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-   -   Vspec Tuning Problem (https://www.rctech.net/forum/nitro-off-road/292740-vspec-tuning-problem.html)

Krawl 04-26-2009 11:34 AM

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

Jaz240 04-26-2009 12:14 PM

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

Krawl 04-26-2009 12:27 PM


Originally Posted by Jaz240 (Post 5734238)
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?

howtowakeakar 04-26-2009 12:37 PM

http://images.google.com/imgres?imgu...G46-twefy4ztDw

Krawl 04-26-2009 12:40 PM


Originally Posted by howtowakeakar (Post 5734286)

Oww thanks...

Jaz240 04-26-2009 12:50 PM


Originally Posted by Krawl (Post 5734269)
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

Krawl 04-26-2009 01:35 PM


Originally Posted by Jaz240 (Post 5734316)
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 :flaming:, this time I tried for a second chance with a new engine, still got problem :cry:...is there any trouble free engines than broke after reasonable amount of time?

losi_racer 04-26-2009 01:38 PM

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

HulkNT1 04-26-2009 01:38 PM


Originally Posted by Krawl (Post 5734403)
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 :flaming:, this time I tried for a second chance with a new engine, still got problem :cry:...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.

Krawl 04-26-2009 01:51 PM


Originally Posted by losi_racer (Post 5734408)
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 04-26-2009 01:54 PM


Originally Posted by HulkNT1 (Post 5734409)
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 :deathstar

butch man 04-26-2009 02:17 PM

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.

Jaz240 04-26-2009 03:16 PM


Originally Posted by butch man (Post 5734487)
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

jrwoodchuck 04-26-2009 03:37 PM


Originally Posted by Jaz240 (Post 5734643)
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.:D

howtowakeakar 04-26-2009 03:42 PM

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.


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