stillen supercharger to vsr top mounted turbo

Nissan370

so have to go see my tuner for a check up may be nothing major
when i start the car up to warm it i get a p300 code misfire random cylinders misfire
maybe nothing i dont normal get the code once i clear it and drive the car

also i am eating a lot of fuel up and maybe thats a by of going full return under full load i am seeing my afr gauge dip as low as 10.7 and that seams a bit rich to me

i will go see them next week maybe leaning her out just a tad will help on the fuel saving and bump the ponies up a few

0r it could be as simple as a failing spark plug we will see

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370z vsr motorsports single turbo/built motor 9.1cr 525rwhp/450rwtq @ 10.5psi (stock maf maxed out)