need help please with this sound its making

[shaunaj97]

sounds like this and i dont know why ?

View attachment 20241011_100443.mp4.zip

 

[TeknoJ]

Is this the nitro? I had to download the attachment and that’s what I think I got out of it.
Richen up the low needle a tad.

 

[TeknoJ]

Be sure to let it fully warm up, like 212 degrees. My motor actually seems to run around the 230-240 range when tuned properly.
It just sounds like it could be just slightly lean on the idle, or the idle is too high.
Be sure to set an idle gap of about….. it’s eluding me right now. Hey I can’t remember everything
Watch these videos, these taught me to tune like a pro on my first and only nitro.

 

[CertifiedMike]

I also d/l'd and unzipped.
Glad you got it worked out and posted!
WELCOME TO RCTALK.COM!!!
The audio isn't the best. Its hard to tell what is rattling on the kit or if the rattle noise might be from the engine.
I do agree, although my video was also not good, what I saw looked like not very much white smoke coming from yoyr exhaust.
The white smoke indicates good oil flow/lubrication.
I would attempt to richen the motor only. Leaning it more would likely cause damage.
If the rattle noise is what you're after, try to richen and make it go away.
Just to be certain, verify your exhaust is tight also.
Look over your buggy as its running just to make certain this noise isn't coming from something vibrating.
If its none of those, tearing down the engine isn't usually a terrible job.
My next thought is a junk bearing or con rod
What kind of kit is this?

 

[TeknoJ]

yea what car is this and what is the engine? What carb?
Help us help you?

 

[Beer_Goggles_RC]

Sounds like it’s lean bogging. My guess is idle gap is too large and LSN is too lean

Hsn is probably lean too

What engine are you running?

Sounds like it’s lean bogging. My guess is idle gap is too large and LSN is too lean. I think it stops when you hit the throttle because the throttle is aiding in fuel delivery, though it’s still very lean.

Hsn is probably lean too sounding by how fast it revs up

What engine are you running?

Idk wtf just happened to that reply. I’ve got a pretty wicked buzz rn

 

[shaunaj97]

Sounds like it’s lean bogging. My guess is idle gap is too large and LSN is too lean

Hsn is probably lean too

What engine are you running?



Idk wtf just happened to that reply. I’ve got a pretty wicked buzz rn

the kit is a losi 8ight xt and engine is a picco mw v1 .21

 

[Beer_Goggles_RC]

the kit is a losi 8ight xt and engine is a picco mw v1 .21

How about fuel?

the kit is a losi 8ight xt and engine is a picco mw v1 .21

Is this a new or used engine? If new has the engine been broken in?

I can’t find a manual on it but try having the low speed and high speed needles flush with the housings. If there’s a mid speed needle try flush with the housing +6 hours on that. Set your idle gap to 0.8mm (about the diameter of a large paper clip)

This should get you back to pretty close to factory tune which should be considerable rich. From there we can retune or continue troubleshooting.

 

[CertifiedMike]

If you're just fighting tuning, restarting is always the place to go when you've "lost count" of the # of turns etc.
I sort of just set at stock and tune it from there by sound and feel. I don't "count turns" any more. It was causing me more confusion than it was worth.
Learning to tune by sound and feel AND BY TEMPERATURE will get you a good tune imo.
Out of curiousity, how old is this kit? Have you inspected the orings for your carb to be sure they aren't cracked or just junk?
You should be sure to have extras on hand as well as "green slime" assembly lube.
This will mess your mix ALL up!

 

[CertifiedMike]

Ok, while I was outside leafblowing I remembered ` few things...
Can you pull your glow plug and get a CLEAR COLOR pic posted for us?
What brand and # plug are you running?
Buy some spares, correct for this application and your ambient temp (where you run your car).

How are your fuel lines? If they are old and crusty or gunky, replace them.

How old/dirty is your fuel filter? Is it oiled correctly? Fuel filters are cheap! Replace it!

How oldis your nitro fuel?
What % is it?
If its old, just buy a new bottle so we can rule that out.

As far as plugs and fuel, I am WAY out of touch with "good" nitro gear.

Perhaps we could ask @Littlemotor for some good advice here???

Don't worry. We'll work this out!

 

[TeknoJ]

Don’t use Traxxas fuel, it has way too much oil and that leaves you with a very narrow tuning window.

 

[CertifiedMike]

Don’t use Traxxas fuel, it has way too much oil and that leaves you with a very narrow tuning window.

I didn't mean to leave you out of the loop brother! Sorry @TeknoJ !
I'm sure there are lots of ppl here who have a favorite brand and a good reason or 8 for picking them!

 

[Littlemotor]

That’s a high end, and slightly modified Italian race engine. Don’t go anywhere near that dude with RTR grade fuel.

I’ll come back and post up after I’m finished with my haircut..

And be prepared, open to, and willing to take the time to learn.. Has to be said. There is no magic bullet, or tune in a can when it comes to nitro engine tuning of any kind-let alone; a top tier Italian race engine.

 

[Littlemotor]

LSN is lean as a mofo.. That’s why it drops to what SOUNDS like a reasonable idle after throttle is blipped.

I’ll go more in depth if he comes back.. This isn’t a single paragraph fix if you don’t know how to tune an engine. Will require more than single sentence replies from him as well obviously.

 

[CertifiedMike]

That’s a high end, and slightly modified Italian race engine. Don’t go anywhere near that dude with RTR grade fuel.

I’ll come back and post up after I’m finished with my haircut..

And be prepared, open to, and willing to take the time to learn.. Has to be said. There is no magic bullet, or tune in a can when it comes to nitro engine tuning of any kind-let alone; a top tier Italian race engine.

I'm always ready to learn... but this isn't my motor!
I enjoy working on my R/C. Some ppl look at it as a chore.
I'm hopeful we get more answers here!

 

[Beer_Goggles_RC]

I enjoy working on my R/C. Some ppl look at it as a chore.

My third favorite thing about nitro is that its one more thing you get to mess with first and second are sounds and smell

 

[TeknoJ]

I didn't mean to leave you out of the loop brother! Sorry @TeknoJ !
I'm sure there are lots of ppl here who have a favorite brand and a good reason or 8 for picking them!

No worries man!