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Noob Questions With R34 Gtt

Fujiwara

By Fujiwara,
in Engines & Forced Induction

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Fujiwara Proficient

Fujiwara

Posted
Posted (edited)

Guys.

I am just about to purchase a imported R34 GTT.

Few questions. It has a catback, coilovers, oilcooler, boost controller and POD filter.

Do i require a ECU? or do RB25DET NEO's run ok with these mods?

Also, how much boost are these running in stock form and what can i (not going to yet) up the boost to without damaging my engine?

Is the gearbox weak in this model? How about the brakes? What is the most logical upgrade for the brakes?

And are knocking noises in the rear normal for cars with coilovers? Because all cars i drove with coilovers had these knocks in the rear :S

And lets say i do require a ECU and tune. Which ones are recommended for these cars?

I've been a WRX man and i'm new to the scene. Any help would be appreciated.

Edited by Fujiwara
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Birnie Veteran

Birnie

Posted
Posted

Welcome aboard and good luck with your new car. Nice choice :P

No ECU-upgrade required for those mods.

Boost on the stock ECU (if the same as the R33) is 5psi then after 4500rpm it goes to 7psi, and yes that is suppossed to happen on the standard ECU

Gearbox will be fine for mods up to 300rwkws and beyond.

Brakes are pretty good too. Easiest to change to slotted fronts and decent pads all 'round(Group Buy thread has slotted RDA rotors for really chep prices)

Most common ECU is the APEXi Power FC

I suggest you complete that exhasut and get it 3inch right thru from turbo.

Get the ECU and tune it on about 12 psi.

Nice powerfull 200rwkws pushing you back in the seat.

Won't need a FMIC for that power on the R34, apparently the Side Mount on the 34 is really good.

Andi Experienced

Andi

Posted
Posted

I would of tried searching for your answers in each different area. :P You would have eventually come up with the results.

1. Nope those mods should be fine with stock ECU.

2. Simply never run more then 12psi other wise you'll kill your stock turbo. Your turbo will run out of puff before your engine does.

3. Not that I know of? I'm pretty sure the box similar to the R33 GTS-T box which means it should be fairly well built and should be able to take a good thrashing.

4. Depends what you want to do? If its just a street car I say just get some decents pads with good fluid. The stock rotors are 310mm so are more then enough, front calipers are 4 pot as well. If you want to go a step further just get some braided lines and a master cylinder stopper.

5. Generally a lot of knocking and clunking means the coilovers are busted. Then again your suspension can be very stiff which results in a 'noisy' ride.

6. For simplicity, PFC is the way to go. Straight bolt in with a 20x20 ignition and fuel map. A bit hard to find now a days though.

DECIM8 Grand Master

DECIM8

Posted
Posted (edited)

Id say main mod you need is a S-AFC (by apexi) it controls the air flow and fuel mixtures .. about $400 bux new ..

Then you can boost it to dual stage 10psi/12psi (use lower boost on track obviously) and get a tune .. then your on the money :P

Side mount is good for 200rwkws and a little more .. with upping the boost with those mods you'll prob hit 200rwkws if you add a pod filter (apexi would be best) and a turbo back exhaust (twin dumps with high flow cat would be best)

so once u do that .. hit it up with a front mount, rims and a kit and you'll be riding in style

Edited by DECIM8
satanic Grand Master

satanic

Posted
Posted

Why would you bother with things like SAFCs when they are going to become useless as the modifcations go on... I personally would never advise anyone to go for a SAFC if they have "future" plans.

In order of upgrade:

Stage 1

Complete Exhaust (Split Dump, High Flow Cat)

Front Mount Intercooler

Bigger Fuel Pump

FPR

Stage 2

Bigger Turbo

Bigger Injectors

Camshafts

Full aftermarket ECU

Stage 3

R34GTR Brembo Brake Upgrade

Suspension Components

Birnie Veteran

Birnie

Posted
Posted
Damnit Birnie beat me. ;)

:P

And as far as the SAFC goes, i agree, don't bother.

I've owned both the SAFC-II and the PowerFc

The SAFC was a waste of money and time. It was intersting and a good learning experience but still i'd advise saving some extra cash and getting ANY full ECU

Fujiwara Proficient

Fujiwara

Posted
  • Author
Posted (edited)

WOW.

That was fast. Thanks for all the input~

And forgot to mention that it already has a FMIC.

Getting an inspection done tmr and if all goes well...then i buy.

Hopefully the coilovers aren't damaged...

And i was thinking the PFC...but yeah i knew that APEXi stopped making them...mayb bankrupt now as well...

And is there a short shifter (good one) available for these?

Cause it was pretty long.....

So many plans....bahhh~~~

Edited by Fujiwara

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