maf screens removal

[88canadianvette]

is it worth the effort? and if it is what could the benefit be?

 

[chevyaddict]

I'm interested in responses to this as well.....

 

[JT ZR-Won]

I removed mine and never had any problems. Never noticed a difference in power but I know every little bit helps.

Jay

 

[Redbob]

I did it, maybe 60K miles back, no problems.
Did it exactly as described in the TPIS book, and I saved them for re-installation if there turned out to be no improvement.
Just too lazy to put them back though.
- R

 

[Edmond]

Did mine a few weeks ago. Can't say I notice much improvement. The single mod where I noticed the most improvement was cutting the filter lid open.

 

[wookiebear]

Ported MAF

I removed my factory MAF and replaced it with the Granetelli MAF,which does not have any screens at all in them. the gain is very minimal at best, but again every little bit helps. Its not a big job, just be careful that you do not cut the electronic element thats on the inside. I would not be concerned with any debris getting by, just make sure that you have a real good air cleaner preferrably a K&N, with doing both at the same time you will notice a difference in response and acceleration, while you have that apart you should also do the throttle body bypass mod that will add a tiny bit more and before you know it you picked up 10 to 15 honest RWHP! Then its AFR Heads, 3.73 rear, shift kit etc. etc.etc, etc, and you hooked for life! LOL!!!

 

[l98vette1986]

The aftermarket MAF is a little on the high side for me, so i cut my screens, and sawwed out my 7 aluminumn heat sinks, i wasnt satisfied so i used my mighty Dremel grinder, and honed out the whole thing. Personally i think that this should be done as more air=more power. you may not feel a difference, but just as a test, if you have an old MAF that you dont use, leave the screens in and blow through it w/ your hand about 3 inches from the other side, then cut the screens and chop the fins, and try again. you will notice a big difference. It will make air flow smoother. Another thing that i did was hone out the port on my air box right before it snaps to the MAF, This is got to be the least restrictive stock intake ducts in existance. Another "maybe mod" i did was relocate my MAT sensor to the air box, and the cooles 2 things i did was make a home made ram air system for it, then i relocated the ambient air temp sensor in it so i could push a button on the climate control (ext temp button) and see what the air temp going into the engine is. Have fun, and be creative trying to go faster.

 

[-=Jeff=-]

Re: Ported MAF

I removed my factory MAF and replaced it with the Granetelli MAF,which does not have any screens at all in them. the gain is very minimal at best, but again every little bit helps. Its not a big job, just be careful that you do not cut the electronic element thats on the inside. I would not be concerned with any debris getting by, just make sure that you have a real good air cleaner preferrably a K&N, with doing both at the same time you will notice a difference in response and acceleration, while you have that apart you should also do the throttle body bypass mod that will add a tiny bit more and before you know it you picked up 10 to 15 honest RWHP! Then its AFR Heads, 3.73 rear, shift kit etc. etc.etc, etc, and you hooked for life! LOL!!!

The granetellli MAF is only for LT1/4 cars.. The L98 uses a different MAf unit and the only way to increase flow is removing the screens and cutting the fins.. But this only will increase flow on the Mechanical Side. The ECM now becomes the restriction in the L98 at higher horsepower

 

[Redbob]

The aftermarket MAF is a little on the high side for me, so i cut my screens, and sawwed out my 7 aluminumn heat sinks, i wasnt satisfied so i used my mighty Dremel grinder, and honed out the whole thing. Personally i think that this should be done as more air=more power.

Depends on where you live - and drive: I wouldn't want to cut out the heat sinks if I were driving here in Texas, in the summer.
OTOH, you could always have a "winter" MAF sensor with fins removed, and a "summer" one with fins intact.

 

[Ken]

Just a tidbit of information if you're interested...

...but when I pulled some dyno runs the other day we removed the MAF (I've still got it in place until I find new ductwork for the intake) and the accordion-pleat ducting for one run; the throttle body was open directly to the outside air. Also, the MAF I had in place is the hogged-out one with no screens or fins.

The runs we pulled with the MAF off were no different than the ones pulled with the MAF and ductwork in place. It could be that mine hasn't had all of the bugs worked out yet, or it could mean that the difference (with or without the MAF) isn't that noticeable. Just like the "air foil" insert for the throttle body basically being a waste of time and money.

Len, Psychosomatic? :L

psy·cho·so·mat·ic (si´ko-so-matik) adjective

• Of or relating to a disorder having physical symptoms but originating from mental or emotional causes.
• Relating to or concerned with the influence of the mind on the body, especially with respect to disease: psychosomatic medicine.

— psy´cho·so·mati·cal·ly adverb

Did it make you sick? :L

_ken

 

[-=Jeff=-]

Re: Just a tidbit of information if you're interested...

...but when I pulled some dyno runs the other day we removed the MAF (I've still got it in place until I find new ductwork for the intake) and the accordion-pleat ducting for one run; the throttle body was open directly to the outside air. Also, the MAF I had in place is the hogged-out one with no screens or fins.

The runs we pulled with the MAF off were no different than the ones pulled with the MAF and ductwork in place. It could be that mine hasn't had all of the bugs worked out yet, or it could mean that the difference (with or without the MAF) isn't that noticeable. Just like the "air foil" insert for the throttle body basically being a waste of time and money.


_ken

Makes sense.. the is enough physical area for the MAF to flow really well.. it is when you start modifying the motor and need to tune the ECM that the MAF becomes restrictive..

Here are 2 pictures of my new duct work.. still needs to be painted
http://jeff.vettextc.net/no-MAF/

 

[rrubel]

Re: Just a tidbit of information if you're interested...

...but when I pulled some dyno runs the other day we removed the MAF (I've still got it in place until I find new ductwork for the intake) and the accordion-pleat ducting for one run; the throttle body was open directly to the outside air. Also, the MAF I had in place is the hogged-out one with no screens or fins.
/B]

Ken, what is your car using to measure airflow instead of a MAF?

[RICHR]

 

[-=Jeff=-]

Re: Re: Just a tidbit of information if you're interested...

Ken, what is your car using to measure airflow instead of a MAF?

[RICHR]

He converted to the 7730 F-body ECM and is using a MAP sensor

 

[Ken]

Jeff, what did you use to fill the gap? Is that a piece of PVC pipe? I was told places like Home Depot have rubber ducting that might be a way to go, I'm gonna check in on it one of these days. HD is not one of my favorite places to visit.

_ken

 

[-=Jeff=-]

Jeff, what did you use to fill the gap? Is that a piece of PVC pipe? I was told places like Home Depot have rubber ducting that might be a way to go, I'm gonna check in on it one of these days. HD is not one of my favorite places to visit.

_ken

YES IT IS!!!

3" dia PVC about 6 or 7" long. I also used a 3" to 3" and a 3" to 4" Fernco Couplers

Works like a charm