990
Trader Rating: 4 (100%+)
Default

When you say very loose on one side, you mean car hooking while turning one way and push turning the other way?

Dom
__________________
Team Kyosho America - Team Br00d Racing - Team R/C Plus - GQ Racing Tyres - Slapmaster Tools - FSX Racing
litespeed-dom is offline   Reply With Quote
Old 01-05-2005, 05:35 PM   #10146
Tech Master
 
Mike D's Avatar
 
Join Date: Sep 2001
Location: Maryland
Posts: 1,095
Send a message via Yahoo to Mike D
Default New axle ride height adjusters

IRS just released new axle ride height adjusters. The adjusters are molded from a stiff composite plastic to reduce flex during side loading. The best part is that they come in 0.5mm (~.020") spacing steps. The stock associated adjusters give over 1mm between steps. No more getting stuck between spacer heights when your tires wear... They are packaged and sold as a set of 8 pairs for $9.50 retail.



http://www.teamirsrc.com/podplates.html#rideheight
Mike D is offline   Reply With Quote
Old 01-05-2005, 05:38 PM   #10147
Tech Elite
 
Chris08527's Avatar
 
Join Date: Dec 2003
Location: 732
Posts: 2,154
Trader Rating: 16 (100%+)
Default

tire diameter ?

new to the 12th scale what is a good starting diameter

also pinion spur for a very tight track and for a med. track

thanks,
chris
Chris08527 is offline   Reply With Quote
Old 01-05-2005, 05:44 PM   #10148
Tech Master
 
RCNitroDude999's Avatar
 
Join Date: Nov 2003
Location: Galveston Island
Posts: 1,660
Trader Rating: 26 (100%+)
Default

anyone run their 12th on asphalt tracks? im looking for a good tire combination.
RCNitroDude999 is offline   Reply With Quote
Old 01-05-2005, 07:12 PM   #10149
PMK
Tech Apprentice
 
Join Date: Oct 2004
Posts: 81
Default

These axle / ride height adjusters don't seem to get it for me. The concept is fine but the execution suffers. I have tried several methods to free up the axle but it still rolls tight. The best method so far has been reaming but still is to tight.

I fabricated a pair from carbon fibre sheet and the axle now runs free. I just don't feel like fabbing a full set by hand.

So the big question is, other than the HG's are there any other precision machined adjusters. Or better still a set of bulkheads that have adjustable ride height with no plastic spacers.

And for what it's worth, in regards to the front carbon brace tweaking the chassis, I just enlarged the holes in the carbon at each end. Size was increased a couple of number drill sizes from original.


PK
PMK is offline   Reply With Quote
Old 01-05-2005, 08:52 PM   #10150
Tech Master
 
Mike D's Avatar
 
Join Date: Sep 2001
Location: Maryland
Posts: 1,095
Send a message via Yahoo to Mike D
Default

Quote:
Originally posted by PMK
... I have tried several methods to free up the axle but it still rolls tight. The best method so far has been reaming but still is to tight.
...
PMK - The trick is to ream the spacers in the car and at the same time. Use a long reamer that stretches between both spacers while they are mounted in the pod plates. Reaming axle spacers individually may free up the axle, but it usually causes too much slop. I'm sure you could use a 3/8" drill bit if you don't have a straight reamer long enough.
Mike D is offline   Reply With Quote
Old 01-05-2005, 09:55 PM   #10151
P2
Tech Fanatic
 
P2's Avatar
 
Join Date: Aug 2003
Location: Oahu, Hi
Posts: 865
Trader Rating: 15 (100%+)
Default

Quote:
Originally posted by RCNitroDude999
anyone run their 12th on asphalt tracks? im looking for a good tire combination.
Purple fronts/Pink rears with .018" front springs.
Good luck,
P2
__________________
TopRacingUSA | Team EPIC | Thunder Power | OD Racing
P2 is offline   Reply With Quote
Old 01-05-2005, 09:58 PM   #10152
Tech Master
 
picco007's Avatar
 
Join Date: Dec 2001
Location: TX.
Posts: 1,748
Trader Rating: 81 (100%+)
Send a message via AIM to picco007 Send a message via Yahoo to picco007
Default

Is that what I'm running P2? If you wouldn't have posted it, I would have never known that.
__________________
EA Motorsports
picco007 is offline   Reply With Quote
Old 01-05-2005, 10:31 PM   #10153
Tech Rookie
 
Join Date: Dec 2004
Location: Canada
Posts: 7
Default Speed Merchant REV3

- yes I usually always rotate the tires frequently.
- no I checked the car after the race, nothing hanging or anything
- It was doing 180's one way, and basically fine the other way other than a little bit of push.

I ripped it down early today and put it all back together a little bit differently;
- Put Corally Hard lube in dampers to stiffen the back end a little bit
- Changed rear springs to harder ones, I think they're .22
- Changed ball cups in steering to make sure it's free
- stiffened the front susp. a bit - running TRC front end

So I'll have to see next Tuesday. Thanks for your help fella's!
Swayze is offline   Reply With Quote
Old 01-05-2005, 10:49 PM   #10154
Tech Fanatic
 
Join Date: Mar 2002
Location: Indianapolis, IN
Posts: 864
Default Re: Speed Merchant REV3

Quote:
Originally posted by Swayze
Question - Last night at the track my car was starting to have some problems. About half way through the last race my car became very loose in one direction, and it pushed in the other. Afterwards, I ripped the car down to see nothing changed. The Bearings are spinning free, the tubes are fine, the springs are fine, the screws are tight, the tires are glued, I'm not rubbing, nothings binding up... so I'm pretty much lost! Has anyone had this problem with a REV3? If so, could you give me some tips??? Thanks.
I have had this happen before. It was caused by the batteries moving over to one side and resting on the side link. This unbalanced the car to one side, causing major tweak of the chassis. And the O-Ring didn't come off, either.
davidl is offline   Reply With Quote
Old 01-06-2005, 12:23 AM   #10155
Tech Elite
 
litespeed-dom's Avatar
 
Join Date: Oct 2002
Location: Beaverton, Oregon
Posts: 3,990
Trader Rating: 4 (100%+)
Default

Swayze,

Do you use locking diff rings? If not, a slipping diff ring would do that. And minor things to look for are....your wires binding the tubes up? Is one tire rubbing on the body? Do both front wheels rotate freely when you are all the way turned on your steering wheel?

Dom
__________________
Team Kyosho America - Team Br00d Racing - Team R/C Plus - GQ Racing Tyres - Slapmaster Tools - FSX Racing
litespeed-dom 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: 3 (2 members and 1 guests)
antlockyer, kiwiazbro
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 03:03 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