Does opening the stock airbox result in more power and by doing this am I risking damage to the engine? Any info would be greatly appreciated.

 

It opens up more power, but you're risking damage to the engine because there is no filter to stop and of the debris from getting into the engine.

If you want more power just get an intake system. Fujita opens up about 11HP SAFELY and Injen is more reputable and opens up about 9 or 10hp.

You're much better off that way.

 

yea def. dont run with your stock airbox open. it wont hurt it to try it once. i did when i was stock and it sounded alot better.

 

Thanks Rico. The reason I ask is that there is no money for an intake system and I was actually contemplating a diy intake or what about dropping a K&N filter in the stock air box? Is this possible? Would this yield any gains?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k20prsi &raquo;</TD></TR><TR><TD CLASS="quote">Thanks Rico. The reason I ask is that there is no money for an intake system and I was actually contemplating a diy intake or what about dropping a K&N filter in the stock air box? Is this possible? Would this yield any gains?</TD></TR></TABLE>

I definantly would NOT reccomend any sort of "DIY" intake. I installed a K & N drop-in and it sounds a little throatier... as far as power gains i didnt notice anything. Someone posted a dyno not too long ago that showed like a 2-3hp gain.(if that)

My only reason for changing out the filter was the price($20) and the fact that its a cleanable element so you wont ever really have to replace your filter again.

 

Thank you tre for the info. Looks like I just may head out and buy one today. Until the $$$$$ is there for aftermarket parts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k20prsi &raquo;</TD></TR><TR><TD CLASS="quote">Thanks Rico. The reason I ask is that there is no money for an intake system and I was actually contemplating a diy intake or what about dropping a K&N filter in the stock air box? Is this possible? Would this yield any gains?</TD></TR></TABLE>

DIY I would advise against. Someone else in this forum tried it and I think he was having some issues with the system. You could drop in a K&N filter but it will yield very little if not any power gains. It's mainly for convenience in that it can be cleaned over and over rather than having to be replaced. It also slightly helps with gas mileage I believe.

 

You could do the swiss cheesed box if you like. Put in a K&N filter and drill (in a swiss cheese lik format) small holes throught the bottom of the intake. I dont believe this will yield as good performance as it has on prior civics.

 

an intake alone will not give you anywhere close to 11hp. get a K&N drop in and call it a day.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blue rocket &raquo;</TD></TR><TR><TD CLASS="quote">an intake alone will not give you anywhere close to 11hp. get a K&N drop in and call it a day.</TD></TR></TABLE>

There have been dynos of before and after that are close to that number, and there not manufacturer supplied dyno's there actual people from here and 8thgencivic.

 

The intake systems that give 9-11HP gains, are those SRI or CAI? or both? I know I've seen a Fujita SRI but not sure about CAI, and I think Injen has both right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WihaSi &raquo;</TD></TR><TR><TD CLASS="quote">The intake systems that give 9-11HP gains, are those SRI or CAI? or both? I know I've seen a Fujita SRI but not sure about CAI, and I think Injen has both right?</TD></TR></TABLE>

CAI should give more power. but yes injen does have both the cai and sri.

 

That's what I figured, don't think a CAI would give all that much more gain.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WihaSi &raquo;</TD></TR><TR><TD CLASS="quote">The intake systems that give 9-11HP gains, are those SRI or CAI? or both? I know I've seen a Fujita SRI but not sure about CAI, and I think Injen has both right?</TD></TR></TABLE>

Both. The Injen is rated at around 9hp or so. Not too miraculous, but still noticeable. Fujita only makes a SRI for the Si and they claim 11HP. I personally wouldn't go with AEM at all. Quite a bit of people have been having problems with their systems. Injen makes both a SRI and a CAI for the Si.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RICO_ &raquo;</TD></TR><TR><TD CLASS="quote">Both. The Injen is rated at around 9hp or so. Not too miraculous, but still noticeable. Fujita only makes a SRI for the Si and they claim 11HP. I personally wouldn't go with AEM at all. Quite a bit of people have been having problems with their systems. Injen makes both a SRI and a CAI for the Si.</TD></TR></TABLE>

