R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 04-02-2009, 01:32 PM   #1
Tech Apprentice
 
2916jr's Avatar
 
Join Date: Apr 2009
Location: Cleveland, TN
Posts: 94
Exclamation help with motor

well I just started racing again and I got a cen pro buggy and got a 4 stroke
O.S. 30 and need help with the gearing right now it is a 15t clutch bell and the car doesnt start moving till about half throttle could this be clutch setup or gearing?
2916jr is offline   Reply With Quote
Old 04-02-2009, 02:54 PM   #2
Tech Addict
 
beginner4life's Avatar
 
Join Date: Jun 2008
Posts: 513
Trader Rating: 9 (91%+)
Default

Sounds like ur clutch is way stiff.
Quote:
Originally Posted by 2916jr View Post
well I just started racing again and I got a cen pro buggy and got a 4 stroke
O.S. 30 and need help with the gearing right now it is a 15t clutch bell and the car doesnt start moving till about half throttle could this be clutch setup or gearing?
__________________
*Team Terribles*

RC8T-RB S3-Hitec Servos- Spektrum
beginner4life is offline   Reply With Quote
Old 04-02-2009, 03:02 PM   #3
Tech Master
 
OfnaJoe's Avatar
 
Join Date: Dec 2008
Location: Bristol Va
Posts: 1,570
Trader Rating: 58 (100%+)
Default

Unless I am wrong the OS 30 4 stroke is a airplane engine, and I don't think it will work at all in a buggy even if you could get it mounted up and a clutch and flywheel on it, it wouldn't have enough torque to pull out!
OfnaJoe is offline   Reply With Quote
Old 04-02-2009, 03:03 PM   #4
Tech Initiate
 
NITR04LIFE09's Avatar
 
Join Date: Apr 2009
Location: OAK HARBOR WA
Posts: 44
Trader Rating: 3 (100%+)
Default

isnt that a plane engine? they dont have the right power to run a car
NITR04LIFE09 is offline   Reply With Quote
Old 04-02-2009, 03:07 PM   #5
Tech Addict
 
beginner4life's Avatar
 
Join Date: Jun 2008
Posts: 513
Trader Rating: 9 (91%+)
Default

haha i think he meant 2 stroke http://www.osengines.com/engines/osmg2075.html
__________________
*Team Terribles*

RC8T-RB S3-Hitec Servos- Spektrum
beginner4life is offline   Reply With Quote
Old 04-02-2009, 03:33 PM   #6
Tech Master
 
OfnaJoe's Avatar
 
Join Date: Dec 2008
Location: Bristol Va
Posts: 1,570
Trader Rating: 58 (100%+)
Default

Quote:
Originally Posted by NITR04LIFE09 View Post
isnt that a plane engine? they dont have the right power to run a car
Ain't that what I just said??

lol............

Wait for him to verify if it's a 2 or 4 stroke.......
OfnaJoe is offline   Reply With Quote
Old 04-02-2009, 03:40 PM   #7
Tech Initiate
 
NITR04LIFE09's Avatar
 
Join Date: Apr 2009
Location: OAK HARBOR WA
Posts: 44
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by OfnaJoe View Post
Ain't that what I just said??

lol............

Wait for him to verify if it's a 2 or 4 stroke.......
Repled at the same time, lol

i would say deff. clutch problem gearing wont have much to do with the car not doing anything till half throttle.
NITR04LIFE09 is offline   Reply With Quote
Old 04-02-2009, 04:27 PM   #8
Tech Master
 
OfnaJoe's Avatar
 
Join Date: Dec 2008
Location: Bristol Va
Posts: 1,570
Trader Rating: 58 (100%+)
Default

Even if he's running 1.1 springs and ultra lightweight aluminum shoes it should move at low throttle, unless something is stuck!
OfnaJoe is offline   Reply With Quote
Old 04-03-2009, 02:22 PM   #9
Tech Apprentice
 
2916jr's Avatar
 
Join Date: Apr 2009
Location: Cleveland, TN
Posts: 94
Default

Quote:
Originally Posted by OfnaJoe View Post
Even if he's running 1.1 springs and ultra lightweight aluminum shoes it should move at low throttle, unless something is stuck!
it is a 4 stroke and nothing is binding up but I am preety sure it is a clutch spring problem, the springs are 1.1's I believe, and I noticed there is a large amount of air gap between the shoes and the bell what is the gap supposed to be set at?
2916jr is offline   Reply With Quote
Old 04-03-2009, 05:14 PM   #10
Tech Master
 
OfnaJoe's Avatar
 
Join Date: Dec 2008
Location: Bristol Va
Posts: 1,570
Trader Rating: 58 (100%+)
Default

Does it look like this? this is a OS 30 4 stroke!
http://www3.towerhobbies.com/cgi-bin...I=LXCNA5&P=FR#
OfnaJoe is offline   Reply With Quote
Old 04-03-2009, 05:36 PM   #11
Tech Adept
 
junier00's Avatar
 
Join Date: Mar 2009
Posts: 197
Trader Rating: 20 (100%+)
Default

Not a lot of RPM to work with if it's the motor above...
junier00 is offline   Reply With Quote
Old 04-03-2009, 06:05 PM   #12
Tech Regular
 
Join Date: Jan 2009
Location: Northern MN
Posts: 295
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by 2916jr View Post
it is a 4 stroke and nothing is binding up but I am preety sure it is a clutch spring problem, the springs are 1.1's I believe, and I noticed there is a large amount of air gap between the shoes and the bell what is the gap supposed to be set at?
You want to get the lightest clutch springs you can find, and the heaviest shoes to drop the engagement RPM. Also go to the largest clutch bell you can find. Even at that your not gonna have much top end.

You really may need to do some custom clutch design to get the engagement to a reasonable rpm for that engine. Gearing is also a problem. If you had it in a truggy I would say to put buggy gears in both differentials. Not many options in a buggy though. Good luck.
John Schafer is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Losi 8ight building and setup JBRacing Nitro Off-Road 8691 06-27-2011 08:43 AM
Roadrunner Xpress bun Electric On-Road 9 07-22-2010 11:15 AM
Got a few questions about motor mounts and backplates. Mugen MBX-5 Nitro Off-Road 35 01-20-2008 06:31 PM
help with Motor???? jhigga15 Electric On-Road 7 10-07-2003 09:45 AM



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 01:57 PM.


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