BMI's DB12R
06-27-2008, 06:47 PM
#5026
nice body, i love the colors!
06-28-2008, 07:59 AM
#5027
the 1st one being the quicker one @ the recent SummerShoot Out R2
Summer Shoot Out R2 / Chesterfield setup
FRONT
.022 BMI Linear Front Springs DB2101
No Oil on kingpin
3.5mm Ride Height
5' Castor blocks / teflon washer either side
Camber, set run foams flat
0' Toe
Laid Down Servo / Sanwa 141
REAR
Connected Chassis Side Wings
C12 Hot Bodies Shock / Hara Medium spring / 30wt Oil
Shock Length to give approx 1-1.5mm pod droop
Kit ball studs plus 1mm shim on motor pod removed
0.070 flex plates (DB3010)
Tubes in rear position / 5000wt Oil in tubes
3.5mm Ride height
172mm wide
MISC
front tyre Jaco Prism Lilac
rear tyre Jaco Prism Pink
Jack the Gripper, Full front/rear
Cells = Middle
Parma Zytec
Nosram 6.5s on 40mmpr (give or take 0.5mm))
Nosram Evo esc 2-2-0-0
StromForce 4600 EnerG SC4600
Front
AE front end, angled servo, 5deg reactive castor blocks, 0.022" BMI springs, 1.5deg camber, two washers back (6deg static castor), smidge of toe out (technical unit of measure for a tiny little bit!) 5000wt oil on kingpins, Jaco Lilac, 70% additive. 4mm ride height.
Rear
Red spring, 40wt oil (must get some 35wt!), 1mm droop, pod level, 1mm spacer under front ball stud; 5000wt in side dampers, batts back, 0.066" L plates, Jaco pink, 100% additive.
Other
Parma Zytek body, EnerG 4600 cells, LRP Sphere (2,3,0,0), LRP 6.5BL (sintered rotor), Jack the Gripper additive, no receiver pack
quote from the race report
There were also quite a few BMI DB12Rs to be seen
Jason Butterfield following him up into the A final. This made 3 Corallys, 2 Associateds, 2 Hot Bodies and one BMI in the final,
Glenn Atterton in 10th and Pete Winton in 11th, both with BMI cars, Tom Lau & Nick Daman also running the car
Jason Butterfield following him up into the A final. This made 3 Corallys, 2 Associateds, 2 Hot Bodies and one BMI in the final,
Glenn Atterton in 10th and Pete Winton in 11th, both with BMI cars, Tom Lau & Nick Daman also running the car
Last edited by radio_car_racer; 09-10-2008 at 06:37 AM.
06-28-2008, 05:40 PM
#5028
Just got in the SE car today for one of my customers! Very nice looking, I look foward to seeing it built. The blue is darker then it looks in the pics.
06-28-2008, 06:44 PM
#5029
big thanks to BMI for all the help this weekend and the opportunity to run the DB10R. my 12R was awesome all day. I had a little bit of a hard time getting the gearing right since it was my first time running brushless in a 12th car but when the main came around i was swapping from 1st to 3rd for the entire 8 minutes. in the end i was able to close a 6 second gap down to one but couldnt pull off the win. the new linear springs worked great and the lowered pods helped get everything i could out of the tires.
heres my setup
Front:
.20 linear springs
10 degree caster blocks (white washers split)
7,000K cst kingpin lube (1/8th buggy diff oil)
Servo flat and all the way forward
Purple fronts 1.68 size
3.5 mm ride hieght
Rear:
20,000K cst damper tube lube
red center spring w/ 40wt. shock oil
Battery: middle hole brace and middle hole chassis
stock flex plates
Novak 4 cell GTB
10.5 motor geared 34/88
3.5mm ride height
protoform speed 12B body
Grey Rears 1.70-1.171 size
car was awesome and i cant wait to run it again. Thanks J and the whole BMI team
heres my setup
Front:
.20 linear springs
10 degree caster blocks (white washers split)
7,000K cst kingpin lube (1/8th buggy diff oil)
Servo flat and all the way forward
Purple fronts 1.68 size
3.5 mm ride hieght
Rear:
20,000K cst damper tube lube
red center spring w/ 40wt. shock oil
Battery: middle hole brace and middle hole chassis
stock flex plates
Novak 4 cell GTB
10.5 motor geared 34/88
3.5mm ride height
protoform speed 12B body
Grey Rears 1.70-1.171 size
car was awesome and i cant wait to run it again. Thanks J and the whole BMI team
06-28-2008, 06:46 PM
#5030
in the next few days you can see the pictures from the 2nd round of the Florida Carpet Cup on www.rcactionpics.com
06-29-2008, 03:50 AM
#5031
Nice run Leon. I had a blast running again with you guys. You were hands down the fastest 1/12th and 1/10th. I wish robbie would have stuck around for the main in 1/10th. He wouldnt have had a chance.
You and mike had a killer race. You should of had it bro. You were fast all day.
You and mike had a killer race. You should of had it bro. You were fast all day.
06-29-2008, 10:26 AM
#5032
Screws
I have full sets being made for both 10th and 12th BMI cars and will be ready very soon. They will come in red, blue, or purple. I will put them up for sale as soon as they are ready.
