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New Injectors on sti motor

Matt Holmes

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I have the motor tuned pretty good with a master fuel setting of 34 and the zone fuel numbers varying between 40-50. I am upgrading my injectors from 490cc to 788cc. I have a tuning module and a wideband datalogger but am looking for a little guidance on where to start. Any ideas on how much lower I should set the master fuel so that I'm not running way too rich to begin with?

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I should clarify that I have a pre LinkPlus model (not sure which exact version) with a master fuel and zone fuel range of 0-99. I noticed through this forum that the Link-Plus units have settings from 0-255. I am upgrading the injectors because I will be upping the boost and was close to maxing the injectors out as it was.

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