Z32 AFM into GTS-T

[bbenny]

Hey i just want some info on this conversion as ive heard mixed arguments.

I have been told you can fit a Z32 AFM to a gtst to eliminate its boost cut. now i have been told this can also be done without tuning the ecu. just a matter of wiring it in.

the directions for wiring it in are this:

• wiring for Z32 Maf into GTS-T

Z32 terminals are lettered A Thru to F, total of six terminals of which 5 are used on the Z32 and 4 on the GTS-t.

Working from A upwards as follows:

A: do not use

B: connect to Black wire on GTS-T MAF loom

C: connect to black/silver

D: connect to white

E: connect to black with white tracer

F: do not use.

Enjoy............

Can this be done with standard computer without tuning ecu?

Has anyone tried it?

[Steve]

Hmm, well when I put on my Z32 I tried to run it without changing the setting in my ecu - idled like shit. Probably becuase the afm delivers different voltage for the same airflow.

As the voltage is different, say at 3000rpm and 50% load, the ecu is only recieving a signal that used to be associated 2500rpm @ 30% load, there fore your car will run very lean.

As far as I know, boost cut works on boost pressure, not air flow?

[Grim]

The AFM has nothing to do with boost cut. You can't run a Z32 AFM without an aftermarkt ECU for the reasons steve stated above.

[bbenny]

well i know you can run it into your ecu but need to get it tuned.

And the boost cut is due to the afm sending a "maxxed out" signal to the ecu.

but from what steve says maybe it cant be done without the ecu tuning...

[MRK25T]

I thought boost cut was different to the AFM maxing out?

When I hit boost cut the engine went into spasms but when maxing the AFM only the engine check light flashes.

Those instructions are from Meggala's web page. I sent them to Nathan for you last night.

Mark

[Steve]

bbenny, with the R33, boost cut (stock) is at 12psi, wierd.

[MRK25T]

he has a 32 steve

[Steve]

yeah, I know, I just think its wierd

[bbenny]

well the really wierd thing is that with std turbo i was running 1.1bar. with the 2530 it cuts out at 1bar. either its just creeping over 1.1bar and thats cut out or its just sending alot more air. i dunno.

I just wanna run more booooost!!!!!

I was going to get a fuel cut defender today but after reading the latest zoom article i think i want to steer away from the SAFCII and fuel cut defender. there is a great article on "sensor benders" the main problem is that by lowering afm signals the ecu will automatically advance ignition timing - and running high boost with highly advanced timing is looking for detonation.

so with a tuned ecu i can get bothe a/f ratios and ignition maps tuned correctly.

i figure as im aiming for 300rwhp its probably a safer move....

[Roy]

Cheapest thing to do is if your ECU is running the engine ok (std ECU right) with the exception of the boost cut, then plug my old ECU in and see.

If we swap std computer then im happy, i just want something that will run my car if i ever return it to stock, dont car if all the factory cuts are on it.

And i dont think the boost cut is related to the AFM being maxed out. There is a preset signal that when reached, will trigger the boost cut, but may be well before the AFM maxes out, i dont know... go to work with a willing passenger and a multi-meter.

[MRK25T]

My r33 hit boost cut before it maxed the AFM if that is any help

[bbenny]

yeah thanks for the diagram MRK25T.

Yeah i think i might give your ecu a try Roy if you dont mind.

if you could PM me your details that would be great thanks!

[justified2.4]

is the wiring the same for R33 GTS-t also, or is there wiring directions somewhere online?

Thanks

_Justin

[JimX]

I was going to get a fuel cut defender today but after reading the latest zoom article i think i want to steer away from the SAFCII and fuel cut defender. there is a great article on "sensor benders" the main problem is that by lowering afm signals the ecu will automatically advance ignition timing - and running high boost with highly advanced timing is looking for detonation.

so with a tuned ecu i can get bothe a/f ratios and ignition maps tuned correctly.

i figure as im aiming for 300rwhp its probably a safer move....

I haven't read that article but it sounds like a crock. The S-AFC will see a lower air flow and send less fuel through. How does it know to advance the timing? It thinks the car has less air going into it, and that's all. On my PowerFC, the ignition advances as revs (and therefore airflow) increase. If anything I would say it's not advancing the ignition enough!

Whatever the case, the tuner should be able to tune the S-AFC without any detonation. I haven't heard of a single person that had detonation issues after getting their S-AFC properly tuned. I think the guy that wrote the Zoom article doesn't know what he's on about. Did he mention any alternatives maybe? Like some Aussie built ECU replacements? Sponsorship potentially at work here.

You have an R32, forget the S-AFC anyway and just get your ECU remapped. Should cost around $600 or less.

[WLD747]

Best to get a SAFC when you put the Z32 installed!

[Steve]

If you have an R32, just get it remapped - cheaper than an SAFC.

I know a guy who ran a fuel cut defender on an RB20 cefiro, ran 1.3bar, and in that trim it was driven hard for 2 years without a problem, so I have trouble believing what is being said about fuel cut defenders.

[GTR-Ben]

There isn't even a boost cut on the RB20.

The only thing I ever use to run into was a speed cut even when the limiter was removed..

I could run as much boost as it could handle however without ever experiencing a cut.