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Old 02-28-2007, 10:41 AM   #1 (permalink)
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Cool Grand VItara Stock Air Intake Breather Tube

As a newbie to this forum, I have learned quite a bit about my 2006
4WD Grand VItara. I love this car and the small nuisance doesn't detract from my overall positive opinion of the Grand Vitara.

As I posted previously, after installing a new K&N filter, the stock motor seem to rev little more smoothly to the top RPM. Previously, the motor rev'd and then spiked as it came on the cam on the higher RPM. I do believe the K&N does help it breath more efficiently. I have used K&N's in all my previous vehicles and my motorcycles and never had any problems.

Now, I have a question for this forum. I noticed that the air intake breather tube bends upwards, after couple of 90's, to the ledge of the hood. No problem so far but I also notice that there is a weather stripping blocking any air to the intake and I also notice that the bottom of the hood incorporates a molded type of insulation that effectively appears to "close off" the intake when the hood is closed.

Now, I realize that regardless of weather stripping and the molded hood insulation, the system will never be air tight but my question is will it not restrict the aire intake to a certain degree as to affect performance and gas mileage?

I am asking this as I used to own a Lexus LS400 that ran perfectly but one day lost great deal of power while the gas mileage also dropped to approximately 10MPG. I took it to a Lexus Mechanic, that's another story, and he quickly fixed it on the spot and charged me nothing. It turned out that a piece of hood insulation had come loose and was blocking the air intake. Lexus air intake breather system was similar although when you closed the hood, you can visually see an open path from the grill area straight to the intake boot- sort of ram air.

Am I on the wrong path?
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Old 02-28-2007, 12:10 PM   #2 (permalink)
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I wondered this also. It seems kind of odd that the striping is right in front of it to potentially block it. I think its mainly to protect against water from coming in through the front.

There is a how-to on making a custom intake for the GV over at
************* : First and Foremost Exclusive Complete Resource Community Site for the 2006+ Grand Vitara
This may be a valuable solution for those looking to get a little moreair into the system.
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Old 02-28-2007, 07:05 PM   #3 (permalink)
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Quote:
Originally Posted by Metatrox
I wondered this also. It seems kind of odd that the striping is right in front of it to potentially block it. I think its mainly to protect against water from coming in through the front.

There is a how-to on making a custom intake for the GV over at
************* : First and Foremost Exclusive Complete Resource Community Site for the 2006+ Grand Vitara
This may be a valuable solution for those looking to get a little moreair into the system.
Did you notice any performance increase, driveability or additional fuel economy after making the mod?
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Old 02-28-2007, 11:36 PM   #4 (permalink)
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sorry unfortunately it was not mer personally. I just run the site.

click this link.
************* - Exclusive 2006 Grand Vitara Resource Site
You may have to sign up to see it though.
Ont hat link you can PM or email him and ask him about it.
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Old 03-01-2007, 12:44 AM   #5 (permalink)
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We talked about this once before in this forum, when I proposed sealing off the hood opening to stop crud from spraying back through the engine compartment. Such as when driving in traffic on a highway with sand/salt/slush spray. This is the first vehicle I've owned that has this problem.

Someone mentioned this issue, and when I checked, I could see that the air opening is mostly blocked to the front by the factory weatherstripping as you saw, and mostly gets air from the side. I added my weatherstripping and have had no problem. Haven't had it on a dyno, but it seems ok. And the engine compartment is staying a lot cleaner.

