- Member ID
- #3773
- Messages
- 1,492
- Likes
- 773
In the end, just don't lull your engines. This creates the low speed, high load condition that is the main precursor to LSPI. This can happen in any gear, not just 6th. Whether your wheels are spinning at 60mph or 10mph, it's the engine RPM and load your foot presents that can cause pre-ignition. In other words, spinning at 1800 rpm at highway speeds in 6th and 1800 rpm around town in 4th presents the same danger when you stomp the gas. The thing to visualize is that you create a high load (stomp gas) at a time when the engine is at low speed, irrespective of mph.
I've reached the point where if i'm approaching a stop sign but can probably just get away with rolling through it and gassing it 2nd gear, I WON'T. I'll come to complete stop (or very close) and rev match a downshift to first to get the engine speed up. A great indicator on our cars is if you hear the symposer make this ugly fart like sound, your lulling the motor and may have just presented it with high load at low speed. Make note of the driving conditions and don't do it again. I owned a speed3 when they were popping rods all over the place and no one could figure out why. LSPI is a very real threat.
Further info on the topic of LSPI and the research oil companies are doing better define/mitigate the occurrence.
https://www.oronite.com/products/lspi.asp
http://www.infineuminsight.com/insight/may-2015/investigating-low-speed-pre-ignition
I've reached the point where if i'm approaching a stop sign but can probably just get away with rolling through it and gassing it 2nd gear, I WON'T. I'll come to complete stop (or very close) and rev match a downshift to first to get the engine speed up. A great indicator on our cars is if you hear the symposer make this ugly fart like sound, your lulling the motor and may have just presented it with high load at low speed. Make note of the driving conditions and don't do it again. I owned a speed3 when they were popping rods all over the place and no one could figure out why. LSPI is a very real threat.
Further info on the topic of LSPI and the research oil companies are doing better define/mitigate the occurrence.
https://www.oronite.com/products/lspi.asp
http://www.infineuminsight.com/insight/may-2015/investigating-low-speed-pre-ignition