Driz: Detonation is more an overpressure situation that turns the motor into a diesel.
Preignition is more when there's a shap edge or a carbon deposit that lights off the fuel early.
(this is way simplified before anyone jumps on me)
A bud brought his 600x300x75 China IC around to show me and I was all set to bag the shit out of it...... I opened the box had a good look at it and ordered a 100mm thick one the next day ;)
Vas: Usually by the time you hear a rattle on a composite HG the damage is done or has started...
Detonation has a very unique sound like somone has a can of small nuts in the motor.
In my case it's just been an ongoing development thing with the LPG fuel system and getting some bad info...
^ Doesn't take much.
Think of the dotted lines in toilet paper or a glass cutter, the cable wears a fail point you apply power and it snaps at that point.
This is another reason I'm NOT keen on Aluminium DS's as they're very easily marked giving them a stress riser.
AC is the perfect demister in Winter due to the way it dehumidifies the air ;)
(what a Mk3 that leaks water inside causing humidity>??? nah no such thing!!!) <sarc>
Vas: Correct!
My TTv8 had a really conservative tune and ran a Methanol injector as a bandaid as there were almost no electronics involved, tuning this way allowed it to live and I never had a drama with it.
The 7M HG design has built in fail points so a single heavy rattle will kill it...
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