Up grade air flow system

 

So I've drilled a 64mm hole in the air box. First impressions are it let's a lot more noise out! Hard to tell if it's improved performance, but the sound alone makes it feel sportier. I've lost my OBD dongle but when I find that I'll do some back to back 3rd gear pulls to see if it makes any difference to performance.

I couldn't find the dongle but I downloaded a performance app and did a couple of 0-100kmh runs. Now, this is not very scientific as it's just an app using phone GPS and I took it fairly easy on the start, but the results do correlate with how it feels. 12 seconds with the hole open, 12.8 second with it taped up. I'd say that's significant and worthwhile improvement for a 5 minute modification!

 

Bear in mind my Jimny has a 1.6 and they always feel a bit strangled at higher rpm compared to the revvy 1.3. Drilling this hole seems to have fixed that.

I still stand by my humble opinion for a Standard Jimny, it's not going to do much.
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The air filter system on the Jimny is designed for a 1.3 N/A engine,  the air filter system designed by Suzuki for the 1.6 is different.
What you have is a 1.6 with a Jimny 1.3 air filter system, it's likely it will impede the air flow for the 1.6.  I wouldn't want the original poster to believe it's instantly going to give more performance.

Not being a fun sponge. At my advanced age I've spent plenty of cash on go faster modifications and most didn't 
 

Replacement air boxes are available for as little as £12 on eBay, so there's absolutely no harm in trying! If someone gives it a go on a standard Jimny and shares their findings we will all know forever more.

Agreed.
Happy to be proven wrong and I would be the first drilling holes. Every bhp counts with my caravan on the back 
What is the function of the G3 under wing plumbing, anyone know?
I like to think it's some form of water ingress prevention system, but then it could be for any reason, I simply don't know.
What I do know is Suzuki don't fit anything just for the hell of it, so what's it's function?
 

As far as I can tell it's simply a resonator, to reduce induction noise. There is no element of it that would stop water ingress. At first glance it looks like it's been designed with routing to a snorkel in mind, but the path to the rear section is even more restrictive so that seems unlikely.