Review of Injen CAI

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Jul 29, 2003 | 07:51 PM
  #41  
I just installed an injen in a friend's 99 maxima.

The directions were horrible.
The fitment was ok, but not great. The hanger for the lower section of pipe didn't fit to well at the correct angle. The lower pipe was too close to the battery ( < 1 inch).

The directions were so jumbled, we couldn't figure out where a vacuum tube went.

In the following picture...you see the large red vacuum tube. On the left side of the red tube, directly above the clamp is a small black vacuum tube. Where does this connect to? I pulled this pic off of cardomain (apparently that dude didn't even attach the hanger of his intake . In the directions, this tube was simply sitting there unattached and on top of the MAF sensor. Can anyone post pics of their setup?



The car actually growls now. I didn't expect that, nor have heard any other car sound this way. It's like a garbled growl. Are people experiencing this also?
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Jul 30, 2003 | 05:46 AM
  #42  
Quote:
Originally posted by 2DaMax As for me, I'm staying all stock...its the best set up you can have. The stock air box totally isolates the filter from the very hot engine temperatures. Additionally, open air intakes really don't show its effectiveness up until the high RPM ranges and our VQ motor performs at its best in the lower to mid RPM ranges. So why spend all that money on open air intake systems when there's really no performance/hp gains that are truly useable. Who would have thought that a large number of Maxima enthusiasts would be driving their family sedans above the 100 mph mark or be trying to hit the local drag strip boasting NOS or S/C systems. It takes more than just bolting on an aftermarket intake alone to see a real performance increase out of these engines. It'll take way more money and time to accomplish that. I'm just a little different from most people who like the open air intake setups for the sound of it. What's the point in trying to mimic a sound of a true high performance machine when you don't have the HP to back it up, its like a small mutt with all barks but no bite. [/B]
It's funny that you would say there are no gains by adding a less restrictive intake to the our cars will give no gains. I just posted dynos of DMB's before and after runs. Please keep researching because you are wrong. I ran my car stock for a long time and ran fast times at the track with the stock setup. My car is faster with the intake and there's no doubt about it.

Dave B and Street Reeper's testing only told us the effects of what happened with their cars, so I wouldn't say that's enough proof for everyone to go out and get rid of their intakes.
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Jul 30, 2003 | 06:50 AM
  #43  
Quote:
Originally posted by UnderWhere

In the following picture...you see the large red vacuum tube. On the left side of the red tube, directly above the clamp is a small black vacuum tube. Where does this connect to? I pulled this pic off of cardomain (apparently that dude didn't even attach the hanger of his intake . In the directions, this tube was simply sitting there unattached and on top of the MAF sensor. Can anyone post pics of their setup?
The bracket on the lower pipe needs to be bolted to your engine. That will swing the intake under the battery tray, further away from the front of your radiator. You can play with the couplings and even bend that bracket slightly to place the filter in a better spot.

The tube your refering to goes nowhere. It's a vent for your transmissions and only needs to be someplace so it can breath.



Quote:
The car actually growls now. I didn't expect that, nor have heard any other car sound this way. It's like a garbled growl. Are people experiencing this also?
The growl from the Injen is pretty wild, sounds like a V8!
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Jul 30, 2003 | 09:28 AM
  #44  
do you have a CAI or a mid pipe?


Quote:
Originally posted by deezo
It's funny that you would say there are no gains by adding a less restrictive intake to the our cars will give no gains. I just posted dynos of DMB's before and after runs. Please keep researching because you are wrong. I ran my car stock for a long time and ran fast times at the track with the stock setup. My car is faster with the intake and there's no doubt about it.

Dave B and Street Reeper's testing only told us the effects of what happened with their cars, so I wouldn't say that's enough proof for everyone to go out and get rid of their intakes.
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Jul 30, 2003 | 11:44 AM
  #45  
Quote:
Originally posted by 2DaMax
Read this thread which discussed the fact that open air intake systems do not really provide hp gains...it's been track proven by Dave B and Street Reeper. Street Reeper went to two different drag strips, 1/8 and 1/4 mile. Avg. times with stock resonator were .12 faster than the mid-pipe in the 1/8 mile. Avg. times with stock resonator were .18 better in the 1/4 mile. As a matter of fact, the midpipe which is incorporated in these open air intake kits made the car run slower because it doesn't have an air buffering characteristic that the stock intake resonators provide. That growl sound you get when you mash on the accelerator is actually coming from the midpipe. You can remove the midpipe and replace it with the stock intake resonator but the sound of the Injen intake that seems to get everyone all excited will go away. Everyone else with open air intakes took out their midpipe and put the stock resonators back in and got back some low end. I know the thread focused more on the midpipe but when you get the Injen or other full intake kits, they will come with the same type of midpipe.

