185 AFM on 165? And FCD.

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185 AFM on 165? And FCD.

Postby MWP » Sun Feb 14, 2010 11:32 pm

Hi all,

I'm asking for a friend...

Will a 185 AFM work ok on a 165?

Also what type of FCD is needed for a 165?
Or can you just unplug the map sensor like on a 185?

Thanks!
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Re: 185 AFM on 165? And FCD.

Postby MWP » Mon Feb 15, 2010 11:12 am

Had a look at his car tonight... there is no MAP sensor ??

... so i gather it shouldnt have a boost cut at all?
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Re: 185 AFM on 165? And FCD.

Postby Mafix » Mon Feb 15, 2010 4:11 pm

in short no a 185 afm is different.
the lack of boost pressure sensor isn't a good thing. need to replace that too
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Re: 185 AFM on 165? And FCD.

Postby MWP » Mon Feb 15, 2010 11:29 pm

Why isnt it a good thing?

Its only used for boost cut and the dash gauge right?
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Re: 185 AFM on 165? And FCD.

Postby klue » Tue Feb 16, 2010 2:31 am

without it engine runs in safe mode.

AFMS are not interchangeable without modifications
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Re: 185 AFM on 165? And FCD.

Postby MXP_57 » Tue Feb 16, 2010 1:32 pm

Is your mates got a jdm st165 or engine?

The first jdm series of st165 (like mine) didn't have a turbo pressure sensor. The fuel cut is calculated based on the afm signal and air temp... so you cannot get around the fuel cut without changing to different ecu.
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Re: 185 AFM on 165? And FCD.

Postby MWP » Tue Feb 16, 2010 2:33 pm

MXP_57 wrote:The first jdm series of st165 (like mine) didn't have a turbo pressure sensor. The fuel cut is calculated based on the afm signal and air temp... so you cannot get around the fuel cut without changing to different ecu.


Ah ha, that makes sense.

Yes, it is a JDM 165 engine now installed in a 162.
I guess itll be a RRFPR and piggyback for him then to get around it.
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Re: 185 AFM on 165? And FCD.

Postby MXP_57 » Tue Feb 16, 2010 2:53 pm

No it will be waste of time.
Just convert to an st165 usdm ecu It just take a couple of wire to move/cut.
or st185 same (you can keep the st165 afm)
or st205 (best option) along with some 550cc injectors.

I've done all the conversion on my car. :D

Depends what you plan to do with the car.
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Re: 185 AFM on 165? And FCD.

Postby MXP_57 » Tue Feb 16, 2010 2:57 pm

also on the stock ecu you wont be able to boost much maybe 9 psi... depends on air temp and flow... it's really annoying and not always the same...
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Re: 185 AFM on 165? And FCD.

Postby MWP » Wed Feb 17, 2010 1:15 pm

Awesome, thanks for that info, ill let him know!

I have a spare 185 ECU and AFM, so maybe ill be able to sell those ;)
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Re: 185 AFM on 165? And FCD.

Postby MXP_57 » Wed Feb 17, 2010 3:01 pm

Also if you want to put the st185 ecu. you don't need anything.
For the pressure sensor, just feed the PIM pin of the st185 ecu with a voltage that doesn't go higher than fuel cut. (i think i spliced it on the water temp sensor.) you can check the voltage range in the BGB.

The turbo pressure sensor (tps) does not affect anything. It's just for fuel cut.
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Re: 185 AFM on 165? And FCD.

Postby MWP » Sat Feb 20, 2010 4:55 am

So he had a workshop install the 185 AFM with the 165 ECU, and tuned it (4hrs apparently on a dyno).
It was on a different dyno today for a power run (a club event)... it sat at under 9:1 AFR while on boost :bangshead:
Super rich, not happy.

So hes now considering the 185 AFM & ECU swap.

Any more details on what needs to be done to the loom?
Does the 165's loom plugs fit the ECU?
What pins need to be moved?

Thanks!!
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Re: 185 AFM on 165? And FCD.

Postby MXP_57 » Sun Feb 21, 2010 10:01 am

You did not need to swap the st185 afm. the st165 works with the st185 ecu...

You will need loom plugs. look in wreckers.

Look here: there is all the 3sgte ecus. http://st165turbo4wd.hp.infoseek.co.jp/ecu_pinouts.html
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Re: 185 AFM on 165? And FCD.

Postby MWP » Sun Feb 21, 2010 10:31 am

Thanks for that...
Will let you know how it goes.
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