Vertex Engines Too Rich and Lean LSN Signs 

Glad it helped!

Can u tell me what it means when my nitro truck revs up to full throttle but the throttle on carb is all the way closed but Reeves high?????

@@billybanet9955 Low speed needle may need adjusting

you're welcome : )

its because the air is less dense (less oxygen) and then to conpensate you richen it i think

@@Andre_Thomasson In colder weather as strange as this may sound, a nitro engine of this category, runs LEANER on its own due to less oxygen in the air, the air is shallow/less dense then say in the summer. Due to this happening, we have to give the engine more oxygen to run normally again, how do we do this if mother nature can't give us more oxygen? in the fuel mixture for nitro rc engines specifically, there is an additive called nitromethane, this is a fluid rich of oxygen in liquid form (correct me if im wrong). So in this case we richen up the needles setting slightly and look for that blue smoke again but also listen to what the engine wants. i do agree with you in the sense that if we where to keep the engine running at optimal temps, we would have to lean out the engine. But in this case that is not true, you can try it for yourself but beware that any damage done to your engine(s) i won't be responsible for. For testing purposes you could try lean it out and brap the engine a little and listen to what it does.. another odd but true example is when we have to richen the engine when the weather is really hot, this means the engine will become hotter quicker and we have to keep eye on temps not going too high. but how do we cool the engine when the weather is searing hot? To reduce temps again, we richen the engine, a good tune will keep the engine cooler but also lubricates it better, again look for a normal/good amount of blue smoke and listen to the engine. if it tries to rev up anywhere on the powerband on its own you know where to richen it little by little. if it revs up at idle or you have a higher idle then when you started, you have to richen it. Now i could go into glow plugs but what i know is the following: smaller engines till around .15/.18 use hotter glow plugs while engine from .21 and up us colder plugs. for some reason HPI's 5.9 big block (i believe this is a .36) recommends a medium plug(example) just make sure you look up the manufacturers listed usable glow plug for a specific engine otherwise you might be chasing a good tune till the sun goes down. Happy RCing!!!

@@VintageCR sorry yeah you're right about that lol but now that i see this again in winter the air is denser so the engine has to be richened but if the air was less dense then yeah i was wrong

Yes

Don't just go by the seconds, how is it performing?

you probably richened one needle richen the high and low.

Johnny Figueroa play with your low speed needle. small adjustments. try riching it first

Depends! At Full throttle? Same amount as any nitro engine. A nice puff of blue smoke!

JT12's R/C Videos. thanks man

The Low speed/ Low end are the same thing. The idle screw is something different. The idle screw controls the RPM the engine sits at when you don't give it any throttle. The low end adjusts the fuel mixture between idle and partial throttle

Okay great thanks. I have spent hours trying to get my buggy started and just can't do it. Feel like hitting the thing with a bloody great hammer