The sentra spec-v also has dual intake runners. Here is a graph of a tuirbo spec-v.
The pink is with the butterflys closed at all revs.The blue is with them open all the revs.
http://67.163.162.60/cars/Manu...d.jpg
if they are stock you will end up with a pink low and then crossover to the blue high end.
Just something very interesting i thought. It shows that they actually do work and if you leave them open all the time you do loose low end power.
Hoping to see some with them completely removed and see what the results are.
