R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 05-14-2007, 09:40 AM   #7186
Tech Regular
 
Join Date: Oct 2004
Posts: 363
Default

Quote:
Originally Posted by olhipster1
Just a note from past Yok BD experience.
anyone looking to release or make a 3mm or thicker chassis...
milled out pockets are a must for the BD...
the car does not like to sit high on a straight 3mm lower deck, the roll centers just don't get right.

I've used two different 3mm chassis and the car just didn't feel right at all, but once I put the car back down to the intended Yok (hard chassis) chassis it got all the grip back.

a 3mm or 3.5mm top deck would be great but the belt path needs to have a pocket also, belt will rub and where down very quickly without it. I always wanted to see someone release a 3.5 top deck with the pockets milled on the underside to keep the center of gravity as low as possible and assist the flex with a key-in effect.

just a few thoughts....anyone listening
I am listening and im working away, the xray standoff idea is getting out of the question as the design of the top deck is not symmetrical so there is uneven flex in the chassis.
If you want a milled out chassis then you also need to consider that with this the price does jump up. Milling the top deck is not a great idea and wouldnt give a noticeable performance advantage over a normally cut plate.

I do have two questions for people though im looking at using 3.5mm for the chassis, and the other which may seem random what type of screws do people run in the main chassis???

olhipster could you emphasise on the belt rub with a pic pls.

I'll post some pics when im done with the chassis.
Dan Hughes is offline   Reply With Quote
Old 05-14-2007, 09:53 AM   #7187
Tech Regular
 
Join Date: Oct 2004
Posts: 363
Default

This is what i have so far, going to start with the milling slots now. Do people feel the need for different shock towers, like taller holes more holes like the masami tower?
Attached Thumbnails
Yokomo MR4TC-BD-bd-chassis.jpg   Yokomo MR4TC-BD-top-deck.jpg  
Dan Hughes is offline   Reply With Quote
Old 05-14-2007, 12:23 PM   #7188
Tech Master
 
tantalus007's Avatar
 
Join Date: May 2004
Location: parañaque
Posts: 1,452
Trader Rating: 17 (100%+)
Default

Quote:
Originally Posted by highwayman
i recently got the alum yoke spool, ran 4packs modified and raced 23T with it... so far so good... although i did notice that the steel universals had a bit of wobble... too bad i cant use my TC4 bones with the yoke spool.

anybody tried widening the rear track width of the BDM to match the front? 190mm? it seems that i gained a bit of stability and steering when i made the rear wider... just wanted to see if anybody else had the same results...
thanks for those info regarding the spool... i saw your kit last weekend and the spool seems ok... am also thinking of running a spool at the front... so im gathering a few more info on its pros and cons...
__________________
"para kang bata, nakahawak ka lang ng lapis kahit pader sinusulatan mo, magamit mo lang lapis mo..."
tantalus007 is offline   Reply With Quote
Old 05-14-2007, 03:40 PM   #7189
Tech Elite
 
olhipster1's Avatar
 
Join Date: Dec 2004
Location: Asgard
Posts: 3,994
Trader Rating: 98 (100%+)
Send a message via Yahoo to olhipster1
Default belt rub

hi Dan Hugh,

I'm actually in between cars at this time...
let go of my Yok BDM....but thinking of getting another one.

the top deck....
another over 2.75mm on the top deck will create very tight spacing between the belt and the top deck..in the area around the spur gears.
when the belt flexes (fore and back) the belt will hit/rub the carbon, roughly past the belt tensioner area.
if you mill out roughly a 2mm wide slot to follow the belt line (top deck only) that would eliminate the rubbing effect. I found the rubbing wears down the belt very quickly, especially the softer team bomber belt.

sorry, don't have pics. at this time....I'll if I can dig some up.

Mostly used 3x8 screws when running a 3mm deck or 3x10 in some areas. I thought 3x6 was just too small to capture a good seat on the threads.

