steven mack

Does cutting open the air filter lid and adding a K&N air filter add any Horse power?Also cutting out the screens on a Maf?Thanks,Steve

BrandensBeast

I've heard a lot of people say this but haven't seen any proof personally, i'm curious to this as well.

sluggballz

There's an online magazine article about these mods and a few other cheap, or easy, or whatever you want to call em. I think it's car craft mag that did it on a 95 coupe. They ran a base and then did the mods. Iirc they did pick up a few ponies, somewhere around 10-12, maybe a bit more. I can't seem to locate the article right now. It features a polo green coupe and they do the work and testing in Florida. Seems that for a few hundred dollars you could get about 12-15 hp with everything they tested and did. I'm old and maybe can't remember the article correctly, but maybe you can find it.
I know I've done the screen and cut the air box lid as well as installed Taylor wires and a nice set of Shorty headers ( I have a 95 vert and didn't want to get all involved with headers and the X brace as well as just wanting to get rid of a set of cracked stock exhaust manifolds) and muffler eliminators and noticed a little SOTP Dyno increase. Lol.
Found the article it was a 96 instead of 95 coupe.

http://www.superchevy.com/how-to/vem...ngine-buildup/

steven mack

Thanks for the answers guys.I really liked the Super Chevy article sluggballs.12 to 15 rear wheel horsepower is a pretty good increase for not a lot of money.I have a built 400 small block in my Vette so I might see a little more power.

aklim

IDK. Some have said descreening may give a little power but it can make the sensor unpredictable unless properly tuned, others say no. Either way, not going to feel more than a placebo effect with that little possible gain.

Baddabing

I did mine - can't feel any difference...

Guide:

vettpapaw

I cut out the screen and cut the air box lid on my 88, when I owned it. I'm not sure it helped but made me feel better..

aklim

Mine was on a dyno. Biggest gain is between nothing and air filter with the **** removed. Mid point is a conical air filter. About under 10 HP IIRC. Mine doesn't make me feel any better though

billschroeder5842

Yes, I'm not sure there is much of anything to be gained. I'm always under the assumption that if it were THAT easy the engineers would have done it anyway as filters and cutting sheet metal is pretty easy gain?

Placebo effect at best. The air intake is not the Choke points on our cars.

ryank9398

I see that the air box lid in the superchevy article is from Breathless, and they have it listed for up to model years 85- 89. Could someone describe for me the difference in the 90 and up air box lid that would make this incompatible? Or can it be retrofitted? MAM has two different part numbers for the lid for early and late C4s. MAM also has an interesting piece called the Power Coupler which replaces the corrugated bellows with a smooth rubber piece between the air box and throttle body. Any thoughts on that?

aklim

Could be the L98 in the 90 to 91 years have speed density and no MAF.

Unless they have a dyno sheet from an independent source, I think it may not make a difference or much of a difference unless you are running something ridiculous

krackenvette

No way. And if you monitor your Intake Air Temperature , you will notice at speed the Intake Air Temp is the same as outside air.. on my 93 it is..I have a cut lid, and it was the same without cut lid.

aklim

Shouldn't change the air temperature by cutting the slats

krackenvette

Some believe the cutting lid modification also brings in cooler air.
Thats why i threw that in there.
Also, if you have MAF,the K&N oil will get it dirty quicker..

aklim

I have heard it increases the airflow but not sure if it will bring in cooler air since I can't see how. The air that comes in goes through the same path unless you install a snorkel.

Especially if you pour the oil in very thick.

krackenvette

Thats why I stated it does not change air temperature into engine.

aklim

I'd be curious how those people who said it changes air temp discovered that.

krackenvette

I used TTS datamaster to see what was going on.
I think most people just follow the flow of snake oil modifications to the C4.. Of which there are many, I fell for some of them too,
396LT1 fixed all that...

Cliff Harris

This thread will go you some things to think about:

https://www.corvetteforum.com/forums...post1584808593

kenmohr

Does anyone know what the CFM is in the worst area of the intake system? If the air filter will let 100 CFM in and the MAF will allow 80 CFM Opening the air filter will do nothing. I sure would like to know the weak link is _____.