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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...