|
4777 Baseline
The 4777 comes jetted 67/73 w/a 65 power valve. Primary and secondary pump nozzle is a 0.028”.
Check the operation and adjustment of the secondary accelerator pump. Like ericnova72 has said- the hole is likely an inadequate secondary pump shot.
Going by your vacuum reading, it does not need anything less than a 55 power valve.
|