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

Vspec Tuning Problem

Vspec Tuning Problem

Reply

Old 04-26-2009, 11:34 AM
  #1  
Tech Regular
Thread Starter
 
Krawl's Avatar
 
Join Date: Aug 2008
Location: Nitropia
Posts: 387
Default Vspec Tuning Problem

I recently purchased a brand new vspec..run perfectly after break-in process...changed the glow plug on second gallon and still fine, on third tank, it started to act weird, it stalled after high speed runs and hard to idle unless keep the throttle slightly pressed, I lean the HSN it went ok but the temp reached 221F, then I richen it just a little and it bogs, couldn't make high speed pass till it stalled, how come only small increments of needle turn could act like a 1/4 turn?

Please Help
Krawl is offline  
Reply With Quote
Old 04-26-2009, 12:14 PM
  #2  
Tech Lord
iTrader: (52)
 
Jaz240's Avatar
 
Join Date: Aug 2008
Location: Dwindle city
Posts: 12,494
Trader Rating: 52 (100%+)
Default

Sounds like an air leak...Vspecs have been known to have them. Start the engine and spray windex on it as its running..look for bubbles at the front bearing, the rear backplate, the carb base, the HSN and the carb boot
Jaz240 is offline  
Reply With Quote
Old 04-26-2009, 12:27 PM
  #3  
Tech Regular
Thread Starter
 
Krawl's Avatar
 
Join Date: Aug 2008
Location: Nitropia
Posts: 387
Default

Originally Posted by Jaz240 View Post
Sounds like an air leak...Vspecs have been known to have them. Start the engine and spray windex on it as its running..look for bubbles at the front bearing, the rear backplate, the carb base, the HSN and the carb boot
Oh no, I hate air leaks! It's hard to find!...how about fuel tank or fuel line? btw what is windex?
Krawl is offline  
Reply With Quote
Old 04-26-2009, 12:37 PM
  #4  
Tech Fanatic
iTrader: (4)
 
Join Date: Jan 2009
Location: Connecticut
Posts: 775
Trader Rating: 4 (100%+)
Default

http://images.google.com/imgres?imgu...G46-twefy4ztDw
howtowakeakar is offline  
Reply With Quote
Old 04-26-2009, 12:40 PM
  #5  
Tech Regular
Thread Starter
 
Krawl's Avatar
 
Join Date: Aug 2008
Location: Nitropia
Posts: 387
Default

Originally Posted by howtowakeakar View Post
Oww thanks...
Krawl is offline  
Reply With Quote
Old 04-26-2009, 12:50 PM
  #6  
Tech Lord
iTrader: (52)
 
Jaz240's Avatar
 
Join Date: Aug 2008
Location: Dwindle city
Posts: 12,494
Trader Rating: 52 (100%+)
Default

Originally Posted by Krawl View Post
Oh no, I hate air leaks! It's hard to find!...how about fuel tank or fuel line? btw what is windex?
You can check the tank and lines also, wont hurt to check all possibilities
Jaz240 is offline  
Reply With Quote
Old 04-26-2009, 01:35 PM
  #7  
Tech Regular
Thread Starter
 
Krawl's Avatar
 
Join Date: Aug 2008
Location: Nitropia
Posts: 387
Default

Originally Posted by Jaz240 View Post
You can check the tank and lines also, wont hurt to check all possibilities
Ok thanks...I guess I have no luck in Nitro RC, bought a used werks B7 few months ago ended with broken crankshafts, and that engine was really hard to tune , this time I tried for a second chance with a new engine, still got problem ...is there any trouble free engines than broke after reasonable amount of time?
Krawl is offline  
Reply With Quote
Old 04-26-2009, 01:38 PM
  #8  
Tech Champion
iTrader: (25)
 
losi_racer's Avatar
 
Join Date: Nov 2008
Location: mesa,az
Posts: 6,470
Trader Rating: 25 (100%+)
Default

you gotta have patience in nitro, but most high dollar engines should give you to much problem if your ambient temps are fairly consistent. Try a Novarossi +4..... youll be happy u did
losi_racer is offline  
Reply With Quote
Old 04-26-2009, 01:38 PM
  #9  
Tech Regular
iTrader: (1)
 
