R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-24-2009, 01:21 PM   #1
Tech Rookie
 
Join Date: Feb 2009
Posts: 15
Trader Rating: 1 (100%+)
Default what makes my car slow down?

it's a MRX 3X, at first i thought it was the drive belt that slow down the car but i already changed all 3 of them but it still very slow. what could be the problem? the engine is OS MAX RZ.
vuanhquoc is offline   Reply With Quote
Old 03-24-2009, 01:36 PM   #2
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,861
Trader Rating: 24 (100%+)
Default

What do you mean by "slow down"? If it starts out fast but then slows down it is probably the engine overheating or maybe a clutch or two speed issue. If it's always slow it could be anything from the motor getting old, clutch and two speed problems, bad fuel, bad tuning, and the list goes on and on.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is online now   Reply With Quote
Old 03-24-2009, 01:49 PM   #3
Tech Regular
 
Join Date: Feb 2006
Location: Netherlands
Posts: 478
Send a message via MSN to PMSorber
Default

Quote:
Originally Posted by vuanhquoc View Post
it's a MRX 3X, at first i thought it was the drive belt that slow down the car but i already changed all 3 of them but it still very slow. what could be the problem? the engine is OS MAX RZ.
Worn engine
Bad clutch
Bad bearings
New pully's
Bad belts (to tight new ones also)
Bad gearing

etc etc...
__________________
@ConSult Trading
Team Shepherd, PiraniRC, Sonic and Awesomatix BENELUX
www.team-shepherd.nl
PMSorber is offline   Reply With Quote
Old 03-24-2009, 02:16 PM   #4
Tech Elite
 
Join Date: Sep 2005
Location: Corona Ca.
Posts: 2,834
Trader Rating: 18 (100%+)
Default What makes my car slow down

Do you have any drag brake on it?
__________________
[COLOR="Red"][FONT="Comic Sans MS"][/FONT][/COLOR]BRC358http://www.kamikazercracing.com
nearest barstool
brc358 is offline   Reply With Quote
Old 03-24-2009, 02:43 PM   #5
Tech Master
 
JetMD's Avatar
 
Join Date: Jan 2006
Location: Richmond VA
Posts: 1,172
Trader Rating: 1 (100%+)
Default

Check to make sure the brakes are installed correctly. I bought a used MRX4 off a friend and he had installed the pads backwards which caused them to get stuck on all the time. After I swapped them to the other sides, they worked perfectly.
__________________
www.vorra.org

MINO Racing
JetMD is offline   Reply With Quote
Old 03-24-2009, 04:45 PM   #6
Tech Master
 
rcrevolution's Avatar
 
Join Date: Jul 2005
Location: Somewhere Delicious
Posts: 1,281
Trader Rating: 1 (100%+)
Send a message via AIM to rcrevolution
Default

friction....


try running the car on ice or a puddle of oil, it shouldnt slow down anymore
rcrevolution is offline   Reply With Quote
Old 03-24-2009, 05:57 PM   #7
Tech Elite
 
pakk's Avatar
 
Join Date: Mar 2009
Posts: 3,077
Trader Rating: 79 (100%+)
Default

maybe the carb isnt opening all the way.
__________________
*Photon* *SC10 4x4*
RCRD
pakk is offline   Reply With Quote
Old 03-24-2009, 06:04 PM   #8
Tech Regular
 
wizby's Avatar
 
Join Date: Sep 2004
Location: indiana
Posts: 487
Default

Is the engine screaming but the car is slow? Clutch nut too tight?
__________________
XRAY NT1 2014 NOVA KEEPON DX3R
MIKE PARKER PRESIDENT
NORTHERN INDIANA TEAM RACING ORG. MIDWEST SERIES TEAM DIRECTOR
wizby is offline   Reply With Quote
Old 05-03-2009, 08:46 AM   #9
Tech Initiate
 
Prince Steve's Avatar
 
Join Date: Oct 2007
Posts: 25
Thumbs up

Quote:
Originally Posted by rcrevolution View Post
friction....


try running the car on ice or a puddle of oil, it shouldnt slow down anymore

LMAO....LMAO....LMAO....
Prince Steve is offline   Reply With Quote
Old 05-03-2009, 04:17 PM   #10
Tech Master
 
ziggy12345's Avatar
 
Join Date: Jun 2003
Location: West Midlands, UK
Posts: 1,596
Default

....applying the brakes....
__________________
Dedicated RC Car Speed Site

http://www.fast-rc.co.uk/forum/index.php

Sponsored by:
Norfolk and Chance
ziggy12345 is offline   Reply With Quote
Old 05-03-2009, 06:37 PM   #11
Tech Master
 
JetMD's Avatar
 
Join Date: Jan 2006
Location: Richmond VA
Posts: 1,172
Trader Rating: 1 (100%+)
Default

.....hitting boards
.....slower people in front of you
.....your engine's too rich/lean...
__________________
www.vorra.org

MINO Racing
JetMD is offline   Reply With Quote
Old 05-04-2009, 07:09 AM   #12
kmh
Tech Addict
 
Join Date: Jun 2006
Posts: 529
Default friction

Sit the car on a flat surface(without the engine running), like a desk or even your kitchen table,and roll(push) the car back and forth by hand to see if you can feel or hear something like a bind. Then start to eliminate things. I would start by taking the motor out of the car, and repeating the "roll" test. From there side belt,etc. Keep looking you will find something.
kmh is offline   Reply With Quote
Old 05-04-2009, 08:27 AM   #13
Tech Elite
 
fastharry™'s Avatar
 
Join Date: Sep 2001
Location: Mahwah, NJ.. USA!! ..... Home of http://www.fastharry.com
Posts: 2,846
Trader Rating: 4 (100%+)
Send a message via Skype™ to fastharry™
Default

  • lack of set-up
  • lack of tuning
  • lack of practice
  • lack of knowledge
Thats right, I said it...
__________________
www.fastharry.com---search "fastharry" on facebook
See Fastharry in Super Nitro racing at the HPI CHALLENGE...
http://www.youtube.com/watch?v=jzo-cBEnE0c
fastharry™ is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
1/12 forum ovalnator Electric On-Road 46191 Today 07:43 AM
Hot Bodies Cyclone Frank McKinney Electric On-Road 19762 07-26-2017 11:42 PM
UK Race Talk TryHard Racing Forum 9876 12-05-2010 11:46 AM
Why should we be made to slow down?! Racingbod85 Electric On-Road 193 05-16-2006 01:41 PM
What is the best way to break in a new ening? adsl Onroad Nitro Engine Zone 27 02-10-2005 08:49 AM
new engine woes (novarossi rs12) packetdreamer Nitro On-Road 39 08-07-2004 10:14 AM
whats ur driving style and what is faster? Matt04 Racing Forum 10 10-14-2003 05:00 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 01:47 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