PM sent your way.
olhipster1 is offline   Reply With Quote
Old 05-14-2007, 03:44 PM   #7190
Tech Elite
 
olhipster1's Avatar
 
Join Date: Dec 2004
Location: Asgard
Posts: 3,994
Trader Rating: 98 (100%+)
Send a message via Yahoo to olhipster1
Default steering plate

if you decide to make little add-on parts
the steering plate on the BD is a bit on weak side..and needs a lot more ackerman especially high traction runs.

just a suggestion of course.
olhipster1 is offline   Reply With Quote
Old 05-14-2007, 03:52 PM   #7191
Tech Regular
 
Join Date: Oct 2004
Posts: 363
Default

Quote:
Originally Posted by olhipster1
hi Dan Hugh,

I'm actually in between cars at this time...
let go of my Yok BDM....but thinking of getting another one.

the top deck....
another over 2.75mm on the top deck will create very tight spacing between the belt and the top deck..in the area around the spur gears.
when the belt flexes (fore and back) the belt will hit/rub the carbon, roughly past the belt tensioner area.
if you mill out roughly a 2mm wide slot to follow the belt line (top deck only) that would eliminate the rubbing effect. I found the rubbing wears down the belt very quickly, especially the softer team bomber belt.

sorry, don't have pics. at this time....I'll if I can dig some up.

Mostly used 3x8 screws when running a 3mm deck or 3x10 in some areas. I thought 3x6 was just too small to capture a good seat on the threads.

PM sent your way.
The top deck would seem to be a problem getting that changed. I see what you mean. I have jumped ship now anyway but when i ran the BD i got a move on and got some drawings done, but a lack of time meant i couldnt take them any further and they just sat on the PC.


Quote:
Originally Posted by olhipster1
if you decide to make little add-on parts
the steering plate on the BD is a bit on weak side..and needs a lot more ackerman especially high traction runs.

just a suggestion of course.
I made a set of steering plates with the same dimensions to the ones the Yok team ran at the worlds with the hpi suspension, they seemed to work very well. Any suggestions are great i'll see what i can do with them.
Dan Hughes is offline   Reply With Quote
Old 05-14-2007, 04:00 PM   #7192
Tech Master
 
fpart's Avatar
 
Join Date: Apr 2003
Location: NJ
Posts: 1,967
Trader Rating: 40 (100%+)
Send a message via Skype™ to fpart
Default

I do have two questions for people though im looking at using 3.5mm for the chassis, and the other which may seem random what type of screws do people run in the main chassis???

olhipster could you emphasise on the belt rub with a pic pls.

I'll post some pics when im done with the chassis.[/QUOTE]

Hey can you move the batt up forward a little?

Also in the reas you can possibly add the wing pieces on the rear graphite cross brace behing spur gear, It just needs to be thick.
__________________
teamTrinity.com Sweepracingusa.com
スクービーは私のヒーローです!
Why is Scooby so slow, you might ask?
fpart is offline   Reply With Quote
Old 05-14-2007, 04:02 PM   #7193
Tech Elite
 
olhipster1's Avatar
 
Join Date: Dec 2004
Location: Asgard
Posts: 3,994
Trader Rating: 98 (100%+)
Send a message via Yahoo to olhipster1
Default pic

top deck pic
**note - red arrows are suggestions...only.....black arrow = slot area line for belt
1. belt area...i had to file down a slot to keep the belt from rubbing into the top deck.

2. to reduce flex the right side over batteries shouldn't have the full cutout. the car will not flex evenly with this existing cutout as pictured...don't get me wrong this setup was plenty stiff...but I always want the car to flex evenly.

in the last pic you can see how close the belt was to the top deck, under load the belt would hit the deck


I did see a cut version of your ackerman plate and it was really trick..wish i had that piece when i was running my car....it looked like it gave uber steering effect.
Attached Thumbnails
Yokomo MR4TC-BD-yokomo-top-deck-2ver3.jpg   Yokomo MR4TC-BD-yokomo-top-deck-2ver2.jpg   Yokomo MR4TC-BD-yokomo-top-deck-1ver2.jpg  
olhipster1 is offline   Reply With Quote
Old 05-14-2007, 04:05 PM   #7194
Tech Master
 
fpart's Avatar
 
Join Date: Apr 2003
Location: NJ
Posts: 1,967
Trader Rating: 40 (100%+)
Send a message via Skype™ to fpart
Default

