richardpalinkas Posted April 26, 2021 Share Posted April 26, 2021 Have a question regarding scaling injectors, just fitted a walbro 525 and fuel pressure reg to my car, set base pressure at 4 bar as required, injectors are a bit of an unknown so I’m working off what the data was previously in the car, but what I am experiencing is good cruising afr on wideband, almost spot on under wot to redline, but I get a lean spike under decel, which I have decel fuel cut disabled. It’s not all the time, but if I’m coasting along, lambda is 1, but if I apply throttle, say 25% and come off throttle, I get 1.15lambda that slowly creeps back down to 1. Under all cruising I’m sitting close to commanded, maybe slightly rich. That being said, it did the same before upgrading fuel pump from 460 to the 525, dead times are the same, injectors I believe are sonic performance 1000cc. The sonic performance offset table is a lot different to the offset that was originally in my car. Can offset cause the random lean out under some decel applications? Quote Link to comment Share on other sites More sharing options...
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