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This is why some people don't have MAF screens


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http://www.lincolnvscadillac.com/showthread.php?t=25202

AFter the first post it is actually somewhat hard to follow what they are saying, a bit of a bird walk with no paragraphs but all in all I think they set the guy strait. Some of it is good (I think) but most we know is not a good idea.

"MORE POWER BETTER SOUND....

I own a 1998 Deville Concours. There's not too many go-fast goodies out there for us, so check this out if you want a better sound from under the hood, more power, and ( I suppose ) better mileage.

1. Remove the factory airbox top, and cut out all the baffles. I did this with a dremel. -Be careful of the temp. probe, just unhook it for now, and re-install later, after the chopping is done.

If you're really talented, and brave, remove the lower assembly too. ( -Be careful, the computer is in there! ) Next permanently remove the factory "snorkel/silencer". It's an oval horn shaped object that sits between the airbox assembly and the front of the car. -This also restricts airflow.

2. Install a K & N panel filter.

3. Remove the MAF ( Mass Air Flow Meter ) from the throttle body, and remove the screen. -Major air restiction! Be very careful of the electronics, you really don't want to replace them if you don't have to. To remove the screen, use needlenose pliers, and just rip the screen out.

4. Spray out throttle body with Air intake/throttle body cleaner.

5. Clean up all the parts well, and re-install.

I did this to mine, and it sounds much better, and really jumps when you hit the accelerator. These are tried and true tricks, that I did on both my 5.0 Mustangs, and just applied them to the Cadillac Motor. If done correctly, the car will perform much better, and won't throw any warning lights.

Anybody else have any performance mod's?"

The Green's Machines

1998 Deville - high mileage, keeps on going, custom cat-back exhaust

2003 Seville - stock low mileage goodness!

2004 Grand Prix GTP CompG - Smaller supercharger pulley, Ported Exhaust Manifolds, Dyno tune, etc

1998 Firebird Formula - 408 LQ9 Stroker motor swap and all sorts of go fast stuff

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E, I did the same thing, sounds better but I guess the correct answer is sounds louder( must be faster, remember the 1970's glasspacks and N50's :blink: ) I put it back to stock :)

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http://www.lincolnvscadillac.com/showthread.php?t=25202

AFter the first post it is actually somewhat hard to follow what they are saying, a bit of a bird walk with no paragraphs but all in all I think they set the guy strait. Some of it is good (I think) but most we know is not a good idea.

"MORE POWER BETTER SOUND....

I own a 1998 Deville Concours. There's not too many go-fast goodies out there for us, so check this out if you want a better sound from under the hood, more power, and ( I suppose ) better mileage.

1. Remove the factory airbox top, and cut out all the baffles. I did this with a dremel. -Be careful of the temp. probe, just unhook it for now, and re-install later, after the chopping is done.

If you're really talented, and brave, remove the lower assembly too. ( -Be careful, the computer is in there! ) Next permanently remove the factory "snorkel/silencer". It's an oval horn shaped object that sits between the airbox assembly and the front of the car. -This also restricts airflow.

2. Install a K & N panel filter.

3. Remove the MAF ( Mass Air Flow Meter ) from the throttle body, and remove the screen. -Major air restiction! Be very careful of the electronics, you really don't want to replace them if you don't have to. To remove the screen, use needlenose pliers, and just rip the screen out.

4. Spray out throttle body with Air intake/throttle body cleaner.

5. Clean up all the parts well, and re-install.

I did this to mine, and it sounds much better, and really jumps when you hit the accelerator. These are tried and true tricks, that I did on both my 5.0 Mustangs, and just applied them to the Cadillac Motor. If done correctly, the car will perform much better, and won't throw any warning lights.

Anybody else have any performance mod's?"

1) the baffles are in there to stop rain water from getting into your intake, the rain mist/droplets at highway speeds come right in, hit the baffles and are shunted to drain out of the air box...Without the baffles there is nothing to stop the water from getting into your intake. So one day if you are on a highway in the rain and your engine stops running consider that your engine is hydrolocked..from ingesting rain water...

2) Did you remove the box from around the PCM?..... The intake pulls air over the PCM to cool it. In bumper to bumper traffic in AUGUST that is very useful, if you begin to have PCM problems realize that HEAT is a processors and capacitors worst enemy....just like computers

3) K&N filter, it has been proven to allow more dirt into your engine. Change your oil more often now and keep your fingers crossed that road dirt doesn't score your cylinder walls and cause greater oil consumption or cake your rings over time.

I am not sure what the MAF screen does but if its there, its there for a reason.

I keep going back to the fact that we have a 279 cu in engine that puts out 300 HP in the Concours flavor. That is more than one HP per CI. In my day that was impressive when the Chevy's were 427ci/435 hp, 327ci /350 hp, etc...

A wise sage that used to frequent this site once said all of the low hanging fruit has been picked, to pull more out of this engine you will need to spend big money.

When I was a kid, I used to take the air filter off my dads 64 and 65 Caddys and run then with an open CARTER AFB, that is until it backfired and set fire to the hood pad... I liked the noise of the AFB when the secondaries opened, but it sucked fiberglass hood pad material in along with dirt and as I mentioned it was a fire hazard. Serious tradeoffs

I would suggest that you take your car to a dyno and run it and see what impact your modifications made and then sit back consider what you have compromised to get those gains if there are any. Its also possible that you have HP loses and that you are getting more noise with very little or no gain. But I can fully understand that the added noise is 'cool' from when I was a kid.. just watch out for the downside of your 'gains'...

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Your lucky Mike, you remember what a Carter or a Quadrajet sounded like, best sound in the World :)

OH yea..... better than sex :lol: BOTH of those carburators had an incredible WAAAAHHHHH when the secondaries sprung open.....and you were pinned to the seat, OMG!!!!!

