Does anyone know the difference between a holley 0-80778 700 cfm and a holley 4778-4 700 cfm. They both have same jet size, power valve and are both 4150 type. also both have mechanical secondary. So whats the difference? Thanks.
Difference between holley 80778 and 4778-4
- Thread starter slx70
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the 80778 has 4 corner idle circuit..the 4778 has only a two corner idle circuit...
well...maybe...seen two different pictures of the 80778...
Holley no longer makes the 80778 ...trying to find the spec on it..
well...maybe...seen two different pictures of the 80778...
Holley no longer makes the 80778 ...trying to find the spec on it..
4778
Mechanical secondaries
Dual accelerator pumps
Manual choke
Two corner idle
Dual feed fuel inlet
1 timed (spark) port, 1 full vacuum, and 1 PCV port
Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
Mechanical secondaries
Dual accelerator pumps
Manual choke
Two corner idle
Dual feed fuel inlet
1 timed (spark) port, 1 full vacuum, and 1 PCV port
Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
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