R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 07-29-2008, 04:39 PM   #1
Tech Master
 
yokemad's Avatar
 
Join Date: Apr 2007
Posts: 1,150
Default 68 Dp vs 48DP !!!

Hi Guys
I'm just wondering why Many top and good drivers Prefer 64Dp Spurs and pinions over 48dp?
If you share your experiances that would be great
Thanx in advance
yokemad is offline   Reply With Quote
Old 07-29-2008, 04:41 PM   #2
Tech Elite
 
a_main_attendee's Avatar
 
Join Date: Jan 2008
Location: Colorado, USA, The land of the free and the home of the brave!
Posts: 2,880
Trader Rating: 2 (100%+)
Default

im sure its to fine tune the gear ratios more to there liking, not to mention the slight (and i mean slight) efficiency gain using 64 pitch.
__________________
Support your local tracks!--|--e-teamhobbyplex.com--|--corrc.org--|

NNFaN Paints - Add some pride to YOUR ride.
a_main_attendee is offline   Reply With Quote
Old 07-29-2008, 08:36 PM   #3
Tech Fanatic
 
trailranger's Avatar
 
Join Date: Feb 2007
Location: Springfield, MO
Posts: 946
Default

IMO 64p for onroad carpet. Even with racing parking lots I use 64p. It keeps my pit gear smaller knowing I am only stocking a few spare sizes of spurs and pinions that can be used in either cars.

The same thought process could be applied to 48p too. If you are a club racer that has onroad and off-roa cars, having a collection of 48p spurs and pinions and running 48p in all your cars could save you money by not needing such a vast collection of parts. To cover the same gear range you would need 1/3 less pinions with 48P.

If you are that the point where you have your rollout determined to the nearest 0.05" then 64P would be your best bet.
trailranger is offline   Reply With Quote
Old 07-30-2008, 08:41 AM   #4
Tech Fanatic
 
tpczx6's Avatar
 
Join Date: Sep 2004
Location: Fremont CA
Posts: 845
Trader Rating: 3 (100%+)
Default

From Robinson Racing web site


Question: What is the advantage of 64 pitch over 48 pitch?

Answer: Finer gear ratio changes. Here are some examples with 64, 48 and 32 pitch:


64 pitch
28T by 108T = 3.857
27T by 108T = 4.000 a difference of .143

48 pitch
21T by 81T = 3.857
20T by 81T = 4.050 a difference of .193

32 pitch
14T by 54T = 3.857
13T by 54T = 4.153 a difference of .296



It's useful to note that in the three above sets of examples, that you could take the gears of the first example in each set, set the gear mesh, and then interchange them with the other two examples without readjusting the gear mesh.
__________________
RcAmerica--Xray---Hudy----KO PROPO USA---ORCA---GRAVITY RC
Motiv------Apexrc----- AVID
SWEEP Racing USA
Mike's Hobbyshop in Dallas (RIP)
Nor-Cal Hobbies [The Race Place]
tpczx6 is offline   Reply With Quote
Old 07-30-2008, 09:24 AM   #5
Tech Master
 
yokemad's Avatar
 
Join Date: Apr 2007
Posts: 1,150
Default

what about smoother throttle response and accelaration?
yokemad is offline   Reply With Quote
Old 07-30-2008, 02:17 PM   #6
Tech Elite
 
a_main_attendee's Avatar
 
Join Date: Jan 2008
Location: Colorado, USA, The land of the free and the home of the brave!
Posts: 2,880
Trader Rating: 2 (100%+)
Default

that could very well factor in, but it takes a mighty fine driver to consider it to the point where he thinks it will make him faster, plus, all the TCs i know of come allready with 64pitch gears, so unless you are blind and dont know how to set gear mesh, 64 pitch should be all you will ever need.
__________________
Support your local tracks!--|--e-teamhobbyplex.com--|--corrc.org--|

NNFaN Paints - Add some pride to YOUR ride.
a_main_attendee is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Trying to find a 48dp gear ratio list TRFTIM Electric On-Road 5 09-11-2006 02:33 PM
F/S: YOKOMO SD Parts - 48DP Pinion & Spur Gears f2000racer R/C Items: For Sale/Trade 2 05-24-2006 11:06 AM
masami with 48dp gears rc_square24 Electric On-Road 3 04-22-2004 08:27 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 04:54 AM.


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