i currently have my gt with an e303 cam. i was wondering what is the biggest i could go with ported e7 heads, and rockers, i plan on putting new springs.f303, x303, or z303. and what type of rockers do these heads have 1.7 or 1.6
I have an e303 with the 1.7's and it works very nicely. The 1.7's give it quite a bit more lift...I'm not sure how much but I have been to it makes that e cam close to an f cam...Anyway...I can still pass a tail pipe emissions test every year. With the x or z cam you more than likely wont because of the duration.
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