I'm at sea level and the colder it gets, the better it runs from start up to accelleration to cruising. Like today hovering at 32F degrees. It's a stock LG4 with rebuilt carb basically tuned to factory specs. Any thoughts on why or maybe offers from Greenland?

 

Cold air is more dense = more air going through your engine = more power.

 

Are you implying it runs poorly when its warm? Or ok warm, better cold?

 

it runs ok when its warm outside. once warmed up on a day that 50F or higher then RPMs drop to factory specs where I'm aiming for. That's about 550 idle when in sitting at a light drive. this morning's commute will be about 23F and the idle is going to probably settle at 700 rpm. My thoughts are to just make tuning adjustments when it's about 60F. vacuum is looks to be constant at idle hot or cold day at a hair under 15. it's a stock set-up.

 

adjust the idle air screws when it is warmed up

 

I'll check it out

 

Turned out to be a bent hanger. ~50F degrees today, so made small curb idle adjustment & checked dwell.. running rich ~25degrees on 6 cyl scale. thought I'd mess with that later & check secondaries (have been trying different hanger/rod combos for fuel economy). saw that the hanger was bent so one rod always let gas in even w/ secondaries closed. Carefully bent hanger back to correct shape, put rods back in, & problem solved. A little curb idle adjustment & dwell improved to 27 degrees, good enough for Valentine's Day.

 

sweet

keep her alive and pumpin