carb question, think im running lean

[85-302]

i checked the plugs on it jut for the hell of it and it looks like there are small white dots comeing out on the electrode i think that means its running lean. im running one step colder plugs, autolite. allso the metal portion which curves up above the plug is turning white.... if it is running lean how do i adjust it. thanks

 

[SwAmPf0x]

Small white dots could indicate detonation, as for being lean, what was the engine doing right before you checked the plugs? there are different adjustments for idling, highway cruising, full throttle etc..

 

[SwAmPf0x]

Oh and I want your car....

 

[85-302]

its been running fine, really strong. i use 93 oct. the dots arnt that noticable i just was hopeing i could catch something before it got started. oh and i just had the top of the engine rebuild w/ mild head work new carb(holly 650) and cleaned everything up real nice. i also have full exhaust and some other bolt ons. thanks for the comptement... i want a car like yours. workin on it

 

[maverick0716]

Sounds like you both have nice cars!

 

[hllon4whls]

i checked the plugs on it jut for the hell of it and it looks like there are small white dots comeing out on the electrode i think that means its running lean. im running one step colder plugs, autolite. allso the metal portion which curves up above the plug is turning white.... if it is running lean how do i adjust it. thanks

To adjust the mixture, you have to open the carb and install larger jets. You can get a whole box of jets for $30 or so from jegs. You would want to go up one or two at the most. It is common for carbed cars to go lean in the winter with cool dry air.

 

[maverick0716]

Can't you just adjust the idle mixture screw?

 

[85-302]

better to run a little rich than a little lean right? ill look into it thanks for the help

 

[hllon4whls]

Can't you just adjust the idle mixture screw?

The idle mixture screw is just that. It adjusts the amount of fuel for a good idle and nothing beyond that. The idle circuit will not affect the car at part or WOT.

 

[85-302]

ttt