think high velocity. high cyl pressure, slow rod ratio. cause thats what u got now with a deflating cam at low rpm. i had a cam in a farmall, i could gain 20psi of cyl pressure by adjusting lash at .025, vs stock lash. stock lash, the grind deflated cyl pressure. a stock cam would have gained me 20psi more at cranking speed. i needed to deflate cyl pressure in mine to a resonable level, so i ran the lash at stock. but mine had a rod ratio of 1.39 vs your 1.90. but my psi to mechanical conversion scale was still accurate in both. lol.
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