I punched a hole in the bottom of my air box. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Broadwayblues · 04-10-2002, 01:28 PM

Yesterday well after looking at my bank account, tuition, and mortgage coming up I didn't get an intake for my 92 coupe. So after thinking for a little while, I removed the "Y" piping from my air box leaving a nice 4 inch hole and then wondered what it would be like to just punch a hole in the bottom of the air box. I know that I am going to be buying a new filter every month, but isn't this what an aftermarket intake does? More air to the engine? I got a saw out and did it. I noticed a nice increase in power and the sound is sweet! Last month, I just went all around my car and R2 brakes in the front, clutch, tires and O2 sensor. Went from a good car to a great car. Umm is my car a S-13? I am not sure what the terms you guys use are.  Thanks for your input. I guess my next step is a muffler and a short shifter. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'>

*LanceS13* · 04-10-2002, 02:41 PM

I wouldn't think that gave you any more than 2-3hp, but it does give the car a throatier growl....and hey, it was free.

Your car is an S13.
May I suggest you replace the exhaust piping from the cat back with a pre-made aftermarket unit, or a custom one from a muffler shop...mandrel bent, of course.  Just a muffler isn't gonna do a whole lot.
BTW, welcome. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cool.gif" border="0" valign="absmiddle" alt='

'>

HippoSleek · 04-10-2002, 02:49 PM

what Lance said and
1) I don't know the design of the s13 airbox, but I'll assume you cut the hole before the filter?
2) get a K&N drop in filter.  You can clean it and it breathes better.

Broadwayblues · 04-10-2002, 07:36 PM

thanks guys and yeah, the hole is before the filter. lol

junia · 04-10-2002, 09:38 PM

Hey, I just did that yesterday.  I like the way my car sound now.  I don't want to change out my exhaust because I don't want too much attention drawn to my car.  What are some other cheap ways to make your car a little better?

*DSC* · 04-10-2002, 11:19 PM

Free stuff is hard to come by. I'd say other than the air box thing two other free things to do would be getting the perfect air pressure in your tires and a weight reduction. I noticed NO increase in power from the resinator box removal in my s14 but it sounds cooler and maybe I got 1hp *shrugs* yeah, it was free and it sounds cool. Weight reduction, I noticed a better "feeling" and again sounds cooler inside but still, no faster...not a noticable speed increase on public roads anyway. And getting the perfect air pressure definately made the car faster...best thing you can do to your car for free!
Really though, the best free thing you can do to make your car faster is to practice driving it <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'>

DuffMan · 04-11-2002, 02:29 AM

I did the same thing and dropped in a K&N filter. Honestly, I think this is probably as good as buying an actual intake because the stock platic pipe isn't all that resrtictive. The only other difference is flat vs. cone, and our flat filters are pretty big, and I think some  studies have shown that the cone doesn't actually flow that much more in our type of application.

04-10-2002, 01:28 PM	#1
Broadwayblues Zilvia Member Join Date: Apr 2002 Posts: 193 Trader Rating: (0) Feedback Score: 0 reviews	Yesterday well after looking at my bank account, tuition, and mortgage coming up I didn't get an intake for my 92 coupe. So after thinking for a little while, I removed the "Y" piping from my air box leaving a nice 4 inch hole and then wondered what it would be like to just punch a hole in the bottom of the air box. I know that I am going to be buying a new filter every month, but isn't this what an aftermarket intake does? More air to the engine? I got a saw out and did it. I noticed a nice increase in power and the sound is sweet! Last month, I just went all around my car and R2 brakes in the front, clutch, tires and O2 sensor. Went from a good car to a great car. Umm is my car a S-13? I am not sure what the terms you guys use are.  Thanks for your input. I guess my next step is a muffler and a short shifter. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'> __________________ "stop lights timed to 55 mph are also timed to 110 mph!" http://www.geocities.com/broadwayblues34/240sx.html 92 240SX Coupe! MB clear side markers Clear bumper lights 3 inch universal muffler w/ removable tip. Strut tower bar- Front OBX SS version 2

04-10-2002, 02:41 PM	#2
LanceS13 AutoX Junkie Join Date: Jun 2001 Location: MS Age: 43 Posts: 2,044 Trader Rating: (0) Feedback Score: 0 reviews	I wouldn't think that gave you any more than 2-3hp, but it does give the car a throatier growl....and hey, it was free. Your car is an S13. May I suggest you replace the exhaust piping from the cat back with a pre-made aftermarket unit, or a custom one from a muffler shop...mandrel bent, of course.  Just a muffler isn't gonna do a whole lot. BTW, welcome. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/cool.gif" border="0" valign="absmiddle" alt=''> __________________ 1992 240SX Fastback #47 DSP MS SCCA RX-7 ITS Project FOR SALE

04-10-2002, 07:36 PM	#4
Broadwayblues Zilvia Member Join Date: Apr 2002 Posts: 193 Trader Rating: (0) Feedback Score: 0 reviews	thanks guys and yeah, the hole is before the filter. lol __________________ "stop lights timed to 55 mph are also timed to 110 mph!" http://www.geocities.com/broadwayblues34/240sx.html 92 240SX Coupe! MB clear side markers Clear bumper lights 3 inch universal muffler w/ removable tip. Strut tower bar- Front OBX SS version 2

04-10-2002, 09:38 PM	#5
junia Zilvia Junkie Join Date: Jan 2002 Posts: 343 Trader Rating: (0) Feedback Score: 0 reviews	Hey, I just did that yesterday.  I like the way my car sound now.  I don't want to change out my exhaust because I don't want too much attention drawn to my car.  What are some other cheap ways to make your car a little better? __________________ 1990 Nissan 240sx hatchback, 1991 Nissan Silvia K's PS13, 1978 Toyota Corolla KE-30

04-10-2002, 11:19 PM	#6
DSC New Title Join Date: Aug 2001 Location: VA Posts: 3,454 Trader Rating: (0) Feedback Score: 0 reviews	Free stuff is hard to come by. I'd say other than the air box thing two other free things to do would be getting the perfect air pressure in your tires and a weight reduction. I noticed NO increase in power from the resinator box removal in my s14 but it sounds cooler and maybe I got 1hp shrugs yeah, it was free and it sounds cool. Weight reduction, I noticed a better "feeling" and again sounds cooler inside but still, no faster...not a noticable speed increase on public roads anyway. And getting the perfect air pressure definately made the car faster...best thing you can do to your car for free! Really though, the best free thing you can do to make your car faster is to practice driving it <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'> __________________

04-10-2002, 02:49 PM	#3
HippoSleek Nissanaholic! Join Date: Aug 2001 Location: elsewhere Posts: 2,081 Trader Rating: (0) Feedback Score: 0 reviews	what Lance said and 1) I don't know the design of the s13 airbox, but I'll assume you cut the hole before the filter? 2) get a K&N drop in filter.  You can clean it and it breathes better.

04-11-2002, 02:29 AM	#7
DuffMan Post Whore! Join Date: Oct 2001 Location: in a cardboard box Posts: 2,517 Trader Rating: (0) Feedback Score: 0 reviews	I did the same thing and dropped in a K&N filter. Honestly, I think this is probably as good as buying an actual intake because the stock platic pipe isn't all that resrtictive. The only other difference is flat vs. cone, and our flat filters are pretty big, and I think some  studies have shown that the cone doesn't actually flow that much more in our type of application.

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