Going from Edelbrock to Holley

[Steve Bisson]

The time has come to get rid of my Edelbrock carburetor. For all of last year I have fought trying to eliminate a persistent stumble as the rpm approached 4800. At first I thought it was an ignition problem. Spark plugs were changed, the fuel filter was replaced, the coil was replaced and the timing was rechecked. A check for vacuum leaks proved negative. As I was also getting a “stumble” during high g turns, I suspected the carburetor may be the culprit.

The current carburetor is a 600cfm 1406 Edelbrock with vacuum secondaries. Per a few knowledgeable folks over at the FF5 forum, I reset the floats, increased/decreased jet size in both the primary and secondaries and tried different metering rods; all to no avail. Another camp in the carburetor debates suggested disconnecting the fuel line, remove the air cleaner assembly and throttle linkage then label and disconnect the vacuum lines. The next critical step is to carefully remove the Edelbrock carburetor and deposit same in the garbage can. After that, I was to go online and order a 600cfm Holley double pumper 4150 which I did.

It should arrive by the end of the week at which time I’ll wait for some rain free weather and head on over to Jim’s (race-it) place to install and set-up. Jim promised he would not polish the new carburetor.

I’ll keep you posted on the results.