So, fuel is injected earlier in the intake stroke on a cold engine. Did I understand this correctly? And somehow the effect of that and intake heating cause the engine to be louder. It's great to learn new things!
And, since you didn't say to the contrary, a custom tune will not cause harm in cold weather.
Interesting that a tuned diesel is louder than an untuned one. My guess here is though, that it is getting more gas (so it can develop the additional power) that tunes provide. So, more gas and possibly more air too (to balance things) means a louder burn, right?
- Jack
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