idk bout the duratec but the zetec can not handle that much whp on stock internals, and im pretty sure the same for duratec, gonefhsn blew his 2.3 on 22psi wich ball park would be that hp or more. for stock internals you never want to go above 250 so you can have a good fun time and not kill the motor
RISE AGAIN EGGYOLK316 WHP 296 WTQ ZETEC CREW #271
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