98MaXeDouT

iTrader: (6)

Taken from ViperVadim at NYCMaximas.org:


1995-1999 Maximas: VQ30DE - A32
MAF Voltage Range: (0 - 4.2Volts)
Nissan Part Number: 22680-31U05
MAF Plug Color/Pin Info:

1990-96 300XZ Twin Turbo: VG30DETT - Z32
MAF Voltage Range: (0-5.2V)
Nissan Part Number: 22680-30P00

As you can see the voltage range is higher for the 300zx...check below


That's Great MAF Voltage is Key.. So What??

So let's say you have a Supercharger installed (10psi). Air is pressurized when it leaves the blower to the Throttle body. The MAF still works the same, except there is much more Air Flow, and the MAF needs much more voltage to account for the increase. At this point the Airflow Limit, or maximum MAF voltage can be easily reached. At the MAF limit, the ECU will not be able to make the right corrections to the Air/Fuel ratio and your car will be running bad (in upper RPMs). WE DO NOT WANT THIS!! If there is too much air, (and not enough fuel) a lean condition can cause detonation, and that leads to a blown motor.

Have No Fear, the Z32 (300ZXTT) MAF is here

Since the stock MAF cannot handle more than 300hp, reaching its limit, a MAF with a more useable voltage range is needed, especially if you are running serious SCd Boost, or a Turbo. Enter Z32 MAF (90-96 300ZXTT, the same one is also used in the Infinity J30, and various JDM SR20DET S13,S14,S15 Silvias, same nissan part number). The Z32 MAF is used on a Twin Turbo motor and provides a higher voltage range (0 - 5.3 Volts) The limit of the Z32 MAF is something like 500-600hp. Installing a Z32 MAF on a Boosted Maxima will help with air/fuel correction in the higher RPMs, and when there is added boost (+ more fuel, with upgraded injectors)


I think you may have to spring for the Z32....but discuss anyway...

95BLKMAX

iTrader: (10)

Oh wow! Thats some damn good info i was not aware of. I always assumed Z32 and A32 had the same voltage range. o0o0o0o.

You know now that I think of it, this was never an issue to us that rig the MAFs, since most of us that did it were doing it on an All Motor setup. Im still going to use it for this boosted setup. I think it would be worth to find out its worthiness/ usefulness with boost, and also find out where it would max out. If I do manage to max it out, I'll report back and it would be time to upgrade, lol.

Thank you!

95BLKMAX

iTrader: (10)

Progress Report for today...

Morning before work-
- Replaced SAFC-I with new SAFC-II

Evening after work-
- Fixed up the lines for the oil pump
- Cleaned up the trunk to make it look like a somewhat professional install, lol
- Removed front valve cover and drilled the driver side, threaded a barb at that end with silicone to seal it (I made sure to place it so that it doesnt drain into the baffle, but the top of the head itself)
- Signal for the BOV is done. Now I just need to rig one for the WG's reference- probably tee it off the source for the boost gauge

Tomorrow morning, run signal wire to the oil pump, rig up the oil restrictor for the feed line, then head on over for installation omg omg omg

NmexMAX

iTrader: (22)

95BLKMAX

iTrader: (10)

AAAAAAAAAAAAAAITE! Finished off all the last details, goin to the muffler shop as we speak :-D

MDeezy

iTrader: (27)

aww damn, cant wait!!

95BLKMAX

iTrader: (10)

b00000, got there too late, they close early on saturday. So now i gotta do it Monday morning, b0000!!!!!

W/e, gives me more time to fix a few things. Like the fact the restrictor should be AFTER the check valve and not before it, so I need a new fitting there, lol. Also gonna hook up a fuel gauge I borrowed to finally know for sure what my FP is at (its one full turn loser than 55psi, so i ASSume its ~45psi). Werd!

Since no turbo install got done, streetz took a few pix. I'll try to put em up tonite when i get back from work lil passed midnite.

streetzlegend

iTrader: (8)

dont forget to change return hose from 1/8th to half inch.

Here are the pics...
http://i218.photobucket.com/albums/c...DSC00005-1.jpg
http://i218.photobucket.com/albums/c...d/DSC00006.jpg
http://i218.photobucket.com/albums/c...d/DSC00007.jpg
http://i218.photobucket.com/albums/c...d/DSC00008.jpg
http://i218.photobucket.com/albums/c...d/DSC00009.jpg
http://i218.photobucket.com/albums/c...d/DSC00010.jpg
http://i218.photobucket.com/albums/c...DSC00012-1.jpg
http://i218.photobucket.com/albums/c...d/DSC00015.jpg

kzoosho

iTrader: (16)

Nice pics man. I hope you get it all on there come monday man.

t6378tp

iTrader: (69)

is it a good idea to have that rubber hose tie wrapped to the charge piping. not sure just how hot it will get

http://i218.photobucket.com/albums/c...d/DSC00009.jpg

95BLKMAX

iTrader: (10)

Yea thats something else I have to do. Where I actually have it tied to the charge pipe I have to isolate the hose somehow.

95BLKMAX

iTrader: (10)

Thanks streetz!!!!!!!

streetzlegend

iTrader: (8)

Yea i told him the same thing. cuz i remember one day coming home after a couple of runs, and felt the charge pipe, it was rather hot. so i suggested to get a larger diameter hose, cutting it and wrapping it over the return line to protect it.

MDeezy

iTrader: (27)

pics finally. freshness. where exactly is the turbo sitting again?

95BLKMAX

iTrader: (10)

FINALLY!!!!!

