Holy Shiznit, removed the MAF screen...

SlammedA4 · 03-31-2003, 03:43 PM

I have a "TDL RACING" style intake (relocated battery, etc) and I figured.. what the heck.. I'll try this screen remove thing.

My jaw dropped to the floor, MAN this thing is WAY WAY faster than before, and a bit TOO loud as well.. When the secondary opens up at about 4K, the thing just screams!

I would have NEVER thought of doing that without this forum.. Thanks guys!

VAP · 03-31-2003, 03:55 PM

either as a stand-alone or in the base of a cone filter to smooth the inlet air it's not a matter of "if" you're gonna throw a CEL but simply when. Without a smooth, non-turbulent flow of air past the sensor wire in the MAF the car is on borrowed time til it idles rough, throws a CEL or goes into limp mode.

And your "secondary" is mechanical linkage and opens up anytime the accelerator is floored. What you're hearing is the RPM threshhold where the cams start to breathe and come alive. Transition into that sweet spot starts at a smidge over 3750 RPM's. Thats where you get that seriously good induction sound.

Mr.D-'97 A4q 12v · 03-31-2003, 04:27 PM

the thread is locked. I thought of it a few minutes after I posted. I don't know why it says the thread is locked considering people have been replying to it. I couldn't edit another post either. Must be something with my account.

MikTip · 03-31-2003, 05:05 PM

I've had the MAF screen out now for over a few years!

Audiboy · 03-31-2003, 05:11 PM

other things also. Must be something special.

And I don't have a MAF screen, but I have a special cone filter inside my air box (well, that was preturbo days)

VAP · 03-31-2003, 05:12 PM

VAP · 03-31-2003, 05:24 PM

it seems to bear out the just under 3800 RPM power curve all the way to 5600 RPM's where it falls off. This compares equally with the only other 2.8 dyno plot I've seen.

But we're pickin fly poop out of pepper here. Bottom line: It kicks in "just a little before" 4k.

MikTip · 03-31-2003, 05:26 PM

It gets rotated with a regular K&N, when I clean the filter.

My MAF's been modified as well(simular to picture)! ;O)

Sample tube re-calibrated.

VAP · 03-31-2003, 05:28 PM

VAP · 03-31-2003, 05:39 PM

transmissions. All with stock air box housings, every single one threw a code, started to idle rough or went into limp mode within a week. Not 4 or 5 of em. Not 6 of em. All 7!

But I'll admit that a whole 'nother dynamic comes into play with a cone filter and I make no pretense about knowing why someone's cone system doesnt do what someones stock airbox system will do.

But everyone can do as they wish. CEL is a simple fix... no permanent harm. But When Mr D does the next dyno run with/without the air horn I'll bet dollars it adds HP! And it costs next to nothing so why the "mine ran fine without it" mentality? This isnt really about throwing codes. It's about making power. And this mod makes power. With "mine ran fine without it" attitude we'd still be driving Model A's.

03-31-2003, 03:55 PM	#2
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	If you don't have a bell-flair type inlet just ahead of the MAF screen... either as a stand-alone or in the base of a cone filter to smooth the inlet air it's not a matter of "if" you're gonna throw a CEL but simply when. Without a smooth, non-turbulent flow of air past the sensor wire in the MAF the car is on borrowed time til it idles rough, throws a CEL or goes into limp mode. And your "secondary" is mechanical linkage and opens up anytime the accelerator is floored. What you're hearing is the RPM threshhold where the cams start to breathe and come alive. Transition into that sweet spot starts at a smidge over 3750 RPM's. Thats where you get that seriously good induction sound.

