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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 02-05-2012, 09:53 PM   #37666
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Personally I don;t do either. Here is what I do.

I usually buy a few of each spring rates at a time and I will open all the packages of each rate at a time ad using my calipers measure each one and match them up by height. this way I get as close to the same springs as possible. I also double check the thickness of the spring wire as I have had packages with 2 different spring rates in them.

Then with the springs installed on the kingpins I leave them just loose where there is some play in spring to retainer.

Put the car with freshly cut tires and check the ride height and then adjust the ride height so it;s equal and both sides have a little droop in the front.


Then set the side springs to tweak the car and poof ready to run
I do exactly the same thing, with the exception of running each set twice, rotating after one run, to compensate for "spring settling" after 2" loaded runs", to equalize each set.
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Old 02-05-2012, 09:59 PM   #37667
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Now there is a good Idea. I do compress the springs a few times before measuring to try and get a settled spring size
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Old 02-05-2012, 10:03 PM   #37668
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Now there is a good Idea. I do compress the springs a few times before measuring to try and get a settled spring size
Guess, I'm Old Skool. The Old Block Front-end had a certain proclivity for collapsing springs, so this was a learned behavior. Just one more step towards total pan car consistency......
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Old 02-05-2012, 10:12 PM   #37669
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Default axle ID??

I recently bent a front axle in an older t-bar Hyperdrive 1/12, upon removing the axle I'm unsure as to its maker, anyone know baised on the pic? As you can see it is held in place with a c-clip and has a bunch of ribs running along its length also. The fontend looks like an IRS oval unit but I'm not for sure there. Thanks
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Old 02-05-2012, 10:16 PM   #37670
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I recently bent a front axle in an older t-bar Hyperdrive 1/12, upon removing the axle I'm unsure as to its maker, anyone know baised on the pic? As you can see it is held in place with a c-clip and has a bunch of ribs running along its length also. Thanks
That is a PSE front-stub axle. Circa 1994'ish. I have three sets in the box downstairs. A very reliable product at older speeds, but a bit soft for today's HP/weight ratio. A properly trimmed foam bumper though, could definitely keep them viable........
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Old 02-05-2012, 10:32 PM   #37671
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That is a PSE front-stub axle. Circa 1994'ish. I have three sets in the box downstairs. A very reliable product at older speeds, but a bit soft for today's HP/weight ratio. A properly trimmed foam bumper though, could definitely keep them viable........
Thanks for the info Ian, I'm just running this car with a 17.5/4-cell GTB and old round cells for fun and durring down time so it does'nt see much hard use; although enough to do some damage. I'll google and see if I can find some, unless you'd like to sell me one of your sets.
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Old 02-05-2012, 10:50 PM   #37672
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Thanks for the info Ian, I'm just running this car with a 17.5/4-cell GTB and old round cells for fun and durring down time so it does'nt see much hard use; although enough to do some damage. I'll google and see if I can find some, unless you'd like to sell me one of your sets.
I would sell a set, but as a Parma/PSE driver, I would see that as an impropriety on my part. Add in the fact that they still work great on my son's Legends car, and I end up with an ethical dilemma. If you can't find some, the Ti axles that CRC sells are direct replacements,

http://www.teamcrc.com/crc/modules.p...od&prodID=4115
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Old 02-05-2012, 10:52 PM   #37673
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I would sell a set, but as a Parma/PSE driver, I would see that as an impropriety on my part. Add in the fact that they still work great on my son's Legends car, and I end up with an ethical dilemma. If you can't find some, the Ti axles that CRC sells are direct replacements,

http://www.teamcrc.com/crc/modules.p...od&prodID=4115
Np I found them on the Parma website and it shows as avalible.
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Old 02-05-2012, 10:59 PM   #37674
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Np I found them on the Parma website and it shows as avalible.
Dialed in!!

Thank Steve for me!! Always great service from the Parma/PSE crew.
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Old 02-06-2012, 05:06 PM   #37675
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Personally I don;t do either. Here is what I do.

I usually buy a few of each spring rates at a time and I will open all the packages of each rate at a time ad using my calipers measure each one and match them up by height. this way I get as close to the same springs as possible. I also double check the thickness of the spring wire as I have had packages with 2 different spring rates in them.

Then with the springs installed on the kingpins I leave them just loose where there is some play in spring to retainer.

Put the car with freshly cut tires and check the ride height and then adjust the ride height so it;s equal and both sides have a little droop in the front.


Then set the side springs to tweak the car and poof ready to run
Ohh I can't wait to try this!!

Can anyone recommend some weights and good double sides tape? I've had only so so results with 3m, lock tight, & some no name stuff.
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Old 02-07-2012, 04:38 PM   #37676
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OK I'm really confused and I'm hoping the 12th scale gurus can set me straight ! I read some posts several pages back about the Enneti foams but I'm not sure which ones people were talking about. On Stormer's site there appear to be 2 different groupings of tires, one that reference shore ratings and have 'AF' and 'AR' in the part #'s and one that are listed by colour that appear to be similar to the Jaco colour rating and have 'MR' in the part #. To confuse matters more I see there are tires on A-Main's site called Xceed 'Enneti' that appear to be different altogether from the ones on Stormer. If I'm interested in trying out the Enneti tires, which ones should I be looking at? Currently I run Jaco's and typically Black or Lilac fronts and Yellow or Orange rears so I'd want something relatively similar.

Any assistance would be greatly appreciated!

Cheers,
Mike
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Old 02-07-2012, 05:40 PM   #37677
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If you run yellow and black Jacos, try yellow and black Ennetis from Stormer. They work well for me.
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Old 02-07-2012, 05:52 PM   #37678
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Originally Posted by Hyper_Mike View Post
OK I'm really confused and I'm hoping the 12th scale gurus can set me straight ! I read some posts several pages back about the Enneti foams but I'm not sure which ones people were talking about. On Stormer's site there appear to be 2 different groupings of tires, one that reference shore ratings and have 'AF' and 'AR' in the part #'s and one that are listed by colour that appear to be similar to the Jaco colour rating and have 'MR' in the part #. To confuse matters more I see there are tires on A-Main's site called Xceed 'Enneti' that appear to be different altogether from the ones on Stormer. If I'm interested in trying out the Enneti tires, which ones should I be looking at? Currently I run Jaco's and typically Black or Lilac fronts and Yellow or Orange rears so I'd want something relatively similar.

Any assistance would be greatly appreciated!

Cheers,
Mike
The way Stormer has them listed is confusing.
It looks like two different numbers for the same product ?
Perhaps Bob can shed some light on this...

And then there's this

Stormer has Enetti Foam mounted on Enetti Wheels


A-Main has Enetti Foam mounted on Exceed Wheels
Note the difference in the wheels
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Old 02-07-2012, 05:56 PM   #37679
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can we all go back to white rims? white rims are faster! haha
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Old 02-07-2012, 05:58 PM   #37680
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Default OP12C Black Edition Wins Snowbirds!

On-Point OP12C Black Edition OP300B Tq's and Wins 13.5 1/12 at the Snowbirds piloted by Markus Mobers!!

The third round of qualifying saw Markus Mobers lead from the get go to the end with a new Tq. In the main the tone went off and Markus and his OP12C led start to finish. Markus used the new OP300B Black Edition conversion kit. Now available in black, the OP12C color combo is makes for easier color matching when you convert to it from other 12th cars.

Here is the setup and pictures of the car from the race. If you have any questions please ask.
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Attached Files
File Type: pdf OP12C_Markus_snowbirds_2012_13.5_TQ_win.pdf (297.9 KB, 94 views)
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