drilling holes in air box

[kirkyboy3]

okay after spending a lot of time looking around for induction kits I have stumbled across a lot of threads relating to drilling holes in the air box. I was after an induction kit more for the sound side of things as i know the power output isnt very good. There are obviously a few threats already on the forum however i couldnt find one for drilling it in the fr's air box

So how would i go about drilling the holes... where and how many holes etc????

car is a seat leon fr tfsi 2006

thanks

dan

 

[Slimy]

Have a look at what I did with my Toledo airbox for inspiration;

http://www.seatcupra.net/forums/showthread.php?t=274674

(second pic)

I made sure I didn't drill any holes on the side that faces the engine, although I reckon I'm still getting some heat soak from the engine. I got the sound that I wanted though!

 

[kirkyboy3]

okay then mate sounds like iv got the right idea... any idea where would be the best place to drill them on the fr tfsi???

thanks

dan

 

[Slimy]

Sorry, I can't really help with your car as I'm totally unfamiliar with how it's laid out. I just worked off the theory that I wanted to remove around 25% of the material from the bottom and two of the sides, so I drilled enough holes to achieve that.

The one thing you have to ensure is that you ALWAYS drill in the lower half of the box, don't drill anywhere above the air filter. It does sound so obvious but other people have done it without realising!

As a first step, it might be worth seeing if you can get rid of the airbox plumbing, that makes a big difference with the induction noise. Either remove it completely, or replace it with a thicker flexible pipe that exits into free air.

 

[kirkyboy3]

Yeh I'm going to have a go at removingthe front of the air box and then see how easy it will be to put holes in the bottom of the air box. I think I might have found out the area where it will benifit it best. I'm thinking about getting a cold air feed to the air box after the holes are put in! Good idea or no difference???

 

[Slimy]

Oh, I should have pointed out that I drilled the holes after I took the whole airbox out! I didn't drill them while it was in the car, I didn't fancy being a bit keen and heading towards my wheel through the arch!

A cold air feed is generally a good idea, but if you're looking for the performance benefits of big gulps of fresh air, it would probably be best to do that instead of the holes, instead of doing both. The good thing about a cold air feed is that if you remove the piping, you could always put it back together if you aren't keen on the result.

 

[Al]

any idea where would be the best place to drill them on the fr tfsi???

In your head

The air filter sits in the engine cover on the TFSi, and right under the filter is the engine which is nice and hot. Above the filter is the bonnet where water can come in when its wet.

The chances are that you will get zero gains in performance by doing this, and I would imagine, most likely no increase in noise . It may have increased noise and bhp in old Cavalier SRi's, but things have moved on since then.

Save your cash and get a proper intake as the intake is the most restrictive piece of hardware attached to the TFSi engine.

 

[kirkyboy3]

Hahaha loving the honesty!

I think I might just save up and get a k and n typhoon! Will my insurance go up a lot when I tell then I have a k and n?

 

[GainfulShrimp]

Will my insurance go up a lot when I tell then I have a k and n?

Don't think anyone can answer this as insurers seem to vary wildly from barely being bothered about mods - charging an admin fee and negligible premium increase - to refusing to insure a car if there are *any* aftermarket mods.
Seeing as you'll have to declare it to stay insured if/when you take the plunge, there's no harm in asking your insurer how much they'd charge in advance, so you have an idea of costs vs benefits.
Insurers/brokers that advertise themselves on being sympathetic to mods include Adrian Flux and Green Light, so maybe get quotes from them too..?

 

[Daza]

Drilling air boxes!!! bit max power MEH