edelbrock carb question

[benno440]

just chasing some info on how to richen cruising - WOT on edelbrock carbs.
idle is plenty rich enough just need to richen the higher rpm's please

 

[Azure]

You can swap metering rods or a combination of metering rods and jets to richen the entire circuit or you can swap to larger rear jets to richen only the secondary circuit.

 

[benno440]

which ones will richen just the cruising speed? primary or secondary or both? and how do I determine which jet size is larger? the higher number jet?

 

[Mopars & Missiles]

which ones will richen just the cruising speed? primary or secondary or both? and how do I determine which jet size is larger? the higher number jet?

http://www.edelbrock.com/automotive/misc/tech-center/install/1000/1404_manual.pdf

 

[69a100]

which ones will richen just the cruising speed? primary or secondary or both? and how do I determine which jet size is larger? the higher number jet?

Read the book! http://www.edelbrock.com/automotive/misc/tech-center/install/1000/1404_manual.pdf

 

[benno440]

too drunk to read, 3/4 chivas regal down the trunk

 

[bigmanjbmopar]

they run rich anyway otb so just back out the idle screws almost all the way if that doesn't work then change out needles and springs per the guide and if that don't' make your eyes water than upsize the primary jets to 81+

 

[Meep-Meep]

Jets, rods and springs are the typical methods to deal with cruise, WOT and average mixture adjustment. The rod is a two step that hangs in the jet to reduce the area and the thin part of the rod is what helps determine WOT (or low vacuum) mixture. It's really an average between the two steps because the rods are always popping up and down based on vacuum levels. You also have the springs that determine at what vacuum level will make the power pistons (that control the metering rods) rise. For cruise you want to be steady state high vacuum with the rods all the way down. The secondaries are pretty much dumps and jetting is a way to deal with more WOT mixture adjustment. Edelbrock has a table that shows all the jet and rod combos and the resulting mixture given as lean or rich by percent.

 

[383man]

What Meep-Meep says is right. You can do alot of tuning on them with the metering rods. You can go with a weaker spring to keep the thicker step of the metering rod in the jet more to lean out the cruise some and go the other way to richen. And of course you have many metering rods to try also. Its not just jets but also the metering rods and that there gives you alot to tune with. Buy the tuning kit they sell as it gives you a bunch of jets and metering rods and I think some metering rod springs come with the kit also. I know when I cruise in my 63 I am usually only on my primaries. Ron

 

[benno440]

thanks all