I got the new euro lowrider and they have a project sentra where they bolt on a stillen high flow filter. the 2001 sentra se has a larger plastic M.A.S with only one tube through it and a screen on one side. My 99 G20 has an aluminum M.A.S. with one medium hole and one small hole. does anybody have the 2001 infiniti or sentra and does it have the plastic M.A.S. and is it compatible with the 99. I know that the M.A.S. doesn't need to be upgraded till alot more HP than I have but from looking at the picture in Euro lowrider the 2001 should be alot less restrictive than mine and it has to be good for alittle HP or torque. If a CAI helps free up air then that would have to help a little.

I suspect that you are referring to a MAF (mass air flow) sensor and not a MAS ?

You would need to have your ECU reprogrammed if you change your MAF to anything other than stock. If you change your MAF at the same time as upgrading the ECU it should work fine however there are only marginal gains from a larger MAF on a nearly stock car.

Do you only want the change the MAF for the cosmetic appearence? If not you're really just wasting your money...

MASS AIR SENSOR. it is a factory piece just 2 years newer and it is more than twice the size iternally than mine that alone should increase air flow. so you were not much help but thanks anyway.

Arrogance is not needed. Perhaps you should listen to those more experienced in these matters. The correct terminology is Mass Air Flow. MAF sensor/meter are the most common references. Secondly, the newer MAF may work, but the only way it will is IF it provides the exact same voltage to the ECU for the exact same mass/vloume passing through it as your current MAF. If the voltages are different, then your ECU (the computer) will need programming to adapt the new MAF over. Not to mention that the connectors on the MAF are probably different as well. I have a bored factory MAF (aluminum) and it supports 280 whp (wheel horse power), so I think yours is adequate for flow and not worth the extra pain for the gain (if there is any).

And before you tell me I'm no help I have done 4 1.6 to 2.0 swaps, 2 DETS, and a DET ina 240 sx, oh and I have a turbo SR20 in a B12 Sentra. Hope this helped!
John

Thanks I didn't mean to sound Arrogant but I never seem to get what I'm looking for just opinions and criticisms.

I would like to find out if it is the same voltage and if the connectors are the same. the size is definetly bigger buy the picture and probably would lean out the motor a little, from what i've read HERE is what I want since we run rich @ WOT. I'm not looking for more fuel just more air.

Every body says that boring it won't make a difference then tell me why they put a big filter or cold air. ( to get more air in) if the hole in the maf is about 1-1/2" (from what I recall when doing my CAI) then why change to anything but that little tube thats on the factory intake. Won't it only be as strong as it's weakest link. A 3" Hot shot or place racing is pointless.

One more point if fipping the MAF 180* around is dyno proven to give a ft/lb or two than how does a larger hole not help.

I've gotten alot of info from the forum some useful and some useless but all in all I've learned a few things

Originally posted by Ericdd
MASS AIR SENSOR. it is a factory piece just 2 years newer and it is more than twice the size iternally than mine that alone should increase air flow. so you were not much help but thanks anyway.

I told you it wouldn't give you any significant gain but that wasn't enough for you? You need proof? Here you go tough guy...

From Compact Car April 1998 (http://www.se-r.net/about/200sx/scc/april98/april.html)

Air Flow Meter

In looking for other easy tweaks we turned our attention to the airflow meter. The airflow meter on an SR20 is the bottleneck of the induction system. Although the throttle body is a whopping 60mm (bigger than a 5.0 Mustang) the airflow meter necks down to a mere 50mm inside. It doesn't take a brain surgeon to look into the air flow meter and see a restriction. We decided the airflow meter was the next logical place to upgrade.

We purchased an airflow meter from a 95 Maxima to replace our wimpy stock meter. The Maxima's airflow meter is a huge 80mm, and doesn't neck down inside. We obtained a silicone reducer hose that necked from 3.25 inches to 2.5 inches, and then used a piece of 2.5 inch pipe and some hose clamps to fashion an adapter.

Of course, you can't just go swapping air flow meters and expect things to work. To run an airflow meter of this size it is necessary to reprogram the ECU. A larger airflow meter has a lower intake air velocity and develop less input voltage for a given flow. An airflow meter of this size is beyond the stock ECU's ability to compensate, thus making reprogramming a necessity.

