R33 With Gt3040

[Al]

Check you boost actuator; if it's soft or lazy it will be opening the internal gate too early, causing turbo to be laggy and not boost up properly.

I would personally take it to a mechanic that has a dyno and knows how to diagnose these issues.

*cough*

To set the actuator properly the hole on the actuator shaft should be about half a hole short from fitting on the gate pin. You then need to pull the arm so that the pin fits through the hole. This will provide the right preload/tension on the gate.

The std ecu normally runs pretty rich, so if you have a std 7psi actuator i would dare say it would be ok. If you do not have the money for an ecu and tune i would seriously find a w/shop doing a "dyno day", adjust the actuator just before going on the dyno and inform the tuner/mechanic of the situation and to keep an eye/ear out for a/f ratios and detonation. This way it will only cost you about $40-$50, instead of the $120+ w/shops may charge to do a single run.

All the best.

[Bond]

Another update.

After a tune from Dr drift my gt3040 starts making boost around 2200 and hits full boost (10psi) by around 2700rpm.

Very nice to drive now!

[R33GOD]

i told you

its an awesome turbo. i like to sell a car safe for its new owner

[Bond]

Yes you did.....cant wait to wind it up. Made 210rwkw on nearly 11psi

[R31Nismoid]

Only problem with the .68 etc is once you start to chase what the compressor is capable off (300rwkw)

You hit a wall probably around 250rwkw

[R33GOD]

because of the stock comp cover it will max out at 270-280rwk.

[R31Nismoid]

The rear housing is more of the restriction, not the front

VG30 machine jobbies always choke up

[Al]

The rear housing is more of the restriction, not the front

VG30 machine jobbies always choke up

Made over 270rwkw@16psi with mine, proven both on EAS and Racingline dyno's. My old one is now hanging off the side of a std NEO engine making over 270rwkw@16psi too. Any more boost was useless as that's about the limitations of this turbo.

Hardly a "choke up" though

[Bond]

I'm only aiming for around 250 for now.

[R31Nismoid]

Made over 270rwkw@16psi with mine, proven both on EAS and Racingline dyno's. My old one is now hanging off the side of a std NEO engine making over 270rwkw@16psi too. Any more boost was useless as that's about the limitations of this turbo.

Hardly a "choke up" though

If its @ a limit on 16psi, its choking.

the compressor of that combo is good for over 300

[Bond]

Hello all, I thought i would dig up an old thread.

Have since apgraded injectors AFM and have a blitz front mount and its currently making around 250rwkw on 15psi.

Anyway from other ppls results i have seen that with the 0.62 rear housing this turbo doesnt make much more after around 16psi which i'm nearly at. My question is it worth fitting an adjustable ex cam gear to this setup and getting a retune? I'm running the standard air box with a k&n filter and standard everything else.

Thanks again

James

PS: i did a search but most of the results were in regards to stock turbos. Thought mine might be a little different

Edited December 14, 2008 by Bond

[wolverine]

you should be able to make more power with an adjustable exh cam gear (assuming you are not talking a NEO RB25DET). at the very least you should be able to move the power curve around to where it helps you the most. you can make 5-10kw from midrange to top end.

[Bond]

Also i'm lead to beleive that my 0.62 rear housing is holding me back in regards to top end power (is there any way of testing which side is hiolding me backCan anything be done to get some more out of it or do i have to bite the bullet and upgrade to a 0.82 (or whatever it is).

Thanks

James

[Bond]

Anyone???????

[Tangles]

how did you go with the new Deatshwerks injectors i onsold to you?

all ok?

going the route of HKS AIC-4 and 2x 700cc sard injectors mounted externally on intake pipe

[Bond]

Injectors are great. They let me wind the boost up a great deal!

[wolverine]

check out what the mafia squeezed out of the 0.63 housing on his GT3076.

i am pretty sure you can make at least 270rwkw or thereabouts with the 0.63 housing.

the compressor will clearly flow more but it should make 250rwkw comfortably.

[Bond]

Yeah its making 250rwkw now so hopefully i can get a little more. What would it cost me to upgrade teh rear housing??

Edited December 15, 2008 by Bond

[wolverine]

$500-600 ish for the 0.82 housing.

[Tangles]

sure you dont want to add Tomei poncams and some head work

lol nah, cant comment on that ^ as I havent got my baby back yet, soon my pretties, soon ....

for a larger rear housing, turbo off/on etc, labour from shop, id say $600 to supply/replace rear housing?