3LikesBMI Racing "Copperhead 12" discussion and support
05-21-2013, 05:39 PM
#2567
Recently promoted my CH12 to primary race car after struggling with an inline car for too long. It has been running really well, much better than the other car, but I have a problem with mid-out steering. We run CRC carpet that was recently cleaned using a protocol from CRC, and the bite came up a lot. I am running .020 front springs, 5' reactive caster, 3.8' caster, .5' toe out, .010 droop, 1' camber, soft links in the firm position, 30 wt oil with a red AE spring, tall IRS ball stud in front, Short with 1mm spacer rear, 1mm droop, #3 Shurlube on kingoins and tubes. Most guys are running one brand or another of pink rears and magenta or double pink fronts, but my car seemed best on Ulti J hard fronts and X medium rears, full paragon 30 minute rear and 15 minute fronts. With this set up it was very good for 4 minutes but picked up a slight push center-off around then. Switched to Enetti yellow rears and black fronts and the car was best ever early in practice, but by the first qualifier the car pushed horribly, so I went back to the Ultis. Anyone know how I can add a bit of steering center-off?
05-21-2013, 06:22 PM
#2568
Recently promoted my CH12 to primary race car after struggling with an inline car for too long. It has been running really well, much better than the other car, but I have a problem with mid-out steering. We run CRC carpet that was recently cleaned using a protocol from CRC, and the bite came up a lot. I am running .020 front springs, 5' reactive caster, 3.8' caster, .5' toe out, .010 droop, 1' camber, soft links in the firm position, 30 wt oil with a red AE spring, tall IRS ball stud in front, Short with 1mm spacer rear, 1mm droop, #3 Shurlube on kingoins and tubes. Most guys are running one brand or another of pink rears and magenta or double pink fronts, but my car seemed best on Ulti J hard fronts and X medium rears, full paragon 30 minute rear and 15 minute fronts. With this set up it was very good for 4 minutes but picked up a slight push center-off around then. Switched to Enetti yellow rears and black fronts and the car was best ever early in practice, but by the first qualifier the car pushed horribly, so I went back to the Ultis. Anyone know how I can add a bit of steering center-off?
Run an AE Blue center spring. Nobody runs much stiffer than that on any 1/12 car.
Make you side links long. The car needs to roll to generate grip.
Use tube lube aroud 7k to 10k. BMI tubes are more precise and tight than others. Running the same damper lube as CRC guys would be too thick.
Ulti X Mediums are very close to Jaco Magenta. I would suggest running Magenta or X-Med all around. Ulti J's are asphalt tires and are not the best they offer on carpet.
Don't sauce the rears as long. They may be warming up mid race and causing your push. The stiff rear would contribute to this heating. Sauce both ends for 10 min.
Reduce your caster to around 2deg.
Run the 10 deg reactive caster block.
Increase negative camber to 1.5 to 1.75deg.
I would do this all at once and start with this as a base setup.
05-21-2013, 06:31 PM
#2569
Thanks
05-21-2013, 07:16 PM
#2570
Protc3 please check your pm.
08-11-2013, 03:36 PM
#2574
10-07-2013, 07:02 AM
#2575
Is anyone else having problems with the bmi website? I cant seem to login or view any of the products.
10-07-2013, 11:43 AM
#2576
10-10-2013, 12:09 PM
#2578
Nice to see some life in this thread. Now we just need to convince Jason to get back in the game full bore !!
I just recently bought a used DB12R and although I've known about BMI for years I never owned one of his cars. Now that I have 1 I want more !!
If anybody has a DB12RR, Copperhead 12 or any of his 10th scales for sale please feel free to PM me.
Jason, you won't remember but I called recently asking for some advice on 12th scale asphalt racing. Great conversation and the advice was much appreciated.
I just recently bought a used DB12R and although I've known about BMI for years I never owned one of his cars. Now that I have 1 I want more !!
If anybody has a DB12RR, Copperhead 12 or any of his 10th scales for sale please feel free to PM me.
Jason, you won't remember but I called recently asking for some advice on 12th scale asphalt racing. Great conversation and the advice was much appreciated.
10-11-2013, 08:18 PM
#2579
Nice to see some life in this thread. Now we just need to convince Jason to get back in the game full bore !!
I just recently bought a used DB12R and although I've known about BMI for years I never owned one of his cars. Now that I have 1 I want more !!
If anybody has a DB12RR, Copperhead 12 or any of his 10th scales for sale please feel free to PM me.
Jason, you won't remember but I called recently asking for some advice on 12th scale asphalt racing. Great conversation and the advice was much appreciated.
I just recently bought a used DB12R and although I've known about BMI for years I never owned one of his cars. Now that I have 1 I want more !!
If anybody has a DB12RR, Copperhead 12 or any of his 10th scales for sale please feel free to PM me.
Jason, you won't remember but I called recently asking for some advice on 12th scale asphalt racing. Great conversation and the advice was much appreciated.
