DIY - Air Box Mod - Page 14

SirStrider · 01-16-2007, 10:34 PM

resistance = loss and
turbulence = resistance and
tube length = resistance.
thus, turbulence + tube length = loss.
so, cutting off pipe seems like it would shorten it and reduce turbulence.

But, I'm no ME. Just an EE. Fluid Mechanics is way out of my league...

Quartz · 01-17-2007, 08:38 AM

I did this yesterday. It was easy enough and only took a few minutes. I wouldn't call the new intake sound a "growl". I was kind of disapointed in the sound from the intake. I expected it to sound bigger and tougher.

I didn't reset the ECU and I can't really tell any difference in the performance. IMO changing your filter regularly would help at least as much, but this is easy and free.

BTW, the instructions were well done and easy to follow.

SirStrider · 01-17-2007, 03:44 PM

Quote:

Originally Posted by Quartz

I did this yesterday. It was easy enough and only took a few minutes. I wouldn't call the new intake sound a "growl". I was kind of disapointed in the sound from the intake. I expected it to sound bigger and tougher.

I didn't reset the ECU and I can't really tell any difference in the performance. IMO changing your filter regularly would help at least as much, but this is easy and free.

BTW, the instructions were well done and easy to follow.

Did you put in a high-flow filter?

Quartz · 01-17-2007, 04:24 PM

No. I will this weekend when I have time. However, my thinking is that if the shorter tube really helps, it should help with the old filter.

Hot_Titan · 01-17-2007, 04:38 PM

I'm definetly gonna heat up the knife and do this myself as soon as it comes back from getting the truck bed resprayed...btw I'm also having full synthetic oil change done does this help performance at all?

Good Work Aggie!!

3Riverssouth · 01-17-2007, 06:15 PM

Quote:

Originally Posted by Hot_Titan

I'm definetly gonna heat up the knife and do this myself as soon as it comes back from getting the truck bed resprayed...btw I'm also having full synthetic oil change done does this help performance at all?

Good Work Aggie!!

I'm using Mobile fully synthetic but I have not really seen a difference as of yet. Has been about 1000 mile since the oil change.

amati5 · 01-17-2007, 06:49 PM

Quote:

Originally Posted by HudsonValleyTitan

Please please please someone explain to me how they think this mod does anything but "tune" or change the tone of the intake air? (Bose' wave radio has already done this!) A 2" opening, be it 2 inches long or 5 inches long, still allows the exact same amout of air into the airbox. Other than maybe making it sound faster, I don't see it changing anything.

I can't explain but I can share what I observed at the dealer. I was bored waiting for my car at the parts store. They had one of those KN filter demonstration unit on the counter where you can see how high the ping pong ball rised up in a tube by the air sucked in by a fan through oem or KN filter. I used a piece of paper and cut it to the same width as the openning (the filters size). I rolled it to a tunnel shape and fit across the surface of the air filter. The opennings of the tunnel were about 3 in tall and as wide as the filter. As soon as I put the tunnel in place, the ball dropped immediately to the bottom.

sc186 · 01-17-2007, 08:23 PM

Your makeshift tube was an inlet as opposed to an outlet like the tube the DIY mod removes. There is a big difference in inlet airflow through a static piece of pipe depending on the shape of the mouth, as the air is coming from all directions.

That being said, it would be a mistake to remove the piece of pipe from inside of the fender.

amati5 · 01-18-2007, 09:58 AM

Quote:

Originally Posted by sc186

Your makeshift tube was an inlet as opposed to an outlet like the tube the DIY mod removes.

Your're right! Didn't think of that. Thanks for clearing it up.

QueenCityTitan · 01-20-2007, 10:28 AM

Well I just did mine...I will have to go out and get a "High Flow" filter to see what happens...but DAYUM that F-in snorkel tube is hard to get out of the airbox....PISSSSS! At one point I fired up the dremmel and thought maybe I should just leave the snorkel in and only remove the top 1/2 of the tube...that should do about the same thing...well my battery in my dremmel was dead...and I was in a hurry to get this done...so I finally yanked the bastard out and ended up chipping a small piece of plasic from the exit tube in the airbox...nothing serious though. After I got the snorkel out I just used a sawzall to shorten it. The main reason I even considered doing it was because of that diagram and all of the E=MC(2) stuff...sounded like someone put alot of thought into this...and if its good enough for Einstein its good enough for me!

Also considering doing the 2* timing...and my stealer's shop manager said that he'd do it for 40 bucks...but he keeps trying to talk me out of it...saying something about the rods or pistons or something will end up hitting something if you change the timing...sounds like he doesnt know what he's even talking about...which makes me even more scared to have him do it in the first place.

sudden urge · 01-20-2007, 10:47 AM

Quote:

Originally Posted by QueenCityTitan

Well I just did mine...I will have to go out and get a "High Flow" filter to see what happens...but DAYUM that F-in snorkel tube is hard to get out of the airbox....PISSSSS! At one point I fired up the dremmel and thought maybe I should just leave the snorkel in and only remove the top 1/2 of the tube...that should do about the same thing...well my battery in my dremmel was dead...and I was in a hurry to get this done...so I finally yanked the bastard out and ended up chipping a small piece of plasic from the exit tube in the airbox...nothing serious though. After I got the snorkel out I just used a sawzall to shorten it. The main reason I even considered doing it was because of that diagram and all of the E=MC(2) stuff...sounded like someone put alot of thought into this...and if its good enough for Einstein its good enough for me!

Also considering doing the 2* timing...and my stealer's shop manager said that he'd do it for 40 bucks...but he keeps trying to talk me out of it...saying something about the rods or pistons or something will end up hitting something if you change the timing...sounds like he doesnt know what he's even talking about...which makes me even more scared to have him do it in the first place.

I guess you did not read about the red-hot knife trick. No reason to remove anything, and it takes 15 minutes total at most.

QueenCityTitan · 01-20-2007, 06:03 PM

you know...I actually thought about using a hot knife...I have an electric one...but I was too scared I'd hit the bottom of the airbox by accident.

EVO8 · 01-21-2007, 07:26 PM

I don't see this mod as a performance mod. I do see this as a noise mod though. Personally I don't think it's worth chopping up my stock intake.

EVO8 · 01-21-2007, 07:40 PM

18 years of drag racing and owning my own car shop, I think is enough learned.

ablexus · 01-21-2007, 08:30 PM

Before e-penises start getting waved around, I think that there is plenty of information on both sides of the house to give reasons why and why not to get this done... and those that have done it have been pretty much unanimous in their verdicts.

Don't knock it until you try it. There is more than one person on here with automotive experience. Even minimal gain is good for the whopping price tag of "free".

Andrew