4 inch CAI

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Old 11-02-2012, 05:46 PM
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Good luck in this venture. I was thinking about doing this a couple months ago but decided not to. Going to make a 3.5" and 4" to do some dyno comparisons once I get a ported manifold/or 3.7 manifold, ZDX throttle body. That way I know which will perform better.

I also was thinking of making it two piece so it could be ran as a SRI or CAI. Have you thought of this?
Old 11-02-2012, 05:51 PM
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Originally Posted by Atlas.46
Good luck in this venture. I was thinking about doing this a couple months ago but decided not to. Going to make a 3.5" and 4" to do some dyno comparisons once I get a ported manifold/or 3.7 manifold, ZDX throttle body. That way I know which will perform better.

I also was thinking of making it two piece so it could be ran as a SRI or CAI. Have you thought of this?
No, but that is a good idea. I could easily make that happen. It would probably add $20 to the price though. Atlas i'll pm you on v 6 p
Old 11-02-2012, 06:18 PM
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Originally Posted by Atlas.46
Good luck in this venture. I was thinking about doing this a couple months ago but decided not to. Going to make a 3.5" and 4" to do some dyno comparisons once I get a ported manifold/or 3.7 manifold, ZDX throttle body. That way I know which will perform better.

I also was thinking of making it two piece so it could be ran as a SRI or CAI. Have you thought of this?
i think the question is why would you want a SRI for a TL in the first place?

The reality with SRI's is they are only useful on cars where you can get the filter to the front of the car where the air temps will be better as well as incoming velocity. The position of where the air is coming in to the tubing within the engine bay is extremely important.

If you think about a stock TL even - the intake inlet is in front of the battery, - right by the front of the hood. This is ideal for getting air at a good temperature without requiring a "cold air intake" that sucks air from the bottom of the engine bay. An SRI is going to sit behind the battery which is far from ideal.

How are you gonna have an SRI in a TL which doesn't get anything but incredibly hot air, not to mention less incoming velocity due to all the turbulence of air inside an engine bay?
Old 11-02-2012, 06:21 PM
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Originally Posted by i_love_cars
i think the question is why would you want a SRI for a TL in the first place?

The reality with SRI's is they are only useful on cars where you can get the filter to the front of the car where the air temps will be better as well as incoming velocity. The position of where the air is coming in to the tubing within the engine bay is extremely important.

If you think about a stock TL even - the intake inlet is in front of the battery, - right by the front of the hood. This is ideal for getting air at a good temperature without requiring a "cold air intake" that sucks air from the bottom of the engine bay. An SRI is going to sit behind the battery which is far from ideal.

How are you gonna have an SRI in a TL which doesn't get anything but incredibly hot air, not to mention less incoming velocity due to all the turbulence of air inside an engine bay?
You can change it out if you know a very hard rain is coming.

For anyone that may be interested in just a 4in sri I can do that as well for cheap.
Old 11-02-2012, 06:36 PM
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Originally Posted by NvrDwn
You can change it out if you know a very hard rain is coming.
pshaw, people just gotta make sure they don't live in Seattle - rain problem solved
Old 11-02-2012, 06:39 PM
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Originally Posted by i_love_cars
pshaw, people just gotta make sure they don't live in Seattle - rain problem solved
Or the hurricane that dumped inches of rain!
Old 11-02-2012, 07:03 PM
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Originally Posted by NvrDwn
No, but that is a good idea. I could easily make that happen. It would probably add $20 to the price though. Atlas i'll pm you on v 6 p
Replied over there.
Old 11-02-2012, 09:33 PM
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Adam,

In the lower right hand corner of each post, the middle icon is a multi-quote button. This allows you to respond to more than one person in a single reply.

Give it a try-it makes life here on AZ much easier.
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Old 11-02-2012, 10:18 PM
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Originally Posted by i_love_cars
pshaw, people just gotta make sure they don't live in Seattle - rain problem solved
Dude, I just installed the AEM v2 yesterday, and I'm in Seattle. Dont demotivate me already
Old 11-03-2012, 01:53 AM
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Originally Posted by Atlas.46
Good luck in this venture. I was thinking about doing this a couple months ago but decided not to. Going to make a 3.5" and 4" to do some dyno comparisons once I get a ported manifold/or 3.7 manifold, ZDX throttle body. That way I know which will perform better.

I also was thinking of making it two piece so it could be ran as a SRI or CAI. Have you thought of this?
I really think 3.5" is ideal, and even then, only if you've swapped to a larger TB. When you go massively larger than the TB you may cause turbulence. I just don't see a TB that measures ~67mm on the CAI side and 64mm on the intake manifold side benefiting from a 102mm CAI.
Old 11-03-2012, 03:13 AM
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so would this work on a 2g tl???
or would u consider making an intake for the 2g side?
if u do get dyno results, i bet quite a bit of members on that side would be interested
Old 11-03-2012, 03:37 AM
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Originally Posted by anx1300c
I really think 3.5" is ideal, and even then, only if you've swapped to a larger TB. When you go massively larger than the TB you may cause turbulence. I just don't see a TB that measures ~67mm on the CAI side and 64mm on the intake manifold side benefiting from a 102mm CAI.
Well won't ~74mm from the V2 be enough for ~67mm out TB ? I think the only answer to that question will be a test from v2 to 3.5'' to 4.0''... until then we will never know for sure... I also think the engine size and the TB size will give different gains/results from the different piping size...
Old 11-03-2012, 06:13 AM
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Originally Posted by HairyMonkey019
http://www.youtube.com/watch?v=VAxZv-nbdsM

so would this work on a 2g tl???
or would u consider making an intake for the 2g side?
if u do get dyno results, i bet quite a bit of members on that side would be interested
I am working with someone this weekend about trying to get these for the 2G's!

