sen2two

under the intake ports on the plates...the small square, or rectangular openings. what are they for?



just curious...

j9fd3s

they pump air pump air thru those, into the exhaust ports, so help clean up the unburned hydrocarbons

hsmidy

yeah it just dilutes the exhaust gas with air.

heretic

Not dilutes. It actually ignites, or rather it adds oxygen to make the still-burning *rich* mixture clean up.



If you play with torches, it turns a reducing flame into a neutral flame.



Anything unburnt gets into the cat if present, where the catalyst combines the now-cooler remaining HC and O2 into more pleasant chemicals.

sen2two

cool, thanks