Actually that was not me, it was two other members who posted their track exprience and found that the midpipe made them slower. I have started a new thread here, read the two links about what the resonator does in the original post.

http://forums.maxima.org/showthread....11#post2222511

I liked the sound of my midpipe but think that it might actually be a result of poor resonance for an intake with this engine. Stillen/JWT poor over dyno's to develop a product, I always wondered why they kept the resonator since it is such a simple idea to add a midpipe for flow, that was before I looked at the links posted in that thread. I have a feeling that they dyno test and develop their products more than most aftermarket companies.

If anyone has any dyno's (or even any track exprience) comparing open air intakes with a resonator and with a midpipe I am interested in seeing them.

One of the aftermarket manufactures of midpipes said that dyno tests from this sight prove that the midpipe design is better with an open filter than is the resinator. I have PM'd the people who reportedly had these and posted this intake thread in the general maxima discussion forum, I still have yet to see those dyno's, if anyone has them or has seen them please let me know.

I am also interested in any dyno's comparing the Injen and PRCAI to the Stillen/JWT as these intakes do not have the resinator either.

Side note, the latest thing that I have changed besides putting the resinator back on is to use blue ice (those things you freeze and put in coolers to keep the cooler cold) and put some of these inline with the incoming air that feeds the JWT filter and velocity stack (see picture below and look under the car) to blow cooler air on the filter, I hate Oklahoma heat.

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Jul 30, 2003 | 09:20 PM
  #46  
Quote:
Originally posted by njmaxseltd


The bracket on the lower pipe needs to be bolted to your engine. That will swing the intake under the battery tray, further away from the front of your radiator. You can play with the couplings and even bend that bracket slightly to place the filter in a better spot.

The tube your refering to goes nowhere. It's a vent for your transmissions and only needs to be someplace so it can breath.

The growl from the Injen is pretty wild, sounds like a V8!

Thanks for your help. Yeah, i took the pic off of a cardomain page. I did attach the bracket. Thanks for confirming that the hose didn't go anywhere.
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Jul 30, 2003 | 09:23 PM
  #47  
Those ice pack will get warm or hot right?


Quote:
Originally posted by Street Reeper

Side note, the latest thing that I have changed besides putting the resinator back on is to use blue ice (those things you freeze and put in coolers to keep the cooler cold) and put some of these inline with the incoming air that feeds the JWT filter and velocity stack (see picture below and look under the car) to blow cooler air on the filter, I hate Oklahoma heat.

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Jul 31, 2003 | 05:51 AM
  #48  
Quote:
Originally posted by joew
do you have a CAI or a mid pipe?


I have a midpipe. CAI's have no top end at all.
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Jul 31, 2003 | 09:38 PM
  #49  
top end to you is 5-7rpm?

do you feel the lost of power on ~4rpm?



Quote:
Originally posted by deezo
I have a midpipe. CAI's have no top end at all.
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Aug 3, 2003 | 04:15 PM
  #50  
i love mine its sounds mean anytime anyday i scare people with mine. there is a place on saterday where we race and i here "hey what do you got turbo" i look at them and injen cai the only way to go
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Aug 3, 2003 | 04:37 PM
  #51  
Injen Intake will Touch the Transmision cable... if you don't remove the tank that is underneath the battery.... That has to get removed... then try to readjust the intake and play around with the screws.... I like the Injen intake because it sounds really good. and I do feel a slight difference. but nothing major. may be around 7 more HP... I Installed my Y-pipe couple days ago. And Now I see big Difference. Around 3500 RPM the car jumps and takes off a lot quicker... Before installing the Intake, Remove the negative terminal from the Battery....
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Aug 4, 2003 | 02:34 AM
  #52  
i really need a y-pipe
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