How rich when its cold?

[Gunfighter]

Was wondering How rich I should run my eng when its cold (below 50)? I'm just bashing now so I dont need max hp. Is it posible to run to rich?

 

[Candyman]

Can't really say exactly how rich you need to run. It all depends on engine temps and performance. Yes, you can be too rich. If you are, the engine will bog when trying to give more throttle and if it's extreme, you can flood it. I would start by just richening the mix 1/8 turn over your usual mix and run for a bit. Check the temp and performance and increase mix as needed.

 

[Gunfighter]

I did lean the LSN to keep it from bogging when I hit the gas. The pipe is spiting a small amout of fuel, but the damn thing is still running like a scalded dog. I guess Ill just richen it up when the weather warms up. Thanks for the advice.

 

[Runaway Jim]

One thing to keep in mind is that the temperature isn't the only thing to consider when tuning in lower temperature times of the year. When it's colder, the air the engine sucks in is denser. It's not running like a scalded dog because you leaned the lsn. It's running that way because you richened the hsn.

 

[Amoeba]

One thing to keep in mind is that the temperature isn't the only thing to consider when tuning in lower temperature times of the year. When it's colder, the air the engine sucks in is denser. It's not running like a scalded dog because you leaned the lsn. It's running that way because you richened the hsn.

Good point. Would it be safe to say that operating temps then are the best indicator for lean/rich setting regardless of ambient temp?

 

[Lessen]

No, not really. You could bee running 200 degrees when it's 5 degrees outside and be waaay lean. Now that's just hypothetical, but engine temperature is not a sure fire way to tune regardless of ambient temp. You just need to keep in mind that in warm weather you are trying to dissipate heat, but in cold weather hou are trying to retain heat. Either way, observed power and blue smoke are the tell tale signs of a good tune no matter what the ambient temperature is.

 

[Amoeba]

No, not really. You could bee running 200 degrees when it's 5 degrees outside and be waaay lean. Now that's just hypothetical, but engine temperature is not a sure fire way to tune regardless of ambient temp. You just need to keep in mind that in warm weather you are trying to dissipate heat, but in cold weather hou are trying to retain heat. Either way, observed power and blue smoke are the tell tale signs of a good tune no matter what the ambient temperature is.

Sorry, I assumed power and visible smoke was a given. I should have clarified.

 

[geronimo]

just a foot note. i wrap an old sweat band/ wrist over the head, seems to help keep motor temp up. i,ve seen some wrap tin foil around the head. peace