Originally Posted by DomGSR-T
Well won't ~74mm from the V2 be enough for ~67mm out TB ? I think the only answer to that question will be a test from v2 to 3.5'' to 4.0''... until then we will never know for sure... I also think the engine size and the TB size will give different gains/results from the different piping size...
You are correct about the different engine size.

If anyone has a aem v2 and is willing to buy a 4in cai from me and will dyno before and after, message me!
Old 11-03-2012, 07:49 AM
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Originally Posted by NvrDwn
If anyone has a aem v2 and is willing to buy a 4in cai from me and will dyno before and after, message me!
that's exactly what I'm doing, lol. I have an AEM V2 currently on my car and am going to dyno before/after with your 4" intake, albeit with a bored ZDX TB.
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Old 11-03-2012, 10:09 AM
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Originally Posted by i_love_cars
that's exactly what I'm doing, lol. I have an AEM V2 currently on my car and am going to dyno before/after with your 4" intake, albeit with a bored ZDX TB.
Yes. I should have explained that I also want a stock car to see if there are gains for them over the aem v2.
Old 11-03-2012, 01:15 PM
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damn that sounds awesome HairyMonkey !!!
Old 11-03-2012, 02:25 PM
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lol, after reading this thread i looked up 4 inch intake accord on youtube
300+hp to the wheels!!!!!!

and it seems like it's all just piping!!!!
Old 11-03-2012, 02:42 PM
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Originally Posted by NvrDwn
Yes. I should have explained that I also want a stock car to see if there are gains for them over the aem v2.
Maybe you'll have to create a 3.5'' intake also? Maybe stock TB will like it more and maybe bored TB will like the 4''?!
Old 11-03-2012, 05:01 PM
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Originally Posted by HairyMonkey019
lol, after reading this thread i looked up 4 inch intake accord on youtube
300+hp to the wheels!!!!!!

and it seems like it's all just piping!!!!


i was giving you major props haha....thought that was your car....

Originally Posted by DomGSR-T
Maybe you'll have to create a 3.5'' intake also? Maybe stock TB will like it more and maybe bored TB will like the 4''?!
tell me, whats in the noodle ?
Old 11-03-2012, 05:29 PM
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even tho my default.... is a 2 g tl
Old 11-03-2012, 06:53 PM
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Originally Posted by DomGSR-T
Maybe you'll have to create a 3.5'' intake also? Maybe stock TB will like it more and maybe bored TB will like the 4''?!
I can do that easily
Old 11-03-2012, 07:28 PM
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Originally Posted by NvrDwn
I can do that easily

I think youll gain some more interest and buyers if you offer 3.5" and 4" . 3.5" for the people that have all the bolt ons and dont want to upgrade the IM and TB or the people that are completely stock and just want a little extra .
Old 11-03-2012, 07:32 PM
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Originally Posted by BlitzBlackGSXR
I think youll gain some more interest and buyers if you offer 3.5" and 4" . 3.5" for the people that have all the bolt ons and dont want to upgrade the IM and TB or the people that are completely stock and just want a little extra .
3.5 intake size is now available then!

Again I'd like to state if anyone is interested in potentially buying these let me know so I can add your name to the list.
Old 11-03-2012, 08:03 PM
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Hhmmm id potentially be interested in a 3.5" . Would the mounting point be in the same location as all the other CAI locations . I'd be interested in just the pipe with the breather fitting And No filter as I would re use my DC Sports filter.
Old 11-03-2012, 08:10 PM
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Originally Posted by BlitzBlackGSXR
Hhmmm id potentially be interested in a 3.5" . Would the mounting point be in the same location as all the other CAI locations . I'd be interested in just the pipe with the breather fitting And No filter as I would re use my DC Sports filter.
Hmm you've made a good point here. With the 4in it is tight enough that it requires no mounting brackets. I may purchase a 3.5 intake and give it a try myself and find out if it needs a bracket.