Man Orlando! Why did you get rid of that car?..I got rid of My cyclone for outdoOrs and am back with a new BD. The cyclone was just to much to handle outdoors!
__________________
teamTrinity.com Sweepracingusa.com
スクービーは私のヒーローです!
Why is Scooby so slow, you might ask?
fpart is offline   Reply With Quote
Old 05-14-2007, 04:05 PM   #7195
Tech Master
 
fpart's Avatar
 
Join Date: Apr 2003
Location: NJ
Posts: 1,967
Trader Rating: 40 (100%+)
Send a message via Skype™ to fpart
Default

Quote:
Originally Posted by Dan Hughes


I made a set of steering plates with the same dimensions to the ones the Yok team ran at the worlds with the hpi suspension, they seemed to work very well. Any suggestions are great i'll see what i can do with them.
If you have any more let me know!. Also, I was able to put the XRAY T2 steering knuckle on my BD and it corrects most of the steering ackerman issues since it has two holes and the rear one is back a bit.
__________________
teamTrinity.com Sweepracingusa.com
スクービーは私のヒーローです!
Why is Scooby so slow, you might ask?
fpart is offline   Reply With Quote
Old 05-14-2007, 04:10 PM   #7196
Tech Regular
 
Join Date: Oct 2004
Posts: 363
Default

Quote:
Originally Posted by fpart
If you have any more let me know!. Also, I was able to put the XRAY T2 steering knuckle on my BD and it corrects most of the steering ackerman issues since it has two holes and the rear one is back a bit.
Not got any left now but will get some more done if there is interest.
Dan Hughes is offline   Reply With Quote
Old 05-14-2007, 04:11 PM   #7197
Tech Master
 
fpart's Avatar
 
Join Date: Apr 2003
Location: NJ
Posts: 1,967
Trader Rating: 40 (100%+)
Send a message via Skype™ to fpart
Default

Im intersted in one!
__________________
teamTrinity.com Sweepracingusa.com
スクービーは私のヒーローです!
Why is Scooby so slow, you might ask?
fpart is offline   Reply With Quote
Old 05-14-2007, 04:14 PM   #7198
Tech Elite
 
olhipster1's Avatar
 
Join Date: Dec 2004
Location: Asgard
Posts: 3,994
Trader Rating: 98 (100%+)
Send a message via Yahoo to olhipster1
Default fpart

fpart...
i actually regret getting rid of my BD....it was pretty good...just couldn't get that extra out of it for carpet...it was more by driving than anything...but it was missing the right type of lower deck for carpet.

i might actually get another BDM...since i've been wheeling that car for so long.
olhipster1 is offline   Reply With Quote
Old 05-14-2007, 04:35 PM   #7199
Tech Elite
 
Join Date: Nov 2002
Location: Pasadena, CA
Posts: 2,520
Trader Rating: 5 (100%+)
Default

Hipster - I have three BDMs and I'm looking to sell one of my carpet cars. It has a custom 3mm upper and lower. It's in GREAT shape if you're interested.
DOTMAN is offline   Reply With Quote
Old 05-14-2007, 09:42 PM   #7200
Tech Master
 
Switch Blade's Avatar
 
Join Date: Jan 2003
Location: The British Invasion
Posts: 1,078
Send a message via AIM to Switch Blade
Default

has anyone ever used the "hard" yokomo chassis and team bomber top deck together? I remember when I used the carpet yok chassis with the standard top deck it was pretty stiff, not enough for very high grip, but when traction was low it seemed to work well. Is this a good route to go instead of buying one of these custom chassis?

and to use a front diff, do I just use all of the parts for the rear diff in the front or are they different? Also, what is the Part number for the locked center pully and the pins that attach it to the layshaft?

thanks
__________________
College
Switch Blade is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Yokomo MR4TC CGM wyl03 Australia For Sale/Trade 0 06-26-2007 04:39 PM
yokomo mr4tc pro racer57 R/C Items: For Sale/Trade 3 10-07-2006 02:34 AM
Looking for Yokomo MR4TC BD1 yyhayyim R/C Items: Wanted to Buy 1 08-24-2006 07:07 PM
yokomo mr4tc i730 R/C Items: For Sale/Trade 0 07-20-2005 02:51 PM
WTB: Yokomo MR4TC SD SSG! DOMOisCOOL R/C Items: Wanted to Buy 2 03-06-2004 08:31 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 11:15 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net