R/C Tech Forums

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

Like Tree31Likes
Reply
 
Thread Tools Search this Thread
Old 08-05-2014, 10:16 AM   #4051
Tech Master
 
Join Date: Jan 2013
Location: Dublin, Ohio
Posts: 1,095
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by Matt :-) View Post
Think of it like this.

Heavier center diff oil would be similar to tightening a slipper clutch. Putting more equal power front and rear.

Thinner center diff oil would be similar to loosening a slipper clutch. Putting more power to the front while on throttle.

The following does hold basic fact / truth, but ultimately comes down to the condition of the track surface and personal driving style.

Heavier rear diff oil may help give you more straight forward bite (as long as the center diff is supplying enough drive to the rear) , but the rear might want to lose traction while on throttle through a turn.

Lighter rear diff oil will provide better on throttle control in turns, and personally I've never really been in a situation where it hurt my speed on the straights.

Hope this is helpful.

I have a problem with what you said in red above.

1: Thinner center diff fluid will put power where there is the least amount of traction. (typically this is the front tires. but not always)

2: Running a slipper loose (with no center diff) certainly does not put more power to the front wheels. It just slips.
__________________
Website: http://michaelsasher.com
masher81 is offline   Reply With Quote
Old 08-05-2014, 10:17 AM   #4052
Tech Elite
 
RC*PHREAK's Avatar
 
Join Date: Dec 2010
Posts: 4,493
Trader Rating: 119 (100%+)
Default

Quote:
Originally Posted by RockStew View Post
Oh man dude you just stoked the crap out of me with this info I am getting the picture!!!!! one piece left what happens in the front by increasing, decreasing the weight oil?
https://docs.google.com/file/d/0B6fO...dKb3FhU2M/edit

scroll down to 4.3

credit for converting to .pdf goes to: adrictan
RC*PHREAK is offline   Reply With Quote
Old 08-05-2014, 10:19 AM   #4053
Tech Elite
 
RC*PHREAK's Avatar
 
Join Date: Dec 2010
Posts: 4,493
Trader Rating: 119 (100%+)
Default

Quote:
Originally Posted by masher81 View Post
I have a problem with what you said in red above.

1: Thinner center diff fluid will put power where there is the least amount of traction. (typically this is the front tires. but not always)

2: Running a slipper loose (with no center diff) certainly does not put more power to the front wheels. It just slips.
yes, you're losing power to both front and rear equally when a slipper slips (unless of course you're talking about a 2 way slipper like on the dingo).
RC*PHREAK is offline   Reply With Quote
Old 08-05-2014, 10:29 AM   #4054
Tech Apprentice
 
RockStew's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jun 2014
Location: Temecula, Ca
Posts: 55
Default

Quote:
Originally Posted by RC*PHREAK View Post
https://docs.google.com/file/d/0B6fO...dKb3FhU2M/edit

scroll down to 4.3

credit for converting to .pdf goes to: adrictan
This is amazingly helpful!! thanks so much
__________________
B5M,TEKNO SCT 410,T5M,HB D413,TEKIN,DE WHEELS,TRINITY,PROLINE,JCONCEPTS,SDRC,IERC, EclipseRC.com, AIRTRONICS,
RockStew is offline   Reply With Quote
Old 08-05-2014, 02:16 PM   #4055
Tech Regular
 
Stevomatik's Avatar
 
Join Date: May 2013
Location: Shhhlong Beach, ca
Posts: 315
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by Tigergutt View Post
What's the advantaged of 2 holes compared to 4 holes?
2 hole pistons have more pack than 4 hole pistons... When I had the 4 holes installed I was chassis slapping off almost every jump... Two hole made the car way more plush on landing... From there you can tune oils
__________________
Check out the bodies I've painted

Instagram.com/CBS_RC
Stevomatik is offline   Reply With Quote
Old 08-05-2014, 02:34 PM   #4056
Tech Fanatic
 
Matt :-)'s Avatar
 
Join Date: Jul 2013
Location: Dover, Tn
Posts: 775
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by masher81 View Post
I have a problem with what you said in red above.

1: Thinner center diff fluid will put power where there is the least amount of traction. (typically this is the front tires. but not always)

2: Running a slipper loose (with no center diff) certainly does not put more power to the front wheels. It just slips.
I was trying to explain it as simple and easy as I could. I try not to be overwhelming on a subject that seems to be new to someone. Get them on page first, then start honing the fine edge.

You bring good info though

Thanks for the additional knowledge.
Matt :-) is offline   Reply With Quote
Old 08-05-2014, 02:41 PM   #4057
Tech Regular
 
Join Date: Mar 2005
Location: Hokksund, Norway
Posts: 280
Default

Quote:
Originally Posted by Stevomatik View Post
2 hole pistons have more pack than 4 hole pistons... When I had the 4 holes installed I was chassis slapping off almost every jump... Two hole made the car way more plush on landing... From there you can tune oils
Thanks.
From stock shock setup to 2 hole, what oil should I use?
Tigergutt is offline   Reply With Quote
Old 08-05-2014, 02:47 PM   #4058
Tech Elite
R/C Tech Elite Subscriber
 
Join Date: Aug 2010
Location: Anaheim Ca.
Posts: 3,888
Trader Rating: 137 (100%+)
Default

Haven't had the time to drill out my 2 hole pistons yet, and don't see that happening anytime soon. Should I just go up a full weight on each corner. It feels way too soft on the track. Running Losi 35/30 f/r
jpcopeland1 is offline   Reply With Quote
Old 08-05-2014, 03:37 PM   #4059
Tech Fanatic
 
Matt :-)'s Avatar
 
Join Date: Jul 2013
Location: Dover, Tn
Posts: 775
Trader Rating: 3 (100%+)
Default

I've been using the 4 x 1.2 hole pistons with losi 45 front & 35 rear.