I also have to wonder about the consequences of all that crap being sucked into the intake. Presumably most of it would be stopped by the filter, where it would cause restricted airflow anyway.
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Old 03-01-2007, 03:32 AM   #6 (permalink)
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Quote:
Originally Posted by jjsorkin
after installing a new K&N filter, the stock motor seem to rev little more smoothly to the top RPM. Previously, the motor rev'd and then spiked as it came on the cam on the higher RPM. I do believe the K&N does help it breath more efficiently. I have used K&N's in all my previous vehicles and my motorcycles and never had any problems.
Don't mean to flame you jjsorkin but, aww come on, I expect more from someone that's had anything to do with bikes! You say it spiked as it came on the cam on the higher rpm, and now it doesn't? But you can't seriously say that you notice a difference between the stock air filter and the K&N on your 135kw, 1640kg 4x4 GV? And if you're talking hp, you'd be really really lucky if it gave a 0.5kw increase (but I doubt even that), and if you can honestly feel that increase in a 135kw, 1640kg 4x4 then you're a rare human being.
Couple it with a full open exhaust system and I might start listening.
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Old 03-01-2007, 04:34 AM   #7 (permalink)
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Quote:
Originally Posted by jjsorkin
I noticed that the air intake breather tube bends upwards, after couple of 90's, to the ledge of the hood.
The initial intake assembly (i.e. from the plastic 'scoop' to the airbox), including the airbox itself, is a 2 stage intake tract system. Its designed this way to allow the GV to cross water (like a creek or stream, etc) more effectively without danger of sucking it into the engine. A sign of a good 4x4

Note the initial chamber before the airbox, as well as the airbox layout itself. The design allows water to 'escape' the airflow easily, preventing a vacuum lock situation which would typically allow a complete 'gulp' of water to reach all the way to the engine. This is also why the final intake tract (to the engine) sits on top of the airbox.

The other function of the airbox's oddly designed initial intake tract is to act as a resonator to reduce engine noise.
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Old 03-01-2007, 07:29 AM   #8 (permalink)
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Quote:
Originally Posted by jst
Don't mean to flame you jjsorkin but, aww come on, I expect more from someone that's had anything to do with bikes! You say it spiked as it came on the cam on the higher rpm, and now it doesn't? But you can't seriously say that you notice a difference between the stock air filter and the K&N on your 135kw, 1640kg 4x4 GV? And if you're talking hp, you'd be really really lucky if it gave a 0.5kw increase (but I doubt even that), and if you can honestly feel that increase in a 135kw, 1640kg 4x4 then you're a rare human being.
Couple it with a full open exhaust system and I might start listening.
I agree with you that you will not feel any descernible increase in power. I simply meant that the transition to the higher RPM was smoother. Increase in air flow on the intake side alone will not offer any major increase that you can feel from your "seat of the pants".

My Ford F150 does have the K&N Cold Air Intake Kit along with a Catback Exhaust and you can definitely feel the increase in power throughout the rev range. My Suzuki V-Strom 1000 has replacement K&N and even prior to the exhaust mods, it rev'd smoother without surges with K&N. Driveability was what I was referring to. Of course, I now have Staintune exhaust and Power Commander fuel injection module which does result in horsepower and torque increase throughout the rev range.

I plan to modify, as time permits, my GV in a similar manner that I have done to all my vehicles. I think the GV has a lot of potential. Cold air Intake Kit and Exhaust are the first mods planned but aftermarket parts for the GV seem to be non existent unless I custom fabricate as posted in this forum and others.
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Old 03-02-2007, 03:44 AM   #9 (permalink)
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Quote:
Originally Posted by jjsorkin
My Suzuki V-Strom 1000 ....I now have Staintune exhaust and Power Commander fuel injection module which does result in horsepower and torque increase throughout the rev range.

I plan to modify, as time permits, my GV in a similar manner that I have done to all my vehicles. I think the GV has a lot of potential.
phew, I was worried there for a moment, but obvioulsy shouldn't have been. Good stuff, I agree 100% the GV V6 has a lot of potential - lots and lots I'm thinking, just have to find out how to unleash it without spending mega $$$.
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Old 03-02-2007, 07:54 AM   #10 (permalink)
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Quote:
Originally Posted by jst
phew, I was worried there for a moment, but obvioulsy shouldn't have been. Good stuff, I agree 100% the GV V6 has a lot of potential - lots and lots I'm thinking, just have to find out how to unleash it without spending mega $$$.
Yeah, I bought this from fobeauchamp76 this week for $200.00 with free shipping. He told me that he is going to a custom made dual exhaust system and only used this during the Summer. Probably will receive in couple of weeks as it is being shipped from Canada. Probably paid little too much but it is all stainless system with Magnaflow. I will let you know how this mod turns out.


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