[quote=flu]If I blow up the engine, throw it away and get another…heh heh…[/quote]Build it right.. and it won’t blow up. Take a look at con-rods and pistons on the Miatas.. weak point when increasing horsepower & revs. Then start looking at the head gasket sealing. From what I remember, Miatas use an open deck block.. which does not like too much ‘boosting’.