[highcking]

A few extra data points on my Loadomatic system. Timing results:

No vacuum lines connected: 6 degrees BTDC
All vac lines connected: retarded into ATDC range
Ported vacuum only: same, retarded into ATDC range
Manifold vacuum only: 6 degrees BTDC

The problem I am trying to solve is a strange form of poor performance. Engine starts instantly, never misses, backfires, etc. and idles smooth. Problems? Hesitates on sudden acceleration, though I can see the accel pump jets squirting. Weirder problem is that engine rpms do not come up with pressing down the accelerator pedal slowly. (Linkage is free and moves fine by hand.) You can get all the way to the floor and be going 35 mph. If you pump the pedal, you can get the car moving to higher speeds. Without pumping, you’re dying on a hill. With a 200 hp Y-block!

Holley 4000 is a Suter rebuild from a few years back. Electric choke works fine, choke plates open when warmed up. I have another rebuild I can slap on if need be. I just can’t figure how the engine can be turning low rpms (albeit smoothly) with the pedal almost to the floor.

Bill in Luray