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Have you guys tried going 100% DI at the lower speeds? It looks like Toyota went 100% DI at the peak scavenging areas closer to 2K rpm to avoid fuel short circuiting during scavenging (HC emissions) caused by PI but in the speeds before that it should be possible to go 100% DI as well and take advantage of the knock relief. I am not sure why they did not do it unless they thought the fuel mixing with 100% DI would be poor causing Soot.
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