Induction mouth

**Guy_H** · 28-02-2007, 08:15 AM

Its a factory part - When they land, I'll post some pics!

**WRXconvert** · 04-03-2007, 03:08 PM

ok guys heres some pics of the ghetto operation, i have dremelled the air deflector off that was deflecting air away from the airbox intake. i feel as if it has made a slight increase in pickup and the turbo starts to spool a little quicker... also inlet temps must be a little lower, because now it is actually getting force fed some cold air. anyways heres some pics.

,

now what i want to do is make sure ALL the air that that mouth picks up goes to the airbox, to do that i am going to have to fiddle around with a few other things such as the airbox, and the intake tube, as well as the rear of the mouth. as you can see by the last picture there is still a little gap where the air can escape... and we dont want that... we want it all to go to the turbo... cos we are greedy little turbo junkies.

so the airbox is going to "smoothed out" and the inlet increased with a bell mouth pointing upwards toward the filter... as you can see the inlet isnt that big when stock.

**WRXconvert** · 04-03-2007, 03:08 PM

next i am going to find some suitable type venting... because this is too restrictive...

and last but not least, adapt something other that this back plate which will pickup all the air that the mouth picks up... im thinking PVC or something... not too sure yet...

**WRXconvert** · 06-03-2007, 05:14 PM

i am disconcerted as to the reason why so many people have looked at this but made no comments....

**Timbo** · 06-03-2007, 07:52 PM

Well, IMHO, there's really little power to be gained in either induction mouth/airbox mods, or exhaust mods apart from more noise. Which is fine, if that floats your boat. I'm happy to be proved wrong, but you have to post hard before-and-after evidence, and I've not seen it with other cars. My 2psi

**Vieussuex** · 07-03-2007, 10:12 AM

Originally Posted by WRXconvert

next i am going to find some suitable type venting... because this is too restrictive...

and last but not least, adapt something other that this back plate which will pickup all the air that the mouth picks up... im thinking PVC or something... not too sure yet...

Use some 80mm flame proof brake ducting for your inlet pipe and instead of using pvc piping and adapting the backing plate you could cable tie the end of ur new inlet pipe to the mouth of the feeder it would be alot easier.

Thats what ill be attempting today hopefully lol

**Bug_racer** · 07-03-2007, 10:34 AM

Ive dont these mods on the S3 , not sure how much of a difference it makes but it definately takes a long time to smoothen out the factory airbox .

**WRXconvert** · 07-03-2007, 05:36 PM

Originally Posted by Bug_racer

Ive dont these mods on the S3 , not sure how much of a difference it makes but it definately takes a long time to smoothen out the factory airbox .

cool i have time to play around.... what diameter inlet to the airbox did you use? im thinking 3 inch... and should i worry about directing it upwards toward the filter?
Timbo, in order to get to the 250-280 HP i want, i am going to have to upgrade a lot of things, the stock airbox and induction mouth will not support this amout of horsepower full stop (.) if you up the amount of boost you are producing... you should in turn up the amount of air the turbo can receive and get rid of... thats why airbox and exhaust mods are essential. im not going to put a pod filter into the equation at all, as this would wreck the whole idea of getting a ram air effect. A high flow panel filter and other induction mods such as enlarging the diameter of the inlet into the airbox as well as "smoothing" it out will allow you to flow a lot more air.
I guess what im trying to say is... go put a KO4 on your motor and leave your induction the same as it is now... then to compare, go and free your inlet and airbox up a bit, and tell me it doesnt make a difference.

**GTIJNR** · 07-03-2007, 05:42 PM

that deflector is there 4 diverting rocks & rain OUT of ur air box, thust the opening at the bottom, so yeah don't block all that area lol leave a small gap cos the polo truly got cold air induction means it will pick up anything get close to that grill lol air, insect, dirt, rock, bird lol... Good stuff, don't get 2 worry, u will enjoy the induction sound... just dont pick up any disease lol