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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 02-26-2002, 03:10 AM   #616
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dave,
It sposed to be in on wednesday. I cant wait, should take a while to build. It took me 6hrs to build my mission. Just all the little touches I put on my on-road cars that matter.
IKE
P.S.Do I have to do anything to the Speed 8 body? spoiler cutting or anything....
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Old 02-26-2002, 03:31 AM   #617
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Dave S- Brass pivot balls are made/sold by Niftech. Make sure you're putting some Trinity Red stuff or diff grease in them so that the kingpins move smoothly. I wish we had even three cars of 12th mod so that I could run it during a club race. This past Saturday was a fiasco for me. Suffice it to say that I didn't get to run mod really because no one else was running mod, all 12th stock and TC stock. I just got back from practicing and my times were really good compared to James Arnold and Bob Schonoeu's stock times from saturday. Fastest laps were 11.6's and average lap was 12.1 compared to their 12.4's and 12.8 ave lap. Sagei told me tonight that he wants to run 12th mod and when Johnny Socko gets up here then he will make the third person and there is one other guy who wants to run 12th mod so we will have a class. Oh boy! A bit of bad news was that I was consistently dumping all of a sudden tonight at the 6.5min mark! Guess what it is? Yep, my Quantum Competition is giving up the ghost and running very hot. So now I get to take advantage of their exclusive "Life Time Warranty" and send it in for free repair or replacement. I don't mind really because I have another brand new in the package for my spare and I don't have to pay for this one being fixed. I guess 8 turns in 12th mod without the heatsink is still a bit much! This is what used to happen with my Novak's. They would start to get slow where every motor regardless of it being an 11turn or a 9 turn would run pretty much the same speed and I would dump! Novak's are good stuff but they didn't have Lifetime Warranty's. At least I could still tell the difference between my 8 turn and my 10 turn and both were still fast with my Quantum, I just stop making time!!! LOL I really do like my Quantum and I think they are one of the best on the market and the new Lifetime Warranty puts them over the top for me. I raced this thing since Aug of last year and ran 10's, 9's, and 8's through this thing and not one problem until today. When I changed the punch settings it made noticable differences and the brakes are strong and differences are also noticable when you change their strength settings. What ESC is everyone else using? How was everyones race/practice day? Dave S how did that new core motor work compared to your Ti? What were the Core's characteristics compared to the Ti? Maybe, I say again MAYBE, I might make it up there to race Mitch and you guys in between the Indy Race and the Carpet Nats. So that's like 2wks from now Since Indy is next week and the Carpet Nats is 10days after that. Boy that will be tight huh? We'll see.
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Old 02-26-2002, 03:36 AM   #618
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can I just say ****!!!!!!!!!!!!!!!!!!!!!!I was already to go get my new Quantum Comp. to snap into my new Spashett and then I read your post Dave. If they cant last in a 1/12 I just cant deal with that. I have heard that if you dont run the CAP and you run the HEATSINK they dont ever get warm. HMMMMMMMM I dont know what I am going to do know oh well.
IKE
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Old 02-26-2002, 03:38 AM   #619
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Hey Foams what's up? We are not suppose to be up this late you know. LOL You shouldn't have to do anything to your body IE using the extra spoiler. Yeah I know what you mean about taking your time. Finally this time I did that with my 12th and it took me something like 2hrs just to sand and file and glue the chassis alone but when I was done it was the best I have ever done by far.
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Old 02-26-2002, 03:49 AM   #620
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Foams- They DO last. I run about 2-3 times a week plus I run all of the US Triple Crown Races (five). At big races like these we tend to put as much wear and tear on our stuff as 3wks of running at home! The Open practice day tends to be worth 5runs and then the Local Club race that night at a big race is another 4runs and then 3-5 practice runs the next day before qualifying and then 4 hard qualifiers with 2-3 practice runs at night after the qualifiers and then a main!!! Whew, a lot of runs are made at the big races! So if you add up all of this running it's more like a years worth for most people! Also, what other company has a lifetime warranty? If LRP didn't have this warranty I would have to pay for my repairs. Also, I ran the big cap up until 5wks ago and now run the small cap but I have never run the heatsink but will now start. Also, most people run how many turns in their 12th's when they run mod? I gues 13turns, probably 12turns, MAYBE an 11turn? I don't own an 11turn, I run 10's, 9's, and now 8's. I'm starting to realize that this is some motor and its surprising that I haven't had any problems to this point. What do you think Foams?
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Old 02-26-2002, 03:50 AM   #621
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I usually polish everything to a mirror finish before I install it(turnbuckles, pivot balls, ball studs, hingepins) and then get it all together and it will roll past a pinewood derby car.
IKE
P.S. Dreaming of my Spashett edition is what is keeping me up at this hour WHATS YOUR EXCUSE???????hehhehehe
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Old 02-26-2002, 03:53 AM   #622
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Foams- Actually admiring my Spashett edition that I just ran hehehe LOL, LOL, LOk, oops that should be LOL, hehehe.
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Old 02-26-2002, 03:56 AM   #623
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Dave,
