R32 GTR Tuning

[R32 Skyline]

Hey Guys,

I have an R32 GTR coming from Japan in the next couple of months.

I have a pair of N1 turbos I will be fitting to it and also putting 3" Front pipes with 3" cat back, twin air pods and 1 bar of boost. I have heard this kind of setup should be good for about 250rwkw.

Now Ive had yes and no answers to this question, but would you remap the ECU for this level of modification?

My thoughts were yes due to the different turbos being fitted and the change in loads on injectors, fuel, afr's etc etc. But some advise that it is not nessisary for less than 260rwkw... What are your thoughts?

[lazza]

Im in the process of doing exactly what you are planning, R32 N1 tubs, front pipes and hiflow cat etc etc. I bought an R32 ecu and dropped it off to a guy called Toshi (see business for sale section) and he is fitting a new chip to allow me to run more boost and more fuel.

Can anyone suggest what power I should be making??

Let me know how you go with yours when its complete!

Lawrence

[R32 Skyline]

I think you may squeeze a handful more rwkw

Prolly a little over 250rwkw

[GTRman1992]

I have a similar setup and have about 260rwkw, running 18psi boost and stock computer. The thing overfuels like crazy though at high RPM. More power easily available with tuning. If you are getting ECU work done make sure it is tuned on a dyno and not just plug and pray.

[R32 Skyline]

LOL Plug n pray, i like that... I would never do that, there are too many factors to consider defiantly on the dyno tuning is the way to go, GTRman1992, what turbos are you running?

N1's on 18psi would be asking the absolute maximum of them??

[GTRman1992]

They are the Group A Spec

[seeyagtr]

if you are chasing a new ecu I have a mines original ecu for $500. This ecu has been proof dynoed on STT Performance in perth and runs 18 psi sweet!!

[B0BB0]

my gtr has, a zorst, apexi pods, mines ecu, and a profec e-01 boost controller. it made 345.2hp at the wheels on 15psi. this was a dd shootout accredited dyno. thats bout 260kw. i dont think u guys need to run more that 15psi, for 260kw

[R32 Skyline]

yeah, i reckon your right BOBBO, i wont be wanting to run more than 1 bar...

i know N1s can tolerate 1.2bar, but no point stressing it for that little extra...

250rwkw will be enuff fun for now....

[GTRman1992]

I also agree, I think the extra boost I am running was negated by the over fueling. The dyno power curve is growing then it goes all lumpy and drops off etc. This happens about when the fuel ratio curve goes to over fuel. Once I get the fueling sorted I'm expecting to see a good power gain.

[pnblight]

ha the figures you are talking about are a walk in the park with a strong health rb26 ,but i would suggest not to waste time and money on remapping or chipping (or even mines)as for around $1200 dollars you can have one of the best computers on the market APEXI Power fc and hand controller from nengun/greenline, trust me by the time you play with the others and dyno costs you could of pay for one. Best bet is to find a tuner with data logger to do the orginal tune as it saves about 4 hours and on a dyno thats $$$ and if you deside to go further a few small investments in key areas and you can really bring the rb to life

mine has garrett bearing turbos 320hp (similar to n1 size)

rb20 afm($300 for both)

700cc sard injector($691)

tomei cams and cam gears($1050)

apexi pfc($1230) and avcr($600)

and i hand made exhaust and inlet

rest std

and made 518hp(18psi)

at about 11psi it still made well over 400hp

i was pretty happy with the return on money spent

[B0BB0]

The mines ecu has alot of fuel in it.

if i was going to modify the ecu or replace it, i will definetly go power fc. these are designed for the gtr. and cheap thru greenline/nengun. only reason i use a mines is because it came with the car.

u have to make sure u got a healthy 26 when u start pushing 400's.

i have attach my dyno sheet, if you guys wanted to have a look.