Waste Gate On Standard Manifold Vs Waste Gate On Turbo

[r34unit]

Lol

I should put a more detail description of what I mean.

I'm thinking of mounting my gate 90 degrees of the manifold so it's right above the rear housing. Running parallel 3 cms or so above the housing.

Edited August 10, 2014 by r34unit

[scotty nm35]

With enough heat shielding it will be fine. My Turbosmart is mounted closer than that, but I wrapped thick fiberglass around the diaphragm housing to protect it.

More critical is the entry angle to the gate off the manifold/housing. It can't be at a 90 degree, 45 or less.

[r34unit]

Is it just me or is the skyline flange on the standard manifold bigger than t3.

Did they increase the size to allow for the center divider ?

Above is the standard gasket on a gt30 rear.

Above is the standard manifold with gasket.

My main concern is what do we do make the flow a smooth transition ?

[Ben C34]

I have a tapered Spacer.

[AngryRB]

I had to check my GT30 housing as I found that hard to believe, I don't remember even checking with my last GT30, glad you mentioned it, that's unexpected.

[r34unit]

I cnc a flange

Will die grind smooth for better flow.

[CEF33Y]

Yeah i've found the same with the 3 aftermarket turbo installs i've done on stock manifolds.

Checked my current OP6 highflow (so stock rear housing flange entry point) and it was very close to the exhaust manifold opening.

The first one I did years ago was a KKR 430. It was shocking, honestly had a close to 10mm step.

[scotty nm35]

Why wouldn't you simply die grind the turbo inlet a little...

The stock flange isn't T3 so why would it be the same?

[r34unit]

That's the difference between the two flanges !

All smooth, it should make a nice flowing transition

[r34unit]

Best and cheapest place to buy gaskets in the Melbourne south east ?

[scotty nm35]

For T3? Autobarn?

Permaseal MLS

[discopotato03]

The Skyline pattern is more like Euro T4 , or what most call twin scroll T3 . It's wider than single outlet T3 to allow for the dividers width .

The bolt pattern is same as T3 buts any similarity with Garrett T3 turbos ends there . Everything else about the cartridge and housings is different except maybe the inlet air boss size .

Nissan did use T3 cartridges in 80s era engines like Z18ET FJ20ET L28ET RB30ET but Nissan provided the turbine housings which is why their dumps and IW outlets were different to Garretts own patterns .

Terrible turbos because they used the smaller diameter T3 series turbine and when you machined the housings out for larger ones it all turned to shit . The breakthrough came when Garrett developed the IW GT30 type turbine housings so everyone could use "bolt on" GT30R and GT35R turbos on their "T3" pattern std manifolds .

A .