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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:

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Old 12-25-2003, 09:29 PM   #5791
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Hmm.. I've found them for about 390 in HK, just prefer to deal within the states...
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Old 12-25-2003, 09:32 PM   #5792
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$390 is not bad, but see what they will charge for shipping. Good luck
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Old 12-25-2003, 09:56 PM   #5793
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Quote:
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$390 is not bad, but see what they will charge for shipping. Good luck
I think shipping is around $10... But I'll still call your place and get a for sure price.
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Old 12-26-2003, 07:59 AM   #5794
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kilruf- I would actually recommend switching to TRC tires if u can get em. They are actually softer than jaco's, lighter (signfigantly), and the shore ratings are much more consistant. They are just ugly as sin, lol. Also I had to dremel my AE hingepins on a strut front end to keep em from binding and to have the arms drop under their own weight.

Also looking at the picture of your car again, a few things I noticed...

Although its not a big deal since you routed the wire right next to the shock, if you can switch to 16 guage wire, since that stuff looks pretty beefy, lol. And do you have the 12th ball IRS diff? Or is that the one that came with the yok worlds car? If its the IRS I would suggest using kimbrough spurs or other spur gears where you can run 12 diff balls instead of the standard 6. If that white one is a RW, then you can only run 8 and it makes a big difference on how long the diff lasts between 8 and 12 balls.

And if you are running asphault, you might want to try using angled mounts to get some high speed steering (since I would assume asphalt tracks wouldnt be that tight). Its a tuning option not something that will make you go faster 100% of the time.
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Old 12-26-2003, 01:07 PM   #5795
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I've got a question for anyone running trinity cars with the trinity front end, I've been using the CRC universal servo mounts, and last night i figured i'd try something new with my favorite car. I removed the mounts and layed the servo (futaba micro) down to the chassis with double sided tape, i'll probably end up shoe gooing it later, anyways, i was wondering what this does to the car, besides lower CoG and the change of ackerman, is there an advantage/disadvantage to running it flat? thanks for any help.
Rob
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Old 12-26-2003, 01:14 PM   #5796
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forgot to mention that the car is a Sb12SE switchblade 12 spashett edition

Last edited by Rob Hochberg; 12-26-2003 at 01:48 PM.
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Old 12-26-2003, 02:58 PM   #5797
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Hi
Would it be possible for someone to post some pictures of the cars mentioned a couple of pages earlier, the Pro Parts 12th and Advanced Racing Technologies Agitator??? It would be VERY interresting to see them...
Or perhaps a link or 2 ???
Thanks!
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Old 12-26-2003, 03:16 PM   #5798
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Hey gang, just wanted to let you know that we got some IRS front end pieces and more of the Silva Concepts hard anodized threaded shock bodies this week.

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Old 12-26-2003, 04:49 PM   #5799
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That Sucks. I just wasted all that money ordering direct from IRS after searching everywhere for the front end! hahaha... Oh well...

Thanks for the advice Stormperson. I don't care much for Trinity. So I won't order TRC's. Although I do run Monster Stocks Of course the one I run is a Fantom... The car is for Carpet. If it was for asphalt... I'd still be running my Yok like i stated before. The axle is a Yok... and I don't plan on changin to the big ring IRS. So I'll just run the small ring with 8 balls. I know it would be nice. But I don't want to put toooo much money in this car.. hehe (look at me talk... I already have!)

No problem with the hinge pins. My arms drop with ease. As for 16 guage wire, I've heard alot of people talking about it here. The wire I use is about 13-14. It doesn't bind up the pod. But I'll switch anyways since you suggested it. I have some 16 left over from my Keyence that I can run to my motor. I'll do that tonight.

Anyways, just painted up a Protoform Speed8. So I'll compare that to my Parma Speed8 tomorrow. Sucks... you have one body with window masks but not over spray film... Then you have one with over spray film but no window masks! haha.. We just can't win!! haha..
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Old 12-26-2003, 05:20 PM   #5800
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Quote:
Originally posted by JCB
Randman,

I deal with a great hobby shop. They have Hudy tire truers in stock I believe. Larry's performance RC 586-997-4840. Chris or Mike can help you out. Let me know if this helps.

Juan
Thanks for the hookup man, just ordered the brand new automatic Hudy tire truer
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Old 12-26-2003, 05:21 PM   #5801
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Quote:
Originally posted by Kraig
Hey gang, just wanted to let you know that we got some IRS front end pieces and more of the Silva Concepts hard anodized threaded shock bodies this week.

Kraig
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I keep hearing about the Silva Concepts threaded shocks, what's different about them than the VCS?
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Old 12-26-2003, 05:34 PM   #5802
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Hey guys, heres another Rugrat. Kilruf got mine done this week. Looking forward to running it tomorrow. See ya in the morning JMac.
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File Type: jpg dscf0008.jpg (33.4 KB, 204 views)
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Old 12-26-2003, 05:52 PM   #5803
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Quote:
Originally posted by lowbugit
Hey guys, heres another Rugrat. Kilruf got mine done this week. Looking forward to running it tomorrow. See ya in the morning JMac.
Hmm... looks like a GT7 actually can fit...
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Old 12-26-2003, 06:26 PM   #5804
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Hey Randman, yeah it fits. Actually I was running a Dually in my 12L3 now that was tight. I like the GT7 not so much the can attached to it but you can't have everything. Kevin Mac.
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Old 12-26-2003, 07:32 PM   #5805
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Hello All,

I finally ventured out into the electric car world (besides my micro RS4s). I got a used CRC Six pack with some motors and batteries. I'm waiting for my GT7 to come in the mail and today I picked up a mini servo. I even picked up a little receiver pack for an aiplane that is 6v 300mah to power the servo (hardly weighs much). I got a couple of pinions at the LHS and will try them out (23,25, and 29) on our tight small track. BTW i'm running stock motor (came with car) and 4 cell 3000 batts, I'll probably pick up a mod motor once I find out what everyone else is running. I be asking alot of questions in the future so please bare with me. If i get the esc tomorrow i'll be testing on sunday. wish me luck.
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