Running EBL Flash MPFI in a 1989 K1500.
385cid, FIRST TPI, 36pph gen4 Bosch, mild hyd roller Erson, AFR Vortec Eliminator heads, shorty headers, NGK BKR6EIX, 700r4
Just changed to this injector from gen3 34pph and wanted to go a grade lower fuel to 87 octane- previous dyno tune was just OK on 89 octane. Issue is getting audible ping on moderate to heavy throttle around 3600-4000 rpm, 80-95 kpa area, the tuner and myself have pulled timing back and I've run multiple VE learns- things are marginally better but still ping is an issue. I haven't smoothed or added fuel manually to area.
I haven't put a compression tester on as yet maybe today, the pistons are dished, build was spec for 9.5ish- perhaps octone tolerance is an issue?
What has the experience been out there?
One other question about intake track using 3in pipe from diesal filter going around battery, options are limited but I wanted to know when available charge air is lacking?
I can email log, won't let me post.
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