R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 04-06-2009, 03:23 AM   #7276
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,829
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by BIGBOT View Post
Is #3 sure lube the same as 30000 wt diff oil?
No, i would say it is more like 10,000
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 04-06-2009, 08:50 AM   #7277
Moderator
 
Clegg's Avatar
 
Join Date: Jan 2004
Location: Outside doing things in places... Denver, CO
Posts: 4,609
Trader Rating: 9 (100%+)
Default

So this last week I was practicing and I had a small tap to one side and caused a pretty catastrophic breakage as I busted one of the flex plate ball cups in half. Now this is obviously a part that my hobby shop doesnt stock, so I had to become creative or I would be out of the running for the rest of the weekend since the car is undriveable without both flexplates attached.

So I dug through my parts boxes and found (this is all happening at the track ) a old T bar ball holder for the front and rear pivot balls ona Tbar car.

I compared and it is the same size ball, and almost the same hole spacing as the bespoke BMI ball holder.

So after some quick measuring, cutting,reaming, file'n, I ended up with something that while not pretty, worked almost as good as the factory ball holder. Infact I led 1/3 of the race with this car, and nailed one of the qualifiers.

Some pics of this monsterous hack I dont plan on running it again as I have the proper parts on their way to me... but just thought you folks would find this hack interesting

(the reason for the 2 different bolts is I needed more clearance on the one side which I still dont think was enough.
Attached Thumbnails
BMI's DB12R-img_3831.jpg   BMI's DB12R-img_3834.jpg  
__________________
Joe Kelly - JK720.net
5280 Raceway |5280raceway.com | 5280 Raceway Facebook
Clegg is offline   Reply With Quote
Old 04-08-2009, 07:02 PM   #7278
Tech Fanatic
 
xtrememadness's Avatar
 
Join Date: Feb 2006
Location: new jersey
Posts: 954
Trader Rating: 1 (100%+)
Send a message via AIM to xtrememadness
Default

hey jason whats up. havent been on here lately due to our track closing down and no where to run my db12rr so its out door rubber sedan and some offroad until we find another track. anyway i have a chassis question for you. i just recently recieved a tc5 itf chassis which is 2.0mm compared to the standard 2.5mm the countersink is too deep which in turn makes the holes too large. so i sent it back to associated and they sent me a new one with the exact same problem and they seem to think that there is no problem. so my question is is it not possible to countersink a 2mm chassis without the countersunk part of the screw sticking through the chassis? should i just countersink a relief in the bulkheads or do you think the chassis is defective? thanx jason i appreciate the help.
__________________
CRAIG SANTRY / TAMIYA / TEAM ASSOCIATED / BROWNIES PRO AND SPORT HOBBIES / STATEN ISLAND SPEED TEAM / FUTABA / LRP / TEKIN / PROTOFORM / JACKSON RC / HORSHAM RC / EXOTEK RACING / REEDY
xtrememadness is offline   Reply With Quote
Old 04-09-2009, 12:02 AM   #7279
avs
Tech Master
 
avs's Avatar
 
Join Date: Jul 2006
Posts: 1,175
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by protc3 View Post
I would go to 10 degree blocks up front w/ 4 degrees of static caster. Go to the angled servo mounting and change the tires to 2x pink front and rear. Maybe 50 wt. oil in the center shock. The rest i would keep the same until you feel out the track
Hey Jason, thanks for the suggestions.

i saw your reply but wanted to try the changes before responding. well the shortened flex links and heavier shock oil (35 to 50) really did the trick. i ran the car in practice tonight and was finally able to take the high speed sections without having to back off because of the car. (now i only back off because of my nerves!)

something i noticed about the car setup is that after shortening the flex links, the car was tweaked, (a little more than half a bubble off)however this tweaked condition seemed to be an outcome of the preloaded flex links. your assembly instructions avoid this preload condition because the flex links are attached to chassis before attaching the pod.

so in order to change the forward flex attachment, should you either disconnect the pod or be careful to torque down the forward link attachments each a little at a time, keeping the pod aligned to the chassis. i thought it would be more work to disconnect the pod but maybe it is the preferred method? (less fiddlling overall to get a tweak free pod?)
avs is offline   Reply With Quote
Old 04-09-2009, 03:30 AM   #7280
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,829
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by avs View Post
Hey Jason, thanks for the suggestions.

i saw your reply but wanted to try the changes before responding. well the shortened flex links and heavier shock oil (35 to 50) really did the trick. i ran the car in practice tonight and was finally able to take the high speed sections without having to back off because of the car. (now i only back off because of my nerves!)

something i noticed about the car setup is that after shortening the flex links, the car was tweaked, (a little more than half a bubble off)however this tweaked condition seemed to be an outcome of the preloaded flex links. your assembly instructions avoid this preload condition because the flex links are attached to chassis before attaching the pod.

so in order to change the forward flex attachment, should you either disconnect the pod or be careful to torque down the forward link attachments each a little at a time, keeping the pod aligned to the chassis. i thought it would be more work to disconnect the pod but maybe it is the preferred method? (less fiddlling overall to get a tweak free pod?)
I just loosen all of the screws that attach the flex plates and retighten them while the shock is detached. I can feel if there is binding. THey should reallign themselves easily.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 04-12-2009, 09:57 PM   #7281
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,179
Default

