Forums Forums Enthusiast Forums A - Z Autowirral Cold Air Feed Pipe

Not saying he shud get rid of it,i mean they do make a nice noise. But ive realised that,for me at least, a drilled airbox makes MORE noise than a 57i and due to the radiator placement/front bumper grille on escorts cold air feed is hard to route so without lots of thin tubes it'll be hotter than airbox.

It may be different on vectras but judging by that pic,it looks like his ducting will have to come very close a the manifold which wont halp matters. But if the noise outweighs the possible performance decrease then its all a go

there are a couple of holes witch are quite hard to see in that pic about the size of apples in front of the filter witch should be allrite for a bit of fair sized ducting the go to the bumper

Maybe it was unclear, I want you to elaborate on why a cone filter is better on a turbo'd engine. I am not saying that true/false I just wish to hear your views on it.

Also I dont mean to insight an argument but Scoop you have said on many occasions that filter cones are basicly crap - I have picked up on this negative attitude towards them in a few topics. Your admitting YOUR own personal view in such a way it can be seen as 'Your scoop and you know all' - To combat this you could simply add 'Well in my personal opinion....'

The line between opinion and fact is getting confused - Maybe I should start a thread up about filters to get an array of people views and experiances

Also to add,
Jonny, from the looks of that picture I would say keep the pipercross, you will not get 100% cold air unless you buy another style filter, so it will breath some hot air, but nothing like the heat given off directly off the manifold.

You have already taken steps to get a cold air feed, maybe even get a filter shield? Am sure you could get one made up pretty easily

dont demon tweeks sell heat sheilds. im sure green cotton filters sell a heatsheild. have a look on demon tweeks site.

Ill make an ammendment to my sig. All post made by me are MY opinion and are not technological fact.

Think of my turbo theory as this

People is actually units of air (to understand air mass easier)
Door is the entrance to the airbox/cone
Seconds,actually microseconds

100 people can fit through a door at a rate of 3 people per second,when the turbo spools up it pulls the people in harder,but they are restriced by the small size of the door,so we need a bigger door. A cone doesnt really have a door,it just has a penetrable surface that the air just flows straight into when sucked so theres nowhere near as much restriction


Reason its good on a turbo is because they eat vast amounts of air compared to an N/A engine

A good airbox can happily flow enough air to feed the engine even when its eating at its most (such as 6000RPM)


Post in the opinion of the poster using his thought process on airflow,may not be technological fact,u'd have to ask a scientist

Like the example, might not be strictly true but gets to the point.

Correct - Turbos relie on a healthy supply of air that will not be exhausted at high revs. Air temperature does not really come into it on a turbocharged engine simple becos most have an intercooler - The I/C has the job of cooling the air so it doesnt matter too much where the filter is mounted, and even if it breaths abit of hot/warm air that can be rectified.

Since N/A cars do not use a Intercooler they are relying on the filters location to get it the air it needs. Lets not take the emphasis (sp) off the fact that hot air doesnt damage/harm the engine in anyway, it just doesnt give the performance gains that cold air does

on a vauxhall the cone air filters are not ment to be used, regal have proven this by doing 3 rr tests, the most gain was from an irmscher (spellng bad) airbox. the biggest loss was from the cone, even a viper kit is useless on a vaux imho as a fella who my bro works with has a 320 zafira gsi and he hasn't changed the airbox

for a "noise" point of view keep the cone but for power with mild noise get the box

A viper is useless?? I cant see how that is so as it IS an airbox.That does give more air and cooler air than the vaux item. So the laws of mechanics say it shud be best! Unless it maybe runs too lean with it fitted?

scoop2004 have a look in total vauxhall and you will see most users of induction kits use them for noise. as i said before they are proven to lose power on the vectra range.

look on fleabay as i picked up a full induction kit with airfeeds

i know most people use em for noise as IMO thats all theyre good for,unless fed with air properly or turbos (where airboxes just arent good enough)

However the viper is different. If its been proven that it doesnt run well on vectras then there u go. The different amount/temp of air obviously cant be matched for fuel by the vec sensors/ECU.

not getting involved in anyones argument here..

But

you should all have a read of this dudes writeup on how he did his cold air intake.. its a good laugh and might give you some ideas.

here