So far so good for me.
Matt :-) is offline   Reply With Quote
Old 08-05-2014, 04:13 PM   #4060
Tech Regular
 
Stevomatik's Avatar
 
Join Date: May 2013
Location: Shhhlong Beach, ca
Posts: 315
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by Tigergutt View Post
Thanks.
From stock shock setup to 2 hole, what oil should I use?
Eh, you could start from Ty's OcRc oil set up 37.5 up front then 32.5 in the rear and see how that feels. 1.6 pistons up front and 1.7 in the rear... But then again idk what kind of track your going to be running and springs you plan to run... You just have to try something then go from there
__________________
Check out the bodies I've painted

Instagram.com/CBS_RC
Stevomatik is offline   Reply With Quote
Old 08-05-2014, 05:02 PM   #4061
Tech Addict
 
Join Date: Aug 2013
Location: NY
Posts: 533
Trader Rating: 15 (100%+)
Default

Do TLR/AE rear wheels work on this buggy?
Tommygun1 is offline   Reply With Quote
Old 08-05-2014, 05:31 PM   #4062
Tech Fanatic
 
Matt :-)'s Avatar
 
Join Date: Jul 2013
Location: Dover, Tn
Posts: 775
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by Tommygun1 View Post
Do TLR/AE rear wheels work on this buggy?
front & rear wheels for TLR 22-4 fit perfect.
Matt :-) is offline   Reply With Quote
Old 08-05-2014, 06:26 PM   #4063
Tech Master
 
JasonR/C's Avatar
 
Join Date: Jan 2013
Location: Joliet,Il
Posts: 1,858
Trader Rating: 9 (100%+)
Default

Quote:
Originally Posted by RC*PHREAK View Post
https://docs.google.com/file/d/0B6fO...dKb3FhU2M/edit

scroll down to 4.3

credit for converting to .pdf goes to: adrictan
Amazing.
__________________
Leisure Hours Hobbies and Raceway, Joliet, Illinois
JasonR/C is offline   Reply With Quote
Old 08-06-2014, 05:07 AM   #4064
Tech Fanatic
 
Matt :-)'s Avatar
 
Join Date: Jul 2013
Location: Dover, Tn
Posts: 775
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by RC*PHREAK View Post
https://docs.google.com/file/d/0B6fO...dKb3FhU2M/edit

scroll down to 4.3

credit for converting to .pdf goes to: adrictan
The info for the front diff oil on this link seems to work the opposite way for me.

In my experiences :

If my front diff oil is too thin, on throttle steering is too tight (oversteer). The car wants spin out when on throttle in a sweeper.

If it's to thick, I experience understeer, and the car wants to push to the outside of the turn when on throttle.

Maybe my driving style is different from the person who wrote the info in that link. He mentioned a few things that gave me the impression he was driving a nitro fueled car. Would that make any difference ? I've never ran nitro.

I do prefer to "throttle steer" through sweepers. I'm much lighter on the throttle in tighter, more technical turns.

For example, I started with 7/100/3 in my D413

Way too much on throttle steering (oversteer) in the sweepers. Hard for me to control.

Went to 15/100/3. Getting easier to control on throttle in the sweepers. Still just a little too much oversteer when on throttle in the sweepers.

Next time I go to the track, I may try going up in the front diff a little more 20/100/3 or possibly go down in the center 15/80/3. Still tuning.

I experienced the same pattern tuning my 8IGHT-E 2.0

First set up 10/10/3 had terrible understeer. Pushed to the outside of turns when on throttle.

Went to 7/10/5 very controlled and stable throttling through sweepers.

There's a Tekno sponsored driver at my local track. He's one of the fastest guys I've ever met. He's been teaching me how he tunes his diffs for throttle steering. It's really helped my lap times, and consistency.

Not trying to cause a stink over the subject. It just always surprises me to see how differently a tuning adjustment will react to different people.
Matt :-) is offline   Reply With Quote
Old 08-06-2014, 09:34 AM   #4065
Tech Addict
 
Join Date: Oct 2009
Location: Cincinnati, OH
Posts: 719
Trader Rating: 5 (100%+)
Default

How many people are running fans over the motor? I want to run my D413 this weekend but probably won't get a chance to get a fan until next week and I noticed most guys are running motor fans (I've always run them on ESCs in wheeler, but never on the motor). Any ideas on gearing for a 6.5? It looks like it goes anywhere from 21-24. I was thinking of going with a 22 and going up to 23 if temps looked decent.
AMorgan is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 3 (1 members and 2 guests)
2004hdfxsti
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 09:43 PM.


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