Quote:
Originally Posted by deanznz
for those with an SAE subscription (not me)
Direct Water Injection Strategies for Performance Improvement of a Turbocharged Spark-Ignition Engine at High Load Operation
Author(s): Davide Lanni, Enzo Galloni
sae.org/publications/technical-papers/content/2022-37-0007/preview/
they also have a book
New Fuels and Advanced Combustion Modes for Innovative Internal Combustion Engines
amazon.com/Advanced-Combustion-Innovative-Internal-Engines/dp/3725832099
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Water injection increases the compression ratio one can use by dramatically cooling the charge deanznz.
That works when you want power (and efficiency) at more normal AF ratios, but pgfpro is already having a hard time getting his crazy lean mixture to burn and is already adding heat.
Water also slows the combustion rate, requiring yet more timing advance.
Once he gets to the drag strip; well that's a different story!
There he might enable his water injectors for even better times, while blasting any carbon deposits right out the exhaust at the same time!
