Thermoquad........Ok AJ, WHAT NOW?
I have to disagree with some of AJs comments. A 292* cam in a 360 is going to want a LOT more timing at idle than 5* for best idle quality, highest vacuum.....& coolest running.
You don't see engine cooling mentioned much with idle timing. The FACT is that when the engine has the correct idle timing it runs cooler because the engine is more efficient & does less work. Less work means cooler running. Why is cooler important? Because the instant you step on the gas, is when the engine gets loaded.... detonation territory; with the engine being cooler, you reduce the chances of detonation.
I could never understand why DCR is referred to. It is a calculated number, from the intake valve closing event &....quite meaningless. It is supposed to, somehow, refer to the amount of air trapped in the cyl. It should be obvious that the aggressiveness of the cam lobes, port flow, max valve lift, intake manifold flow etc will all impact the amount of air the cyl ingests; yet none of these inputs are factored into the DCR calc.
See below for best idle timing example.
I have to disagree with some of AJs comments. A 292* cam in a 360 is going to want a LOT more timing at idle than 5* for best idle quality, highest vacuum.....& coolest running.
You don't see engine cooling mentioned much with idle timing. The FACT is that when the engine has the correct idle timing it runs cooler because the engine is more efficient & does less work. Less work means cooler running. Why is cooler important? Because the instant you step on the gas, is when the engine gets loaded.... detonation territory; with the engine being cooler, you reduce the chances of detonation.
I could never understand why DCR is referred to. It is a calculated number, from the intake valve closing event &....quite meaningless. It is supposed to, somehow, refer to the amount of air trapped in the cyl. It should be obvious that the aggressiveness of the cam lobes, port flow, max valve lift, intake manifold flow etc will all impact the amount of air the cyl ingests; yet none of these inputs are factored into the DCR calc.
See below for best idle timing example.