Heres a link to some pics of my MAF sensor.

http://www.primeragtp11.pwp.blueyonder.co.uk/mafx.html

As standard, its around 76mm bore anyways, so do i actually need a 300ZX TT MAF. Im gonna be running a T3/T04E setup with MSD 50lbs injectors, Aeromotive FPR, Walbro pump etc to have the capability to achieve near 300 BHP.

Am i right in saying that the G20's dont have this type of MAF as standard?

c'mon guys, someone must know. at least tell me wether or not the us MAF is the same size.

Most readers of this forum have much smaller MAF sensors than you and I do. P11s and B15s are blessed with HUGE MAF sensors; a few different models, but all are huge. For us in the US, JWT still doesn't know how any of these large new MAF sensors flow, so we can't simply plug them in to a JWT ECU and expect them to work. If you're using an external computer ("black box"), and not a JWT ECU, you should be just fine sticking with your stock sensor, though nobody really knows how much HP it's capable of. The GTi-R MAF sensor is good for over 300, and I'm certain it's more restrictive than our sensors, so 300 should be no problem at all.

thanks, maybe ill look into what other models of nissan my MAF is fitted to. Maybe i can get an idea of what power these are good for.

It's pretty much fruitless to look, I've tried. Our MAF sensors are an off-the-shelf Bosch part, but none of the cars they're fitted to are rated at over 240 CHP. The old-style, highly-restrictive, often-replaced MAF sensor flowed better than that. I'd be willing to bet that it flows enough for 325 WHP, and I'm all but absolutely certain that 300 is attainable (again, even a GTi-R sensor is smaller and more restrictive, yet can still hit 300).

Originally posted by CowboyDren
It's pretty much fruitless to look, I've tried. Our MAF sensors are an off-the-shelf Bosch part, but none of the cars they're fitted to are rated at over 240 CHP. The old-style, highly-restrictive, often-replaced MAF sensor flowed better than that. I'd be willing to bet that it flows enough for 325 WHP, and I'm all but absolutely certain that 300 is attainable (again, even a GTi-R sensor is smaller and more restrictive, yet can still hit 300).

Dren, can you provide us with a "table-like" info regarding the flow capabilities of MAF sensors for our cars?

Something like:
CAR B13 Sentra
ENGINE SR20DE
YEAR 1991
MAF dia. 45mm
PartNo. xxxxxx
HP capability 240

etc.

It would be very helpful and if there are parts of the table (like part #s) missing we could all chip in and make it a FAQ item.

Chris

ive crossed referenced the part number with Nissan, and this is what ive found. In the UK, the same MAF is fitted to the Primera 2.0 ltr Turbo diesel, Terrano, and the Almera GTi, none of which are BIG BHP cars. Ive been given an option of removing the hotwire sensor from the sensor and replacing it into a length of 4" tubing. Apparently, this is sometimes done on skylines to achieve massive BHP. It sounds a bit extreme, but it maybe something to look into if if doesnt produce anywhere near 300BHP.

P11 guy: Dude, don't sweat it. The sensor's good, trust me.

hpro: I did the research whilst unemployed, and did not save the specifics like part numbers. I know this, though; the "standard" SE-R MAF sensor (U12, U13, B13, B14, P10, early P11) is the smallest, and barely supports 240-ish WHP. Boring it out to ~53mm can do 290-ish. The N14/GTi-R sensor goes over 300. The B15, N16 (is that right?) and P11 sensor is a newer, more open design, and nearly 50% larger in diameter than the GTi-R sensor. It's not rocket science, folks.

fingers crossed, i hope you right, it would save some hassle. Ive been quoted stupid prices for a ZX TT MAF.

The size of the MAF has nothing to do with what it can flow. You should be looking for the voltage of the sensor. A GTIR MAF and a 91-99 2.0 MAF share the same size housing but the GTIR MAF can read more HP. Anyway if I was you I would get a 300zx MAF to use with the MSD 50lb injs. Anytime you go over the HP that you are looking for in the future there will be more down time for reprogaming again.

looks like im going shopping again

Originally posted by Andreas Miko
The size of the MAF has nothing to do with what it can flow. You should be looking for the voltage of the sensor. A GTIR MAF and a 91-99 2.0 MAF share the same size housing but the GTIR MAF can read more HP. Anyway if I was you I would get a 300zx MAF to use with the MSD 50lb injs. Anytime you go over the HP that you are looking for in the future there will be more down time for reprogaming again.
Andreas,

I thought that all the MAFs supply voltage from 0-5.12Volts and their ability to "read" more air was dependent on the size of the little hole that "houses" the hot-wire. Is this incorrect?

I am asking because I have seen calibration values for different MAFs and they all (those that I have seen) output up to 5.12V no matter what their HP rating is. And I would rather have a MAF and injectors as close to the max possible output of my engine rather than oversized such because of the reduced resolution (both in MAF and injectors) of the larger elements.

And unfortunately, where I libe the 300ZX was never imported so a 300ZX MAf will cost a hefty premium if I get it through Nissan. So any info regarding MAF abilities would be more than welcome!!!

I am mostly interested in the 250-300 HP area.

Chris

just incase it does make a difference, ive managed to track down a ZXTT MAF for the equivilant of $100 USD. I should get it in a few days.