I would love to chaulk it up to a FLUKE but the thing is I have heard this from a few guys. The owner of my local off-road track just put a Quantum in his 2wd mod buggy I guess I will see whether or not his lasts a lil while. Most of the guys around here that used to run 1/12 ran like 12/6 and 12/4 motors in their twelves and they said they were out of control with 4-cells. You gotta be one of the big dogs to be running single digit mod motors in your twelve. Cyrul and Spashett do it and they dont fry their Quantums, so I am guessing that you just got a funny one or something. Like I said I talked to an LRP team driver tonight and he said that if you run the small cap and the heatsink you will have no problems. We have guys up here running mod sedan(7x2) and they arent smoking their Quantums. Then I look in RCCA and see that Josh has the BIG CAP on his Quantum in his twelve. So, I guess I dont have an answer for ya on this one, just speculation. I think the selling point for me will be how LRP treats you and this repair on your Quantum, that will dictate to me whether or not I go ahead and get one.
IKE
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Old 02-26-2002, 04:00 AM   #624
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I bet I am typing this as you are typing your reply to my last post. I really hope that 1/12 gets back on its feet up here, when I was talking with a buddy of mine tonight that used to run the twelves he said that the guys that used to bring their twelves with them to the track when they raced TC(just in case enough guys showed to race 1/12) sold THEIRS!!!!!!. So, that means that it will be an entirely new group of people buying new cars and getting into it. That is alot of pressure on my wallet(not really but if it doesnt take off I will have a car and not a class to race it in) I guess I will just have to be the ambassador of TWELVES up here and see if I cany create an uprising or something.
IKE
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Old 02-26-2002, 04:04 AM   #625
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damn I must be tired I just changed my SIG. Hehehehhe sure does seem to piss people off that I insist on running foams on my TC's.
IKE
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Old 02-26-2002, 04:07 AM   #626
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I'm not a big dog but I'm working to be one. I qualified and finished 21st at last year ROAR Carpet Nats in 12th mod and qualified for the Worlds this year. I am currently 18th in the US Triple Crown Series. I picked up about .4/lap with my Trinity car so hopefully I can put it all together and run well at Indy and this years Carpet Nats. I am hoping to make the Norrca Nats up in Minnesota this year and also make the Worlds. I try to Gain Information, Understand, Apply and Practice, and then do it all over again until I can Apply it at the big races consistently. That's why I don't get bent out of shape about not racing club races. For me the big races satisfy that although it would be a lot of fun to club race every week running 12th mod. Thanks for the info, I will definately run the heatsink on the new one in my bag and I like the 10sec extra runtime that the small cap seems to give so I think I will stick with it since it feels nearly as good as the big cap which I ran up until several weeks ago.
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Old 02-26-2002, 04:11 AM   #627
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how many farad and what voltage is the little cap? I have found out some neat tricks by varying the voltage on these things and by buying certain ones.
IKE
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Old 02-26-2002, 04:20 AM   #628
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Foams- Interesting that you say these things because Brian Jucha and I just spent the last 3hrs talking about this very subject! It seems basically that in general people want us to run what they run and don't seem to mind that we may not want to!! This past Saturday I got to the track just before they started racing and they had changed the layout! Then one of the guys starts ribbing me and announces out loud that I said I would "lay it down" on all of them running 12th stock. What I had actually said earlier that week was that I would run their lap times. Now I have to run a stock motor which I really hate doing because they are so slow compared to mod. So I borrow a stocker and with NO practice on the new layout, with Powers GTR batteries in my car (I had already started charging them for a mod run) and my Quantum still on punch mode 3 for mod and no changes to my car (magenta fronts) and a borrowed stocker I went out and qualified 3rd only 6 sec behind Bob Schoenoeu and 5 sec behind James Arnold and that was with being put on my lid by someone I was lapping that cost me a few seconds!!!! Afterwards I took out the stocker and gave it back and they THEN told me that I couldn't run mod!!! So I said, "Hey I understand and I don't want to mess up their runs, can I run in between rounds for 8min like I normally do?". Guess what? I was told NO!!! They later recanted and let me run 1 run in between rounds to which I was thankful. And that was it, I spent the rest of the evening cutting peoples comm's for them and dyno' ing their motors!!!!
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Old 02-26-2002, 04:24 AM   #629
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Foams- Great question about the values of the cap(s) but since LRP coats them with blue paint I don't know what they are. What secrets have you found about varying the values up or down? Thanks
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Old 02-26-2002, 07:34 AM   #630
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OK it that time of year to get ready for the Speedworld Cup. We need to get all of us Pro 10 and 1/12th drivers out with their cars make the turn out bigger. We need to show that we still count. We need a good car count.

I be out their with my Pro 10 Mod and 1/12th stock for the race but we need to make sure we have 10 cars or they will not run the class.

I know some of you want to run stock Pro 10 and some wants to run Mod 1/12th. Myself I want to run Mod 1/12th but the only class is stock so I will run it. We need other to do the same and get the count up. I know the SoCal group want to run Pro 10 Stock and they do get 10 to 20 cars down there.

So the racers from SoCal come on up and have fun running mod with us. Then we will come down for one of your races hope in May or Sep after the Natís with a group.

The key is to grow the class. To show how much funnier is to run pan cars then TC.

So get your entry in as fast as you can so we can have a class.

Entry is here http://www.speedworldraceway.com/swr_cup_2002.pdf
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