z 32 afm

[geraldjohn]

hey guys,, i heard that changing your afm from the stock rb25det to the afm of the z32 may increase your horsepower, is that true? if any of you guys tried it i would love to hear the results cause i have one and would like to hear results b4 i install it also would they plug right in or would i have to re-wire the afm to fit into the rb's loom

[Craved]

you will have to rewire it, however it will only work if you have the apexi power FC

[geraldjohn]

hey thanx for the reply,, i dont have a power fc but what i have is a field hyper fuel controller i believe it does the same thing by way of altering the signal of the afm,,, is this what the power fc does? i am not too familiar with it

[darkhalf]

either that or if you get the RB25 rechipped (somehow) for the Z32 Voltage quantifier map then you wouldn't need an interceptor

[Craved]

basically from what ive seen the Z32 AFM has a greater range of output/signal and the power fc allows you to tune using this signal range!!!

do a search for more specific info!!!

[R31Nismoid]

yep... you can't just use it.

[geraldjohn]

point taken,, but tell me if i'm wrong, 1:- the field fuel controller reads the signals coming from the afm and then alters it a bit and sends it to the ecu so it ( the ecu) will adjust fuel accordingly,, on the controller i could have the car run rich or lean to my desire,, am i to assume the power fc does the same thing where the signal from the afm is concerned?

[R31Nismoid]

but it's the tpye of signal it's sending that causes the problem

[geraldjohn]

what do you mean by type of signal?

[geraldjohn]

and what sort of problen might i encounter?

[Warpspeed]

It is a waste of time.

The Z32 is the same size as the AFM you already have, so it is not going to increase power. It will read higher airflows though.

Putting a 300Kmh speedometer in your car is not going to make your car go any faster.

Fitting a flowmeter that can read higher airspeeds through the same sized hole is not going to increase airflow.

[geraldjohn]

thanx warpspeed,, well if that wont work,, what do you seggest?

[MSRB26]

The Z32 is used in most applications as the tuning resolution is better. As already said its the same diameter as already fitted to an RB25 so unless you have some form of adjustable engine management the power increase will be next to nothing......

[Warpspeed]

You have to find the power by other means, just changing the airflow meter and management to suit a different AFM is going to do nothing for you.

The only time fitting a Z32 is going to help is if your engine is already making more power, and the stock AFM has reached the maximum flow it can measure.

This will be when you are making about 220 rear wheel Kw or more. A Z32 will allow about 260 rear wheel Kw before you are in trouble again. A Q45 airflow meter is good up to about 300 rear wheel Kw.

Please try to understand the difference between making power, and the parts needed to support that power.

[franks]

Originally posted by Warpspeed

...This will be when you are making about 220 rear wheel Kw or more. A Z32 will allow about 260 rear wheel Kw before you are in trouble again. A Q45 airflow meter is good up to about 300 rear wheel Kw....

i have a problem with this statement. im making about 190rwkw and im maxing my afm out - according to my powerfc.

is this a dodgy tune, or is that 220rwkw in victorian speak

[geraldjohn]

point taken again,, thanx,,warpspeed it seems as though you have some experience in this field, so maybe you can share some insight, i would like to know what sort of power i might acieve on my engine the mods that i am about to install 1- blitz dsbc 2 field fuel controller, 3 - 3" exhaust (already installed with no cat) cold air intake 4- bosch adjustable fuel pressure regulator. i know in stock form the rb25 is about 250hp,, how much should i expect with these mods, all the parts are here already and its waiting on me to install them, do you think i might reach the 300 mark anyone?

[franks]

geraldjohn, from what i read your "power mods" consist of

- boost controller

- fuel controller

- exhaust (no cat ... tisk tisk!!!)

- CAI

depends how much boost you want to run, but i think you'd be expecting about ~175rwkw at around 1bar.

im at 190rwkw with a light powerfc tune, and i havent touched fuel pump or injectors...this is stage 2 i have powerfc, super intake, front mount, exhaust and avcr @ 1bar boost - hiflow cat too.

[benm]

Originally posted by franks

you'd be expecting about ~175rwkw at around 1bar.

Yup which is about ~235rwhp or approx ~275hp (flywheel) so no I dont think you'll make 300hp as you mentioned above.

[geraldjohn]

darn,so close and yet so far lol,,, but franks why the tisk tisk for no cat?

[franks]

well, in NSW, Australia no catalytic convertor would constitute a fine of around $10,000.00AUD - if the EPA catches you.

its also highly toxic for the environment. so thank-you for contributing to worlds pollution problems and ensuring my grandchildren have a lovely environment to live in