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One of the first orders of business when switching to speed density is to bump up the fuel delivery mapping to a safe level. It's always better to tune from rich to lean. Based on our experience with big-cube LS1s we went ahead and cranked up the entire main VE table by at least 25 percent in some sections--and by even more up top. It should be noted that all other relevant parameters must be adjusted first too. For instance, if larger injectors are installed, the injector tables must be corrected before getting started. It's important to 'correct' everything before 'tuning', otherwise you'll be tuning around incorrect parameters. View Related Article
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