R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 08-02-2010, 10:56 AM   #1
Tech Master
 
Drusillus's Avatar
 
Join Date: Jul 2009
Location: Manitowoc, WI
Posts: 1,174
Trader Rating: 22 (100%+)
Send a message via AIM to Drusillus Send a message via MSN to Drusillus Send a message via Skype™ to Drusillus
Default OS .21 VZ-B V-Spec

Hello

I'm new to Nitro vehicles and picked up a used MBX5T with an OS .21 VZ-B V-Spec engine.

Engine looks likes its been well maintained but I am having trouble with it dying when throttle is applied. I think its set way too rich.

I've just downloaded the manual from OS's website and plan on setting everything to factory specs to retune.

Any suggestions/feedback about this engine? I may end up converting it to electric in the Fall but performance of the engine may keep me interested.

Thanks
Attached Thumbnails
OS .21 VZ-B V-Spec-2010-08-02-11.52.41.jpg   OS .21 VZ-B V-Spec-2010-08-02-11.51.51.jpg  
Drusillus is offline   Reply With Quote
Old 08-02-2010, 11:09 AM   #2
Tech Apprentice
 
Twitchy Kanai's Avatar
 
Join Date: Jun 2008
Location: Oklahoma City, Oklahoma
Posts: 79
Trader Rating: 9 (100%+)
Send a message via MSN to Twitchy Kanai
Default

Looking at your second picture, your mixture needle is in too much. Make it flush with the carb body and one turn in.
__________________
KO Helios C2 with Spektrum Pro
Kyosho MP9: TecnoPower, Werks 2013, JR 9100S, JR 9100S
Kyosho ST-RR: RB Concepts WS7II 3X, Werks 2013. JR 9100S, JR9100T
Twitchy Kanai is offline   Reply With Quote
Old 08-02-2010, 12:44 PM   #3
Tech Master
 
Drusillus's Avatar
 
Join Date: Jul 2009
Location: Manitowoc, WI
Posts: 1,174
Trader Rating: 22 (100%+)
Send a message via AIM to Drusillus Send a message via MSN to Drusillus Send a message via Skype™ to Drusillus
Default

Yea, I assumed it was not tuned like it should be

If I tried to sell this engine, assuming it is in good condition, what do you think I could get for it?
Drusillus is offline   Reply With Quote
Old 08-02-2010, 12:58 PM   #4
Tech Lord
 
Jaz240's Avatar
R/C Tech Elite Subscriber
 
Join Date: Aug 2008
Location: Dwindle city
Posts: 12,492
Trader Rating: 52 (100%+)
Default

you would only be able to sell it for parts unless you knew how much fuel was through it. Since you bought it used you have no way of knowing. You would get $40-$50 for it maybe
__________________
nothing to see here................................
Jaz240 is offline   Reply With Quote
Old 08-02-2010, 01:11 PM   #5
Tech Lord
 
Frank L's Avatar
 
Join Date: Dec 2008
Location: NorCal
Posts: 12,500
Trader Rating: 148 (100%+)
Default

Bring that middle needle out to flush it's the one opposite the carb slide and then somewhere between 11 and 2 and I bet that thing will fire right up. Don't expect it to last too long. Vspec engines are my fav and i have been pretty much running them exclusivly for the last year and a half but the don't last like a nova or rb. Unless it's completly shot you should be able to get it to run and have some fun with it. When it's cold turn the flywheel completly over and feel when it builds a little pressure does it feel linear or like it slips. If it has a spot where it does not feel linear then the crank pin is prob shot and it will always flame out no matter what you do.
__________________
- X-Ray/ RC America Team Driver - MKS -
- XB8 - XB8T - XB8 E - OS Spec III - B2102 - 4PXR -
~ SSC ~ Godfather ~ Ironman ~ ButterySmooth ~
Frank L is offline   Reply With Quote
Old 08-02-2010, 01:39 PM   #6
Tech Master
 
Drusillus's Avatar
 
Join Date: Jul 2009
Location: Manitowoc, WI
Posts: 1,174
Trader Rating: 22 (100%+)
Send a message via AIM to Drusillus Send a message via MSN to Drusillus Send a message via Skype™ to Drusillus
Default

I have not noticed any slipping, feels nice and seems to have a lot of compression. We'll see how it goes.
Drusillus is offline   Reply With Quote
Reply



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 07:33 AM.


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