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Fmic On R32 Gts-t, What Other Supporting Modds For It?

335

By 335,
in Engines & Forced Induction

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335 Rising Star

335

Posted
Posted

Hello

I have my first FMIC that I am going to fit onto my car.

I have stock turbo, Twin front pipe, stock cat, 3 in exhaust from cat back, and a pod. I have a RB25 turbo that I have not put on yet.

What other supporting mods should I put on now that I have a FMIC. I will buy a boost controller soon to up the boost.

Help please

XRATED Veteran

XRATED

Posted
Posted
Why do I need a computer for this? Why do I need the bigger fuel pump? More fuel?

Standard fuel pumps are known to fail. It's cheap insurance.

If you upgrade to the rb25 turbo, keep the boost low untill you get it on a dyno.

Once you up the boost, you may need some GTR injectors a Z32 AFM and a programable ecu such as a nistune.

Or you can just leave the stock turbo on and enjoy it for what it is.

Cheers

Justin

paulr33 Grand Master

paulr33

Posted
Posted

you dont have to but if you want the most out of it and you want to tune out the throttle response that you loose when you fit the FMIC, the piggyback (or remap) will let you do that. the fuel pump is a good insurance plan as its likely the stock one wont keep up with the required flow rate

bubba Grand Master

bubba

Posted
Posted

Fuel pump is a must, don't want a dying old one to cost you an engine! I'm a fan of 044's mounted in tank and know personally of such a set up supporting over 500rwhp.

When I had my RB20, the stock ECU handled 14psi through the stock turbo and 12psi through the RB25 turbo, after looking at the stock maps they are more tolerant than 33gtst's but not as tolerant as 34gtt's. You're looking at somewhere around 250rwhp untuned and probably a fair bit more after a tune.

NIStune is also (IMO) your best option for management.

ARTZ Grand Master

ARTZ

Posted
Posted (edited)

yeah i would of got a new fuel pump before i spent money on an intercooler..Fuel pump and a boost T, run it at 10-14psi, whatever works best, would of been more powerful and still responsive..

Edited by Arthur T3
335 Rising Star

335

Posted
  • Author
Posted
yeah i would of got a new fuel pump before i spent money on an intercooler..Fuel pump and a boost T, run it at 10-14psi, whatever works best, would of been more powerful and still responsive..

So I need a bigger fuel pump if I up the boost on the stock turbo. A Nistune or piggy back will give me the most out of it.

If I upgrade to a Rb25 turbo than I might have to have bigger injectors and a Z32 afm?

If I only up the boost on the 20 turbo, how much HP can I expect without a tune?

Where can I get a Nistune? I live in Japan but if is easier to order it from Australia, than I will.

bubba Grand Master

bubba

Posted
Posted
So I need a bigger fuel pump if I up the boost on the stock turbo. A Nistune or piggy back will give me the most out of it.

If I upgrade to a Rb25 turbo than I might have to have bigger injectors and a Z32 afm?

If I only up the boost on the 20 turbo, how much HP can I expect without a tune?

Where can I get a Nistune? I live in Japan but if is easier to order it from Australia, than I will.

Upgrading to an RB25 turbo won't need bigger injectors or afm.

On stock RB20 turbo mine was making ~200rwhp on 14psi untuned.

http://www.nistune.com/ but seeing that you're in Japan there should be a multitude of tuners that can remap the RB20 ECU!

Marcus89 Proficient

Marcus89

Posted
Posted
When I had my RB20, the stock ECU handled 14psi through the stock turbo and 12psi through the RB25 turbo, after looking at the stock maps they are more tolerant than 33gtst's but not as tolerant as 34gtt's. You're looking at somewhere around 250rwhp untuned and probably a fair bit more after a tune.

What you mean by that? The r34 stock ecu sucks a fat one when it comes to upping the boost it just dumps tons of fuel in the motor

bubba Grand Master

bubba

Posted
Posted
What you mean by that? The r34 stock ecu sucks a fat one when it comes to upping the boost it just dumps tons of fuel in the motor

The TP load limit values in the stock maps have a higher threshold up until about 5000rpm when it tapers down and is similar to R32 and R33. R32 handles more in the mid range than the R33.

If you're reaching the load limit, NIStune it already.

ARTZ Grand Master

ARTZ

Posted
Posted
So I need a bigger fuel pump if I up the boost on the stock turbo. A Nistune or piggy back will give me the most out of it.

If I upgrade to a Rb25 turbo than I might have to have bigger injectors and a Z32 afm?

If I only up the boost on the 20 turbo, how much HP can I expect without a tune?

Where can I get a Nistune? I live in Japan but if is easier to order it from Australia, than I will.

You dont NEED it, but every old car i have ever owned has benefited from a better fuel pump..

XRATED Veteran

XRATED

Posted
Posted (edited)
So I need a bigger fuel pump if I up the boost on the stock turbo. A Nistune or piggy back will give me the most out of it.

If I upgrade to a Rb25 turbo than I might have to have bigger injectors and a Z32 afm?

If I only up the boost on the 20 turbo, how much HP can I expect without a tune?

Where can I get a Nistune? I live in Japan but if is easier to order it from Australia, than I will.

Upgrade the fuel pump, there are plenty of drop in options (nismo/sard etc) or even a low km GTR fuel pump.

Put an adjustable fuel pressure regulator on and pump up the base pressure 8-10psi.

Put the rb25 turbo on (as long as it's in good condition).

Add a boost controller.

Replace the stock cat with a 'test' pipe... or bigger cat. Even a good condition GTR cat is good.

Have someone re-flash the stock ecu.... You will soon find out how much boost you can run untill you run out of available fuel delivery (injector duty cycle). For reliability I wouldn't run the rb25 turbo much more than 12psi anyway.

Nistune is a great option, but might be more than you need for simple upgrades. If your planning on more upgrades down the track, then it's perfect.

You'll also find you will need a new clutch.

Edited by XRATED
335 Rising Star

335

Posted
  • Author
Posted
Upgrade the fuel pump, there are plenty of drop in options (nismo/sard etc) or even a low km GTR fuel pump.

Put an adjustable fuel pressure regulator on and pump up the base pressure 8-10psi.

Put the rb25 turbo on (as long as it's in good condition).

Add a boost controller.

Replace the stock cat with a 'test' pipe... or bigger cat. Even a good condition GTR cat is good.

Have someone re-flash the stock ecu.... You will soon find out how much boost you can run untill you run out of available fuel delivery (injector duty cycle). For reliability I wouldn't run the rb25 turbo much more than 12psi anyway.

Nistune is a great option, but might be more than you need for simple upgrades. If your planning on more upgrades down the track, then it's perfect.

You'll also find you will need a new clutch.

Can I do the mods and flash the computer later?

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