HulkNT1's Avatar
 
Join Date: Sep 2007
Posts: 390
Trader Rating: 1 (100%+)
Default

Originally Posted by Krawl View Post
Ok thanks...I guess I have no luck in Nitro RC, bought a used werks B7 few months ago ended with broken crankshafts, and that engine was really hard to tune , this time I tried for a second chance with a new engine, still got problem ...is there any trouble free engines than broke after reasonable amount of time?
All Engine will give you trouble you need to have patience to work on RC.
HulkNT1 is offline  
Reply With Quote
Old 04-26-2009, 01:51 PM
  #10  
Tech Regular
Thread Starter
 
Krawl's Avatar
 
Join Date: Aug 2008
Location: Nitropia
Posts: 387
Default

Originally Posted by losi_racer View Post
you gotta have patience in nitro, but most high dollar engines should give you to much problem if your ambient temps are fairly consistent. Try a Novarossi +4..... youll be happy u did
Yeah I know..but sometimes this is beyond my patience limit...It's really hard to spend my workdays thinking about my engine problem hahaha..any links to Nova Plus 4? Their official website seems a bit confusing in categorizing the products...thanks
Krawl is offline  
Reply With Quote
Old 04-26-2009, 01:54 PM
  #11  
Tech Regular
Thread Starter
 
Krawl's Avatar
 
Join Date: Aug 2008
Location: Nitropia
Posts: 387
Default

Originally Posted by HulkNT1 View Post
All Engine will give you trouble you need to have patience to work on RC.
Yeah...I also into electric off-road, they're so much fun, but not as fun as Nitro..so it's a dilemma
Krawl is offline  
Reply With Quote
Old 04-26-2009, 02:17 PM
  #12  
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

http://www.carolinasrc.com/Webstore/...dproduct=11963

Been meanibg to try one but I'm like that famous actor from china "Low Cash" right now.Word on the street is good on this motor.I normaly wouldnt rec a new motor for a little issue like you have with your v-spec but I had issues with mine & felt let down by its lifespan,seems hit of miss with that motor but when it worked it worked real good.
butch man is offline  
Reply With Quote
Old 04-26-2009, 03:16 PM
  #13  
Tech Lord
iTrader: (52)
 
Jaz240's Avatar
 
Join Date: Aug 2008
Location: Dwindle city
Posts: 12,494
Trader Rating: 52 (100%+)
Default

Originally Posted by butch man View Post
http://www.carolinasrc.com/Webstore/...dproduct=11963

Been meanibg to try one but I'm like that famous actor from china "Low Cash" right now.Word on the street is good on this motor.I normaly wouldnt rec a new motor for a little issue like you have with your v-spec but I had issues with mine & felt let down by its lifespan,seems hit of miss with that motor but when it worked it worked real good.
I'm with you butch. I bought my first and last V-spec last December. It's the best 3 gallon engine money can buy. The quality and craftsmanship is just way to subpar for me. There are too many awesome engines out there and some of them are half the price of V-spec. I'll never buy O.S. again
Jaz240 is offline  
Reply With Quote
Old 04-26-2009, 03:37 PM
  #14  
Tech Master
 
jrwoodchuck's Avatar
 
Join Date: Nov 2007
Location: Northampton, Massachusettes
Posts: 1,336
Default

Originally Posted by Jaz240 View Post
I'm with you butch. I bought my first and last V-spec last December. It's the best 3 gallon engine money can buy. The quality and craftsmanship is just way to subpar for me. There are too many awesome engines out there and some of them are half the price of V-spec. I'll never buy O.S. again
you'll have to forgive jazzy, if it's not an xray or if it's an OS, it sucks. he's a little close minded, and he still thinks the earth is flat.
jrwoodchuck is offline  
Reply With Quote
Old 04-26-2009, 03:42 PM
  #15  
Tech Fanatic
iTrader: (4)
 
Join Date: Jan 2009
Location: Connecticut
Posts: 775
Trader Rating: 4 (100%+)
Default

I have not personally run an O.S., but I get two opinions on their motors:

1) Awesome, last forever, gobs of power.

2) Crap, don't last 2 gallons, not worth their price.
howtowakeakar is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Terms of Service