i did a quick search and didnt come up with much... im planing of getting my head port & polished.. i have a b16a2 with ITR tranny, aem cam gears, dc 4-2-1 headers, 2.5" custom exhuast, aem cai, p28 with mugen chip (vtec 5500).

now my question is what percentage of increase in power should i expect???


thanks,

Navid.

 

i wouldnt base your car or its numbers with anyone elses.
however, i did net 21HP at the wheels when switching my stock b16 head for a ported GSR head and ported GSR manifold. i also upped my compression about .5-.7 by running the spoon headgasket that was a onelayer having the head milled .20 and just the fact that it was a GSR head...

try it yourself, your results will VARY!