I had been meaning to do this project for a while (almost a year since I picked up the hose).
The stuff that I am using is from a hose suppy and I think it is meant for sewage pumping. This stuff is awsome you can bend it 180 degrees and it wont crumply any of the tube in a zero turning radius. It was $5/foot and I used a little less than 3 feet.

Because the diameter is so great it was a very difficult running it as you can imagine. the hole is located in the same area as the aftermarket CAI's, which is to the right of the batt. I needed to modify the battery tray removing a semicircular section (this was not easy the steel is very heavy duty on the batt. tray) also there is a wiring harness that I moved furthur into the fender wall by removing a small section of steel to join two existing holes in the inner fender. It was also further complicated b/c I have the largest batt. that our vehicle can hold.

I have seen the P.R. cai and didnt like that the filter is still located so high up in the fender and that there is the large piece of trim plastic all the way on the bottom that should be trimmed back. I saw Jibaro's car and he has the P.R. CAI.

I ran the hose all the way to the bottom and added a piece of window screen to keep out the large particles and I trimmed back the plastic trim at the bottom. I am using the stock air box with the K&n panel filter. The hose runs up to the stock air box. I also removed the muffler after the MAFS and the breather. I just ordered the breather and hood shocks from carparts.com (with the free shipping discouint) So right now I have a ghetto setup for the breather filter, but thats not a big deal.

Next thing to add is a little by-pass valve incase I hit a monstorous puddle (or lake) and also during anticipated rainny weather I can just push the tube furthur up.
But I have to say DAMN!! because this mod defintily worked. Better and faster acceleration and increased low end power. I don't have a dig. camera but I'll find someone that does if anyone is interested in pics.

total cost 15 for hose and 50 for filter not bad I gotta say, especially when your an unemployed student haha!!

 

wow, 4.5"?? thats insane man! i'd love to see some pics.

 

I hope the piping your using can withstand heat unlike regular PVC plumbing pipes. Also, if possible.. try to dyno your car and see what results you get. Personally, I am sort of against home-made CAI's.. only because some people use the wrong material and it causes problems to the engine. If done right.. then you can achieve great results. I have a PR CAI and I am more than happy with it. One of my favorite mods under $200.

 

hey i just received my pr cold air intake for my 92 max se..but the thing im worried about is heavy rain or hititng a puddle...in the instructions i noticed inm little letters "meant for dry racing only because it may damage engine" and thought to myself hwio great. any way i can stop water from going in?

 

You can install an AEM Bypass valve to your PR CAI to help stop water. If you keep your mudguards on and don't drive in huge amounts of puddles then I think you should be fine. You need to suck in alot of water for it to damage your engine. The only reason it says "Meant for dry racing...blah blah" is so the Company doesn't get sued by you incase something happens to your engine. Otherwise some people could try to suck in water on purpose and damage their engine just so they can sue the Company. I've had my PR CAI for 2 years now and haven't had any problems.

 

On friday I got my car inspected, in ny they put the car on a dyno, I should have got it done then b/c the place I go to is always very busy. I have never dyno'ed my car but I asked the owner a while ago and he said I think around $30.
Since everyone latley has been posting their 1/4, I had been planning to go to the track in the hamptons, I have a school friend that goes with his mustang every friday for 'test and tune'. He said for like $40 you can run as many times as you want. I had been waiting on the track until I did my tranny upgrades which I completed a couple weeks back: tranny cooler, syn ATF, transgo vb kit, new filters. But I will definitly be planning on hitting the track for some fun. I wanna install a switch to run the radiator fan inbetween runs so I dont overheat my sh!!t.

 

I'm gonna have to side with Nevin on this one... the materials being used in the homemade CAI's could be devastating like the PVC pipe example...you never know what chemicals are in these materials as the "pipe" gets hot the engine can ingest these chemicals...

speaking of ingesting i wouldn't recommend the AEM bypass valve right now either...they had a recall at one point as the valve was disinigrating (sp?) and being ingested by the motor...just stay out of standing water and you'll be fine

 

I didn't realize AEM had a recall on their bypass valves. IMO, I think the bypass valve just loses you power and the material isn't affective. I installed one on my friend's PR CAI and we noticed a slight decrease in performance with the AEM bypass valve.

 

i am looking it up right now to see if the claim is valid...i read it on a honda forum and my cousin had one to install on his SI and he didn't put it on becuase of the recall......


.......still looking

......ok found it...

http://www.aempower.com/vol_rep.htm

made between aug 2k and jan 31 2k1...id still be a little hesitant on the new ones too but that's just me..

 

there's this guy with an integra at the track, and he's got a home made CAI out of PVC, i told him how i had heard that it was bad for his engine and he told me i was full of it. I didn't know enough to argue so i said "okie dokie smokey". anyway, 40 bucks is CRAZY for test and tune, i think the 12 i pay is alot!!!!!!

 

hahahahaha... I remember that. That guy must have and a 4.5" CAI pipe. It was HUGE! He will figure out the PVC pipe is bad after his motor gives out. His motor was ticking pretty bad already! lol. I agree $40 is alot of money for Test & Tune. I pay $22 for Test & Tune at the local track. $12 is cheap so I wouldn't complain too much.. lol

 

that track's surface is so bunk too! i think i could get into the 14's at salem. i'm gonna try when i get back from NY.

 

a few of you guys are saying that homemade CAIs arent a great idea because of the materials. (/start/stupid question) if i were to make a CAI out of the stock piping, that wouldnt hurt my engine would it? i have all the pipes and stuff from my BMW and i plan on taking apart my new maxima's (92 SE)intake and making a CAI out of whatever i have (stock piping for bmw and maxima+K&N cone which i already have).(/end/stupid question)
-PaT-
'86 bmw 325 2 door 5 speed
'92 maxima SE 5 speed (picking it up thursday)
first mods: homemade CAI, VTC rewire, install stereo.

 

no you should be fine...i think we are talking about materials that aren't made specifically for this type of application (at least i am)...

 

I believe that this is the very reason why most of us choose to buy professionally made parts from trusted companies. We know that they have a reputation for dependability and excellence. They would not make something for us and it not work, because with the # of Maxima owners on this forum would kill their reputation. If they f'ed up one of our cars, then they wouldn't make any money off the rest of us.

 

I dont know about that.I heard that the smaller the tubing the better because of forced air.Thats why I thought WSP was trying out a 2.5...4.5 seems a little too much you can only get so much air into the motor without a turbo/SC

 

Okay so I can see the concerns about the materials being used. Fortunitly I'm not using PVC and I can see the problem of the vinyl chloride outgassing at high temp. (I almost have my degree in Engineering Chemistry and will go for a masters in Material Science Engineering). The only problem I can see is the material eventually dry rotting, but rememmber that the hose is before the stock air box with the K&N. Also the hose wont be get quite as hot because its not in contact with the intake plenum.



Remmember that the PR CAI comes with a few sections of rubber and over time (It may be something like 10yrs) but eventually the rubber will get harder and more brittle. What I am using is a steel reinforced rubber.



This mod definitly worked very well, and I'm enjoying it. I have to mod it a little more to make the connection to the airbox even a little less restrictive

 

oh god, that's alot of remembering!

 

Tests have shown that air travels faster in smaller piping. The only need for bigger piping is when the air flow is too great for the size piping and there is a "backflow" effect. That is why you see most aftermarket intake piping no larger than 3.5".