R33 Questions

[boostdef]

Hi guys, New to the r33 gtst, just need some things clarified.

Current mods are:

2 stage boost control (Currently on 10psi)

FMIC

3.5inch Exhaust with cannon.

Questions I have are:

1. What is a safe amount of extra boost to run on the stock fuel/ignition/ecu setup?

2. Can someone explain the ecu. Does it self tune to adust?

3. What are the next best performance modifications to consider?

4. Does not have a bov, what is the best sounding, and best for maintaining spool between gear changes?

Cheers guys!

[dezz]

Hi guys, New to the r33 gtst, just need some things clarified.

Current mods are:

2 stage boost control (Currently on 10psi)

FMIC

3.5inch Exhaust with cannon.

Questions I have are:

1. What is a safe amount of extra boost to run on the stock fuel/ignition/ecu setup?

2. Can someone explain the ecu. Does it self tune to adust?

3. What are the next best performance modifications to consider?

4. Does not have a bov, what is the best sounding, and best for maintaining spool between gear changes?

Cheers guys!

Safe amount of boost on the stock turbo - 12psi is pretty much as far as you want to go, and even thats taking a risk. Some people get lucky and it lasts ages, and sometimes it dies in no time...luck of the draw.

The ECU might not like going past 10psi, and it might go into boost cut etc....again, some do some dont.

Next mod for you would be some form of engine management...either standalone ECU such as the pfc if you can find 1 (they're discontinued for the 33 gts-t) or 1 of the alternatives. You could also go piggyback with an SAFC2 etc.

As for the BOV, the factory plumb back works fine. If you want a 'cool' sound you'll have to speak to people with different brands/types to find the 1 you want, but it may cause problems with stalling etc.

[boostdef]

Safe amount of boost on the stock turbo - 12psi is pretty much as far as you want to go, and even thats taking a risk. Some people get lucky and it lasts ages, and sometimes it dies in no time...luck of the draw.

The ECU might not like going past 10psi, and it might go into boost cut etc....again, some do some dont.

Next mod for you would be some form of engine management...either standalone ECU such as the pfc if you can find 1 (they're discontinued for the 33 gts-t) or 1 of the alternatives. You could also go piggyback with an SAFC2 etc.

As for the BOV, the factory plumb back works fine. If you want a 'cool' sound you'll have to speak to people with different brands/types to find the 1 you want, but it may cause problems with stalling etc.

Cheers Dez!!!

How far can the factory turbo go? And what are the compressor sizes on them?

What is the suggested replacement turbo? Plus, is a manifold upgrade worth it? To maybe a tuned length?

Of course this would be after some ecu/fuel upgrades.

All in time I suppose!

I have modified my turbo falcon with a wolf3d,inj, gt35/40 but was dissapointed with the decreased driveability it caused. Did reach 280rwkw though. Hope to match it with the 33.

[R31Nismoid]

Welcome to the forums.

Let me point you to a quick few links

1. The "bible" of SAU Forced Induction

http://www.skylinesaustralia.com/forums/Fo...ick-t66556.html

It contains many links like below

"First mods"

http://www.skylinesaustralia.com/forums/fi...-co-t45218.html

Also the "Dyno thread" is a great read

http://www.skylinesaustralia.com/forums/Rb...yno-t55845.html

Have a look at peoples mods, what power/response it attained and workout what suits you and what you want.

280rwkw isn't a cheap adventure, so you should do a lot more reading up on things before undertaking any serious modifications.

Lots of info on these forums about all power levels from stock to 500rwkw

[dezz]

Cheers Dez!!!

How far can the factory turbo go? And what are the compressor sizes on them?

What is the suggested replacement turbo? Plus, is a manifold upgrade worth it? To maybe a tuned length?

Of course this would be after some ecu/fuel upgrades.

All in time I suppose!

I have modified my turbo falcon with a wolf3d,inj, gt35/40 but was dissapointed with the decreased driveability it caused. Did reach 280rwkw though. Hope to match it with the 33.

I'll answer what I can...

The turbo, like I said 12psi is the suggested max, and it probably won't make any more power past 12psi anyway, just increase the risk of it failing....it could last 2 years on 12psi, it could last 2 minutes. Not sure on compressor size sorry.

Suggested replacement, thats kind of a broad question...there's a big selection of size/brand etc so it'll be up to what kind of power/response you're chasing.

I personally run a HKS GT-RS on my 33. Forged bottom end etc, standard manifold, the GT-RS is a direct bolt on. It'll max out at about 270-280rwkw with supporting mods, and is 1 of the more responsive turbo upgrades for the RB25DET.

[boostdef]

Thanks guys, appreciate it.