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Old Dec 30, 2007 | 01:34 PM
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Default CAI reality

Is adding a CAI really the most cost effective HP gainer for the price. Is there a modification that could be done to the stock air box?
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Old Dec 30, 2007 | 01:48 PM
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Originally Posted by redc-6
Is adding a CAI really the most cost effective HP gainer for the price. Is there a modification that could be done to the stock air box?
You can mod your stock box. Do a search, a couple of forum members did it a while back. As far as bang for the buck I don't think you will notice the increase in hp with a CAI, vararam claims a 0.1 sec increase in the quarter. I use an LPE CAI and picked up 12 rwhp on the dyno, I think they run about 300 bucks for this setup. I suggest you sit down and try to figure out what you want to accomplish with the car before you mod. In my case I like to optimize the intake and exhaust so I went with a ported intake manifold and throttle body, CAI, and headers. After I installed everything I had the car tuned. I was pleased with the results getting 400 rwhp and 393 rwtq. Since I did the installs myself the whole thing ran about 2500 bucks including the tune which I paid for. To answer your question I think headers is the best bang for the buck, if you are going to just do bolt ons.
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Old Dec 30, 2007 | 03:01 PM
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Originally Posted by redc-6
Is adding a CAI really the most cost effective HP gainer for the price.
Probably yes
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Old Dec 30, 2007 | 04:02 PM
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I thinks so, although you need to do a couple of other things in combination, for it really to be solid.
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Old Dec 30, 2007 | 04:24 PM
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I've been doing a lot of research on this(not much else I can do as my vette doesn't come until late Feb.) and if you've got an 07 a vette-air setup with a K&N filter may be a great cost effective CAI option.

I'm hoping that K&N will be making drop in filters for the 08's.
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Old Dec 31, 2007 | 07:52 AM
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Originally Posted by redc-6
Is adding a CAI really the most cost effective HP gainer for the price.
no, imo, a proper tune is the best bang for the buck
Originally Posted by redc-6
Is there a modification that could be done to the stock air box?
yes, provided it's not an '08 (the '08 uses the z06 style air ducting/filter).

depending upon how much you want to do, here's a list of some basic airbox mods.

1. remove the rain guard (the plastic piece that covers both filters)

2. cut off the tops of the filter boxes.

CAUTION either one of the above two can lead to engine failure. the rain guard prevents the air boxes from filling up with water. if the rain guard is removed water can and will pass through the filters and collect in the boxes, just waiting to be sucked up into the engine.

3. remove the air box tops. move the left box to the right side and the right box the the left side. turn the box upside down, so the filter is facing the ground. insert the filter box into the duct/airbridge (upside down). outline the airboxes. remove the boxes and cut the shroud, following the outline. reinstall the airboxes (left on right side, right on left side, filters facing the ground through the holes in the shroud). seal the opening.

this works well, but requires aftermarket filters (the paper ones won't last long) and is a pita to check/change the filters.
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Old Dec 31, 2007 | 09:05 AM
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Originally Posted by GotVett?
I thinks so, although you need to do a couple of other things in combination, for it really to be solid.


Mostly the exhaust, headers to the tailpipe preferred. If you beef up one end you should balance the other so they work together.

Rule of thumb: What goes in must come out!
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Old Dec 31, 2007 | 11:15 AM
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Originally Posted by Zig
no, imo, a proper tune is the best bang for the buck


yes, provided it's not an '08 (the '08 uses the z06 style air ducting/filter).

depending upon how much you want to do, here's a list of some basic airbox mods.

1. remove the rain guard (the plastic piece that covers both filters)

2. cut off the tops of the filter boxes.

CAUTION either one of the above two can lead to engine failure. the rain guard prevents the air boxes from filling up with water. if the rain guard is removed water can and will pass through the filters and collect in the boxes, just waiting to be sucked up into the engine.

3. remove the air box tops. move the left box to the right side and the right box the the left side. turn the box upside down, so the filter is facing the ground. insert the filter box into the duct/airbridge (upside down). outline the airboxes. remove the boxes and cut the shroud, following the outline. reinstall the airboxes (left on right side, right on left side, filters facing the ground through the holes in the shroud). seal the opening.

this works well, but requires aftermarket filters (the paper ones won't last long) and is a pita to check/change the filters.
I have an '07. So, I did step one only. Think this is about a good as an after market unit, and at 0 cost. There are many claims about gains on CAI units, and just as many that contend they are bogus. If you don't change the exhaust/mufflers some, it won't make any difference anyway, so that needs to be added to the cost. Many buy the CAI for the looks anyway. I have the GM touring exhaust which is less restrictive. I'm happy with this combination.
Not sure how something like the K&N would do as compared to option 1 above. The twin snout K&N in chrome really does look good.
I have not driven in the rain, so I can't say.
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Old Dec 31, 2007 | 01:53 PM
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My home-made mod. Cost 10 bucks. Don't laugh.

Get a black rectangular office type plastic trash can (5 bucks at Lowes). Cut it in half so you have about 10 inches of the the bottom part, then cut that piece in half so that you have a scoop. (it is rounded where the bottom of the can meets the sides). You will now have a 15inch wide scoop to mount underneath the radiator.

Get 2 long bolts and 2 pieces of pvc to use as spacers to force a gap in the bottom of the shroud. The 2 bolts also hold on the homemade air scoop. This forces fresh air up to the airbox.

To isolate the airboxes from the engine compartment, I cut one of those silver windshield reflectors to fit in the airbox area and attached with velcro. I tie-wrapped some of the remaining reflector around the MAF to throttle body duct. Seems to help.
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Old Dec 31, 2007 | 02:04 PM
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Default CAI Reality

K&N is not a cold air system, it is a hot air system, it takes in hot engine compartment air.
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