Doesnt work that way, the Z32 MAF can meter more air, doesnt flow more.
Yes, bigger injectors can flow more fuel, but at the power levels of a NA VQ30 their not needed. The OEM injectors will flow enough just fine, some people actually run them on low boost setups and just raise fuel pressure.
Venturi effect huh? More like bottle neck. Get a PFTB and port match your intake manifold. Thats how you injest more air.




Exactly, thank you sir.

 

Read my mine too. I know there's a few to gain from advancing from trimming the fuel but.......

 

If you guys read the whole thread you would see we are talking about tuning here which is what the op was talking about. The Z32 is bigger in the sense of airflow it can meter. Of course they don't add power in and of themselves lol we are talking about tuning and what will give you bigger gains and injectors and the Z32 are exactly what im using for that. Port match lol? Thats another supporting mod if the engine cant use more air. More air plus more fuel equals more power assuming everything else is working right. I would expect you guys to know that. Acting like a Z32 MAF and Z32 injectors are some odd mod to do is ridiculous lol it one of the most common mods on numerous platforms

 

Here comes the Calvary.

I agree,

Z32 has a different voltage curve, so playing with that isn't as easy as making your own larger size (diameter) MAF, like in the links I provided.

OP has an advantage in that he already has an SAFCII and a WB, perfect for scaling his OEM MAF on a budget, safely, or as safely as one's common sense allows.

The stock 259cc injectors (stock pressure) should be fine for his needs.

 

O really? So, just "how much power" did you gain by using the z32 MAF and the 370cc injectors once you tuned since that is what your using?
Dyno results? Graph?
Using a larger TB and port matching the IM isnt going to increase airflow so greatly that you would need to get bigger injectors and the Z32 MAF. The oem items are suffice for tuning.
Yes, a lot of us are using larger injectors and the Z32 MAF, but its because we are at power levels that require them, Not vice versa. So yes its, its not an uncommon mod for high HP platforms, it is however for avergage HP na platforms.

 

I beg to differ. Do you have proof of this?

 

I actually started a thread a while back when I was new and was going to post all my graphs, installs, and reviews. Yea Im using it on a high HP platform with JWT cams, AEM FIC and a V2 being the big mods and my goals are about 275hp. Yes the stock MAF and injectors are fine but these stock injectors after 17 years now? Not exactly flowing the same now are they. Im speaking in the sense of tuning. Of course they don't add power in and of themselves and assuming thats what I meant is insulting.

 

I saw that thread, and it was full of fail.
So now your saying your boosted and cammed? If so thats a totally different scenario.
BTW, just how much boost are you making cause with a V2 and cams, 275whp is low. I made more then that with my V1 on stock cams using a JWT ecu which are known to have conservative tunes.
Post up the dyno graps and pics of your setup.

 

I dont wanna read the mumbo jumbo in this thread

but to answer the title of the thread:
http://forums.maxima.org/all-motor/3...ing-n00bs.html

 

Sorry bro.

 

My car is a DD so Im aiming for a low number that is safe. Ill post pictures when its done. The install date keeps getting pushed back and now I have to replace my steering rack and control arms. I was going to get the JWT ECU but the guy I bought the v2 from had so much trouble sending it back and forth getting it right that I decided on FIC and my tuner(lethal injection) loves it and is familiar with it. Early summer was the original goal lol. Now August maybe. Hopefully, who knows she is bein a bia right now.

EDIT: Im not sure what boost Im going to settle on but 8PSI has been thrown around possibly lower though. Like I said, 300whp and Im fine

 

So you havent done any of this, you have no real experience with this setup and what the results of such a setup would yeild.
Your posting what you "think" is ideal but really have no clue.

 

Actually Im 100% certain on what Im going to do my car but never mentioned what is an "ideal" set-up as every car is different. My car is just not ready to deal with another 100whp or more yet. Im not going to install it to hit big numbers for something to fail a few days after. Lethal has been really helpful as well as the guy I bought it from. Im essentially mirroring his set-up just with better tuning abilities. If your going to be an *** and criticize me then I don't really care to share my set-up with you anymore.

However, to get back on topic, The Z32 MAF and injectors are great tuning tools and "supporting mods" as you put it.

 

whoa, wasnt an issue missed here, that fuel pressure high, its actually 1 psi away from 3.5 levels. A 3.0 should be 35psi at idle and 42psi when wot I think that should be first place to start.

 

Once again, if your going to use those items for a boosted setup, then yes they are good "supporting mods" but not for an NA setup.
Im not trying to be an @ss, just trying to clear this up for others so that one doesnt read what your typed and go out and get some 370cc injectors and a Z32 MAF and expect to get better gains on their NA setup using them then their OEM equipment which will provide them with adequate performance.....even when tuning.

 

No they certainly wont help on those set-ups. I suppose I assume people are as serious about performance as I. Most people aren't, they want 20-30 more WHP and are satisfied

 

HP goals aside, you confused an FI set-up with an NA app.