Clark Steppler of JWT reprogrammed our ECU for the big Maxima airflow meter. In his experience, a bigger airflow meter is not necessary until more than 200 hp is produced. Steppler doubted that the airflow meter would give us a substantial, if any, increase, but we were convinced that the small was a restriction. While reprogramming our ECU, Clark also retarded the ignition timing slighlty. Since we increased our compression ratio while porting our head in the last installment, we noticed a little pinging during hot weather and while on the Dynojet. Since our Nissan has a knock sensor that aggressively retards timing when detonation is detected, we felt that elimination of the pinging might produce a little more horsepower. Steppler took some advance out of both the nitrous and normally aspirated timing maps, and our pinging was gone. After the reprogramming, Steppler hooked up JWT's Horiba air/fuel ratio analyzer to confirm the correct mixture. We tested the engine on JWT's Clayton chassis dyno, and tested the driveabilty on the street with the Horiba. After a few minor corrections, Clark perfected the program.

Driving home from JWT, Project SE-R had a little more low end punch, but did not seem quicker. To confirm the seat-of-the-pants judgment, we returned to DPR the next day to test the airflow meter on the Dynojet. Project SE-R put out about 1.5 more horsepower below 3000 rpm and none anywhere else. JWT was right again. For some reason the big airflow meter made more bottom end, the converse of what big usually gets you. We theorize that since the airflow meter did not neck down drastically like the stock airflow meter did, it acoustically lengthened the intake pipe, lowering it's resonant frequency, and improving a resonance-driven ram effect at low rpm.

Considering the cost of doing this conversion, we feel that it is not worth the effort and expense for a typical street engine. Since it didn't hurt power anywhere, though, we didn't bother to undo our work.

not trying to be "tough guy" just looking for a straight answer that tells me about a maxima MAF w/computer programed is that what I asked for . I'd like to find out about stock MAF but bigger hole for more air flow(basically bypassing the extra air to lean out mixture)

I believe they are talking about taking a larger MAF from a Maxima and replacing the one on a se-r. That should have answered your question. It tells you exactly what you will gain. If I got that you should be able to...

*Tip of the day: Sentences always end with a period.*

MAS and MAF are the same thing. The connectors between the '99 G20 and the '00 and '01 Sentra are different. You would need the plug, and have youe ECU reprogrammed for this to work. Would you gain anything? Maybe yes, maybe no. I'm leaning toward the no side. The stock MAF is good for 250 hp. I think its its good enough for a DET running 10 psi, its good enough for a 140whp car. That's what I tell people when they point out how small the MAF is. If you decide to swap it over, make sure you take pictures. You will be the first one.

eric96ser Thanks that is what I was looking for not everything else everybody has to give you when you ask a question.

Yes I knew what they were talking about with the maxima MAF but IS that the same as a 2001 sentra se (the question I asked) NO. I'm sorry I didn't use a period in my sentences I didn't know it would be UNREADABLE without one................... Now I might sound arrogant because I got plenty of info I didn't ask for but only one person That actually helped me.

Everyone is quick to jump on you but not many try to help.
Thanks again eric96ser for a staight answer.

to be honest, i think that CNibbana gave you the straightest answer...

he proved that it wouldn't give respectable gains, would cost more than its worth, and gave you references to back it up.
don't be so quick to accuse people on here as being unhelpful.

just my 2 unwelcome cents, its good that you are looking for other ways to get performance out of our cars, realize *** that everyone here isn't trying to shut you down at every step...


(and yes i know i don't capitalize my sentences, mr. grammar.)

Originally posted by Xsanity
(and yes i know i don't capitalize my sentences, mr. grammar.)

I was actually refering to ericdd not using periods or breaking up thoughts in anyway. Which you did. His post was semi unreadable to me. Had to read it a few times. Your fine.
I don't know if that was even directed to me but just so you know I'm a chick.

Originally posted by Chrissy


I was actually refering to ericdd not using periods or breaking up thoughts in anyway. Which you did. His post was semi unreadable to me. Had to read it a few times. Your fine.
I don't know if that was even directed to me but just so you know I'm a chick.


*smile*
i didn't even double check who had posted that, i was just playing anyways, sorry for messing up with the "mr." thing...