ViPER1313
SHO Member
iirc, someone had a dyno graph w/ no filter or box at all where it was only 1 hp better than the stock filter/airbox. based on this, I struggle to understand how any other intake could be worth 5 hp.....
I have dynoed my SHO on 3 separate occasions.
1st time I did back to back dyno runs, one with the stock airbox and a K&N filter, one with the airbox popped open and me holding it up in the air. I gained 2 or 3 whp when I opened up the box.
2st time, once again, back to back dyno runs, one with the stock airbox and a 5k mile old paper filter, one with the airbox popped open and me holding it up in the air. I gained 4 or 5 whp when I opened up the box.
3rd time was N20 testing.
There is a small amount of power to be had by opening up the box IMO, although I have had other members say it's not fair to test like this because the fender well has positive pressure at speed that forces more air into the box