06-29-2008, 10:33 AM
#5033
spud definitly keep us updated. you can throw me down for purple
06-29-2008, 11:16 AM
#5034
06-29-2008, 08:37 PM
#5036
Holy Crapshaith! This is one great car (12r) ! Today was my first day running the 12r and I could not be more thrilled with it. I know NOTHING about setting up a 1/12th scale car. I just built it by the book, threw on some 22 front springs, set the ride height and hit the asphalt. I expected to have to get some help from other racers who have some experience with 1/12th stuff, but this was not the case. The car just gets the job done period.
To anyone reading this thread that night be on the fence about trying this car, get of the fence and get on a BMI!
To anyone reading this thread that night be on the fence about trying this car, get of the fence and get on a BMI!
06-29-2008, 10:17 PM
#5037
Well I just finished re-wiring the motor wires on my DB12R 
I really didn't like the motor wires on the BL going over the battery...it just made it difficult to get the battery in and out of the car. So I decided to see if I could make them run under the battery like I did with the brushed motor. Since everything runs up from the center pivot it looks like there should be no tweak issues from the wires. The only down side is I cannot put the battery in the farthest back position or the wires will bind on the battery. The car was working great before...I'll find out in 3 weeks if I did anything to mess it up 
I really didn't like the motor wires on the BL going over the battery...it just made it difficult to get the battery in and out of the car. So I decided to see if I could make them run under the battery like I did with the brushed motor. Since everything runs up from the center pivot it looks like there should be no tweak issues from the wires. The only down side is I cannot put the battery in the farthest back position or the wires will bind on the battery. The car was working great before...I'll find out in 3 weeks if I did anything to mess it up
06-30-2008, 04:53 AM
#5038
Tech Adept
I have been finding this year that adjusting the dampening has 3 affects. One is that it mimicks what the flex plates do in that stiffer = less rear bite and softer = more rear bite. Second, it affects the weight transfer, stiffer = less and softer = more. Third it affects the rate of weight transfer, stiffer = slower and softer = faster.
Now the funny thing is that the way this can all make the car drive or "feel" can be very interesting. On low bite for instance a softer rear setup (damper lube and flex plates) will:
-give more traction
-give more steering (because weight is being allowed to transfer thereby transferring more weight to the front end for more steering)
Whereas a stiffer rear setup in the same situation will make the car push while having no rear bite. The stiffer rear setup will seem docile, smooth and easy to drive as it pushes going in to the turn but it may spin unsuspectingly in the middle of the corner because the rear couldn't transfer enough weight.
Now take this exact same scenario but put it in high bite and the car will feel like the opposite is happening. The softer rear end setup will not want to traction roll (as easily) and will drive easier because the softer setup is "absorbing" the load easier. The stiffer setup will feel "twitchy" and want to traction roll because it can't "absorb" the G-forces at a slow enough rate and thus transfers them more instantaneously through the chassis. Of course these are all generalizations but you get the idea. Now if anyone else has found different please chime in as it is more important to get to the truth than for me to be "right". I've been wrong before and if I continue living it will happen a whole bunch more.
Jason notes that you always want to match your spring with your dampening, the flex plates are our rear springs and the damper tubes are our "dampers". Thus if you go stiffer in flex plate you should go stiffer in damper lube and vise versa.
HTH.
I only wish I had learned this stuff a lot sooner than this racing season.
Now the funny thing is that the way this can all make the car drive or "feel" can be very interesting. On low bite for instance a softer rear setup (damper lube and flex plates) will:
-give more traction
-give more steering (because weight is being allowed to transfer thereby transferring more weight to the front end for more steering)
Whereas a stiffer rear setup in the same situation will make the car push while having no rear bite. The stiffer rear setup will seem docile, smooth and easy to drive as it pushes going in to the turn but it may spin unsuspectingly in the middle of the corner because the rear couldn't transfer enough weight.
Now take this exact same scenario but put it in high bite and the car will feel like the opposite is happening. The softer rear end setup will not want to traction roll (as easily) and will drive easier because the softer setup is "absorbing" the load easier. The stiffer setup will feel "twitchy" and want to traction roll because it can't "absorb" the G-forces at a slow enough rate and thus transfers them more instantaneously through the chassis. Of course these are all generalizations but you get the idea. Now if anyone else has found different please chime in as it is more important to get to the truth than for me to be "right". I've been wrong before and if I continue living it will happen a whole bunch more.
Jason notes that you always want to match your spring with your dampening, the flex plates are our rear springs and the damper tubes are our "dampers". Thus if you go stiffer in flex plate you should go stiffer in damper lube and vise versa.
HTH.
I only wish I had learned this stuff a lot sooner than this racing season.
07-01-2008, 01:47 AM
#5039
Tech Master
iTrader: (18)
Join Date: Sep 2005
Location: The Apocalypse suburb of Robina
Posts: 1,738
Trader Rating: 18 (100%+)
Jas,
my spacers arrived, dumb ass question.......but which way do they go in?
my spacers arrived, dumb ass question.......but which way do they go in?
07-01-2008, 04:00 AM
#5040
Holy Crapshaith! This is one great car (12r) ! Today was my first day running the 12r and I could not be more thrilled with it. I know NOTHING about setting up a 1/12th scale car. I just built it by the book, threw on some 22 front springs, set the ride height and hit the asphalt. I expected to have to get some help from other racers who have some experience with 1/12th stuff, but this was not the case. The car just gets the job done period.
To anyone reading this thread that night be on the fence about trying this car, get of the fence and get on a BMI!
To anyone reading this thread that night be on the fence about trying this car, get of the fence and get on a BMI!