R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 06-16-2009, 05:07 AM   #7441
Tech Master
 
PartTime's Avatar
 
Join Date: Mar 2008
Location: Sterling hts MI
Posts: 1,029
Trader Rating: 10 (100%+)
Default

Very nice. So is the wheel base shorten? How would it handle if some one strapped a 4cell in it?

DK
PartTime is offline   Reply With Quote
Old 06-16-2009, 06:25 AM   #7442
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,824
Trader Rating: 13 (100%+)
Default

We tested short vs standard wheelbase and the standard seemed to be overall better so we kept the same wheelbase. 4 Cell works fine but you do lose your for and aft battery adjustment. You also have the option of running the humps up or down on the lipo. With the humps down, it is flush with the bottom of the chassis. The car worked extremely well with the lipo and 4 cell. More catered to the lipo though as far as weight placement goes. We also found a lighter spring setup works better for lipo. We tested both the blue and gold and they seemed to be the ticket.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 06-16-2009, 06:56 AM   #7443
Moderator
 
Clegg's Avatar
 
Join Date: Jan 2004
Location: Outside doing things in places... Denver, CO
Posts: 4,608
Trader Rating: 9 (100%+)
Default

[QUOTE=tdu verney;5917936]
Quote:
Originally Posted by protc3 View Post
Hey guys,

I looked into the rear flex plate pivot housings and didnt find anything unusual about them. They are the same as they have always been and seem to be the same strength as our origionals. However, i will increase the wall thickness around the pivot balls being that there are some of you that are having problems with breakage. I will be making the new ones as of monday and will throw away the inventory i have now. The center pivot will not go through any changes as we found by strengthening it moved the breaking point to more expensive areas of the car. The rear pod took too much abuse when i beefed up the center pivot.

I was surprised to hear about this problem until it happened to me twice?
My research shows the fault is not the pivot housing but the set up! To light, and in a corner the rear slides the back end into the boards everytime with the new light weight 1s lipo.
For sure, without the weight of the 4 cells the back end unloads really quick and slams the rear wheel flat into the boards. The impact moves directly to the pivot ball in the housing. Believe me I've test the strenght of this car.
That may be it, I ONLY started breaking these once I put the LiPo in. hmm I thought dropping 6oz of weight would make parts less prone to breakage...
__________________
Joe Kelly - JK720.net
5280 Raceway |5280raceway.com | 5280 Raceway Facebook
Clegg is offline   Reply With Quote
Old 06-16-2009, 07:08 AM   #7444
Tech Master
 
PartTime's Avatar
 
Join Date: Mar 2008
Location: Sterling hts MI
Posts: 1,029
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by protc3 View Post
We tested short vs standard wheelbase and the standard seemed to be overall better so we kept the same wheelbase. 4 Cell works fine but you do lose your for and aft battery adjustment. You also have the option of running the humps up or down on the lipo. With the humps down, it is flush with the bottom of the chassis. The car worked extremely well with the lipo and 4 cell. More catered to the lipo though as far as weight placement goes. We also found a lighter spring setup works better for lipo. We tested both the blue and gold and they seemed to be the ticket.
So this will only be an update instead of two diffrent cars. Cool.

Thanks
DK
PartTime is offline   Reply With Quote
Old 06-16-2009, 07:25 AM   #7445
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,824
Trader Rating: 13 (100%+)
Default

The way it will be sold as just a chassis plate and will cost the same as the standard,or you can order your car with the lipo or standard chassis. When purchased in a kit the price will be the same reguardless of which you choose. So in a nutshell, if you are looking to purchase a car, you wont need to buy the car then add a chassis. You can get it any way you want it.

The chassis plates are actually coming off the machine complete today. They are now available if you guys would like to call in your order. Otherwise i will have them on the website tommorow. Thanks for your patience guys.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 06-16-2009, 09:57 AM   #7446
Tech Master
 
Join Date: Jan 2007
Posts: 1,050
Trader Rating: 10 (100%+)
Default

so what lipo do i need to buy that will fit in that chassis??



