Air flow meter mod

[Dice]

I was flicking through an old issue of Zoom Magazine yesterday and I came across an article on Airflow meters. This particular mod described was for the R32 GTS-T. My question is, will it work on the R33 as well? Or has anyone had any success with it? OR even tried it?

This is it:

The calibration of the airflow meter can be changed by altering it's internal flow volume. Anything you do to the meter to make it flow more air will lean the air/fuel mixtures and add more ignition timing, while restricting the airflow meter will add fuel and retard timing. In the case of most Nissans that run overly rich in standard form, a simple and effective modification is to flick the wire mesh screens out from the meter with a screwdriver. The resulting change in flow area (the wire reduces the flow capability of the meter by at least 5%) adds a couple of degrees more timing and will lean the full load mistures by about half a ratio. Thats good for 3kW - 4kW at the rear wheels of a stock R32 GTSt.

[jimmy]

true mate, works a treat.

-jimmy

[Mase]

anybody else got anything to add on this at all? Any experience etc?

[riceline]

I have done this to my afm ages ago. Worked fine nothing blew up

[95GTST]

I read somewhere that the wire mesh was there to protect the AFM?

[EnricoPalazzo]

yes it is to protect anythin big gettin thru ur airfilter that could damage the afm. But aslong as u have a good airfilter, u should b aiight. Ive done this mod aswell, not sure if it did much.

[gtstii]

it's also there to strighten out the airflow as it passes over the hot wire sensor - not a worthwhile mod in my opinion

[sweetr33]

i have never heard of doing such a thing but....im up for anything. Dunno if i understand what to do though

[riceline]

gtstii How is it posibly there to "strighten out the airflow" - The air comes in and enters a cylinder its only going to go one way and bend a little around the wire.

Its only there to stop ppl with no idea of how to control there hands puting a screw driver throuhg it (or catch somthing that gets throuhg a cheap filter - why you would be using a cheap filter on a skyline i dont know)

[Guest Robo's]

Yes i dont know how it straightens out the air flow, and once its passes that, it gets stired up in the turbo then through the intercooler and pipes then to the butterfly then into the manifold!!! Surely wouldnt be straight by then?

[gtstii]

less turbulence in the air as it passes over the hot wire allows it to read the airflow more accurately

[gtstii]

read this:

http://www.automotivehelper.com/topic11657.htm

[nitemare5]

if mario says its bad, then it must be bad

[Guest Robo's]

Hmmmm, interesting, ohh well mines gone

[DJ984]

meh, 6 of one 1/2 a dozen of the other.... i'll leave mine there 'cause Mr Nissan put it there and he knows better than i do....

[gtstii]

the mesh will form a bit of a restriction, but that's its job as i understand. It is there to ensure that the airflow is evenly spread over the area of the AFM.

The hot wire element doesn't sense the airflow over the whole area of the AFM pipe so it reads it at the centre and i guess assumes this flow is even over the pipes area.

removing it may cause less of a restriction and give you maybe 1 - 2rwkw, but in the long run, i think you A/F ratio's will be less stable due to fluctuations in the AFM's ability to measure air coming into the engine.

make sense?

[DJ984]

I agree with what gtstii is saying here... 1-2 kw could be better gained by a good SOLID A/F ratio tune i reckon... rather than a fluctuating mod