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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 01-12-2014, 03:54 PM   #176
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I have not heard that before. I wonder what the source is.
It's the air trapped in the tube escaping out the filter once the tb is closed I believe.
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Old 01-12-2014, 06:50 PM   #177
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I have that too. It also became more pronounced with the Ported TB.

ADM Race Intake with a Vmax TB on an LS3.

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Old 01-12-2014, 09:27 PM   #178
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Originally Posted by rontammy0 View Post
It's the air trapped in the tube escaping out the filter once the tb is closed I believe.
Hmmm. I'm trying to understand the physics here, and can't wrap my analytical brain around it.

Until you get to the intake valves themselves, nothing in the intake is sealed to any degree that would hold pressure or trap air. The air box is open to outside air. The air filter media allows air to freely pass through. The throttle body plate does not seal when closed--particularly the ported TB, which has more gap around the plate edge than the stock TB, thanks to the porting process.

I'm not saying it doesn't happen, I just don't get why it does.

I wonder instead if it's some fuel pressure bleed off that's occurring, and echoing back out the more open intake.
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Old 01-12-2014, 10:02 PM   #179
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Originally Posted by 911medic View Post
Hmmm. I'm trying to understand the physics here, and can't wrap my analytical brain around it.

Until you get to the intake valves themselves, nothing in the intake is sealed to any degree that would hold pressure or trap air. The air box is open to outside air. The air filter media allows air to freely pass through. The throttle body plate does not seal when closed--particularly the ported TB, which has more gap around the plate edge than the stock TB, thanks to the porting process.

I'm not saying it doesn't happen, I just don't get why it does.

I wonder instead if it's some fuel pressure bleed off that's occurring, and echoing back out the more open intake.
I researched this before when I heard it myself..I didn't hear it inside the car but when my wife pulled the car into the garage one night I heard it. Maybe it's not from the tb closing but just the amount of air being pulled into the tube ..once the car is shut off that air has to go somewhere. You could be right for sure. I can't find where I read that...that why I ended with I believe. I've really no seen much posted about this..if anyone knows for sure the will educate us
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Old 01-14-2014, 07:52 AM   #180
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I contacted a few of the intake manufacturers yesterday and none of them had a solid answer to what the cause of that sound is. Just theories but none of them ever had any reason to research it in depth. In my experience it is something that occurs with any aftermarket intake system. I have noticed it on every kind of vehicle from Saturns to Silverados. I would be interested to know the answer though.
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Old 01-14-2014, 11:44 AM   #181
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Originally Posted by Apex Chase View Post
I contacted a few of the intake manufacturers yesterday and none of them had a solid answer to what the cause of that sound is. Just theories but none of them ever had any reason to research it in depth. In my experience it is something that occurs with any aftermarket intake system. I have noticed it on every kind of vehicle from Saturns to Silverados. I would be interested to know the answer though.

The fact that u have one air mass is actively being pulled into the intake
and another air mass surrounding it will cause a pressure differential.

This is in fact what allows aircraft to fly:
If you have faster moving air on top of the wing and slower moving air under the wing.
The faster moving air is at a lower pressure than the slower air under the wing, which is at a higher pressure producing lift.
Its called the Bernoulli effect.

I am certain the pressure inside the intake and air box is lower than the air surronding it outside the car and inside the engine bay.

I can see the higher pressure air rushing to the lower pressure air mass creating this sound.
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Old 01-14-2014, 08:49 PM   #182
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While I get your meaning, I don't think it applies here. Air at atmospheric pressure is rushing into the vacuum created by the intake continuously while the motor runs. This produces, in part, the intake noise we hear, and which is more pronounced with a cold air intake.

However, as soon as the engine vacuum is turned off, the intake returns to atmospheric pressure immediately. There is no sealed area that has to bleed off over the course of a few seconds, and as such this return to atmospheric pressure is virtually instantaneous, and should not generate a noise that persists after the engine is turned off.

