concealer404

iTrader: (3)

They aren't relevant. That's the problem.

You want to do it right? Get a standalone ECU.

Hinano

So you are saying, both AFPR and bigger injectors will not increase fuel? And that a timing wheel is useless?

concealer404

iTrader: (3)

Do you have a way to make the AFPR and bigger injectors only work at certain RPMs and above? How about the timing wheel?

Leafy

iTrader: (1)

A complicated system of pulleys and leeevers.

Hinano

Yes, AFR at different rpm points is important, I do understand this. I guess I am trying to ask if a AFPR or bigger injectors can support a modest boost in flow from say a intake/VICS.

With the timing wheel, I am not sure at what rpms/load the ecu retards the timing how but considering the idea of only adding intake side modifications, would it be 'sufficient.'

Let me clarify ya'll.. I'm not looking for huge power but if I could spend lets say $50 on DIY intake, $250 for VICS, then 2 or 3 hundred to tweak fuel and timing to run decent(IF possible), it sounds like I can potentially see 10whp.. But maybe I'm wrong, but that's what I am trying to learn.

concealer404

iTrader: (3)

An AFPR and/or bigger injectors can certainly support a boost in flow from modifications.

Seefo

iTrader: (5)

What the **** is AFPR? are you talking about AFRs? or an FPR? You can't just combine two acronyms and call it a day.

Adjustable fuel pressure regulator to fix fudgy AFRs for more power...? Seriously, there is a lot of fail ideas here. This is not the MT cat way...

Hinano

Okay I'm sorry... My question should have been this,

Does, and if so, to what extent does adding a AFPR or bigger injectors to a NB2 w/stock ECU increase fuel?

18psi

iTrader: (76)

Yes.

But for the MILLIONTH TIME, that is all irrelevant if you're too stupid to understand that this FLOW needs CONTROL, and your OEM ECU, does NOT PROVIDE this CONTROL.

If you're gonna be dumb, you gotta spend more money trying to avoid what we're telling you and still end up with dog crap.

concealer404

iTrader: (3)

Anywhere from 1% increase to 1000% or more.

M.Adamovits

50+250+300=$600.

You're ready to spend $600 on mods that really aren't going to do much.

Buy a MS used on here, tune it once with everything stock, enjoy a very mild power bump.

But judging by the fact that you won't modify the exhaust, and are concerned modding the intake will be too loud, you won't be doing much of anything at all.

Hinano

I am unaware of how AFPR and or injectors change the amount of fuel injected. Scenturion made it sound like being at WOT changes something.

I realize that a X amount of increase fuel across the whole rpm band will mean that some areas will be more rich than others.

I understand that the NB2 runs pretty rich up top.

What I still don't know is if the AFPR or injectors run differently at open/closed loop and or if the amount of fuel is static rather than adjusted by whatever other condition.

Hinano

I'm researching and learning.

What about a rising rate fpr?

Also, where can I get some info on the functioning if the injectors?

M.Adamovits

Let me google that for you

Hinano

Let me convince you to help me Let me google that for you

Seefo

iTrader: (5)

what the **** do you want? Everyone has already told you, get a standalone or don't do this. Yet you are still talking about injectors...

The answer is in the thread, you just need to convince yourself to do it.

Hinano

How does open/closed loop work exactly?

How and why does AFR change in open/closed loop?

What affect will a rising rate FPR on a stock N/A NB2 have?

What affect will bigger injectors on a stock N/A NB2 have?

Leafy

iTrader: (1)

Computers

Computers

Aids

Aids

GO READ **** AND LEARN FOR YOURSELF.

18psi

iTrader: (76)

I'm almost positive he is just trolling

Seefo

iTrader: (5)

1) open/closed loop can be different. I think the general consensus is an open loop system doesn't use the o2 sensor to adjust AFRs anymore. Whether the MAF and/or other sensors are used is anybodies guess and probably dependent on application and manufacturer. It seems earlier testing would indicate the MAF is not being used and/or ECU doesn't fully compensate for additional airflow due to mods.

2) AFRs tend to get much richer vs closed loop. In closed loop the ECU will run you at/close to stoich. In open loop its some AFR value that is much richer than that. a stock miata might run below 12. if you run enough mods, it might run at 13? You could put a turbo on there, add no extra fuel and run at 17 if you like. I also heard that moving the injectors to the exhaust side has some cooling benefits.

3 & 4) I will look out for your for sale thread.

New rule. if you have more negative props than posts...BANNED!