VCT and Spark

[rozay]

sorry if its a dumb question but are they basically the same?

Sponsored

 

[sandeale]

not even a little, vct is "variable cam timing", spark pertains to ignition usually measured in degrees and either before top dead center (advance) or after top dead center (retard)

variable cam timing is the ability to have the intake or exhaust cam open at differing degrees in relation to the crankshaft, unlike older fixed timing chain motors

 

[rozay]

so when tuners talk about timing they mean VCT?

 

[sandeale]

usually theyre referring to spark, it all depends on the context of the conversation

 

[Higgs Boson]

cam timing
injection timing
spark timing

airflow
fuel flow
ignition/spark

the three things needed for internal combustion. all need to be brought together at the right time under the right conditions.

 

[kris5597]

Anything related to timing has to do with crank position when it occurs, that includes IVO position, EVC position, and spark advance or knock retard. It's all in relation to where the crank is in relation to top dead center. Tuners in my world refer to timing usually as in cam position, I speak in regards to spark advance as in "ignition advance."

Sponsored