Ok, im super late for work, but just to make a long story short..... I pulled up the e-brake to spool it up and I went for it (about 25% throttle) and I saw 4psi bahahahah!!!!!!!

omg omg omg

Will provide more details when I get into the office, but for now, I am OFFICIALLY BOOSTING. I saw 4psi, heard turbo spool, and heard the BOV go off FTMFW!!!!!

grey99max

iTrader: (12)

.......... 95BLKMAX

gtr_rider

iTrader: (50)

if you at north, make a pass in the area..

95BLKMAX

iTrader: (10)

grey- Nissan>* werd!!!!

I must say that eventhough I saw 4psi somehow, I didnt get the full "feel" for it since I was going so slow and I managed that through brake-boosting. But for that second or two, oooooh boy. Felt like the car was "chained" and about to break the chain any second now, lol. It was so cooooool

Also, when I came up the parking garage ramps when I came to work, and I heard the turbo spool echoing all over the garage, bahahaha

streetzlegend

iTrader: (8)

buuahhahaha, thats what i was waiting for lol, the garage spooling echo. nice! i love goign up that isht. Btw, that was good way to test see if u got boost, but dont get used to doing that. puts alot of load on the engine, brake boosting. so dont do it again.. see u tonite.

95BLKMAX

iTrader: (10)

streeeeetz!!!!! time to go do a few tuning runs and take some pix!!! :-D

streetzlegend

iTrader: (8)

Brilliant pinkie!!! Cam is ready. Also opened my cutout in case we want to engage in some friendly runs, but i remembered i cant floor it lol. BOOOOOOOO. maybe, just MAYBE you'll be faster than me for once LOL. about gad damn time!

gtr_rider

iTrader: (50)

lol, i await disaster stories

95BLKMAX

iTrader: (10)

wow.... streetz did an ubber job with the tuning. I was FINALLY able to hit 100% throttle... wow its amazing, hahah

MDeezy

iTrader: (27)

that must have been a spectacular feeling. good job with the setup a minimal problems thus far. dyin for some dyno numbers/graph.

what a/fs did u tune towards? timing?

gtr_rider

iTrader: (50)

you dont say O_O

streetzlegend

iTrader: (8)

thanx, yea i must say, i did a great job with the tune lol. Basically its at mid-high 10's. We still need to fine tune, this was just like 15min's of tuning. part throttle and WOT.

The car feels great!! dont know if its faster than mine yet lol. but it def does pull very hard, spools up so fast, and its only at 4psi that we felt. its goign to be nuts

95BLKMAX

iTrader: (10)

What I love the most is how linearly boost came in and held to redline. Spools up super fast. The sound of the car is amazing. Deep gargle going into resonant pulses (gotta love headers), then turbo spool sound and its GONE!!!

gtr_rider

iTrader: (50)

branden - "wtf already"

djmikenova

ugh im jealous man cant wait for dyno day man!!! time to make me fast as well n we should take some piks man! wat says u blkmax and streetz

95BLKMAX

iTrader: (10)

Ok, gonna go outside and try to see if I can bang the spare tire well enough to make space for an air filter (running open inlet right now, lol. Sound is great, not a safe idea though)

absoundlab

if you dont mind removing the spare tire you can cut put the well and weld in a flat piece of thick sheet metal

95BLKMAX

iTrader: (10)

Nah Im not the type to drive with no spare. Spare is still there, just lop sided, LOL.

I raised the passenger side of the tire well by raising the car and dropping it down with a jack stand under the spots I wanted to raise. After a few of those I made enough room to stick the air filter in there. I also lifted the oil lines that were dangling in the back there, so basically, if driving behind me, you still cant see the turbo stuff. Gotta get down under the bumper's level to see it. Its pretty high up there so Im loving it.

Drove it around today to n from school.... I love boost, LOL My gas bills are crying though, LOL. that needle sure drops awfully fast, lol

streetzlegend

iTrader: (8)

bahahah, welcome to the boosted world homey! and yea, now that ur going to have a heavier foot, that needle is going to be on the floor more often lol. I could have a good MPG so far like at half tank and one day i decide to floor it real quick, there goes my damn fuel lol

95BLKMAX

iTrader: (10)

I did a ricer fly-by in front of nismology's house on my way back home, LOL. Then I came back again and launched it, LOL

nismology

iTrader: (8)

kzoosho

iTrader: (16)

Welcome to the boosted club.

meximax

iTrader: (19)

Hey Eddy, glad to hear you are finally boosting and tuned; welcome to the tractionless VQ35 boosted club....

I am sure that all that boost down low makes for some real fun driving. Now get a dyno and show us all up.

.

95BLKMAX

iTrader: (10)

yo, thats the plan for tomorrow .

I've been debating installing the boost controller today and turn it up to 6psi... but I opted not to. #1 I still dont have the IC installed (still sitting on the floor in my garage), and #2- I dont want to start turning it up before I verify on the dyno that everything is looking how it should be. So yea this first dyno is gonna be on just 4psi. But its all good, cus in a very short time its going to get turned up

98MaXeDouT

iTrader: (6)

Oh man Congrats bro....can't wait for those numbers.

Keep an eye on that MAF voltage!

95BLKMAX

iTrader: (10)

yea meng I been keeping an eye on it through means of the SAFC-II. The most I've seen on it is 76.6% (this is with MAF input of 04 like the stock MAF- having it at 02 for Z32 had me putting ALOT of correction, like -30%- -43% cor. Right now on the 04 Input its mostly at -10% at WOT. I'll have to go to the car and verify that. But at least at this boost level, 04 is working out just fine and so is the big MAF, lol. Lets see how it goes once I start turning up the boost).