Air intake mod
Thread Starter
Racer
Joined: Sep 2007
Posts: 379
Likes: 2
From: Johns Creek Georgia
Air intake mod
I have an '05 C6 A4, 23k miles with Corsa catbacks and am considering a dyno tune. I've checked this forum extensively and realize I do not need the few extra hp available from CAI. I'm interested in the flow - would a simple K&N type intake be an improvement (or not) in which case I'd do the mod before tuning. Does anybody know what the extra plastic shield laying on top of the intake box is for? Is it safe to remove it.
BTW, perfectly happy with Corsa catbacks recently installed. Absolutely no drone but lots of powerful sound on startup, idle and accel.
BTW, perfectly happy with Corsa catbacks recently installed. Absolutely no drone but lots of powerful sound on startup, idle and accel.
Burning Brakes
Joined: Aug 2008
Posts: 802
Likes: 6
From: Oro Valley AZ
I have an '05 C6 A4, 23k miles with Corsa catbacks and am considering a dyno tune. I've checked this forum extensively and realize I do not need the few extra hp available from CAI. I'm interested in the flow - would a simple K&N type intake be an improvement (or not) in which case I'd do the mod before tuning. Does anybody know what the extra plastic shield laying on top of the intake box is for? Is it safe to remove it.
BTW, perfectly happy with Corsa catbacks recently installed. Absolutely no drone but lots of powerful sound on startup, idle and accel.
BTW, perfectly happy with Corsa catbacks recently installed. Absolutely no drone but lots of powerful sound on startup, idle and accel.
Tuning - best advise - make all your mods and then have the car tuned.
Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
The tune will get you more than any cai, remember, the car will not run perfect either when you add more air as the maf will compensate and just add more fuel slightly negating the change so without the tune to tell the car how to think your gains will be minimal.
Thread Starter
Racer
Joined: Sep 2007
Posts: 379
Likes: 2
From: Johns Creek Georgia
Also think tune is more effective than CAI (for daily type driving). Question though: heat sensor soaks heat so provides high air temp reading which means even though cold air is provided, 'engine control' responds as for warm air. On my Vette it takes about 3 miles or more at 50mph before correct ambient temperature displays after driving off after parking with a warm engine which means to benefit from CA the heat sensor needs to be relocated. Can anyone explain?
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
Also think tune is more effective than CAI (for daily type driving). Question though: heat sensor soaks heat so provides high air temp reading which means even though cold air is provided, 'engine control' responds as for warm air. On my Vette it takes about 3 miles or more at 50mph before correct ambient temperature displays after driving off after parking with a warm engine which means to benefit from CA the heat sensor needs to be relocated. Can anyone explain?
Burning Brakes
Joined: Aug 2008
Posts: 802
Likes: 6
From: Oro Valley AZ
Also think tune is more effective than CAI (for daily type driving). Question though: heat sensor soaks heat so provides high air temp reading which means even though cold air is provided, 'engine control' responds as for warm air. On my Vette it takes about 3 miles or more at 50mph before correct ambient temperature displays after driving off after parking with a warm engine which means to benefit from CA the heat sensor needs to be relocated. Can anyone explain?
At the drag strip, I would have 140 degree AIT at launch from setting around and staging. At the end of the run the AIT would drop to about 110. That still backs out some significant timing. With the new placement, at launch i'm at 105 degrees and at 60' the AIT drops to about 5 degrees above AAT. AIT tables have been adjusted and the tune compensates for the air change.
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Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
On my C6, I moved the MAF forward to the output of the air filter, similar to the C5. The delta between the AAT and AIT dropped to about 4 degrees. The MAF is in a cooler location lessening the affects of heat soak.
At the drag strip, I would have 140 degree AIT at launch from setting around and staging. At the end of the run the AIT would drop to about 110. That still backs out some significant timing. With the new placement, at launch i'm at 105 degrees and at 60' the AIT drops to about 5 degrees above AAT. AIT tables have been adjusted and the tune compensates for the air change.
At the drag strip, I would have 140 degree AIT at launch from setting around and staging. At the end of the run the AIT would drop to about 110. That still backs out some significant timing. With the new placement, at launch i'm at 105 degrees and at 60' the AIT drops to about 5 degrees above AAT. AIT tables have been adjusted and the tune compensates for the air change.
Nice work, great info!
Safety Car
Joined: Feb 2007
Posts: 4,684
Likes: 107
From: Opelika Alabama
Thread Starter
Racer
Joined: Sep 2007
Posts: 379
Likes: 2
From: Johns Creek Georgia
On my C6, I moved the MAF forward to the output of the air filter, similar to the C5. The delta between the AAT and AIT dropped to about 4 degrees. The MAF is in a cooler location lessening the affects of heat soak.
At the drag strip, I would have 140 degree AIT at launch from setting around and staging. At the end of the run the AIT would drop to about 110. That still backs out some significant timing. With the new placement, at launch i'm at 105 degrees and at 60' the AIT drops to about 5 degrees above AAT. AIT tables have been adjusted and the tune compensates for the air change.
At the drag strip, I would have 140 degree AIT at launch from setting around and staging. At the end of the run the AIT would drop to about 110. That still backs out some significant timing. With the new placement, at launch i'm at 105 degrees and at 60' the AIT drops to about 5 degrees above AAT. AIT tables have been adjusted and the tune compensates for the air change.
Burning Brakes
Joined: Aug 2008
Posts: 802
Likes: 6
From: Oro Valley AZ
Anything that gets the MAF away from the engine heat is going to be beneficial. I certainly notice a drivability change. I calibrated the MAF after relocating it. At highway speed, here in southern California at night, my car is very responsive to the slightest throttle change.
