67 chrysler300
Member
. I have an Eddy Performer 750 cfm with electric choke. It has the original jets both primary and secondary. I changed the metering rod and the spring however. Went with a rod that keeps the cruise mixture the same but makes the power one stage richer. I guess it had the orange spring in it and I changed it to the silver spring to make the power stage come in sooner. I have the original pump shooter with the setting at the top (I think) hole.
It generally runs OK but does have some issues. When the engine is cold, it kind of sputters a little at light throttle. Sometimes it backfires! It also kind of surges at steady speeds leading both my mechanic and I too think the cruise setting may be too lean. I tried the metering rod that was one stage rich both cruise and power. Although it didn't surge, mileage was terrible (bout 8 -9 mpg) and performance was no better than with the stock metering rod.
I have two calibration kits (for both Performer and Thunder carbs) and I have the entire set of pump shooters.
Couple of questions:
Which hole is the top hole in the accel pump rod? The one nearest the carb (where its set now).
I know the springs bring the metering rod up to the power stage at certain vacuum readings. It had the orange spring in the carb stock....Edelbrock says it stages at 4 or 5 inches of mercury. Isn't that when the throttle is almost floored?? My car has a vacuum guage. That's why I put the silver spring in. Supposedly stages about 8" of Hg. Is the vacuum reading given by Eddy when the spring starts to release or is fully released??
Which spring should I use?
Sorry bout the lack of specific part numbers. My Eddy books are downstairs and someone is sleeping and I don't want to disturb.
Ok, my car is a 67 300, stock 440 TNT with electronic ignition conversion and TTI exhaust. Its and automatic with 3.55 rear gears
It generally runs OK but does have some issues. When the engine is cold, it kind of sputters a little at light throttle. Sometimes it backfires! It also kind of surges at steady speeds leading both my mechanic and I too think the cruise setting may be too lean. I tried the metering rod that was one stage rich both cruise and power. Although it didn't surge, mileage was terrible (bout 8 -9 mpg) and performance was no better than with the stock metering rod.
I have two calibration kits (for both Performer and Thunder carbs) and I have the entire set of pump shooters.
Couple of questions:
Which hole is the top hole in the accel pump rod? The one nearest the carb (where its set now).
I know the springs bring the metering rod up to the power stage at certain vacuum readings. It had the orange spring in the carb stock....Edelbrock says it stages at 4 or 5 inches of mercury. Isn't that when the throttle is almost floored?? My car has a vacuum guage. That's why I put the silver spring in. Supposedly stages about 8" of Hg. Is the vacuum reading given by Eddy when the spring starts to release or is fully released??
Which spring should I use?
Sorry bout the lack of specific part numbers. My Eddy books are downstairs and someone is sleeping and I don't want to disturb.
Ok, my car is a 67 300, stock 440 TNT with electronic ignition conversion and TTI exhaust. Its and automatic with 3.55 rear gears