Jump to content
  • Welcome to SAU Community

    Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of SAU Community by signing in or creating an account.

    • Start new topics and reply to others
    • Subscribe to topics and forums to get email updates
    • Get your own profile page, build reputation and make new friends
    • Send personal messages to other members.
    • See fewer ads!

    Consider joining our newsletter for the latest content updates

    Click here to register


Recommended Posts

I have been really enjoying this site, lot's of good info. So I thought you guy may like to see some stuff I'm doing state side. We do not do a huge amount of RB stuff but, for some reason for the past month or so we have had 3 RB projects. Here it a "J" pipe I fabed for an R33 with a Internaly gated Garrett 3076R.

The jig I made to locate the factory DP location:

errb25jpipe4_full.jpg

errb25jpipe3_full.jpg

errb25jpipe2_full.jpg

The tacked up "J" pipe

errb25jpipe8_full.jpg

errb25jpipe9_full.jpg

errb25jpipe10_full.jpg

I expect someone will comment on the wastegate tube angle as it comes back into the “J”. I’m working on a better merge now. I also kicked the pipe closer to the block so it will work on left hand drive 240's

Edited by Overcenter

Share this post


Link to post
Share on other sites

Hi , good to see people fabricaring RB bit Stateside . Is that the ATP flange plate you used ?

Also what do you think of the idea of sectioning the waste gat vent pipe lengthwise (sort of sideways "U" shape) and welding it along the side of the main dump tube ? Possibly more compact .

Thoughts ? Cheers Adrian .

Share this post


Link to post
Share on other sites
Is that the ATP flange plate you used ?

Also what do you think of the idea of sectioning the waste gat vent pipe lengthwise (sort of sideways "U" shape) and welding it along the side of the main dump tube ? Possibly more compact .

Yep, its the ATP flange. I wanted to get the entery as far down stream as I could.

Thanks for the complements guys.

Edited by Overcenter

Share this post


Link to post
Share on other sites

looks the goods, maybe shortening the 2nd section of the WG pipe will allow you to move things up further to get a smoother integration of the WG gasses.

This is why we need a fabrication section on the forum

*looks at signature

Wink wink nudge nudge

Share this post


Link to post
Share on other sites

Very nice! Been thinking about building one myself, and now I got my inspiration back :woot:

*off to find me some flanges*

Edited by WilYawn

Share this post


Link to post
Share on other sites

excellent work. You americans and your bling stainless. Cant stand stainless pipework, looks the shit for a few months then the heat kills it, it goes grey, loses its strength and looks. But very nice fab work.

Share this post


Link to post
Share on other sites
excellent work. You americans and your bling stainless. Cant stand stainless pipework, looks the shit for a few months then the heat kills it, it goes grey, loses its strength and looks. But very nice fab work.

The cheap China stuff goes to hell fast. The Rath or Gibson 304L stuff we get here in the states fairs much better. Are drift cars 304L down pipes are still gold even after a season of abuse. On this years drift cars I'm staying with a 304L dump tube and 6061 T6 from the dump to the muffler. Time to shave some more weight out, I got last years S13 down to 2130 LBS.

Share this post


Link to post
Share on other sites

The thing I worry about with the ATP flange is that the wastegate "hole" is not flush with the actual housing. When the flapper is slightly open, it'll create huge turbulence as it backs up behind the "lip" of the flange.

Share this post


Link to post
Share on other sites
The thing I worry about with the ATP flange is that the wastegate "hole" is not flush with the actual housing. When the flapper is slightly open, it'll create huge turbulence as it backs up behind the "lip" of the flange.

My thoughts also..

However it 'may' be a good thing if the pressure within the scroll is blowing open the flap (boost drop), but bad if the wastegate is too small to pass the requried gas as not to creep boost.

Share this post


Link to post
Share on other sites
The cheap China stuff goes to hell fast. The Rath or Gibson 304L stuff we get here in the states fairs much better. Are drift cars 304L down pipes are still gold even after a season of abuse. On this years drift cars I'm staying with a 304L dump tube and 6061 T6 from the dump to the muffler. Time to shave some more weight out, I got last years S13 down to 2130 LBS.

T6 as in ally pipe. What wall thickness do you use also?

How does that fair? With all the bumps and shocks from drifting or racing, it doesnt bend or distort maybe crack?

Edited by r33_racer

Share this post


Link to post
Share on other sites
T6 as in ally pipe. What wall thickness do you use also?

How does that fair? With all the bumps and shocks from drifting or racing, it doesnt bend or distort maybe crack?

The aluminum holds up well, we even have a few guys that drive it on the street. On the drift cars I expect it to get busted up a bit more, unlike the drag, circuit and street cars. At $15 bucks a bend let it, I just do not care its better than $45 per bend in 304L. I use .065” wall and like I said it holds up well

Also in regards to the ATP flange, yes it does cause turbulence. Any internally gated turbo is just a compromise.

Share this post


Link to post
Share on other sites

The XR6T 4ltr Ford Blokes over here have issues with their GT3540 internal gates overboosting, another bloke on this forum with his gt3540 int gate also has issues with over boosting on his 3ltr.

Creating more turbulence at the wastegate is only going to make boost creep worse, they need all the help they can get not to overboost, seperate wastegate pipe with a smooth merge. That being said I haven't seen the XR6T blokes running with split dumps, rather just the usual open mouth so possibly that is half the problem.

Have you enlarged the wastegate hole at all?

Share this post


Link to post
Share on other sites
looks the goods, maybe shortening the 2nd section of the WG pipe will allow you to move things up further to get a smoother integration of the WG gasses.

This is why we need a fabrication section on the forum

*looks at signature

Wink wink nudge nudge

hmmmm. :happy:

Share this post


Link to post
Share on other sites

also. just out of curiosity. whats 304 or 316 stainless tube bends go for in the u s of a?

Share this post


Link to post
Share on other sites
The XR6T 4ltr Ford Blokes over here have issues with their GT3540 internal gates overboosting, another bloke on this forum with his gt3540 int gate also has issues with over boosting on his 3ltr.

Creating more turbulence at the wastegate is only going to make boost creep worse, they need all the help they can get not to overboost, seperate wastegate pipe with a smooth merge. That being said I haven't seen the XR6T blokes running with split dumps, rather just the usual open mouth so possibly that is half the problem.

Have you enlarged the wastegate hole at all?

Well, to try to combat the turbulence created down stream where the wastegate enters I left a .250 lip along the leading edge of the pipe. This will create a low pressure area across the mouth of the wastegate pipe and help with the turbulence. He is only going to run 15-16 psi. At what boost level are the XR6T and running into issues? The wastegate hole has not been enlarged.

Honestly, I despise internally gated turbos, but it is a more cost effective alternative vs a new mani.

304 "L" bends range from $45-65 us, the 3" bend I used here was $55 retail and the 2" was $48 retail.

Edited by Overcenter

Share this post


Link to post
Share on other sites

cubes the ford xr6T overboosts due to the factory actuator's floggin out, seen it time and time again, overboost then misfire's cause it blows out the spark.

Share this post


Link to post
Share on other sites

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



×
×
  • Create New...