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Here is another side of de-screening the MAF...

http://www.cincinnatistreetracing.com/comm...p?showtopic=970

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I am not sure what the MAF screen does but if its there, its there for a reason.

It's not a "screen". It is an air flow straightener to ensure that the MAF gets accurate air flow measurements. It is not restrictive and removing it will do more harm than good. As the Guru used to say, those guys don't know what they don't know.

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Yes, that is what they said at that link I provided above regarding de-screening the MAF....

Can you imagine GM installing something that wasn't needed? :lol:

EGreen should get one of these, to get some RAM AIR going on, CADILLAC ATTACK Baby! (notice the upscale housing in the background)

I can't remember if this photo was taken in South Jersey, Delaware or Georgia...I made a U-TURN to take that photo, I was driving my 74 Eldorado! :lol: Notice the ole skewl key "FOB" on the front fender to engage the ALARM! :lol:

post-2998-1173031013.jpg

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I should have put that in quotes, I DIDN"T DO THIS, the guy at the link did :P

The Green's Machines

1998 Deville - high mileage, keeps on going, custom cat-back exhaust

2003 Seville - stock low mileage goodness!

2004 Grand Prix GTP CompG - Smaller supercharger pulley, Ported Exhaust Manifolds, Dyno tune, etc

1998 Firebird Formula - 408 LQ9 Stroker motor swap and all sorts of go fast stuff

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OH, thanks heavens!

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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One guy once told me something. GM spent millions of dollars engineers our cars and trucks to run the best that they can. Doing quick fixes, like cutting stuff out, is just going to mess something up, whether it's now or later.

I used to use a K&N filter in my suburban because it came with it. I just threw it away the other day. I get better protection and results from my AC Delco filter.

-Dusty-

- 02 Seville STS, white diamond

- 93 Sixty Special, Tan with vinyl top

- 79 Coupe DeVille, Tan with Tan top

- 06 GMC Sierra Z71, Black

- 92 Silverado C1500, black and grey

- 83 Chevy K10 Silverado, Black and Grey

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Genius is wasted on the uninformed and the ignorant.

I'll not ever understand why lawn chair mechanics think they know better than a herd of design engineers.

Regards,

Warren

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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I should have put that in quotes, I DIDN"T DO THIS, the guy at the link did

I understood that.

GM spent millions of dollars engineers our cars and trucks to run the best that they can. Doing quick fixes, like cutting stuff out, is just going to mess something up, whether it's now or later.

Could not agree more.

I'll not ever understand why lawn chair mechanics think they know better than a herd of design engineers.

That never cease to baffle me either. On the other hand, I can remember when I was younger and "smarter" than most engineers. :rolleyes:

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I should have put that in quotes, I DIDN"T DO THIS, the guy at the link did :P

Sorry this line made me think you did this modification:

I did this to mine, and it sounds much better, and really jumps when you hit the accelerator.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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That never cease to baffle me either. On the other hand, I can remember when I was younger and "smarter" than most engineers. :rolleyes:

I remember a time, about forty or so years ago, when I was smarter than my Dad. Somehow that changed as I grew older . . . .

How'd that happen? :blink::blink::blink:

Regards,

Warren

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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Yeah, me to. When I got out of high school, I couldn't believe how dumb he was. When I got out of the Army, I was amazed at how much he had learned in 2 short years. :lol:

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Yeah, me to. When I got out of high school, I couldn't believe how dumb he was. When I got out of the Army, I was amazed at how much he had learned in 2 short years. :lol:

:lol::lol::lol::lol::lol::lol::lol::lol::lol::lol::lol:

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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On some vehicles removal of the MAF screen has been shown on a chassis dyno to be an improvement. In my tests on my 96 STS Northstar it did not improve acceleration.

However, I think we should encourage experimentation as it sometimes leads to innovation.

The bottom line to me is try it, test it, report the results so others can attempt to duplicate the same tests with the same results. The factory engineers are good at their jobs, but they have different priorities and trades than the owners.

If you are interesting in mods, try it, test it, report back. For the others, who are happy with their Cadillac as designed, all good. I respect both approaches.

Bruce

2023 Cadillac CT4-V Blackwing

Follow me on: Twitter Instagram Youtube

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The bottom line to me is try it, test it, report the results so others can attempt to duplicate the same tests with the same results.

Nutshell!

You've covered it well. Ranger's father would have likely have agreed with you. My father as well.

Regards,

Warren

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There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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My first post did say to put it on a dyno also.... however my response is based upon things I have heard from the guru regarding the air box and K&N testing and our overall opinion.. I didnt have an opinion on the MAF screen but posted a performance site that opined on it and gave the reason its in place..

But while we shouldnt discourage experimentation I think if we didn't point out something from our knowledge base it would be remiss. I can clearly recall the guru highlighting the reasons the air box was designed in the way it was..

At that point I said, run it on a dyno... Bruce, you have been good with testing your modifications, I think its a good thing to do.

As many of you know, at times I can't help having fun with this stuff sometimes with the Cadillac Attack ram air...

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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They really show their ignorance when someone says something like, "well, the airbox is up behind the headlights, how much dirt can there me, it's just air." Uh-huh.

I agree with Bruce that experimentation is sometimes good, but that must be qualified. We're generally a good-natured group and don't like seeing others possibly damage their machinery over something as ignorant as an air filter, and not realizing that there's dirt in "just air" also.

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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However, I think we should encourage experimentation as it sometimes leads to innovation.

The bottom line to me is try it, test it, report the results so others can attempt to duplicate the same tests with the same results.

Yep, people I know call it the "Scientific Method."

Works every time!

Regards,

Warren

Posted Image

There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises

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