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i have a ls vtec crx. its got a b18a bottom end, and a pr3 head. my question is, what engine did the pr3 originally come from? i think its either the 93 gsr or a b16. any information would help. thanks. -Sam

i also cant figure out what head i have, i hear there are a few heads you can use in a ls/vtec setup, but i just dont know where the code, stamp or tell tale charactaristic. heres a pic of my head.. http://img.photobucket.com/albums/v613/f18_trackjet/head2.jpg

i dont know what head i have, or where to find what head it is. is there some kind of stamp like in the block? its an ls/vtec setup.. i bought it and im trying to figure out how far this guy went. here are two pictures of the head on the motor. the valve covers been polished...

i bought a crx si, with a b18a ls/vtec. its also boosted so i cant hear if vtec is kickin in. theres a vtec pressure sensor and its hard wired into it appears to be the sensor itself. i think it works tho, becuase i unplugged it, it threw a check engine light, and redlined at seven somethin...

im running boost, but without an intercooler. (im getting one asap.. lol) my question is, would running a boosted engine without an intercooler increase the chances of getting detonation? thanks.