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-   -   MAF Tuning?! (http://forum.e46fanatics.com/showthread.php?t=598345)

Rayce185 08-07-2008 02:30 PM

MAF Tuning?!
 
I read somewhere that removing the plastic fence in the MAF unit may bring benefits when installing an aftermarket air filter, since it optimizes air flow.

Troof? :confused: :hmm:

NightRunner 08-07-2008 02:39 PM

dont do it. you wont gain anything but ruining your sensor. its there to straighten the air flow over the sensor. taking it out only leads to bad.

Myth busted! its there for a reason other than eye-candy

Rayce185 08-07-2008 02:59 PM

Yeah, that's why I was wondering what FUBAR I read. I can't even remember where that was :rofl:

Thanks! :thumbsup:

TheRiddle 10-07-2008 01:26 PM

i remember that thread...

someone agreed someone not..

i removed the screens but honestly i think that it ws a placebo effect...

anyway take a read here...

http://forum.e46fanatics.com/showthr...threadid=38959

n2Bimmer 10-07-2008 03:54 PM

ive heard this too. but i dought it.

simsima325 10-07-2008 05:55 PM

A better trick would be figuring out how to run a larger 330 MAF on a 325. Good half inch diameter difference. Same with inlet tube.

mkodama 10-11-2008 01:40 AM

Yeah, doesn't provide much benefit and read it causes damage or incorrect readings to for the sensor. Also air resistance things like that only have a small benefit at higher RPMs and when you are at full throttle. No difference in the first half of your RPM range.

Quote:

Originally Posted by simsima325 (Post 8649146)
A better trick would be figuring out how to run a larger 330 MAF on a 325. Good half inch diameter difference. Same with inlet tube.

One step better would be the entire 330 intake and manifold. Most of the power increase of a 330 over 325 is solely from the intake and manifold.

If I remember correctly, the longer stroke 330 cranks provides 30% or the power increase and the 330 intake and manifold provide like 50%, and the rest is a few smaller things.

Bimmer Dude Xi 10-11-2008 03:10 AM

Quote:

Originally Posted by mkodama (Post 8669114)
Yeah, doesn't provide much benefit and read it causes damage or incorrect readings to for the sensor. Also air resistance things like that only have a small benefit at higher RPMs and when you are at full throttle. No difference in the first half of your RPM range.



One step better would be the entire 330 intake and manifold. Most of the power increase of a 330 over 325 is solely from the intake and manifold.

If I remember correctly, the longer stroke 330 cranks provides 30% or the power increase and the 330 intake and manifold provide like 50%, and the rest is a few smaller things.

So basically the 330 intake manifold has larger runners?
Will the 330 maf sensor connect into a 325?
Are throttle bodies the same? Or is the 330 have a larger bore?
What is exactly needed?

mkodama 10-23-2008 03:38 AM

Quote:

Originally Posted by Bimmer Dude Xi (Post 8669299)
So basically the 330 intake manifold has larger runners?
Will the 330 maf sensor connect into a 325?
Are throttle bodies the same? Or is the 330 have a larger bore?
What is exactly needed?

I'm not sure whether it is the design, length, diameters or what with the inatke runners. But I am pretty sure that the 330 has a larger diameter intake tube, MAF sensor, and throttle body. Also likely proper software is needed to make sure everything runs smoothly.

Rayce185 10-23-2008 06:51 AM

330 intake system retrofit DIY FTW :eeps:

n2Bimmer 12-22-2008 11:43 AM

So anyone do this, can you just sway the MAF sensor or what.

aggieE46 12-22-2008 03:56 PM

It's been done. Recently. Search around. I think wooboodoo did it.

Quote:

Originally Posted by Racing.Ray (Post 8740464)
330 intake system retrofit DIY FTW :eeps:


Rayce185 12-22-2008 04:00 PM

I need a DIY for a complete 330 intake system (including manifold) onto a 323... :eek:

n2Bimmer 12-22-2008 06:57 PM

i heard the gains are only on the low end and you losse high end power

GaffasCompact 12-28-2008 03:10 AM

Quote:

Originally Posted by Racing.Ray (Post 8346783)
I read somewhere that removing the plastic fence in the MAF unit may bring benefits when installing an aftermarket air filter, since it optimizes air flow.

Troof? :confused: :hmm:

well i own a e46 compact 320d, i have unpluged the maf and the car is running fine , its actually running better .only down sideto it is that the engine managment light appears on the dash.:idea:

paraklas 12-28-2008 03:17 AM

Quote:

Originally Posted by GaffasCompact (Post 9135575)
well i own a e46 compact 320d, i have unpluged the maf and the car is running fine , its actually running better .only down sideto it is that the engine managment light appears on the dash.:idea:

And your fuel consumption will increase too

muly 01-02-2009 07:34 PM

Quote:

Originally Posted by GaffasCompact (Post 9135575)
well i own a e46 compact 320d, i have unpluged the maf and the car is running fine , its actually running better .only down sideto it is that the engine managment light appears on the dash.:idea:

If the the car is running better with the maf disconnected, the car will be running in limp mode( pre set base map) and the maf is very likely broken hence why it runs better unplugged

sirch 01-03-2009 11:51 PM

Quote:

Originally Posted by NightRunner (Post 8346827)
dont do it. you wont gain anything but ruining your sensor. its there to straighten the air flow over the sensor. taking it out only leads to bad.

Myth busted! its there for a reason other than eye-candy

Most MAF are heat sensitive, the more the air flow the more they cool. If you remove the honeycomb to increase flow you will just increase the rate in which the wires in the MAF are cooled, thus reducing performance. In the past I have taken out my MAF and sanded it larger to make reduce the flow the MAF sees while increasing the air flow. The result was an increase in timing and a increase on the dyno, but I it is not as easy as it sounds and other areas need special attention to correctly tune the engine. In all, remove the honeycomb and you could lose performance.

GaffasCompact 01-04-2009 08:35 AM

it seems to have more power and run better frm stand still. normally from standstill it would b a bit lumpy

330i ZHP 01-04-2009 11:51 AM

this thread has a lot of interesting (and some bad) information going around


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