I read an article in AutoSpeed that diagrammed the creation of a second air intake that has its own air filter and tubing and bypasses the MAF en route to the throttle body. According to the authors, this setup draws more air into the engine by making the static air pressure on the engine side of the MAF to be half that of the static air pressure on the intake side. Since air flows from an area of high pressure to one of low pressure, that translates into more air getting to the engine.

They said that the MAF actually senses the extra air in the 2nd intake, and makes air/fuel adjustments as if all of the air was going through the MAF.

One thing I learned from the article is that the MAF is not measuring mass air flow all of the time. It actually takes samples of the incoming air on which to compute its measurements.

Has anyone seen that article, or done something similar to their suggested design?

 

Hmmmm.... I don't see how.

Define "all the time".
"takes samples of the....." Yeah, but what time interval. Terms are too loose/vague here.

Scan and post up please.

 

How would the ECU know that more air is coming into the IM? Last time I checked the MAF is what detects the amount of air coming in from the intake.

 

please post pics and artical

 

lean lean lean lean.

 

Howsaboutnoscott

1: You arent maxing out the MAF.
2: Even if this works its useless.
C: Dont waste your time.
4: Get a stand alone and run a MAP sensor if you want to bypass the MAF.

 

@ maxing out an A32 MAF w/minimal mods.

 

http://www.autospeed.com/cms/article.html?&A=2424


Listen, I'm just quoting the article. I don't write this stuff b/c I want to do it. Just looking for opinions.

IMHO, this didn't make any sense to me, either...

 

You didn't explain it very well. One must recalibrate the maf to accomodate the airflow. Much like using an oem maf sensor inside a bigger maf housing. Well probably exactly like that. The other problem seems to be that the recalibration isn't linear. So you have to mess with it all way up the rpm curves.
This is what you should have mentioned. To me, it looks like a SAFC but cheaper:
http://www.autospeed.com/A_2418/cms/article.html

 

ummm....... how, with telempathy, or its 6th sense?

 

Actually, what I should have done, and will do from now on, is just insert the link, and ask, "What do you make of this?"

 

wow, i feel bad for the guys that spent all this time to develop that product, that is an absolutely terrible idea. the thing that scares me the most is the line from the digital fuel adjuster link:

i don't get there logic behind this whole idea, once you hit the TB and manifold your airflow is going to be restricted again so your probably not going to see much gain. Its like thinking a CAI is going to give you significant HP gains. What about intake velocity??? and what about the second intake introducing a turbulent flow? what about the fact that 2 cone filters are not going to fit very well under most people's hoods?

If someone is that worried about airflow i think they should just invest in a supercharger/turbo kit and do it right.

 

Agree with your points made.

According to the author, (who seems to lack common sense) the purpose of his article was to provide a cheaper alternative to upgrading a stock MAF to one of larger diameter, which one might do when the HP of a modified engine exceeds the limit of the stock MAF.

One of the author's arguments was that larger MAF's are hard to find and expensive. Of course, this is very car-dependent, and probably not the case with getting MAF's from a 300ZX, given how often people put them into other Nissans, like the 240SX.

I would agree that just increasing the diameter of the MAF is not a simple way to increase the air/fuel mass because one would need to reprogram the ECU as well.

One statement that made me doubt the author's credibility is his suggestion to remove the protective screens at both ends of the MAF tube as a way to increase airflow.

Yeah, sure those screens are somewhat restrictive, but who the heck is going to risk exposing the fragile insides to potential damage just to get a little more flow? Talk about excessive cost...

This article would be better served as a suggestion for a science fair display than a practical mod.

But, that's the way this publication does things, with articles that seem to shout, "Lookey at what I can do!"

 

Actually those guys are pretty smart. Did you look at the rest of the stuff they make?