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Blackgtr

BNR34 OEM ecu or power fc

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Hi, Ive had my GTR for a long time now. Its stock apart from a catback exhaust and high flow cat. It came with a boost controller set to 1bar and had an Impul remap ecu.

The first thing i did was install power fc and newer model hks evc tuned to stock boost for australian 98 vpower.

My main question is since I like the car in standard form and dont drive it except in my estate to keep it running once a week. Would the stock ecu be a better option with the factory tune and safety features? 

Are there any options for a remap? Or should i stick to the power fc and if i do, would it be wise to do a tune and dyno run since its been unchanged for over 5 years.

Any advice would be appreciated. 

-John 

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If you know a good tuner who knows PFC just get a safe tune. The Impul ecu was tuned in Japan for Japanese fuel - your PFC can be tuned to match the fuel you are buying .

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I would suggest that the usage model described means that you shouldn't bother doing anything.

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Leave it alone cause with your current power fc the car is tuned for the fuel it is using, Nissan tune these to suit the high octane Japanese fuel and engines tend to die over here because of it 

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5 hours ago, KiwiRS4T said:

If you know a good tuner who knows PFC just get a safe tune. The Impul ecu was tuned in Japan for Japanese fuel - your PFC can be tuned to match the fuel you are buying .

 

1 hour ago, r32-25t said:

Leave it alone cause with your current power fc the car is tuned for the fuel it is using, Nissan tune these to suit the high octane Japanese fuel and engines tend to die over here because of it 

Yes i did install the fc as soon as i got the car. I used octane booster and drove gently to be safe while i waited for the date of the tune.

I asked the tuner to run the car safe and i always watch the knock. 

Main thing id like to know is will the power fc current tune (since it was performed over 5 years ago) be optimal after years and maybe 6k kms? 

And if i put a stock ecu in, how good were they; can they run optimally for the small modifications like an aftermarket exhaust and the subsequent mild increase in boost. Things like knock retard and closed loop?

Thanks for the replies so far!

 

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The power fc will be fine even after this time, the stock ecu will generally cause detonation even at mild modification level in Australia 

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There is no reason for the car to be retuned unless you where never happy with the tune done.

I wouldn't go back to a stock untuned ecu. For what you're doing with your car, the power fc is sufficient and although they dont have many of the modern ecu features, they do their job of running an rb very well. Cheers.

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1 hour ago, r32-25t said:

The power fc will be fine even after this time, the stock ecu will generally cause detonation even at mild modification level in Australia 

 

1 hour ago, admS15 said:

There is no reason for the car to be retuned unless you where never happy with the tune done.

I wouldn't go back to a stock untuned ecu. For what you're doing with your car, the power fc is sufficient and although they dont have many of the modern ecu features, they do their job of running an rb very well. Cheers.

Thanks guys, the power fc while older gen is still popular and seems to do the job fine. I just wanted to clarify about the oem ecu.

Seeing modern cars have flash tunes on the factory ecu: from the r35 to even a falcon xr6 turbo; i was curious if any company flash the older gen bnr series ecu with good results. Ive heard of nistune.

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OK, let's be clear.  The Nissan ECUs of that era are (almost all) EEPROM based, so you can burn new EEPROMs and jam them in there.  But these days we just install a Nistune daughterboard which makes the ECU fully programmable.  Originally this was about as good as PowerFC + a little bit.  These days Nistune is much better even than that.

But you still don't need to be doing even that.

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On 3/17/2018 at 11:39 PM, GTSBoy said:

OK, let's be clear.  The Nissan ECUs of that era are (almost all) EEPROM based, so you can burn new EEPROMs and jam them in there.  But these days we just install a Nistune daughterboard which makes the ECU fully programmable.  Originally this was about as good as PowerFC + a little bit.  These days Nistune is much better even than that.

But you still don't need to be doing even that.

not on a r34 GTR ecu, no nistune support. i have a few jap ones here that are but its a big job and a pfc is cheaper as a tuned job.

 

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I had forgotten R34 GTRs were without a Nistune option.  Bit of a shit.

Nevertheless, it doesn't change the recommendation in this thread.  Do nothing. :D

 

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