Jump to content
SAU Community

Recommended Posts

It's time to buy the wastegate for the GT35R, the motor's a RB30DET using a power fc and boost controller.

The GT35R has a 0.82 exh, it's rated at 700 hp.

I'm using a high mount SS exh manifold suited for an external wastegate.

WIll the 38mm gate be ok or should I be using a 45mm one? :boinkcar:

Link to comment
https://www.sau.com.au/forums/topic/53393-which-wastegate-for-gt35r/
Share on other sites

It's time to buy the wastegate for the GT35R, the motor's a RB30DET using a power fc and boost controller.

The GT35R has a 0.82 exh, it's rated at 700 hp.

I'm using a high mount SS exh manifold suited for an external wastegate.

WIll the 38mm gate be ok or should I be using a 45mm one? :boinkcar:

Need to know a few more things before I can work out the wastegate size;

Is the engine capable of handling 700 bhp?

What boost level are you intending to run?

Will the engine handle that level of boost?

Need to know a few more things before I can work out the wastegate size

Engine hasn't been built yet but will be built to handle over 600hp.

Boost level would be no more than 25 psi, that's if it needs to go that high to achieve the power.

The engine is being built to withstand the psi and hp.

The bottom end will have forgies and after market rods, oringed block etc...

Engine hasn't been built yet but will be built to handle over 600hp.

Boost level would be no more than 25 psi, that's if it needs to go that high to achieve the power.

The engine is being built to withstand the psi and hp.

The bottom end will have forgies and after market rods, oringed block etc...

Hi Alf, sounds good, I will assume the turbo can be fully utilised;

700bhp / 11 X 19 / 25 = 48 mm

Hope that helps :P

Yes that helps alot Sydneykid, and thanks alot for your help.

The people who I have asked about this have suggested a turbosmart 45mm wastegate. So i guess there recommendations are very close to yours.

My exhaust manifold has 38mm piping for the wastegate, will this need to be replaced with 45/48mm piping?

Does anyone make a 48mm wastegate?

Thanks again. :wavey:

Yes that helps alot Sydneykid, and thanks alot for your help.

The people who I have asked about this have suggested a turbosmart 45mm wastegate. So i guess there recommendations are very close to yours.

My exhaust manifold has 38mm piping for the wastegate, will this need to be replaced with 45/48mm piping?

Does anyone make a 48mm wastegate?

Thanks again. :wavey:

Tial make 46 mm and 50 mm, HKS have 3 types of 50mm, Greddy have 2 types of 47 mm, Garrett have 46 mm and a few more that I can't remember.;)

Yes turbosmart's new pro-gate wastegates are now 48mm they use to be 45mm.

has anyone actually measured the valve area?

I think they are still 45mm, not 48. Going by what i saw.

But then, it might have been the old gate, in the new box :confused:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Impossible to remove the housing while turbo is installed on the manifold on the engine. So I have to do it anyways. I plugged it so there will not be any debris in there. Will vacuum aswell 
    • would a r34 gtr hood line up with gt/gtt stock fenders? after latch, front bumper and hinges are swapped for gtr ones? or would the fenders be too low or high in relation to the hood surface? ( I believe seeing somewhere that gtr front fenders use some type of riser for the sides, but do not know how that relates to stock gt/gtt fenders.)    
    • You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • Damn that was hilarious, and a bit embarrassing for skylines in general 😂 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
×
×
  • Create New...