I wouldnt personally go with the AEM either, but I heard they fixed the problem some how with their intakes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cnyej1 &raquo;</TD></TR><TR><TD CLASS="quote">

There have been dynos of before and after that are close to that number, and there not manufacturer supplied dyno's there actual people from here and 8thgencivic. </TD></TR></TABLE>

Any HP gains of 9 to 11 from an intake must be in the midrange, not on top end. I have yet to see a Dyno with intake only increase top end hp by anything more that 3 to 5 (at best).

I have a full CAI and with the Cat-back only got 3 whp gain on top, but 15 wph in the midrange.

There can't be that much difference in design can there?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hellzcivic &raquo;</TD></TR><TR><TD CLASS="quote">Any HP gains of 9 to 11 from an intake must be in the midrange, not on top end. I have yet to see a Dyno with intake only increase top end hp by anything more that 3 to 5 (at best).

I have a full CAI and with the Cat-back only got 3 whp gain on top, but 15 wph in the midrange.

There can't be that much difference in design can there?</TD></TR></TABLE>

Real quick search i found this guy who gained almost 20whp from a CAI and exhuast....
https://honda-tech.com/zerothread?id=1897778

This guy started with 170ish whp and ended up with about 184whp from a cai

http://www.fgcoupe.com/forum/showthread.php?t=1590

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cnyej1 &raquo;</TD></TR><TR><TD CLASS="quote">

Real quick search i found this guy who gained almost 20whp from a CAI and exhuast....
https://honda-tech.com/zerothread?id=1897778

This guy started with 170ish whp and ended up with about 184whp from a cai

http://www.fgcoupe.com/forum/showthread.php?t=1590 </TD></TR></TABLE>

Thanks for the links. That's interesting. My comments were based on my experience.

When did the I/E on mine, my stock whp was 185, then after I/E I went to 188. The midrange really improved and I could really feel it.

I guess every car is different.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hellzcivic &raquo;</TD></TR><TR><TD CLASS="quote">

Thanks for the links. That's interesting. My comments were based on my experience.

When did the I/E on mine, my stock whp was 185, then after I/E I went to 188. The midrange really improved and I could really feel it.

I guess every car is different.


</TD></TR></TABLE>

3HP umm there has to be more to it than that.. like temp and such.. cause those numbers are crap... same dyno?

 

remove the resonator, keep the box on and get a K&N filter.

if i didnt have an AEM CAI this is what i would of done.

 

Thats what i want to do. I'm sure if there was a 3" pipe coming from the fender/bumper straight to the bottom of the box you'd pick up some power. The box, stock filter, and intake pipe CANT be so restrictive that they rob 5+hp. I want to get my car dynoed in bone stock form and then start modding stuffs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hellzcivic &raquo;</TD></TR><TR><TD CLASS="quote">

Any HP gains of 9 to 11 from an intake must be in the midrange, not on top end. I have yet to see a Dyno with intake only increase top end hp by anything more that 3 to 5 (at best).

I have a full CAI and with the Cat-back only got 3 whp gain on top, but 15 wph in the midrange.

There can't be that much difference in design can there?</TD></TR></TABLE>

Those are typical gains. But some people might experience more on top than just 3 hp. Although I haven't officially dynoed my car yet I feel a much harder push both midrange and top end with my Intake and RH. I guess results just vary on some vehicles.

Not much difference with design. I would go with SRI if deep puddles and rainy weather are a concern.

 

What about removing the resonator and using a K&N filter in the stock airbox?

 

Damn dude you just bumped a 4 year old thread.

Oh and just get a cai.

 

Lol, oops, sorry... hard to see dates on my phone. Would you rather I post a new thread?

And why would I spend $300 when my idea costs only $30?