Well I decided it was time for a new toy for my DB12RR and just ordered the JR3650 digital servo I've had so many good servos left over from "back in the day" that I haven't bought a new one in years...so this will be my first digital servo
InspGadgt is offline   Reply With Quote
Old 04-13-2009, 05:59 AM   #7282
Tech Adept
 
Join Date: Jan 2008
Posts: 143
Trader Rating: 9 (100%+)
Default

Are any of you guys running a single cell lipo setup in your cars (1/10th 13.5 or 1/12th 10.5) if so how do they compare to 4cell nimh? At the track where I race we are running 4cell nimh but good packs are getting hard to find.
Thanks for all your help
BIGBOT is offline   Reply With Quote
Old 04-13-2009, 05:03 PM   #7283
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,766
Trader Rating: 87 (99%+)
Default

Quote:
Originally Posted by BIGBOT View Post
Are any of you guys running a single cell lipo setup in your cars (1/10th 13.5 or 1/12th 10.5) if so how do they compare to 4cell nimh? At the track where I race we are running 4cell nimh but good packs are getting hard to find.
Thanks for all your help

I've been running the 1s for the last three race days in my DB12R with the Tekin RS, TQ booster, and an orion 13.5. Two of those days on med sized outdoor asphalt track and one outing on a smallish carpet track. On the asphalt I'm a touch slower than 17.5/nimh, and on the small carpet track I had the hero lap untill the main when I was bested by .01sec.

I'm still working out the bugs and trying to find the right esc/radio settings and gearing but so far I prefer my 17.5 and A123 cells combo. Weight is about the same with A123 cells as with the 1s lipo but the lipo has a much softer feel.

I'm just finishing up building my new DB12RR so I'm looking forward to trying both setups in the new car.
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 04-16-2009, 08:23 PM   #7284
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,179
Default

Well maybe I should have researched the servo a bit more I like the adjustment pot setting I read about on another thread but didn't realize the z3650 won't just bolt right in. So it's either drill a hole to extend the slot on one side or make an extender piece for the servo mount...Not sure which I'm going to do yet but I'll figure something out
InspGadgt is offline   Reply With Quote
Old 04-16-2009, 08:59 PM   #7285
Tech Master
 
Join Date: Jan 2004
Location: Wisconsin
Posts: 1,620
Trader Rating: 17 (100%+)
Send a message via AIM to Kave
Default

Quote:
Originally Posted by InspGadgt View Post
Well maybe I should have researched the servo a bit more I like the adjustment pot setting I read about on another thread but didn't realize the z3650 won't just bolt right in. So it's either drill a hole to extend the slot on one side or make an extender piece for the servo mount...Not sure which I'm going to do yet but I'll figure something out
Servo tape it in, that will be the easiest.
__________________
Kevin Van Ert | MFR | CRC Racing | Team Scream Racing | Hobbywing | Xenon USA | Dumpers Speed Shop | Genesis RC | Race Rewards | Lake Superior RC Car Club | www.lsrcc.com
Kave is offline   Reply With Quote
Old 04-17-2009, 06:35 AM   #7286
Tech Master
 
Join Date: Jan 2007
Posts: 1,054
Trader Rating: 10 (100%+)
Default

jason when are we running some carpet again????
__________________
Leon McIntosh
PRO-LINE--XRAY--RCAmerica--FX Engines--NitroPro Fuel--Kustom R/C Graphics--Schelle Racing

******* DialedSetups.com ****** Check it out!!!!!
punkracer24 is offline   Reply With Quote
Old 04-17-2009, 09:34 AM   #7287
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,829
Trader Rating: 13 (100%+)
Default

Hopefully soon. I got the itch
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 04-17-2009, 10:54 AM   #7288
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,179
Default

Quote:
Originally Posted by Kave View Post
Servo tape it in, that will be the easiest.
If I were going to run it flat I would Shoe Goo it in...I've been running a flat servo since getting the car though and want to try an angled servo setup.
InspGadgt is offline   Reply With Quote
Old 04-18-2009, 04:43 PM   #7289
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,179
Default

Well a little creative work with a drill press and the servo is in there Just had to extend one of the slots slightly and drill a new hole for the inside mount. I knew that drill press would come in handy some day
InspGadgt is offline   Reply With Quote
Old 04-18-2009, 10:05 PM   #7290
Tech Elite
 
SpraydbySprague's Avatar
 
Join Date: Jun 2008
Location: Conducting aggressive board meetings at my local track
Posts: 3,301
Trader Rating: 64 (100%+)
Default

Quote:
Originally Posted by protc3 View Post
Hopefully soon. I got the itch
Uh, whatever you got. There's probably an ointment for it. Sup Jason!
__________________
How would I describe my holeshots?

Three words...

Ready... Steady... Confetti!!!! (gonna need a new one of those)
SpraydbySprague is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
NEW IN BOX BMI DB12R bigb11 R/C Items: For Sale/Trade 47 10-09-2008 04:36 PM
-BMI DB12R- joey R/C Items: For Sale/Trade 11 05-18-2008 09:25 PM
BMI DB12R wallstreet R/C Items: For Sale/Trade 17 02-15-2008 05:04 PM
BMI DB12R D-Bizzle R/C Items: For Sale/Trade 2 12-21-2007 03:48 PM
WTB BMI DB12R chris moore R/C Items: Wanted to Buy 8 06-29-2007 06:25 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 05:43 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net