Definitive Guide To Building 300-330awkw Gt-r

[Harey]

Great result!!! I dont think that power figure is too high considering your nice fresh engine with cams.

[J - Rad]

What was the problem?

[mico]

+1 why just say u fixed it without saying what was wrong ?

[Sinista32]

Appoligies for not expanding. Required a fair amount of Dyno time and eventually a new firmware upgrade from Haltech onto the Sports 2000.

I'll get a better explanation but apparently now my boost increases with my foot going down on the accelerator (Synced to RPM ???). So if it's halfway I'm running about 10-12psi and when its all the way down I run the current 18psi. Dont ask me how I'm not in the know but I will get a better explanation from my Tuner with some key Tuner speak that will explain.

Plus it's going all the way to 8250rpm where it's configured to cut out.

[91BNR32]

Little off topic, but part of my 300-320rwkw goal, is just to replace the Front pipes, I'm deciding between these 2.

http://www.ebay.com.au/itm/HKS-MILD-STEEL-FRONT-PIPE-NISSAN-SKYLINE-R32-GTR-/140681646997?pt=AU_Car_Parts_Accessories&hash=item20c1479395

http://www.ebay.com.au/itm/380339215174?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

The HKS one doesn't say anything about a direct replacment though. But it looks like it will bolt straight on, and half the price . will I really see any noticeable gain in power or flow? Do people replace the front pipes when there going for this 300-330 goal.

Cheers

[Piggaz]

But the HKS one is twin 60 mm into a 75.

[smithy85]

Also try the Trust/Greddy MX front pipes, they are listed at $608 on the GCG website (might even get them cheaper if you speak to Mark out there) and they are the same sIze as Apexi. I use them and they made a big difference to midrange even with the old standard turbos, so definitely go the bigger pipes.

If you are chasing 300+ then they need to be swapped out otherwise you will have a rather large exhaust restriction.

[91BNR32]

Thanks. it says it suits BNR32, so hopefully will bolt straight on. Has to be an improvement over the Stock front pipes

[smithy85]

Yeah if you stick with the big Jap name brands then you should be right with fitment.

Just avoid the Ebay-arrific 150 dollar jobs.

[91BNR32]

  On 18/01/2012 at 9:46 AM, smithy85 said:

Also try the Trust/Greddy MX front pipes, they are listed at $608 on the GCG website (might even get them cheaper if you speak to Mark out there) and they are the same sIze as Apexi. I use them and they made a big difference to midrange even with the old standard turbos, so definitely go the bigger pipes.

If you are chasing 300+ then they need to be swapped out otherwise you will have a rather large exhaust restriction.

Damn, now I gotta decide between Greddy & Apexi. On another note, could I change the stock dump pipes at the sametime? Like a swap in and out, or does this requite other stuff removed, turbo's out etc

Edited January 18, 2012 by 91BNR32

[smithy85]

Wouldn't even bother with dump pipes unless you are pulling the turbos out, a quick look under there will tell the story. The std turbos will run out of puff before the dumps.

Just stick with big front pipes and big hi flow cat until the turbos are swapped out, then change the dumps.

[levinboy]

  On 18/01/2012 at 9:47 AM, 91BNR32 said:

Thanks. it says it suits BNR32, so hopefully will bolt straight on. Has to be an improvement over the Stock front pipes

Is the exhaust std on the car??

Basically fit the biggest exhaust you can to free as much flow as possible

[Moodles2]

I had no idea HKS did front pipes in mild steel, I was 99% sure they only did stainless steel.

[smithy85]

  On 18/01/2012 at 12:34 PM, Moodles2 said:

I had no idea HKS did front pipes in mild steel, I was 99% sure they only did stainless steel.

I had the same thoughts, usually stainless and as much coin as the other brands... hmm.

[91BNR32]

  On 18/01/2012 at 12:28 PM, levinboy said:

Is the exhaust std on the car??

Basically fit the biggest exhaust you can to free as much flow as possible

Lucky I had a look under the car, it has some sort of custom front pipe with a built in decat pipe on it aswell. Weird.. looks like 2 x 65mm & 80mm out. I'd need to buy a front pipe & a high flow cat if I were to do a direct replacement. But yea better flow = better power.

[91BNR32]

Would it make sense to buy some Nismo AFM's to have a comfortable 300-320 rwkw? I know the Standard ones max out at about 300, is this safe though?

[Beelzebub89]

RB20 or RB25 ones will work aswell. If you have the standard airbox still it will require some holes redrilling but they will work fine and be more than enough for 300kws and cost a lot less.

[R31Nismoid]

  On 19/01/2012 at 10:33 PM, 91BNR32 said:

Would it make sense to buy some Nismo AFM's to have a comfortable 300-320 rwkw? I know the Standard ones max out at about 300, is this safe though?

no point buying AFMs or injectors for your goals. We've said it a few times already.

Both are fine for upto 300rwkw, you can make more, it just depends. Every set-up is different.

If it maxes out @ 290rwkw, so be it. For the $1400 it'll cost (AFM/Injectors) just to get 10-20rwkw...

Only you can decide if it's of any value to you. I'd say no.

Also buying 2nd hand AFMs is also wasted money. If they start to fail or play up, you end up buying new ones or chasing gremlins.

[nomnomv8]

Im still tossing up what setup to go for.

As it stands I’ve got a forged bottom end from when the engine received a fresh up and rebuild 1500km ago, Tomei Poncams (type B), 800cc injectors, Nismo fuel pump, PowerFC, Boost Controller, Nismo twin plate.

Ive got Tomei cam gears, Z32 AFM’s sitting on the shelf along with a 100mm thick intercooler as I had large HP aspirations for the car but I’m not sure that the trade off for lag would be worth it as the car is pretty much a street driven car. I had the HKS2530’s in mind as preference #1 followed by the 2860-5’s second behind but the -9’s are starting to entice me with the response benefits.

With my above mods what route would be best for my application?

[R31Nismoid]

Sell the cooler (use stock one, its fine), buy -9s

That's what you do if you want response/street car.

Otherwise do the other stuff and go for more power/lag. It's as simple as a choice.