Krauthammer

I'll be starting the installation of a Twin Scroll T4 Borg Warner internal wastegate on my '97 NA. The idea started with the excellent behavior of the BW Twin Scroll in my Mini Cooper JCW which has no lag and is very small.

Anybody here has installed a twin scroll on a non-VVT engine and if so how did it come out? Having talked with the main players in the turbo kit manufacturing area I didn't find anybody interested in prototyping a kit for a 20+ year old engine.

So I'm left to my own resources, something not foreign to me going back to the first Ford Cardinal-Saab V4 turbo which I co-authored a very long time ago.

Any ideas will be much appreciated.

TurboTim

iTrader: (9)

Trackspeed Engineering.

ARTech Fabrication.

Drop off you car and a wad of cash to me in zip 08515.

Leafy

iTrader: (1)

Twin scroll, internal gate BW. This better be an efr. Custom manifold is going to be the way to go.

Krauthammer

Yes, maybe the EFR 6258. Thinking about positioning it downstream.

18psi

iTrader: (76)

efr6258 is available in twin scroll? news to me

Leafy

iTrader: (1)

Not yet anyways. The 7163 is the smallest to get a twin scroll turbine housing so far IIRC. IMO the 6258 and 6758 wont really benefit much from the extra complexity and weight required to make a twin scroll miata turbo manifold. I think with all the extra bends required to get the runners to the right spot on the collector at all the same length the tiny advantage you'd gain from being twinscroll would be lost in head loss.

Krauthammer

Exactly, which is why positioning it downstream may make sense.

sixshooter

iTrader: (12)

But you lose heat energy by positioning it further away.

Leafy

iTrader: (1)

And you cant really do a twin scroll from far away.

Krauthammer

^ and ^^ Not if you know how to increase the heat and maximize flow/pressure in the manifold. Just completed a test with excellent results.

Good thoughts I'd like to pursue but I better stop posting for today or I might get nuked as a noob.

Leafy

iTrader: (1)

You dont happen to own an 05STi as well do you?

18psi

iTrader: (76)

if you have some valid discussions to post up by all means keep going.

but seeing you make 3 threads within an hour none of which had much if any useful info or content definitely catches people's eye, considering your join date.

EO2K

iTrader: (37)

Isn't Fae running a twinscroll BORGWARNER S366? He's pretty much our resident ALLOFIT massively oversized turbo guy, you might want to look him up, I'm sure he can drop some knowledge on you

Leafy

iTrader: (1)

But its on a non-twin scroll manifold using a quick spool valve.

concealer404

iTrader: (3)

I can't wait until my BORGWARNER S366 comes in. All you bitches are going to overflow with gelatin.

18psi

iTrader: (76)

running NONOFIT

Savington

iTrader: (31)

The word "downstream" concerns me.

EO2K

iTrader: (37)

I'm surprised its taken this long before someone pointed that out.

Leafy

iTrader: (1)

I think six shooter and I already pointed it out.

concealer404

iTrader: (3)

The BORGWARNER S366 is ***** status.

Needs more BORGWARNER S464.


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