03-31-2003, 04:27 PM	#3
Mr.D-'97 A4q 12v Member Garage is empty, add now Join Date: Jun 2002 Posts: 8,112	I tried editing my post to add that info and it keeps telling me that the thread is locked. I thought of it a few minutes after I posted. I don't know why it says the thread is locked considering people have been replying to it. I couldn't edit another post either. Must be something with my account. __________________ ***** '05 Boxster S (Speed Yellow) '97 A4 2.8Q 12V (Cactus Green) Mods? I got 'em. Baltimore, MD

03-31-2003, 05:05 PM	#4
MikTip AudiWorld Expert Garage is empty, add now Join Date: Jun 2000 Posts: 29,354	Me 93 90 never got a light from running without the MAF screen! ;O) I've had the MAF screen out now for over a few years! __________________ 2004 A4 1.8t USP Quattro 6MT K04-15/APR/TT 225 Injectors/Custom Stainless Exhaust/710N/RaceTec FMIC 034 HFC/Jet-Hot Cermi-coated & ported exhaust manifold Spec Stage 3+ with OE DMFW! Neuspeed TIP/Neuspeed Snub/Optima 75-35/AFE Pro-Dry/FSI Coils AMS Short-shift @ %40 redux(Sweet!) ST Coils/ H-Sport Anti-Sway bars/E-codes 19x8.5 OEM Audi Skinny Fives with 235-35 Bridgestone 760 Sport Skins B7 A4 brakes with StopTech Ceramic pads and Stop Tech rotors Sirius Satellite Radio Ross-Tech HEX-USB+CAN Equipped Escort 9500ix

03-31-2003, 05:11 PM	#5
Audiboy AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,204	4000 rpm exactly. I measured this, and Audi has been using 4000rpm trigger on a lot of cars for other things also. Must be something special. And I don't have a MAF screen, but I have a special cone filter inside my air box (well, that was preturbo days)

03-31-2003, 05:12 PM	#6
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	but you run a cone filter with integrated cone directly at the MAF inlet if I remember correctly.

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03-31-2003, 05:24 PM	#7
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Take a look at Mr D's dyno plot a little further down on the page... it seems to bear out the just under 3800 RPM power curve all the way to 5600 RPM's where it falls off. This compares equally with the only other 2.8 dyno plot I've seen. But we're pickin fly poop out of pepper here. Bottom line: It kicks in "just a little before" 4k.

03-31-2003, 05:26 PM	#8
MikTip AudiWorld Expert Garage is empty, add now Join Date: Jun 2000 Posts: 29,354	Re: Sometimes......... It gets rotated with a regular K&N, when I clean the filter. My MAF's been modified as well(simular to picture)! ;O) Sample tube re-calibrated. __________________ 2004 A4 1.8t USP Quattro 6MT K04-15/APR/TT 225 Injectors/Custom Stainless Exhaust/710N/RaceTec FMIC 034 HFC/Jet-Hot Cermi-coated & ported exhaust manifold Spec Stage 3+ with OE DMFW! Neuspeed TIP/Neuspeed Snub/Optima 75-35/AFE Pro-Dry/FSI Coils AMS Short-shift @ %40 redux(Sweet!) ST Coils/ H-Sport Anti-Sway bars/E-codes 19x8.5 OEM Audi Skinny Fives with 235-35 Bridgestone 760 Sport Skins B7 A4 brakes with StopTech Ceramic pads and Stop Tech rotors Sirius Satellite Radio Ross-Tech HEX-USB+CAN Equipped Escort 9500ix

03-31-2003, 05:28 PM	#9
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	Re: but you run a cone filter with integrated VS directly at the MAF inlet if I remember correctly.

03-31-2003, 05:39 PM	#10
VAP AudiWorld Super User Garage is empty, add now Join Date: Mar 2000 Posts: 13,990	All I know is on 7 cars... 4 ea 90S and 3 A4's with a combination of manual and automatic... transmissions. All with stock air box housings, every single one threw a code, started to idle rough or went into limp mode within a week. Not 4 or 5 of em. Not 6 of em. All 7! But I'll admit that a whole 'nother dynamic comes into play with a cone filter and I make no pretense about knowing why someone's cone system doesnt do what someones stock airbox system will do. But everyone can do as they wish. CEL is a simple fix... no permanent harm. But When Mr D does the next dyno run with/without the air horn I'll bet dollars it adds HP! And it costs next to nothing so why the "mine ran fine without it" mentality? This isnt really about throwing codes. It's about making power. And this mod makes power. With "mine ran fine without it" attitude we'd still be driving Model A's.

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