so i read a mag the other day and it was explaining the truth about intakes. it stated that CAI's give you good mid range power, while SRI's give high end. i'm more than a bit confused...... anyone know the real deal?

 

go to the allmotor forum, they'll tell you about velocity stacks and other such lengthening tubes that cause air going through the pipe to move faster. actually try searcing the allmotor forum first for SRI vs CAI or search velocity stack.

 

I did a dyno couple years ago with a DIY cold air intake using the stock airbox and then a dyno with the CAI piping taken out.

with CAI: 2-3 hp advantage up to ~4000 RPM

w/o CAI: 0-1 hp advantage from 4000 to redline

on a mostly stock integra, only other mod was a DC 4-2-1

In other words, there wasn't much of a difference between the two, but it does exist. I personally didn't feel anything different while on the road, save for some noise and a slight change in throttle response. I imagine the difference between aftermarket intakes would be a little greater though.

 

I think it doesnt matter much from cai to short ram......

 

i've heard that cai gives more hp overall then sri because its colder air=more oxygen molecules get to the engine therefore bigger badder combustion in the combustion chamber

u know how u get better air flow with a polished intake ports, is there a way to poilish the inside of the intake tube to give better air flow or are they already polished?

 

Polishing the inside of the intake tube to give it a smooth finish will not give you better flow. In fact, it will creat a more turbulent air flow robbing you of power. Go check out the intake article at http://www.team-integra.net. That'll have everything you wanted to know, and more, about intakes. The part about polishing I think is in an article titled "Ideas: Flow Velocity, Flow Capactiy, Flow Qaulity."

 

It's the same concept as intake manifold runner length. A shorter runner will give higher top end gains. Longer runners give better low to mid power. SRI give better top end gains, but it's usually loss due to heat. Choosing the right intake length for your setup is critical, it can shift the powerband to what you desire. The inlet and outlet is import factor also.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by biassj &raquo;</TD></TR><TR><TD CLASS="quote">It's the same concept as intake manifold runner length. A shorter runner will give higher top end gains. Longer runners give better low to mid power. SRI give better top end gains, but it's usually loss due to heat. Choosing the right intake length for your setup is critical, it can shift the powerband to what you desire. The inlet and outlet is import factor also.</TD></TR></TABLE>
Then why is the operating range of a tunnel ram about 4k up and a low rise manifold works off idle?

 

Well im comparing short length to long length, im not saying the short length is bad at low rpms. You'll see diffrent gains with diffrent intake length, sizes, and filter choices. Just gotta find the perfect combo for setup. Intakes like other mods, you won't see huge gains.

 

i just like Short ram intake... vtec is more loud on short ram intake.. and CAI is good for High PRM and Short is good for LOW

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spoon Type-One &raquo;</TD></TR><TR><TD CLASS="quote">i just like Short ram intake... vtec is more loud on short ram intake.. and CAI is good for High PRM and Short is good for LOW</TD></TR></TABLE>

That's completely wrong. I don't know where you got that, but like I said earlier, you should go read the intake article (and all the rest for that matter) over at http://www.team-integra.net.

The temperature of the incoming air isn't as big a deal as people think. Once your car is moving, the underhood temps and ambient air temps are just about equal. It's all about the length and diameter of the intake tube. A shorter, larger diameter tube (generally sri) achieves its peak efficiency at a higher RPM, while a longer, narrower tube (generally a cai) reaches its peak efficiency at a lower rpm.

Hope this helps.

 

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

That's completely wrong. I don't know where you got that, but like I said earlier, you should go read the intake article (and all the rest for that matter) over at http://www.team-integra.net.

The temperature of the incoming air isn't as big a deal as people think. Once your car is moving, the underhood temps and ambient air temps are just about equal. It's all about the length and diameter of the intake tube. A shorter, larger diameter tube (generally sri) achieves its peak efficiency at a higher RPM, while a longer, narrower tube (generally a cai) reaches its peak efficiency at a lower rpm.

Hope this helps. </TD></TR></TABLE>

i was up til 2 am last night reading those aricles and overall now i think cai is better but the comptech icebox and the mugen thing seems to make more sense
u get best best of both worlds

one question is the comptech filter good or can i put a k&n filter in there?

 

k&n filter e-2427 can be used with the comptech ice box but only in conjunction with the oem rubber intake hose..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18b-se &raquo;</TD></TR><TR><TD CLASS="quote">k&n filter e-2427 can be used with the comptech ice box but only in conjunction with the oem rubber intake hose..</TD></TR></TABLE>

so it can be used but which is better the comptech filter or the k&n filter...also is the comptech filter made of papare or nylon (or wuteva they use with k&n filters)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18b-se &raquo;</TD></TR><TR><TD CLASS="quote">k&n filter e-2427 can be used with the comptech ice box but only in conjunction with the oem rubber intake hose..</TD></TR></TABLE>

so it can be used..... but which is better the comptech filter or the k&n filter...also is the comptech filter made of papar or nylon (or wuteva they use with k&n filters)

 

I don't remember off the top of my head which is better....I belive the Comptech flows better but doesn't filter as well, with the K&N filtering better but at a slight sacrifice to flow. However, either way, I'm pretty sure you're lookin at a very small difference in whp.

 

the comptech filter is foam, the benefit one may have over the other is very small if any..
e-2427 can be used with the icebox,but with the existing oem rubber intake arm..