i have a 01 busa with just yosh slipons for mods
i had it on the dyno and the air fuel ratio was off the chart started at around 19 then works down to 13 little before redline. i was going to get it remapped with a yosh box but i think ill get a pcii since im planning on getting a full exhaust in the next few months.
is this how it should be with just the slipons?