What happens when the stock maf is maxed?

[1WheelWonder]

I was just wondering what exactly happens when the limits of the stock maf are exceeded. Any in put into this will be appreciated.

[Jookmasta]

when stock maf is maxed out, ecu will just start dumping fuel. couldnt say what happens to timing as i dont have an obd scanner.............maybe someone else can clarify the timing issue.

[Structure240sx]

i think timing stays the same, dont think i noticed much of a difference when i maxed out the z maf

but yes it will dump in all the fuel it has left

[Jookmasta]

hey out of curiosity, what hp level/boost level did u max out ur z maf with?

[1WheelWonder]

Excessive amounts of fuel is what I thought due to the nasty afrs I saw on the dyno. Thanks everyone.

[Structure240sx]

on my turbo it was hitting 5 volts at about 27-29psi

i was having a very minor spark issue which only let me make 521rwhp at the time. if the spark was fine then i prolly would have made 540-550rwhp

[Riubens]

hey 1wheel wonder,nice ka-t set up you have there, bro good to see a fellow alabamian into 240s i have 2 myself ,anyways i have the money to start my set up but have not meet anybody locally w/knowledge of ka-t or 240s by that matter that could give me more insight on were to start ,so any help would be apreciated,also did you instaled everything youreself?

thnx.

p.s dont flame me for geting out of topic please.

[Jookmasta]

did timing change with the z32 maf maxed out? sorry for the inquiries but as u well know, very few people can say they maxed out a z32 maf. lol.

[Chezedik]

Is it about the same for the N60 Maxima MAFS?

[Structure240sx]

im not too sure if the timing was changine when the maf was getting maxed out, if anything i would say it would retard it

either way its not the best to constantly run a maxed out maf sensor, just time to upgrade

[huguetpj]

Is it about the same for the N60 Maxima MAFS?

If I remember correctly the N60 MAF is calibrated to read up to around 250WHP, same as the SR or KA stock MAFs. It's just 3" big

[klattr1]

why is everyone thinking that maxing out a mafs will add fuel?

its actually the opposite. lets say you are at 5 volts airflow at 12 psi on a stock mafs. then you turn up the boost to 15 psi and it still only reads 5 volts airflow (since its capped). well the computer maintains the same fueling as before but in reality you have more air now (from upping the boost). so what does that get you?....leaner afrs.

[huguetpj]

Unless the ECU has some fail safe system above a certain MAF voltage (near the max designed output). I don't believe it would flood with gas but most likely cut spark or gas, as the speed limiter does. At least that's what I would have designed

[1WheelWonder]

I recently dynoed over the weekend and noticed that at 8.5/9psi at 261.49hp and 223.3 tq my afr's were pretty smooth, but at 12/13 psi at 287.86 and 282.45 my afr's never went leaner than about 11.8 but dipped down towards 10 high 9's. My afr bounced like this 3 times from 4000 to 6500rpms. I feel this was caused by the stock maf, what does everyone else think. It's not a tuning error on my behalf.

[Jookmasta]

what turbo are u running 1wheelwonder? also those numbers u mention were with 2 different maf's?

[1WheelWonder]

These runs were made with a Pulsar GTI-R t28 larger than the S15 t28 just not bb. These numbers were made on the stock maf, z32 maf should be in by Friday.

[1WheelWonder]

^flows more not bigger.

[1WheelWonder]

Riubens feel free to hit me up on aim (Sirlucious2foot)