reason being the head porter recomended against it... actually i was going to stick with the stock valve size, but the stock valves were deemed bad.. so they were tossed and uped to .5mm over size... also the fly cuts on the pistons are stock in size(modeled after the sr16ve pistons), also on the compression aspect, it is going to be a street motor, to be honest if it wasnt a street motor , i probably woldnt go futher than 12-13.1...... hmm flow figures, well on the head that is going to be used i dont have numbers.
bigger cams are definately in the picture, n1 are probabley temporary, but what proven cam is there to go with that is better than the n1?