440 Engine tuning suggestions
Never heard of a Holley dual plane intake for the 440...
Something in the combustion chamber is too hot, enough to provide ign to the mixture after the key is turned off.
The cam is sizable for a 440 & will want at least 30* of timing at idle.
What will this do? Engine will run cooler; idle smoother; & will also allow a lower idle rpm. Best way to do this is with an adj vac adv unit connected to manifold vacuum. In the 70s, with all the pollution crap, engines ran hot....sometimes too hot. The fix to reduce temps was to switch from the useless ported VA to MVA....
Idle/ign timing is probably the most misunderstood topic on this forum & others...
Never heard of a Holley dual plane intake for the 440...
Something in the combustion chamber is too hot, enough to provide ign to the mixture after the key is turned off.
The cam is sizable for a 440 & will want at least 30* of timing at idle.
What will this do? Engine will run cooler; idle smoother; & will also allow a lower idle rpm. Best way to do this is with an adj vac adv unit connected to manifold vacuum. In the 70s, with all the pollution crap, engines ran hot....sometimes too hot. The fix to reduce temps was to switch from the useless ported VA to MVA....
Idle/ign timing is probably the most misunderstood topic on this forum & others...