TORQUERULES
Well-Known Member
From Wikipedia (which I usually avoid), but a decent succinct definition:Hi Matt, what is LSPI?
"Low-speed pre-ignition (LSPI), also known as stochastic pre-ignition (SPI), is a pre-ignition event that occurs in gasoline vehicle engines when there is a premature ignition of the main fuel charge. LSPI is most common in certain turbocharged direct-injection vehicles operating in low-speed and high-load driving conditions.
LSPI events are random and infrequent, and their effects on impacted vehicles can include very high-pressure spikes, loud knocking noises and sometimes catastrophic engine damage."
Dilution of the fuel mixture is often a contributor. This is why you see a lot of oil companies moving to new blends/formulations to help prevent this and a lot of people running catch cans, etc.
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