gas mileage Mechanical vs Vacuum Secondaries

ramcharger said

Right here "These are competition carbs, and they are supposed to work this way. Why don't we just put leaner jets in them to get mileage? Because the PVCR's are small, and under power conditions, the carb will supply an overall lean condition. What you can do is lean the jets out, then enlarge the PVCR's to compensate for power situations."

Click to expand...

yep and would read better posted as ''hey, if you wanna squeeze all the milage you can out yer dp...then you'll have to up size the pvcr's when you lean out the jets so you don't run too lean under wot/hard xcelleration where the pv/pvcr's work''.

good stuff to know when really getting into it.

ME? I would simply change to a more aggressive billet metering block kit.
but consider if the carb is on the small side..you may be on the big side of the stock jetting and never have any issue with being too lean at wot.