BMI's DB12R

[protc3]

Originally Posted by Chemical X

It's been done. Check out Brian Bodine's new Slapmaster which has 1/4" x 1/2" bearings.
http://www.rctech.net/forum/attachme...1&d=1204054112

He discusses it on post # 366 here. 12th scale gallery (Post your pics... body on and body off)

I did look into it and found that we lost alot of ride height adjustment.

[aca]

Thanks for the reply Adrian! Another question, is the 13mm rotor too much for 1/12 scale?

Allen

[EricF]

from what I've read about the 13mm rotor it would seem that it's not the best way to go for 1/12. It increases the cogging effect of the motor and also lowers the rpm and increasing the torque. But with that said... the real way to see what it does for you is test it on the clock and see.
E

[radio_car_racer]

Originally Posted by protc3

Hey Guys,

The front springs are complete and will start shipping on monday. I tried them on 2 styles of kingpins. I tried them on the stock kingpins and on IRS long 1/12th kingpins. The IRS kingpins give you more roll center adjustment than the stock ones but both work fine. You will just need to remove 2 shims from the top of the stock kingpins and you are set.I will be selling the springs as a kit with all 3 pairs and 1 set of retainers. I will also be offering the kit with the IRS kingpins if desired. They fit great and are preset so they will not collapse on you.

You don't say which Monday

can't find them in the store

[radio_car_racer]

Originally Posted by aca

Thanks for the reply Adrian! Another question, is the 13mm rotor too much for 1/12 scale?

Allen

Originally Posted by EricF

from what I've read about the 13mm rotor it would seem that it's not the best way to go for 1/12. It increases the cogging effect of the motor and also lowers the rpm and increasing the torque. But with that said... the real way to see what it does for you is test it on the clock and see.
E

post by Marcus Mobers on UK forum says,

First of all, Brushless is very very different from brushed motors. Usually with brushed motors when you gear lower you have more punch, less top speed, when gearing up, less punch, more topspeed.
This is not the case with Brushless...if your gear ratio is too low, you have zero punch and topspeed, same when it is too high, so its very important to find the right gear ratio.

Also, Brushless takes a lot of energy on fast open tracks, sometimes you will even have problems dumping on that kind of tracks. On small tiny technical tracks runtime is sure no issue.

I experienced that the 14mm bonded rotors are not good, simply no punch and the efficiency is bad. Daniel is right, when he says that a 14mm sintered rotor is more efficient, sure it is, and it has crazy torque. But one big disadvantage because of the strong magnet field is the braking effect off throttle. When you wanna gain runtime use that rotor with taking off all the automatic brake on your speedo.

I also tried the new LRP 12.5 and 13.0 sintered rotors. Very very good solution for 12scale. Its more driveable due to less torque and it rolls better off throttle. Ok, it has less runtime than a 14mm rotor......
With a 12.5 and 13.0 set your LRP/Nosram speedo on automatic brake program 1.

I usually run a 4.5 LRP motor...here are some good points to start with:

small tracks:
12.5 rotor = 28,00mm
13.0 rotor = 29,00mm
14.0 rotor = 30,00mm

big tracks:
12.5 rotor = 32,00mm
13.0 rotor = 33,00mm
14.0 rotos = 34,00mm

Hope this helps a little....try to find the rotor that fits to your driving style and have fun!
Markus

[protc3]

Originally Posted by radio_car_racer

You don't say which Monday

can't find them in the store

I will get them up there today. I was real busy yesterday and it slipped my mind.

[Chemical X]

Any update on the rear pod droop adjuster?

[protc3]

Website is updated with new front springs.


I will try to get back on the pod droop adjuster. We have been very busy and havent had a chance to complete it.

The super low rear pods are in production now. They are 2mm lower than the stock pod plates.

Hope i didnt miss anyone

[AdrianM]

BMI New Large OD Linear Springs are online now!

There new springs balance the front and rear roll rates in pan car chassis. They make the front roll more. This increases steering, corner speed and promotes more even tire wear.

They fill all 1/10th cars and 1/12th cars with 1/10th (or long IRS 1/12th) king pins. In 1/12th cars they must be used with modern large diameter rims like Jaco Prism's and Parma Pro 38's. You can use them with 1/12th king pins id you remove 2 shims above the upper pivot ball. This will slightly preload the springs and reduce droop range adjustment available but its good on most surfaces.

DB2100 .020" Linear Springs and perches (pair).
DB2101 .022" Linear Springs and perches (pair).
DB2102 .024" Linear Springs and perches (pair).

Note that BMI .020's feel close to AE .018's, BMI .022" are like AE .020 and so on...but they the BMI springs are smoother and maintain the same rate throughout their travel.

[InspGadgt]

Yay my DB12R is here!!!!! Can't wait to get home from the office and start building it

[xtrememadness]

very nice

[Ferrarimk13]

Originally Posted by hanulec

use the two screws towards the back of the chassis

thanks man

[radio_car_racer]

Originally Posted by AdrianM

BMI New Large OD Linear Springs are online now!

They fill all 1/10th cars and 1/12th cars with 1/10th (or long IRS 1/12th) king pins. In 1/12th cars they must be used with modern large diameter rims like Jaco Prism's and Parma Pro 38's.

Do you know if they'll fit inside the GRP rim?

ID is 1.32" / 33.65mm

[Scottrik]

Originally Posted by radio_car_racer

Do you know if they'll fit inside the GRP rim?

ID is 1.32" / 33.65mm

Note that in Adrian's announcement it says they must be used with modern large dia wheels. The GRP's are older style small dia rims and won't be appropriate.

[protc3]

the new springs work with standard 1/12th kingpins also. You just need to remove 2 of the kingpin shims.