MAF honeycomb restrction

[Jerryl]

I know this has been posted somewhere . . .

Had a discussion with a buddy on this. Realizing it may not be a restriction on a specific setup, amd the question was: how much if a restriction is the honeycomb?

 

[Pronto]

Without it the stock MAF won't work right. The new plastic LS style has no restrictions.

 

[Jerryl]

Without it the stock MAF won't work right. The new plastic LS style has no restrictions.

Running SD with MAF in place (disconnected).

 

[Pronto]

Pop it out and replace with a piece of aluminum tubing...

 

[TT/Ameasap]

Imagine the surface area of the screen that is blocking the air. Subtract that from the area of the tube its in. I have a scrunched up screen to demonstrate this if needed, but I think you would get the picture. Take it out and replace it with an aluminum pipe.
Heres real proof.

 

[dvernst]

Without it the stock MAF won't work right. The new plastic LS style has no restrictions.

When I switched to 120 lbs injectors my blm's were way out, and I tried taking the screen out. It now idles, and runs better all around.

 

[dvernst]

Just taking the screen out and leaving the maf in is pretty much the same as replacing it with a piece of tubing isn't it?

Posted from the TurboBuick.Com mobile app

 

[TT/Ameasap]

Just taking the screen out and leaving the maf in is pretty much the same as replacing it with a piece of tubing isn't it?

Posted from the TurboBuick.Com mobile app

Yes and no. It is better, but you still have the electronic board in the middle, which isnt much of a restriction. On the other hand, it could be robbing a few cfm and like the video shows, add up a little here and there and that could be the difference in winning a race.
I would pull it so its not exposed to heat/vibration anymore than it has to be and store it inside. After a few months of running mafless, I sold mine for 100 bucks.

 

[Pronto]

When I switched to 120 lbs injectors my blm's were way out, and I tried taking the screen out. It now idles, and runs better all around.

You were running 120lb injectors with a stock MAF with both screens removed? Was the MAF still used for the tune?

 

[dvernst]

I still am... Been great so far on e85.

Posted from the TurboBuick.Com mobile app

 

[Pronto]

Anyone I know that tried no screens at all in the stock MAF ran sketchy. One in front will work ok. Stepping up to another MAF will really increase your airflow. You might want to consider that with your mods.

 

[dvernst]

Anyone I know that tried no screens at all in the stock MAF ran sketchy. One in front will work ok. Stepping up to another MAF will really increase your airflow. You might want to consider that with your mods.

Car runs pretty well right now. All around driveability is pretty decent, and it's going faster than it ever has. Do you really think it would be worth getting a Translator and maf for $300+? I tried no screens on gasoline with 60's, and it ran erratically, pretty good this way though. I think if I make a change I'll go SD, and no maf...

 

[Jerryl]

. . . . I have a scrunched up screen to demonstrate this if needed . . .

Any idea of the total surface area?

 

[TT/Ameasap]

Any idea of the total surface area?

No i dont, I cant form it to a solid,but one look at it tells you it is a restriction.

 

[Jerryl]

Btw . . . For clarification of the discussion and associated question . . . .
An 85mm MAF on a stock/bolt on motor will more than likely not be a restriction, with or without screen. On a SII, it may be a restriction, depending on the operating paremeters.

Any restrction on the inlet side will decrease turbo efficiency (increase charge temp), resluting in increased lag.

To determine the effect on a setup under certain operating parameters, the hierarchy of testing "real world/flow bench/engineering modeling" would assist us in final decision.

Trying to get a feel of the area occupied by the screen.

 

[Pronto]

Car runs pretty well right now. All around driveability is pretty decent, and it's going faster than it ever has. Do you really think it would be worth getting a Translator and maf for $300+? I tried no screens on gasoline with 60's, and it ran erratically, pretty good this way though. I think if I make a change I'll go SD, and no maf...

Depends on how much you like to fiddle with tuning. The SD2 would eliminate the MAF. It costs about the same as a Translator/MAF but you have to have the Powerlogger and be willing to learn how to tune it. I assume you have a TT E85 chip burned for the 120s so you do have some adjustability there but not like what you would be doing with the SD2. Either way you could increase the size/volume of your intake pipe which would certainly not be a bad thing. Since you have a TTA it may be harder to find a correctly fitting 3.5" or 4" pipe. Hose might be an option. What are you running for a turbo?

 

[TT/Ameasap]

A stock screen is 1.5sq.''
Do you want a pic too?

 

[Jerryl]

A stock screen is 1.5sq.''
Do you want a pic too?

No, thanks for sharing the info.

 

[Howling Mad]

He's a somewhat on topic question. What's the fastest pass with a stock maf sensor?

 

[bpman1234]

like.