..sorry im a gas offroad guys
__________________
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 06-16-2009, 10:00 AM   #7447
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,736
Trader Rating: 85 (99%+)
Default

Looks great Jason, should be very helpfull for those going to the IIC, Some questions, you said in testing you were going to the blue or gold spring, was this on carpet or asphalt or both. And what tire combo did you test; I've been finding that changing form yellows to dpl pink in the rear on med/high bite carpet really helped but thats with the black center spring.
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 06-16-2009, 10:42 AM   #7448
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,824
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by chris moore View Post
Looks great Jason, should be very helpfull for those going to the IIC, Some questions, you said in testing you were going to the blue or gold spring, was this on carpet or asphalt or both. And what tire combo did you test; I've been finding that changing form yellows to dpl pink in the rear on med/high bite carpet really helped but thats with the black center spring.


Testing was done on both surfaces. I ran a blue spring on asphalt and on lower bite carpet and the gold in high traction. I am partial to the yellow rears for carpet but i guess it really depends on the track.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 06-16-2009, 10:42 AM   #7449
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,824
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by punkracer24 View Post
so what lipo do i need to buy that will fit in that chassis??



..sorry im a gas offroad guys
We based it off the SMC
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 06-16-2009, 11:16 AM   #7450
Tech Elite
 
chris moore's Avatar
 
Join Date: Mar 2004
Location: Phx AZ
Posts: 3,736
Trader Rating: 85 (99%+)
Default

Thanks for the info Jason, I was on high grip black ozite carpet and the rear just felt too locked in. I thought agout changing the shock oil/spring combo but was running aout of time before the main, Mabey I'll have more time to try some combos next time.
__________________
Sponsered by:

CMDezigns Paint Works
https://www.facebook.com/pages/CM-Dezigns/259989190822177?ref=hl
chris moore is offline   Reply With Quote
Old 06-16-2009, 11:38 AM   #7451
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,824
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by chris moore View Post
Thanks for the info Jason, I was on high grip black ozite carpet and the rear just felt too locked in. I thought agout changing the shock oil/spring combo but was running aout of time before the main, Mabey I'll have more time to try some combos next time.
The black center shock spring is gonna lock the rear end down. I would stiffen your center spring. The softer the center spring, the more rear grip your gonna get.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 06-16-2009, 07:19 PM   #7452
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

Looks great Jason! I was curious. With the LiPo pocket milled into the chassis, is there a noticeable increase in chassis flex or is it no different because the slots are shorter vs the standard 12RR chassis?
This chassis just might get me to try LiPo in 1/12 scale.
__________________
How would I describe my holeshots?

Three words...

Ready... Steady... Confetti!!!! (gonna need a new one of those)
SpraydbySprague is offline   Reply With Quote
Old 06-16-2009, 08:55 PM   #7453
Tech Lord
 
protc3's Avatar
 
Join Date: Jun 2003
Location: Spring Hill,Florida
Posts: 10,824
Trader Rating: 13 (100%+)
Default

The chassis is still very rigid. Between the shorter cell slots and the stiff bracing, there is no difference in rigidity from the standard 4 cell chassis.
__________________
Jason Breiner
BMI Racing
Team Associated
J Concepts
protc3 is offline   Reply With Quote
Old 06-17-2009, 03:59 AM   #7454
Tech Champion
 
Join Date: Nov 2001
Location: Hawaii, USA
Posts: 7,168
Default

Are the shorter chassis slots short enough to not need the battery locator for round cells? In comparison to the current chassis where is the battery positioned for round cells?
InspGadgt is offline   Reply With Quote
Old 06-17-2009, 06:31 AM   #7455
Tech Regular
 
Fuzzy's Avatar
 
Join Date: Jul 2003
Location: Mentor , Ohio
Posts: 397
Trader Rating: 4 (100%+)
Default

Guys, I'm going to be buying the DB12RR Lipo kit soon and I was wondering what a good starting point would be for the shock oil and damper lube weights. The car will be run on medium bite carpet.
Fuzzy 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 03:08 AM.


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