[Taskmaster]

Two questions:

Diameter of the intake tube

And does the shape allow for fitment in the stock airbox

Thanks in advance.

[Taskmaster]

Bump - anyone?

If someone wants to lend me theirs, that's also something I would be interested in.

[Zajac1]

Better buy Euro box with afe cone intake and silicone tube : )

[iahawkeye]

If he's like me he can't justify $400 for a piece of plastic and a useless Euro MAF... just a guess

[Taskmaster]

Originally Posted by iahawkeye

If he's like me he can't justify $400 for a piece of plastic and a useless Euro MAF... just a guess

Had one, and that's exactly what it is.

[iahawkeye]

I'd have one if it was say $200...

Side note I have an old (forget the brand) cone filter I can measure up. I might be doing the 3sim swap this weekend so I'll have the airbox out.

[Ali-E90]

I have an injen on my N52. Stock air box needs to be removed.

[Taskmaster]

Originally Posted by Ali-323i

I have an injen on my N52. Stock air box needs to be removed.

That's not exactly what I'm looking for.

First - what is the Diameter of the pipe? It's one size at the MAf section and larger post MAF.

Second - could the injen fit INSIDE of the stock airbox, if the back was removed? Is it too long, angled wrong, etc.

Update me on this, if you can, and I'll explain my theory.

[Ali-E90]

Originally Posted by TheAxiom

That's not exactly what I'm looking for.

First - what is the Diameter of the pipe? It's one size at the MAf section and larger post MAF.

Second - could the injen fit INSIDE of the stock airbox, if the back was removed? Is it too long, angled wrong, etc.

Update me on this, if you can, and I'll explain my theory.

I don't remember the diameter, but it was a snug/proper fit. I think oem intake tube is just over 3" for reference.

Good chance I'll be swapping my injen out over the weekend (all time permitting), if so I can measure the diameter.

If you were to hack the stock inbox it may fit, but not sure if it aligns well enough that it would be sealed around the tube like a Euro intake.

[Taskmaster]

Originally Posted by Ali-323i

I don't remember the diameter, but it was a snug/proper fit. I think oem intake tube is just over 3" for reference.

Good chance I'll be swapping my injen out over the weekend (all time permitting), if so I can measure the diameter.

If you were to hack the stock inbox it may fit, but not sure if it aligns well enough that it would be sealed around the tube like a Euro intake.

Let me know. The Injen should have a larger diameter, and it has a MAF sensor correction. I'm betting I could get a few extra hp and torque, especially with a closed box.

[Ali-E90]

Originally Posted by TheAxiom

Let me know. The Injen should have a larger diameter, and it has a MAF sensor correction. I'm betting I could get a few extra hp and torque, especially with a closed box.

I'm pulling it out in exchange for a Simota intake (that does sit in it's own box)... am I better off leaving my Injen and waiting to hear your theory / approach to get more HP/Torque?

[Taskmaster]

Originally Posted by Ali-323i

I'm pulling it out in exchange for a Simota intake (that does sit in it's own box)... am I better off leaving my Injen and waiting to hear your theory / approach to get more HP/Torque?

Without a datalog and/or dyno, I don't know. Let me know about the fitment, and I'll try to figure some things out.

[Taskmaster]

ANYONE?

[Ali-E90]

Pulled out my injen only to put it back. Stupid samota one I have doesn't quite fit right.

Tube diameter for injen is 3.25"

[Taskmaster]

Originally Posted by Ali-323i

Pulled out my injen only to put it back. Stupid samota one I have doesn't quite fit right.

Tube diameter for injen is 3.25"

Could it, in theory, fit inside the stock box?

And THANK YOU, by the way.

[Ali-E90]

Stock box in storage at my parents'.

May be a short while before I get to see it (couple weeks)

[Taskmaster]

Bump- anyone else?

[boro92]

The filter won't fit inside the stock box. The space is way tight in there. Not sure you would want to reduce the surface area of the filter either by dropping the size down. If you really want to do this, you are better off fabricating your own box out of fiber glass available from the auto store. Even shape the box out of tin foil and then use the fibreglass mix to keep the shape and paint it black. You will be better off that way than trying to retro fit it to the stock box.

[mantis]

Originally Posted by boro92

The filter won't fit inside the stock box. The space is way tight in there. Not sure you would want to reduce the surface area of the filter either by dropping the size down. If you really want to do this, you are better off fabricating your own box out of fiber glass available from the auto store. Even shape the box out of tin foil and then use the fibreglass mix to keep the shape and paint it black. You will be better off that way than trying to retro fit it to the stock box.

TIN FOIL

[Taskmaster]

Originally Posted by boro92

The filter won't fit inside the stock box. The space is way tight in there. Not sure you would want to reduce the surface area of the filter either by dropping the size down. If you really want to do this, you are better off fabricating your own box out of fiber glass available from the auto store. Even shape the box out of tin foil and then use the fibreglass mix to keep the shape and paint it black. You will be better off that way than trying to retro fit it to the stock box.

No, I would want to either use their filter (which should have a built in velocity stack) or I could invest in one that is longer instead of wider.

As far as fabricating the box, I'm not sure what I would make it out of...Fiberglass seems too messy, and I would need it to open from the top so the filter would be accessible, and I'd want it to connect to the stock grill airfeed.

[boro92]

Originally Posted by mantis

TIN FOIL

Not sure why that is funny. It is common practice in the boating industry for making molds for repairs.
Fiber glass does not stick to tin foil. You lay up the fiber glass on the tin foil and let it cure - the tin foil can be shaped to whatever you need for the mold (ie: shape it to a box or whatever of the correct dimensions - lay tinfoil on top of object - lay fiberglass on top of foil).

[boro92]

Originally Posted by TheAxiom

No, I would want to either use their filter (which should have a built in velocity stack) or I could invest in one that is longer instead of wider.

As far as fabricating the box, I'm not sure what I would make it out of...Fiberglass seems too messy, and I would need it to open from the top so the filter would be accessible, and I'd want it to connect to the stock grill airfeed.

If the goal here is using the stock box with a cone filter, then you will be losing surface area. That means a couple things. The obvious one is that it has less surface area for filtration (read: clogs up quicker), and the second is that the smaller the surface area, the greater the pressure drop. For an NA motor, you know that is not ideal.

I like the idea of tooling around - and maybe you are taking this from another angle where you are using an injen arm and making it work with the stock airbox (assuming the arm is greater diameter than the stock box). But as you likely know, it's all a tuned system. Larger diameter intake arm is going to yield a velocity drop in air flow from filter to the intake manifold - it will shift the power band. Testing will show whether this is for the better or not. Take that for what it's worth.

Sounds like you're after something interesting, and there is no harm in fiddling about. But out of curiosity, why not just go Eurobox at that point? You're after the larger intake arm? The car does not rev high to need too much volume - and the gigantic intake manifold accounts for much of the volume (the stock North American box accounts for this as well with the hump section on the box post filter).