Will soon be re-fitting my air-box with a few modifications to it. What I want to know is why do people drill holes on the top of it? Is it only to make it sound louder?
I would of thought that with holes on the top, cold air would be able to escape from the box before being able to be sucked in through the induction pipe?
Surely more cold air could be sucked in without any holes. I've said this before, I'm not to bothered by the sound as I have throttle bodies fitted which are loud enough. So would I be better off 'not' drilling holes?
Also, If I were to drill a hole at the front of the box, next to the original cold air feed to the box and then attach a pipe to the new hole which leads out to the front grill. Would this improve performance as there would be twice the ammount of cold air getting pushed into the airbox?
One last question. Read an old copy of Total Vauxhall over the weekend and noticed an airbox made by Mantzel, can't remember what its called but it had a seperate pipe leading from the box to somewhere near the cylinder head, what is this and what does this do?
What I'm trying to do is see whether you'd get more power by having no holes drilled in the box just have one hole drilled next to the cold-air feed pipe and run another pipe from the new hole to somewhere behind the grill. This way you are allowing alot more air into the air-box with-out having any 'open' holes where air can escape from. Surely this would be better? What do you think?
Any comments would be appreciated.