SPEN555

Just wondered has anybody done a rotated twin scroll as it would allow a filter to be just put more or less directly on the turbo.

I would imagine the type 25 track car might be running this but not sure whether it is still twin scroll.

Would I be right in thinking it would then need a new revised twin scroll up-pipe, new downpipe and a turbo that is clocked to get it in the right position. If so does anyone know the costs involved?

APIDavid

iTrader: (4)

I've been though a few hoops on this myself lately. It seems that the exhaust housing on the TS turbo is too restrictive as it is ' too small ' and the moment that you try to wring too much out of it, the temps go through the roof and it turns into a bag of poo !

Consensus, suggests that there is not much to be gained from twiddling with TS turbos because of that. I've just spent close to £500 on having a Spec C one extensively modified at Owen developments with Incanel parts in the waste gate and a so-on, plus a Garrett exhaust turbine. Owen's say ' that's it ' for development. If that don't work - try another turbo...

Rotating it in their opinion is a waste of money.

Mark at Lateral is making proper up pipes to fit a Garrett onto the system and make horspower that way. It loses the big torque rush that you get with the TS but ultimately it seems that is all you are going to get.

Certainly nothing above 380 seems to be genuinely possible. I need to make 420 or a bit more for my customer. That's why I am going for the bigger set up.

Does that help focus you ??

David APi

SPEN555

So is that an uppipe which bolts to the twin scroll headers and then allows the Garrett to be fitted? So it would start off twin scroll going to a single scroll turbo.

If I was going for a turbo change I had 420 in mind to make it worthwhile due to changing the various buts otherwise it would not be VFM.

I thought Mitsubishi Evo's ran twin scrolls amongst other cars and having had my car over 3 years now I thought bigger turbos would have become available. All the hybrids I see just use the existing VF36/37.

Damian.

APIDavid

iTrader: (4)

Evo turbos run the opposite direction to ' all other ' turbos.

I haven't seen a pipe from Mark yet, but I imagine that the twin pipes go into a single collector and use the Garrett type turbo mount for the up pipe and downpipe.

It seems that there is no alternative currently to the standard TS exhaust housing. Thus no development.

David APi

PS why not wait and see how we get on with either the Owens version or the Garrett kit from Mark?

SPEN555

Don't worry I won't be rushing into anything yet, still trying to extract the potential out of my existing set up

David_Wallis

You can buy twinscroll turbo's from Garrett and also from mark and others

best of both worlds then

SPEN555

Hmmm! I will have to look into this

ex-webby

A number of solutions already exist, but all at the expense of spool-up on the twin scroll setup.

If you want to keep the spool up of the original TS turbo design (36/37) the best you will be able to manage is a hybrid of this turbo (I spent 6 months with three companies on this), utilising the original exhaust housing.

Rotating a larger TS has been proven and works.

Sticking a Garrett on in normal position (twin in to one) has also been proven, works and a solution is available.

Regards,
Shaun.

APIDavid

iTrader: (4)

Shaun, Call me please.

ex-webby

Am I in the ****?

I'll pop over later...... get the kettle on.

Regards,
Shaun.

LitchfieldImports

Damian, have a word with Powerstation as well as they have run a JDM car with 400bhp using a version of the twinscroll Type-25 turbo.

Regards

Iain

ex-webby

Jeese..... thats two twinscroll turbo's I have been told about today. As soon as I leave one person, I get told about another. One that will hopefully bust the 400bhp mark to be tested and one that has bust the 400bhp.

Iain,
The torque figure, response and boost figures you gave me sounds very very good indeed.

Nice one.

Regards,
Shaun.

Hol

iTrader: (1)

I hate chasing numbers, but i would like to pass the 400/400 mark.

Ill be happy then and settle down.

SPEN555

420bhp would be sensible as you have comfortably broken 400 and then leave it at that

stevebt

iTrader: (8)

zen can supply 500bhp rotated mount twin scroll turbo's !!

Andy.F

Garrett have 1000bhp+ twin scrolls on the shelf, getting one that makes 400+ AND makes decent boost before 3000rpm is the real challenge

Andy

V5-APS

iTrader: (1)

What about the new APS Twin scroll rotated kit.....

http://www.airpowersystems.com.au/wr...roll/turbo.htm

Andy.F

Looks good Not sure the maf will be too happy mounted there though and twin wastegates would be ideal, other than that, I like it

Andy

Robin Mullan

It does look like serious bit of kit, but how much does it all cost knowing how expensive APS parts are.

Hol

iTrader: (1)

I would not expect much change from £2500.

So about £35/Bhp. Plus fitting.

David_Wallis

KY?

SPEN555

lol, exactly meets the requirements of my post title

Does look expensive though, but you would need the custom exhaust work anyway so maybe not.

Could just stick a filter on the turbo and run something like GEMS without the MAF?

LitchfieldImports

You can run Ecutek without the MAF as well

SPEN555

Iain,

Thats interesting, what do you use instead? Or is it top secret

stevebt

iTrader: (8)

that doesnt look a bad turbo might be tempted to fit something like that and get rid of my gt30R

SPEN555

Is the gt30r twin scroll? What spec is your car and power/torque are you getting?

stevebt

iTrader: (8)

the gt30r isnt twin scroll and mine is the white STI thats in pauls garage, and its had just a couple of mods done

SPEN555

Oh that one

Bob Rawle

"You can run Ecutek without the MAF as well"

Damien I'll explain that to you when I see you, there isn't a problem with using a maf though.

Subaru Group N cars don't use the maf, I've got that and a couple other rom files here somewhere. Bit "course" though.

Not secret.

cheers

bob