| second dyno of nation speed was my z just to see where it stands I was just comparing the two z's for hp gains (my z with stock turbos, 370cc, z1 chip(national speed) Carolina dyno chart was friends z with sport 500, 740cc, and nistune, I feel that it should of pull better numbers and im thinking valve timing is off or mabe thats all shes going to give but is wied the z has to run 10 degrees under a pull load instead 20 or 21 Tuner said I needed NGK Cooper plugs (auto zone pt number 4644) I remember the 6b 11b tips of plugs were longer to push the heat explostion away from the cylinder head top
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