While I have had college level physics courses (including learning about Bernoulli's principle), I am not a physicist, and certainly could be wrong. But if air pressure or vacuum bleed off is the source of this sound, I have to think it's produced by something other than the air box, intake tube, or intake manifold.
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Old 01-14-2014, 08:59 PM   #183
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Crank case pressure bleeding off into the clean side tube that attached to the intake elbow... Normally unnoticeable with the stock intake installed.
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Old 01-15-2014, 06:19 AM   #184
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Hmmm. That sounds like a possibility.
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Old 01-15-2014, 10:23 AM   #185
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Quote:
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Crank case pressure bleeding off into the clean side tube that attached to the intake elbow... Normally unnoticeable with the stock intake installed.
Sounds like a reasonable possibility.
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Old 01-20-2014, 09:53 PM   #186
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Halltech FTW...

Not many talk about it, but it is top rated and a very nice look.
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Old 01-23-2014, 02:15 PM   #187
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Halltech FTW...

Not many talk about it, but it is top rated and a very nice look.
I do not have any personal experience with the Halltech intakes but they have a great reputation and people who's opinion I respect speak highly of their systems.
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Old 01-31-2014, 02:35 PM   #188
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So I was looking at the Vararam intakes. You said one bad thing about it was that it set the radiator at an incline but the way this guy installed his it fit right back where it was "or so it seemed". I was looking at getting the vararam intake for my v6. Just thought i would ask for your thoughts on this.
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Old 02-21-2014, 07:17 AM   #189
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So I was looking at the Vararam intakes. You said one bad thing about it was that it set the radiator at an incline but the way this guy installed his it fit right back where it was "or so it seemed". I was looking at getting the vararam intake for my v6. Just thought i would ask for your thoughts on this.
The V6 and SS system are different. The radiator is not leaned back as much on the V6 as the SS. Is it that big of a deal? 99% of the time, probably not but it is not ideal. I am not a big fan of it but the Vararam intakes do produce solid gains. We would not carry them if they were not good intakes.
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Old 02-28-2014, 09:55 AM   #190
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Revolutionary new development!
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Old 03-02-2014, 12:31 PM   #191
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Bump for TMT.
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Old 03-02-2014, 01:45 PM   #192
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Great work Chase! STICKY THIS!!

i installed a K&N CAI system and noticed while i had better all around performance and dyno results to back it up that i could get more from what i was getting out of it. I have higher at idle IAT temps and now i know what its from and what i can do to fix it...cant wait to get to my storage garage and look at my MAF sensor too!!

just out of curisoty can any tech out there in the performance world tell me what a normal at idle is for a CAI system....i know they very from system to system but what is the high limit tolerances....what is too high for an at idle temp?

thanks Chase!!
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Old 03-02-2014, 02:02 PM   #193
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Does the CAI intake use an oiled filter? If yes, does it come with the oil?
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Old 03-02-2014, 02:04 PM   #194
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good news is my MAF sensor is not the weak one LOL
Bad news is i need to change my system for my preferences!
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Old 03-02-2014, 06:34 PM   #195
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Does the CAI intake use an oiled filter? If yes, does it come with the oil?
Yes and yes.

Quote:
Originally Posted by 1KillerSS View Post
Attachment 604878

Attachment 604879

Attachment 604880

Attachment 604881

good news is my MAF sensor is not the weak one LOL
Bad news is i need to change my system for my preferences!
Those gaps are exactly what you do not want. That is one of the big advantages of the CAI Inc systems. It has a sealed air box like the stock intake so you do not have to worry about hot air from the engine bay getting in.
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Old 03-02-2014, 09:13 PM   #196
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How do you like my new race scoop for my CAI intake?

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Old 03-02-2014, 09:27 PM   #197
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Not bad Rex... LOL
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Old 03-03-2014, 08:20 AM   #198
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How do you like my new race scoop for my CAI intake?

That thing is rowdy!
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Old 03-05-2014, 11:41 AM   #199
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Since this is a "general" air intake thread here are my personal findings:
Tested the Rotofab(simular to the Camaro but the camaro needs the bottle relocation were the G8 doesnt): other mods-Ported TB




Tested the Spectre(very simular to the Camaro intake): Other mods- 1 3/4 LTs/Ported TB/tune

Roto-Fab Camaro Intake system does NOT require our windshield washer relocation kit, in case there's any confusion, and bolts to existing mounting point on your vehicle.
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Old 03-05-2014, 12:00 PM   #200
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Here's a couple of pics from Roto-Fab!






Whether you have an N/A or supercharged, we have what you need!
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