Turbo Exhaust

[Woo]

Who's got what on what sort of turbo and where from?

Currently I run a 2.5" on a GT30/71R and have found that I've reached the limit of the exhaust. Looking for options

[Okibi]

3" always seems to be the standard on more powerful turbo setups.

How much power are you making with your 2.5" exhaust?

[mx52nv]

HKS GT2535 on 20psi with a 2.5" exhaust.

[mx52nv]

Obviously

[Woo]

3" always seems to be the standard on more powerful turbo setups.

How much power are you making with your 2.5" exhaust?

"Obviously" you havent looked in the Garage Okibi hahaha
Lets just say, not enough
The cast AVO dump that I have is very restrictive too. Does anyone have a 3" dump coming off an internally gated turbo on an AVO cast manifold? I've had a bit of a look and there doesnt seem much room between the firewall to fit a 3".

Cheers
Bazz

[ampz]

I have the HKS GT2535 on the 1.6 with a 2.5 in exhaust running 8psi (boo, I'll get that EBC working this weekend).

As for the T3 is it the 5 bolt flange on the rear?
If so I have one of these that is being matted to a GT2554 on a bottom mount manifold (jeez I'm lazy though, I've only tacked together the outside primaries on the mani.

That will flow on to a 3 inch exhaust. Possibly tapering down to 2.5.

[blackster]

Looking for options

Chasing every kw possible?

3" turboback exhaust including divorced wastegate 3" downpipe

[Woo]

Nice bit of kit Blackster.
Looks like your turbo takes pride and place in the top of the engine bay. There is no way that that would fit and AVO setup.
If you were really chasing everything you'd be looking at a 4" with a screamer pipe, but unless the turbo is huge, it's overkill.

I like the v band adaptor idea ampz, although it takes up space that could be used for the bend. It does make fitting a heck of a lot easier though

cheers
Bazz

[blackster]

Nice bit of kit Blackster.
Looks like your turbo takes pride and place in the top of the engine bay. There is no way that that would fit and AVO setup.
If you were really chasing everything you'd be looking at a 4" with a screamer pipe, but unless the turbo is huge, it's overkill.

I would love to say that its my exhaust, but its not. Its off a yankee MSM, work was done by Tim shore. If I was chasing big power, keeping it street legal and price was not a factor, then thats I would be looking to get.

Screamer pipe, decat and 4" . I can imagine the fun you will have, when it comes to emissions testing.

[Novice1]

Garrett T28 turbo, 2.5 inch Magnaflow Cat back exhaust.

168.3kw atw on 12 psi.

Cheers Novice1

[Woo]

I can imagine the fun you will have, when it comes to emissions testing.

Emissions testing? ..... whats that?

Have you ever tried to get a standalone certified? Avoiding detection and saving it for the track is the key

Good numbers Novice, is that an AVO manifold?

Ampz, are you going to run the extra bank of injectors? is that what you ment by tacking on the primaries?

[PASHN8]

Baz, what ECU are you using in the MX?

[Novice1]

I can imagine the fun you will have, when it comes to emissions testing.

Emissions testing? ..... whats that?

Have you ever tried to get a standalone certified? Avoiding detection and saving it for the track is the key

Good numbers Novice, is that an AVO manifold?

Ampz, are you going to run the extra bank of injectors? is that what you ment by tacking on the primaries?

AVO stage 2 manifold, 550cc injectors, plus a few other goodies.
Cheers Novice1

[ampz]

Single injectors at the moment. 370cc on 6psi atm (the electronic boost control died)

I'm making a bottom mount manifold using the flange off the original extractors (1.6).
I've put about 2 hours into it now (started 2 months ago)
I've tack welded in spots the primary bends off the manifold heading down to the collector. That's it!

When it's finished (hopefully before the car is extinct)
I'm hoping for it to look like this

[Sean]

Lookup Ryno (lowmiata on here).

He has made a custom dump for his AVO based set-up and I'm sure he could build you one quite similar.

When I had the big turbo and dump on mine I cut away some of the "ledge" that comes out from the fire wall to allow more room for the dump. It's not structural and my engineer was OK with it - Just be sure to check how far you intend to cut, it could get ugly if you cut too far back.

Matt from Hi-Tech Modifications in Sydney has also made some sweet dumps for MX5s, he made one of my old set-ups for the big turbo and also made the one currently on Steve Gosbees hi po NA6 turbo.