Screen in front of MAF

brucespot · 06-27-2005, 03:09 PM

Can any one tell me what that screen is for and what if I remove it. Seems like it just would reduce flow. And also what is the difference between the mac cold air and the Steeda besides price and do you really gain about 10 HP?
Thanks

WaterDR · 06-27-2005, 03:17 PM

The screen has a purpose. It is to provide smooth, laminar flow across the MAF. Testing has shown that removing the screen will lean-up your a/f a bit. Most after-market CAI's do not utilize the screen.

It is also entirely possible that some of the leaning gets corrected over time as the long-range fuel curves compensate for the lean a/f. I have never seen a good study that has evaluated this over a period of time.

It is unlikely in an n/a application, that a CAI would net 10 hp. The gain are probably small. However, a design like the Steeda will give you a nice ram air effect when drag racing. You can pull the headlight out for use at the track. You will see as much at 10 hp gain while at speeds and pick up as much as 1 - 2 miles per hour in the traps.

brucespot · 06-27-2005, 03:30 PM

Thanks man
So I take it, that I will get the Steeda over the mac and dont take the screen out?

MineralGT · 06-27-2005, 03:33 PM

Quote:

Originally Posted by brucespot

Thanks man
So I take it, that I will get the Steeda over the mac and dont take the screen out?

You should check these out too...Plastic piping doesn't heat up and performs well www.demolet.com you can order these systems at www.v6mustangstuff.com too, not as popular but about 80-100 bucks cheaper.

I have the CAI and they instructed me to take it out.

*4.6 Love* · 06-27-2005, 03:39 PM

I took that the screen of mine, didn't notice any difference!

Miguel

WaterDR · 06-27-2005, 10:07 PM

Every CAI I have seen requires you to pull the screen. The dirty little secret that the CAI manufactures don't want you to know is that that is where some of the hp improvement comes from. A leaner a/f (to a point) will net more hp.

Regarding the use of materials and to say that plastic is better than metal empirically has no basis in fact. This is one of those things that sounds good on paper or seems to make sense. However, I have never seen a study that has demonstrated that a plastic intake of same design will net more hp than a metal one. The difference in gains are so marginal in part because modern computer systems compensate for temperature changes.

We do know that colder in-comming air will result in hp gains, but I have never seen proof that a plastic intake can keep the incomming air cooler than a metal intake can to the point where there is a difference in hp.

dom · 06-28-2005, 09:01 AM

dont buy a cold air kit. get a nice filter and be done with it. sometimes the screen leans you out, sometimes it doesnt.

NoKturnaL · 06-28-2005, 11:12 AM

If getting any aftermarket Intake system, I suggest one with a Plastic intake tube.....

And the MAF screen is not NEEDED at all........Took mine out... dont notice any negative issues...

06-27-2005, 03:09 PM	#1 (permalink)
brucespot Senior Member Join Date: Apr 2005 Posts: 128	Screen in front of MAF Can any one tell me what that screen is for and what if I remove it. Seems like it just would reduce flow. And also what is the difference between the mac cold air and the Steeda besides price and do you really gain about 10 HP? Thanks __________________ 2004 Mustang GT Premium/5-Speed Hurst Pistol Grip Shifter w/nitrous Button on Top 150 Shot, Complete Wet Cold Fusion Nitrous System BBK tuned headers and H-pipe to slp loudmouths Steel forged Bottom End Patrick racing Heads Steeda underdrive pullies BBK cold air intake BBk CAI and Trick flow Plenum,70mm throttle body Front Sway Bar Removed Steeda Tri-ax Shifter Billit fuel cap Rear Seat Delete Diablo Tune,275 Avons,4.10s

06-27-2005, 03:17 PM	#2 (permalink)
WaterDR Administrator Join Date: Sep 2004 Posts: 6,391	The screen has a purpose. It is to provide smooth, laminar flow across the MAF. Testing has shown that removing the screen will lean-up your a/f a bit. Most after-market CAI's do not utilize the screen. It is also entirely possible that some of the leaning gets corrected over time as the long-range fuel curves compensate for the lean a/f. I have never seen a good study that has evaluated this over a period of time. It is unlikely in an n/a application, that a CAI would net 10 hp. The gain are probably small. However, a design like the Steeda will give you a nice ram air effect when drag racing. You can pull the headlight out for use at the track. You will see as much at 10 hp gain while at speeds and pick up as much as 1 - 2 miles per hour in the traps. __________________ Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump My Car My Email

06-27-2005, 03:30 PM	#3 (permalink)
brucespot Senior Member Join Date: Apr 2005 Posts: 128	Thanks man So I take it, that I will get the Steeda over the mac and dont take the screen out? __________________ 2004 Mustang GT Premium/5-Speed Hurst Pistol Grip Shifter w/nitrous Button on Top 150 Shot, Complete Wet Cold Fusion Nitrous System BBK tuned headers and H-pipe to slp loudmouths Steel forged Bottom End Patrick racing Heads Steeda underdrive pullies BBK cold air intake BBk CAI and Trick flow Plenum,70mm throttle body Front Sway Bar Removed Steeda Tri-ax Shifter Billit fuel cap Rear Seat Delete Diablo Tune,275 Avons,4.10s

06-27-2005, 03:39 PM	#5 (permalink)
4.6 Love Super Moderator Join Date: Sep 2004 Location: Mexico Posts: 6,179	I took that the screen of mine, didn't notice any difference! Miguel __________________ Go Cowboys! X pipe and flows

06-27-2005, 10:07 PM	#6 (permalink)
WaterDR Administrator Join Date: Sep 2004 Posts: 6,391	Every CAI I have seen requires you to pull the screen. The dirty little secret that the CAI manufactures don't want you to know is that that is where some of the hp improvement comes from. A leaner a/f (to a point) will net more hp. Regarding the use of materials and to say that plastic is better than metal empirically has no basis in fact. This is one of those things that sounds good on paper or seems to make sense. However, I have never seen a study that has demonstrated that a plastic intake of same design will net more hp than a metal one. The difference in gains are so marginal in part because modern computer systems compensate for temperature changes. We do know that colder in-comming air will result in hp gains, but I have never seen proof that a plastic intake can keep the incomming air cooler than a metal intake can to the point where there is a difference in hp. __________________ Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump My Car My Email

06-28-2005, 09:01 AM	#7 (permalink)
dom whos gonna ban me next? Join Date: Apr 2005 Location: baltimore, MD Posts: 1,268	dont buy a cold air kit. get a nice filter and be done with it. sometimes the screen leans you out, sometimes it doesnt. __________________ 2007 explorer limited procharged 2002gt sold new project: 427w c4 9" fox

06-28-2005, 11:12 AM	#8 (permalink)
NoKturnaL MustangTuning 5-oh Join Date: Dec 2004 Location: Peabody, MA Posts: 1,950	If getting any aftermarket Intake system, I suggest one with a Plastic intake tube..... And the MAF screen is not NEEDED at all........Took mine out... dont notice any negative issues... __________________ 2002 Mustang GT Coupe 5-Speed Performance K&N Intake Accufab upper Intake Plenum Accufab 70mm Throttle Body Steeda Pullies SCT 4-Bank Chip Dyno Tuned Mac H-pipe Flowmaster Cat-Back Steeda Shifter Centerforce Clutch SLP-Line-Lock And more upgrades visually

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