Need to know what jets and rods to run in edelbrock carburetor.

[JohnnyD]

Hello again!

I've got a couple of threads going here, but I decided to post this in a separate one to aid anyone looking for this information. I'm going to run a D-64 dual carb manifold on my 273. What size jets and rods should I run in the carbs? I know that the stock ones will make it pig rich, but I haven't been able to find any information as to a ballpark size. This will be critical as I'll be breaking in the new cam while running this manifold. The carbs are a pair of Edelbrock 600 cfm's. I do have two old carter strip kits for these carbs. Any way they'll have the right jets in in them? Any help would be appreciated! Thanks in advance!

 

[4spdragtop]

Here's some info...
Edelbrock setup for dual quad
Dual quad info

 

[TT5.9mag]

When you double the available throttle bore area you cut the signal in half. Therefore the stock jets/rods won’t be “pig rich”. It’s likely it’ll be leaner than stock. For break in my suggestion is to disconnect the linkage on the second carb and run it on the primary. After break in add the linkage and start tuning them both together. And I’d start with the factory calibration in both carbs.

 

[perfacar]

i have dual fours on my 273, i used the stock afb carbs, they flow 462 cfm each. anyway mopar tune tips says to remove the vac spring from the front carb, close the curb idle screw, on front carb, screw in idle screws. on rear carb, change the sec jets to .063 remove the air valve blades above the sec bores, both carbs. it works, just food for thought. engine runs off the rear carb.i have progressive linkage.

 

[AJ/FormS]

You'll be breaking in the cam on the Transfers, with the rods buryed, so mainjetting at this time, is irrelevant.
Just make sure she gets plenty of timing after she starts. She might like 30 or more degrees, so just keep cranking it in until more timing does not produce more rpm, without regard to the actual numbers.
The more timing she gets, the more you will be able close the throttle to maintain a specific rpm.
The more you close the throttles, the less fuel will be drawn from the transfers.
Sooner or later, you will have to augment the transfers with the mixture screws. at that point, you will have enough timing.

After the break-in is over, THEN you can set the timing., and return the mixture screws to something like 2.5 turns, maybe less.