I haven't checked pricing for it but I'd guess the price would be around 90 + shipping I guess.
Old 11-03-2012, 08:17 PM
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Will the fitting have a problem with TL with foglights?
Old 11-03-2012, 08:20 PM
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Originally Posted by turtlecivic
Will the fitting have a problem with TL with foglights?
I didn't know about this problem until a few days ago. I wish I had a tl to test fit. I will know if it's a problem in up to 3 weeks. If anyone could post a picture of how the filter rubs against the wires that would definitely help.
Old 11-03-2012, 09:09 PM
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Also with the mounting bracket in the fender well , when using it it sometime pushes out on the bumper when the filter is installed . I think that is due to the bend radious not being correct or tight enough. Ive seen a few pictures where the front side of the filter rubs on the back side of the fog lights . Maybe if the filter was angled down a bit so it clears the fog lights this wouldnt happen . Just a thought tho .
Old 11-03-2012, 09:15 PM
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Originally Posted by BlitzBlackGSXR
Also with the mounting bracket in the fender well , when using it it sometime pushes out on the bumper when the filter is installed . I think that is due to the bend radious not being correct or tight enough. Ive seen a few pictures where the front side of the filter rubs on the back side of the fog lights . Maybe if the filter was angled down a bit so it clears the fog lights this wouldnt happen . Just a thought tho .
Angles and how much to cut off the pipe is the key to making these work. If you cut wrong you have to buy a new pipe. If you guess the angle wrong you probably have to buy a new pipe and possibly even other pieces. This is especially important to the 4 inch intake. That is why I will have to test fit them on my own car.
Old 11-03-2012, 09:15 PM
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Originally Posted by BlitzBlackGSXR
Also with the mounting bracket in the fender well , when using it it sometime pushes out on the bumper when the filter is installed . I think that is due to the bend radious not being correct or tight enough. Ive seen a few pictures where the front side of the filter rubs on the back side of the fog lights . Maybe if the filter was angled down a bit so it clears the fog lights this wouldnt happen . Just a thought tho .
Yeah, I had this problem with the DC Sport CAI... maybe a thinner air filter might solve this problem.
Old 11-03-2012, 09:19 PM
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Originally Posted by turtlecivic
Yeah, I had this problem with the DC Sport CAI... maybe a thinner air filter mitigate ht solve this problem.
Both or only one of the two? If there is a problem with it hitting the wires I believe I can fix that but it would increase price because it would require more material.
Old 11-03-2012, 09:22 PM
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Originally Posted by turtlecivic
Yeah, I had this problem with the DC Sport CAI... maybe a thinner air filter might solve this problem.
Yea , same here . I didnt use the mount at all . I used some foam and wrapped the entire opening where the pipe goes and its been fine .
Old 11-03-2012, 11:25 PM
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Hmmm...if P2R is running a 4" intake, maybe that is a better option than a 3.5. They're definitely one of the more knowledgeable authorities on the J series. I'm sure they tried all the possible options on their Accord. Notice the way it's tapered though. That may be crucial to inhibiting any turbulence.

IIRC, that car has stock cams but some mild head work and is tuned on the AEM FIC.
Old 11-03-2012, 11:48 PM
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^ True, but at the same time, he didn't have the larger 3.7 TB. I feel that the silicone reducers do a decent job at 'scavenging down' to the TB size. Probably not as good as an actual reducer would do though.

That Accord was tuned on the AEM EMS. I've heard it had a milled head for higher compression and headwork, but I've also heard it was on stock heads. I'd believe it had stock heads at this point seeing some of the recent dyno numbers. Especially since he was tuned on EMS.

With that said, good luck Adam. Seems like you have a good thing going here, especially with all the talk of the larger intake manifolds & throttle bodies
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Old 11-04-2012, 12:43 AM
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if u read the video info:
Stock J32A2 Engine
P2R 4 Inch Intake
P2R Throttle Body Spacer and Thermal TB Gaskets
P2R Bored Throttle Body
P2R Ported Intake Manifold
P2R Thermal Intake Manifold Gasket
P2R Ported Runners
P2R Custom Header
P2R Custom 3 inch Exhaust
Old 11-04-2012, 01:48 AM
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^ Right, but there was some hearsay as to what was done to that car. I'd certainly believe it was on stock heads and a good tune.
Old 11-05-2012, 07:10 AM
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Updated list.


1. I_love_cars YES
2. Justnspace YES
3. Paperboy42190 maybe
4. The fenda rolla maybe
5. BlitzBlack GSXR maybe
Old 11-05-2012, 07:35 AM
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Originally Posted by anx1300c
http://www.youtube.com/watch?v=VAxZv-nbdsM

Hmmm...if P2R is running a 4" intake, maybe that is a better option than a 3.5. They're definitely one of the more knowledgeable authorities on the J series. I'm sure they tried all the possible options on their Accord. Notice the way it's tapered though. That may be crucial to inhibiting any turbulence.

IIRC, that car has stock cams but some mild head work and is tuned on the AEM FIC.
That engine had no head work done to it.
Old 11-05-2012, 09:41 AM
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I'd be interested to see a different dyno chart that focuses especially on low end torque. I would think there would be a dip comparred to smaller intakes or even a modified stock airbox in that area.
Old 11-05-2012, 10:42 AM
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Originally Posted by D Loke
I'd be interested to see a different dyno chart that focuses especially on low end torque. I would think there would be a dip comparred to smaller intakes or even a modified stock airbox in that area.
I'll have another one on the dyno. It'll be on a car that is nowhere near stock however. I know modified J30A5's are starving for air, I'm sure your 3.2/3.5's are as well. I can make 3/3.5/4 inch intakes.

I hope to have a dyno within this month, but i really don't know when to expect it.
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