DE-K done now thinking z32 MAF...

*DAVE Sz* · 08-12-2009, 09:35 PM

Been researching for a better part of the hour and still can't find just how lean my car will run with the z32 maf, a32 ecu, and de-k injectors.
Been driving the car around for almost 2 weeks and the gas mileage is just crap. Checking the VAFC and noticing that I'm under 7% throttle almost 90% of the time I thought about getting the z32 MAF. Not being able to tune closed loop with the VAFC also made the z32 maf look moar better. Of course hoping it doesn't lean out to dangerous levels. Most of the threads I found suggested against it but hose were mostly basic mod cars without bigger injectors. Seeing as I need a new maf anyway I was hoping someone had some insight. I PMed streetzlegend as he has/had z32 injectors and z32 maf in his car...

kzoosho · 08-12-2009, 10:03 PM

Well first off do you have a afpr and a wideband? If you do you can crude tune via fuel pressure in closed loop. This can correct any bit of lean you may have. I know others will say not to do it this way but o well. If you dont have a wideband i wouldnt suggest making the swap just yet.

Seeing you are local John knows how to get ahold of me also via aim or phone if you want help locally .

*DAVE Sz* · 08-12-2009, 10:25 PM

I do have a wideband. Was going to install it tomorrow. How much does a fpr run? If I can richen it with a fpr would I also be able to lean out my current setup foregoing the z32 maf? I'll ask John for the info if it comes to it.

kzoosho · 08-12-2009, 10:42 PM

Well you can richen or lean your setup via a fpr and i think my aem was 200ish. You can find them cheaper so dont go buy the first one lol. As i stated this is a crude way to tune but i have done it on a few cars with good results. I would install the wideband and see how lean you actually go first.

*DAVE Sz* · 08-12-2009, 10:49 PM

First I gotta install it and see how rich I am before I get the z maf and lean it out. I'll be pissed if currently the car isn't that rich and I'm still getting crap mpg.

**Kevlo911** · 08-13-2009, 07:03 AM

If it is super rich, you can run a custom 3" maf. You have to cut the sensor out of the stock one and put it in a 3" pipe. This also indirectly adds timing making the car feel more powerful

*DAVE Sz* · 08-13-2009, 09:36 AM

lolz, time to go buy some pvc. Damn FPRs are expensive....

*DAVE Sz* · 08-14-2009, 05:06 PM

How dangerous would it be to run 15.3afr on a daily basis, this is of course under idle and under cruising conditions...

*97Maximus* · 08-14-2009, 07:39 PM

Quote:

Originally Posted by Kevlo911

If it is super rich, you can run a custom 3" maf. You have to cut the sensor out of the stock one and put it in a 3" pipe. This also indirectly adds timing making the car feel more powerful

thats the case until you tune it.. still adds up top.. some claim increase in fuel economy.. i havent really noticed a whole lot.. but the extra power is nice

**Kevlo911** · 08-15-2009, 02:47 PM

Quote:

Originally Posted by DAVE Sz

How dangerous would it be to run 15.3afr on a daily basis, this is of course under idle and under cruising conditions...

It is fine. You will get better MPG. That is what I run my car at

I keep mine around 15.1 tho but it's not that different

I do get better MPG. I still get over 28mpg on the highway and I have some heavy *** wheels, extra sound damping, ect...

*DAVE Sz* · 08-15-2009, 03:55 PM

how lean can I go while still being safe? Not very important anymore as I might be coming into a AFPR that will solve most my afr problems but it would still be good to know. I read 15.5-15.7 and after that gas mileage goes down...

**Kevlo911** · 08-15-2009, 09:15 PM

Yeah that is what I have read. I have also read that 14.7 is more for emissions and the low 15 range is best MPG. But the only way we can tell if it is safe is an EGT. We would have to see the difference in exhaust temps to know for sure. That is why I keep it in the low 15's. I am scared to push it in the upper 15's because of high egt's

*DAVE Sz* · 08-16-2009, 08:10 PM

argh, some ****stain outbid me for a j30 MAF at the last second. Now gotta go back to the junkyard and hope they still have them...

**Kevlo911** · 08-16-2009, 08:15 PM

If you did the 3" maf and it is too lean, you can do the tape method to tune for now. You slowly start covering the hole on the maf where the element is. Grey99 has pics of this and it is a raw way of tuning. It will richen the car some

*DAVE Sz* · 08-16-2009, 08:30 PM

I'll do the PVC MAF if I have no luck at the junk yard...

scored one on ebay. Gotta get the connector now...

*DAVE Sz* · 08-17-2009, 02:54 PM

All the J30 mafs and connectors are gone from the junkyard. Anybody know if any other cars share the same connector? I saw that the sentras have the same shape/locking mechanics but are only 4 pin instead of 6 pin like the N62 maf. Was walking towards other nissan cars but it started raining. I'll try to just hack off the sides from the sentra connectors and see if they work for the time being...

dammit, 3rd gens gave the same maf connector as the z32? Now I'm ticked cause as I was getting to a 3rd gen, it started raining...

*DAVE Sz* · 08-17-2009, 07:36 PM

Another thing, the side of the N62 that the filter or air box screws into, is that different from the a32 or a33 maf? I tried putting on the 5th gen intake box on my car and saw it didn't line up with the JWT filter. Will I need an adapter or will it fit either of the 2?

**Kevlo911** · 08-17-2009, 07:39 PM

I believe the ZX maf adapter is different from the A32, but new holes can be drilled

*DAVE Sz* · 08-17-2009, 08:06 PM

figures, now need to find out about the 5th gen...

**Kevlo911** · 08-17-2009, 10:26 PM

The 5th gen adapter is pretty different from what I remember, the hole will not line up.

*DAVE Sz* · 08-19-2009, 08:57 PM

The maf fits 4th gen intakes perfectly, same bolt spacing. Kinda bummed about the 5th gen though, wanted to go back to the stock air box...

*DAVE Sz* · 08-22-2009, 10:06 AM

well, the z32 maf is a FAIL. ~17afr at idle, goes even higher when driving.