Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

metering for a dodge 318

(1/3) > >>

74 Powerwagon:
Hi, I have rebuilt a quadrajet for my dodge 318 and would like some input from members on proper primary and secondary metering. I have a 74 W100 with only 90k miles, it's a retired park service truck. I will be putting on a 340 spreadbore intake and a rv cam with .429/.444 lift and 209/220 duration. The carb #17081206 is from a 81 Chevy pickup. I ordered some primary rods and jets from Cliff, not sure what size as I just ordered them. I have 3 different secondary rods that could work, I have DR, DP, & CH rods. I also have hangers H, L,M,N,P,R, & S to choose from. I have Cliff's book which is a great help with upgrades. I want to get the carb set up right so I can Install it with the cam and new timing chain all at once to break in the cam. I also live at 9K in the rockies. Thanks for helping me out if you could, Kent.

Ethan1:

--- Quote from: 74 Powerwagon on February 20, 2017, 11:43:55 AM ---Hi, I have rebuilt a quadrajet for my dodge 318 and would like some input from members on proper primary and secondary metering. I have a 74 W100 with only 90k miles, it's a retired park service truck. I will be putting on a 340 spreadbore intake and a rv cam with .429/.444 lift and 209/220 duration. The carb #17081206 is from a 81 Chevy pickup. I ordered some primary rods and jets from Cliff, not sure what size as I just ordered them. I have 3 different secondary rods that could work, I have DR, DP, & CH rods. I also have hangers H, L,M,N,P,R, & S to choose from. I have Cliff's book which is a great help with upgrades. I want to get the carb set up right so I can Install it with the cam and new timing chain all at once to break in the cam. I also live at 9K in the rockies. Thanks for helping me out if you could, Kent.

--- End quote ---

 Kent,
 Welcome to CHP!

 Is your carb a SMAB (single main air bleed) carb? Or dual?

 If SMAB, I would use a 52M Primary Metering Rod. If dual, .044" tip Primary Metering Rod, Cliff, has.

 Those secondary rods I think are a little too big. But, I don't know how much +.002" variance makes difference wise. So, I will leave that to the experts.

 All your hanger's will work except for the "H". I would go with the "L". 8)

Ethan1:
 Do you have any CV or AU  secondary rods?

74 Powerwagon:
 :) Thanks Ethan. The carb is a SMAB that is .082 in size. I ordered a set of primary rods and jets from Cliff so that will be well paired. I can get a a pair of CK secondary rods which are the same as AU rods. I also already have some DA rods, but they are probably too rich for the 318. Thanks for your help! I'll post when I get everything on the engine. I'm doing some light porting to a pair of stock heads and then getting fresh guides and 3 angle valve job with new valves. Kent

74 Powerwagon:
I just ordered a set of CK secondary rods, they are the same as the AU rods. Thanks for your time and expertise Ethan, Kent :D

Navigation

[0] Message Index

[#] Next page