 

The Z32 injectors can be taken advantage of on an N/A set-up and even higher output injectors if they are going to use a largely ethanol fuel. A lot more ethanol must be consumed so therefor a huge fuel pump and huge injectors are called for. But I digress

 

They can be taken advantage of to a certain point, after that, it's plain stupid or doesn't net any timing gain. And this C2H5OH madness has nothing to do with the subject at hand.

 

correct. Im using them for adjustability with the FIC but for most the combination is useless and a waste of money

 

I think you just need to start digging deeper and start modding. I can see you've done a lot of reading, but it's time to get your hands dirty.

 

yes, good supporting mod, very well put. As soon as i fix my **** idle i might consider a pftb but seems to be too much work for me... atm i just want to fix other things on the max.

well i figured out the stock maf is nearly 3" already so might go 3.5" but then i have to convert all intake piping to 3.5" :/ might not even want to do all of that lol

flava, are you saying if i put on a bigger maf with matching intake piping and tuned it i wouldn't gain anything? that much of a bottle neck effect? schmelly's running 3.5" (89mm) setup into a pftb (70mm) and he seems to like it... no? i'd be running 76mm into 62mm

i'm aware now that stock injectors are enough for quite a bit of n/a modding but with 00vi and soon to be full exhaust i chose de-k injectors, plus its the easier fitment of 00vi with the LIM.

 

talkin a bit outta my *** there lol. just using some logic... i tuned after 00vi and exhaust mods and noticed better pull on the butt dyno in the midrange, top was almost spot on but it wasn't a crazy big difference.

http://www.boostaholic.com/maxima/dyno/index.html dyno of stock vs y pipe and pop charger. sucks there's no afr graph but i'm guessing stock afrs are in 10s and 11s. also guessing the y and intake already leaned it out a bit to say 11 and perhaps low 12s. if you tuned to 13.5, you think you can get noticeably more hp out of that setup with a piggy back?

i'm not arguing i just don't see big gains from piggy back street tuning out of a y pipe back setup... at least based on my street tuning experience, which is only on 1 car lol.

 

measure stock maf and its 72mm and 3" is like 76mm. doesn't seem like that much of a difference but the dude in the link you posted noted very lean conditions (so apparently its a big diff? lol) and then he fixed it but there were no updates on if the car pulls harder

 

The Z32 can simply meter more air than the stock. Its not directly proportional to size its about the sensor itself

 

flava, i noticed your posts in this thread https://maxima.org/forums/4th-genera...ttle-body.html and you mention that you don't really feel the difference with the PFTB :/ what intake and maf setup where you running at that time?

 

i thought the sensor just senses lol. i was under the impression that if you put it into a bigger housing it'll sense more airflow... isn't that why people build bigger maf housings with their stock maf sensors?

with z32 maf wouldn't you have to mess with wiring? i don't think it just plugs in

 

The MAF tells the ecu how much air is coming in but the stock has a limit. The engine cant take advantage of more air unless the MAF can communicate with the ECU properly. The Z32 is Nissan as well so it integrates fine. The size of the housing does matter but you cant simply put the stock sensor in a 5in housing and it would measure thatmuch more. Its proportional to a ponit. Plus making a new housing is kinda difficult

 

Jesus.

 

And I think its 4pins if I recall and the turbo is 5? I might have that backwards though

 

 

makes sense, i wonder what that limit is... stock maf is 72mm and going to 76mm (3") so i don't think its that big of a difference. i don't mind making it, i bought a spare maf from the JY for $20 and i'm gonna make one when i have the time just to try it out once i get a proper intake setup.

lol

 

Good lord.

Stock is 12s, however stock 4th gen ecu with 00vi and de-k injectors are 10-11. When you say piggyback I'm going to assume you mean something like an EU or SMT-6 or 7, anything that can adjust ignition timing. The rest are all airflow and vtec controllers that I would not consider as piggy backs.
I know you can get more out of a piggy back with typical I/Y/E. I have personally seen an average improvement of .6 sec and 4 mph in the 1/4 mile from adjusting ignition timing alone. Something tells me that those kind of improvements equate to a little more than 5hp.
http://forums.maxima.org/newreply.ph...te=1&p=8487972
http://forums.maxima.org/7897928-post7.html
My experiences with the PFTB:
PFTB w/o porting = meh little more throttle responce at best.
PFTB w/ portmatching = oh nice. Not like y pipe, gains, but the butt dyno says some gains are there.

Hacking up the stock MAF is difficult. Making a new housing is not.

That's why you should send them to me and I'll make them

 

Why that? If the TB is 2.75 inches =( No need to put a larger MAF housing without swap the TB.

Regards!

 

too much n00b talk in here.

 

Dumb...

N/A WOT - 12.8-13.0 AFR