details:
gm 300hp crate engine - same as gm 330hp vortec, just with marine heads.
was carb before it went up in flames
bought tbi and harness from 97 gm 350
reworked the whole thing ditching what i don't need
and here are the results, no tune [no idea how], first crank. it seems like its starving of fuel up in higher rpm where it stutters for a millisecond..... i have external regulator set at 18psi..... would this be fuel related or tune related? i can only rev to about 4500 before it stutters again
https://www.youtube.com/watch?v=4ZvIvqdXKoI
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