Changed the plugs and wires...BIG difference!
The Best of Mercedes & AMG
1. a car never runs as good for daily driving when you put in a colder plug...
2. general rule of thumb for moving to a colder plug is 100 HP over stock, most C32's will never reach that level of performance...
one thing to note though:
a plugs temperature is not the only thing to take into account when considering which one to run...plug placement in the cylinder head is also something that MUST be considered...sometimes moving to a plug that protrudes farther into the cylinder head or protrudes less, will make a bigger difference in performance and daily driving then the actual temperature rating of a plug...
The C32 is a low static compression motor, with an added blower over the C320. With the blower engaged the effective compression ratio is higher than the C320, but with the blower disengaged, the effective compression ratio is much lower than the C320. Most of the time the C32 blower is not engaged.
The reason to run a colder plug, with extra boost or compression, is to keep the peak temperature of the plug under control, so it does not melt or cause pre-ignition.
The reason, to run a hotter plug is to keep the electrode clean and prevent fouling.
If the plug is too hot, then the timming could get pulled back (retarded), under max boost. Also, it is possible to melt away the electrode or crack the insulator.
I guess most people putting in the IK16 plug, are not tracking (racing) the car for long periods of time and spend most of the time, not in boost.
The C32 is a low static compression motor, with an added blower over the C320. With the blower engaged the effective compression ratio is higher than the C320, but with the blower disengaged, the effective compression ratio is much lower than the C320. Most of the time the C32 blower is not engaged.
The reason to run a colder plug, with extra boost or compression, is to keep the peak temperature of the plug under control, so it does not melt or cause pre-ignition.
The reason, to run a hotter plug is to keep the electrode clean and prevent fouling.
If the plug is too hot, then the timming could get pulled back (retarded), under max boost. Also, it is possible to melt away the electrode or crack the insulator.
I guess most people putting in the IK16 plug, are not tracking (racing) the car for long periods of time and spend most of the time, not in boost.



