Like the title states, my AEM CAI (2.5") has become a restriction, and I'm looking for a larger intake for a 6th gen 4cyl Accord. Preferably 3" or larger.

I know someone's going to say eBay, but please keep those suggestions to yourself unless you have some personal experience to offer regarding fitment or durability, and can provide a link to the seller's store. Thanks in advance.

-Jason

 

Honestly, why would you expect an answer other than eBay?

An intake is nothing but a tube, toss a filter on it and you're done. It's tough to mess up a 3" aluminum tube. You're safe to get one on eBay.

 

lol, I have nothing against eBay, I just want something that's not going to have serious fitment issues. I have enough headaches with this car as it is. Just looking for someone that might have had good experiences with a particular item/seller.

Right on.

 

For my 94 accord I just got a genaric e-bay 3" for a prelude. It fits perfect. I would be willing to bet that the one's for the 97+ prelude will work. I would just swap out the pos filter for a K&N filter.

 

Gotca, makes sense.

I rocked both a CAI and SRI from eBay, no issues at all.

The other option - which I think I'm going to do is just get an ITR intake arm which to my understanding is large and a stock air box.

 

Your AEM was engineered and tested, that is why it's 2.5" and not some huge tube. What makes you think it has become a restriction? A larger diameter intake won't necessarily yield more power. If you read around online, there have been all sorts of studies on intake systems, restrictions and design on N/A engines. Most all of them say that huge diameter tube or no restriction whatsoever actually significantly decreases power. I also read that running an intake with no filter or running just a throttle body (not that you would ever do this) also reduces power. Supposedly it has alot to do with air turbulence and density of the air charge within a certain range of the intake source.

I previously had an aluminum $70 APC p.o.s. a few years ago (yes APC... I know) and it did nothing for power besides off idle throttle response and noise. I have a AEM cold air intake now and it's night and day over stock and the APC. The only obvious difference I saw between the two was the APC had a larger tube (I wanna say 3") I also put a K&N filter on there and it's just wonderful.

 

You need to understand his application first. I'm sure he's well aware an AEM intake is engineered for his stock/lightly modded vehicle. Refer to his build thread however. He has cams and is bottle necking at the intake and exhaust side. He NEEDS the air.

https://honda-tech.com/forums/honda-accord-1990-2002-2/f23a1-bisimoto-level-2-camshaft-independent-test-2526367/

^ thurr

 

I think something custom is going to be your best bet.

 

That sounds like it's worth a try. I spent about 10 minutes on ebay last night looking at Accord intakes, and didn't see a single one that actually specified it was 3.0" or larger.





I'd like to have a CAI so I can cut it like my current AEM to use as either CAI or SRI. I'll look into the ITR intake, but I think the eBay pipes might be cheaper after you include the "JDM" markup.




https://honda-tech.com/forums/all-motor-naturally-aspirated-44/engine-drawing-vacuum-high-rpm-2540913/



Helmholtz resonances and induction tuning. Yes, I'm very well aware of the effects intake length and diameter have on pressure waves 'forcing' air into the motor.

When a 2 3/8" pipe begins to create vacuum while air is being pulled through it, the pipe is too small. Simple enough for me.


Still just one cam. I haven't surrendered to the dark side yet.


I agree with you, but I'd rather find a pre-fabbed intake pipe for $30-40 that fits well, than spend an extra few dollars and a few more hours on this never ending project. As little time fabbing parts as possible is my goal at this point. I'm getting a little tired of one thing leading to another on this Accord, granted that's guaranteed to happen when you're modifying cars.

 

Darkside > *

I do know AF, that those eBay filters are advertising 3" for the opening. Getting the Prelude one may guarantee a 3" diameter one.

 

And that's exactly what I'm thinking. I'll check them out tonight.

 

I have right now a 3" AEM CAI from a Prelude. Fitment is great. Although the bracket that holds it down is a little short of the bolt hole. I had to get creative, and ended up making a bracket to hold it down securly. Otherwise, the intake, at idle, would rattle against the engine compartment that drove me insane.

As stated already, knock-off or name brand, the piping is the same. Usually people in California opt for the AEM or Injen to stay legal because they only have those Carb stickers.

 

I bought a no name cai on my old civic 1.6 vtech. It didnt do much of anything except make my throttle response slower because the tube was too long. I decided to by a proven AEM cai and it was worth the money. Its engineered for your vehicle unless you have a cam or other big boy performance mods. I actually ended up getting a short tube version and it worked even better for my around the town street light drags and spirited driving. The cai tube has such a low air pressure until you can get moving. Im speaking from experience.. get one with a water check valve or buy it also. I hydrolocked my engine a couple times going through big puddles. Clean out your throttle body with an atomizer of Seafoam once in awhile to keep everything working swimmingly. Dont spray the maf sensor with carb cleaner. You will ruin it