Is a receiver pack really necessary for modified 12th scale racing? And if so, how many mAh's? Motor would be Orion Vortex 2008 7,5T.

Carpets in the Uk tend to be meduim grip at the very best and Jaco yellows and Lilac/d/pink fronts are perfect choice.

Look on the Team CRC website on the front page. They are going to release a new 12th scale rear that will be a yellow with a grey band on the outside.

www.teamcrc.com

If that means the tyres have two compounds on the same wheel, they are not legal for BRCA, EFRA and IFMAR racing. Those tyres can't be used in UK Nationals.

The Rule was brought in to outlaw wraps, and so keep costs down. HTH

Just love when they come out with something new and give it a old name.

1/12th Yellow compound Med-soft shore, long-wear.

Some of us old timer see yellow compound we thing back in the day of Very Soft shore and Fast wear. It would be a one run tire with a ton of grip.

I think you thing of the JACO 1/12th 2stage where you had a harder non useable inner tire. Then on top you had the other compounds like pink.

The CRC and BSR tires have the form next to each other, plus the cost the same.

Most stop using the 2stage because they did not get the life out of the tires like they can now. We run are tires close to the rim and you can not do that with 2stage.

So they are two different type of tires.

I just need a little help. Whats the normal roll out for 17.5, 13.5 and 10.5 BL motor on a medium carpet track? Just so I have a starting point. And what are the current shore ratings on 12th tires. I listed the tires below. It's been a few years since I last raced and all my notes for tires on my local track is by shore ratings and my motor notes are for brushed motors.

Rears
White
Yellow
Gray
Pink
Magenta

Fronts
Magenta
Double Pink
Lilac
Purple
Black

I also forgot to ask. I heard that some batteries made in the last year were just garbage. Were they IB's? What batteries have good durability? Thanks.

I've primarily been running 17.5T 1/12th. I'd recommend starting at a 84mm rollout. The gearing will depending on motor model, esc model and track layout. I'll defer to someone else for 13.5T and 10.5T rollouts.

Tire compounds are different depending upon which manufacture you pick. BMI has a Jaco shore rating chart posted online: http://bmiracing.com/bmiv4/index.php...d=15&Itemid=30

On carpet I've been running Jaco yellow rears (w/ the rim/foam seam glued) and either Jaco Magenta (for club racing) or Lilac (for big events) fronts. On asphalt i've been running Jaco Magenta front and back. W/in the Parma camp, the most common rear tyre is Grey and people run Magenta or Purple up front.

As for batteries the EnerG 4600 have been GREAT! The new batch of cells have a white ring at the top of the battery. A lot of matches have great cells out there. I'd recommend looking at tqcells.com

Im a distributor of BSR in Poland, and we mostly use pink or white rears, and purple or black fronts.

Some drivers use xxpink fronts ( which are like crc magenta) but that’s combination for a high grip track and the use them with pink rears.

According to batteries , most drivers decided to use 4200IB batteries, and after that we changed for 4600 as they became evadible. But the firs packs were as some would say "rubbish". You were lucky if you could make two 4cell packs out of 12 cells. ( working cells not some super matched cells)
but that was just in order to get several extra seconds of run time.

Now when most cell have been improved i would rather recomend for 12 class 4600 IB. Or EnerG 4600 I have no opinion about them but can be worth of testing.


For a motor I would recommend 5,5 turns , or 4,5 because 5,5 might not be fast enough for some tracks. If you have a long “straight” you would get your ass kicked. Some drivers prefer to use low turn motors , even in order to save batteries, they claim the just don’t have to squeeze the throttle that much all the time.

Thanks for the 17.5 BL roll out it will put me in the ballpark to start. As for tires I just need the shore rating for the tires. I know purple has a 40 shore rating. What I really need to know is what color of rear foam is a 32 shore rating and a 35 rating. For fronts what has a 35 shore rating and a 37. Thanks.

Ophidian - the bmi web page has that info for jacos.

Prefect thanks for the info.

Quick question for you all guys,

Just getting into 12th, and have all of the TC electrics, including a Nosram Matric TC ESC. Now I know this will not fit in the car with the fan attached, but if I am to remove the fan, will the ESC fit and clear the shell?? (obviously prefer not to have to buy a new ESC!)

Thanks for the help,
Dan

The nosram is the same as the LRP spher comp TC, right? If so it depends on what you mean by"fit" . . . It would be possible to raise the body enough to get the esc under there, but the heatsink wont allow the body to sit as low as most racers prefer.