Do i need a bigger Maf?

[Got2BeBoosted]

hello everybody I'm new on this forum and didn't see this question being asked anywhere so here it is. i have a RB20det skyline and here a lot of talk about people upgrading there mafs to the Z32 and Q45 and i had wondered when do i need to buy a bigger one on my car too make more power? i have heard that the RB20,25 one is good for about 303HP and the Z32 was good for around 341HP and supposedly the Q45 is good for about 404HP is this true? How do i know if i need to upgrade everyone tells me i should change it? My car seems to run fine at the moment. here are the mods what do you guys think??
Walbro 255 fuel pump
Turbo smart adjustable fuel pressure regulator
RB25detNeo T28 turbo
Yonaka 3'' front mount intercooler
HKS SSQV blow off valve
Mishimoto 2 core aluminium radiator
Mishimoto oil catch can
Splitfire coil packs
3.5 inch piped exhaust to jasma muffler
Screamer pipe off turbo
Greddy profec B spec 2 electronic boost controller set 14psi boost.
Autometer wideband A/F ratio gauge, boost gauge, water temp gauge
ACT 6 puck race clutch
Apexi pod intake
Bee-R rev limiter
Hyper tech tuned Ecu

[collector240sx]

Hi, the Z32 maf are actually good til about 450hp, form what I heard (might vary a little I guess), and the Q45 aldo a
little bigger in size has a smaller max hp, can't remember the number right now. Some also use ford maf (1 in the
ford lightning), good for 550 hp. You can also run dual maf to 1 intake pipe, and splice the wires together, the
computer take the average of the two, and it act has a much bigger maf. Not sure how this would affect the tuning,
might have to calibrate the computer to a setup like this, you might be able to get away with just scaling the maf if it
can be done, but will need a tune for sure. If you have look a a maf signal, you'll see it's not a linear signal.

An other way is to put something like the Z32 maf in a bigger tubing, which in turn make it think it's bigger. But, I have
not seen to many people use this or need to use this. Since a lot of people prefer to go map, before considering doing
this. There is probably a couple of other way (pretty sure at least one way) to trick the computer, that your maf is
bigger then it really is, while tuning, but that might cost has much in tuning time then a new Z32 maf unless you do your
own tuning.

For the price AMS is selling there (new) Z32 maf right now, I would very much consider it.
But it all comes down to if your going to NEED this now or down the road.
What is your hp goal, are your maf causing you problem ?

[nickdutch]

i have a z32 maf on my rb20 i and got it tuned for it works grate dont need it yet but if i make the power i want to down the rode it will come in handy rewiring the plug is the tuffest part then i just had a shop rescale the maf table

[Got2BeBoosted]

Im probably just looking too make about 300hp to the wheels not too much that I'm gonna break my rb20 but enough for drifting, i don't think there is anything going wrong with my maf yet. what exactly are the symptoms of a maf giving me problems? My car was spitting awhile back and seems to be gone now that i upgraded to a new set of coils and plugs with a good Gap.

[beacher1B0]

You are probably already on the last right column MAF table while full throttle on boost. I know i am and my mods are comparable to yours. Which means you are close to needing a bigger MAF. I think you would be able to tell when you need a bigger MAF when you start hitting ECU boost cut. Especially if/when u up your boost over 12 pounds.

I think the factory injectors are your power choke point at this point. Get some bigger injectors along with a bigger MAF. That way when u get it tuned to accomodate the new MAF u can get it tuned for the new injectors at the same time.

[Got2BeBoosted]

Yeah god idea thats most likely what i will be doing next after i decide which Ecu to run in my car...

[Skym]

RB20DET MAF is rated to around 300hp

Z32 MAF is rated to around 480hp

Ford Lightning MAF (from Ford Racing that's used for supercharged V8) is rated to around 700hp.

But those are only a rough guide as to when you should look at upgrading.

All 3 can be run with modified stock ECU (Nistune). Once Nistune board is installed inside stock ECU, it allows stock ECU to be retuned via consult cable, laptop, Nistune tuning software anytime you want or need to.

I would fit Z32 MAF + Z32 MAF plug + 550cc DeatschWerks injectors. Also a engine oilcooler + correct oil, as oil temps skyrocket when you push car and could cause turbo or engine failure due to oil failing.

DeatschWerks injectors -

http://www.deatschwerks.com/skyline/skyline-1989-94

[Got2BeBoosted]

Yeah well thats what i think I'm gonna be doing i already have boost controller though, cant decide if i wanna go with Nistune quite yet also thinking about greddy E manage ultimate.

[Skym]

E-manage intercepts what comes from stock ECU (signals) and modifies them. Good if there's no knock and ECU is not switching between main, knock maps.

Nistune updates stock ECU, so it can be reflashed like modern car stock ECU's. But tuning can be done in realtime. That means any changes to maps are instantly felt with engine on dyno. Not make changes, reflash to ECU and then check on dyno like modern car stock ECU's.

[Got2BeBoosted]

Oh really well definitely didn't know that about Nistune well that makes it seem a Lot better than and i know Nistune will be cheaper than the other even still.

[Skym]

I run Nistune in my car and so do many others on GTRC.

In videoclip below, the person shows you the updating of maps, tables at 2:00+ via laptop while RB20DET engine is running -

http://www.youtube.com/watch?v=J36MKYjL-fY

The old way of chipping stock ECU is obsolete years ago. Once Nistune is installed inside stock ECU, don't need to touch ECU again. All tuning is done via laptop, tuning software, Consult cable that's connected to grey plug (Consult plug) next to fuses under dash on drivers side of car. There's a little pull out access panel you remove (put hand in hole and pull on access panel to remove panel) to access the grey plug (Consult plug).

Nistune distributors -

http://www.nistune.com/ordering-distributors.php

Click on dropdown menu and select region (Canada).

Neat part is you don't need to retune ECU straight away, as uses the same maps, tables, etc that it does now if you download them to laptop and send to Nistune dealer who burns them to Nistune board before installing Nistune board in ECU.

[Got2BeBoosted]

is this the consult plug you are talking about the gray one that is behind my fuse panel found the picture on the internet.

[beacher1B0]

Yep. That little gray plug is the Nissan Consult Plug.

[Got2BeBoosted]

thats great hah Definitely thinking of getting nistune.

[Skym]

Yes, that's the Consult plug.

This PLMS cable you buy connects laptop to consult plug -

http://www.plmsdevelopments.com/images_rt/consult_cable.jpg

Need to install drivers for cable (has instructions). The light's on it tell you if it's connected and data is being transfered between laptop, ECU.