twin scroll turbo manifold?

[black2000gts]

I was reading a car magazine a little bit ago and I found an article about twin scoll turbo chargers and manifolds. Now, I'm sure that I've barely scratched the surface on the knowledge of twin scroll turbo's and manifolds, but this seems like something that would be benificial to have on a celica.

It talked about how the more efficent exhaust flow would help lessen the backed up exhaust that's usually built up from a single collector manifold, which is good for performance and engine stress, and also help lower temperatures a little bit. Also, with the increased flow, it would help with performance as well.

Has anybody ever thought about making a twin scroll turbo manifold? Would it even be worth having?

[black2000gts]

Anybody know anything about this? would it be benificial to have as compared to a normal exhaust manifold?

[smart_rocket]

I believe with the real professional engineering there would be some benefit, but a big issue for proper manifold design and fire-events... in the K20 scene they also did ready great results...

But from scratch I estimate it better suits the boxer engines from a STi, coz this engine is realy symmetrical and like a perfect match for twinscroll style, also the reason it is known in this scene to work with the pros of more back pressure at low rpm and more flow in the high range...

for the cost of such a project, I'd prefer to invest the money in a 750hp FI kit from MWR and be very proud of keeping some lag for the nerves... actually you can manage surge, backpressure, lag etc, with a very good BOV/Wastegate/Turbotimer design

Twinscroll is not something new... I ready bought years ago a twinscrolled GT turbo... If you wanna go this route lemme know, we can do a very good price on a new GT3276 Twinscroll, which with some mods on the 2zz will do a fine match on plotting it to the compressor and turbine maps of this turbo...

[black2000gts]

ok. thanks for the info. But is the turbocharger itself a special twin scroll turbo, or is it just the way the manifold is put together that flows better into the turbo?

[Gtsjeg04]

turbo inlet is designed differently if im not mistaken. From what I have read the exhaust manifold and turbo turbine side are designed to incrrease scavenging to increase efficency.

take a look at this
http://www.modified.com/tech/modp-0906-twin-scroll-turbo-system-design/high_performance.html

[Boosted2.0]

The 3S-GTEs all used twin scroll turbos. Its not that hard to design a manifold for it - 1 and 3 to one scroll, 2 and 4 to the other. You have to use a twin scroll turbo though - they have a different turbine housing with 2 seperate inlets on them.

The gains you get in spool time are generally considered not worth the hassle though

[6strngs]

The 3S-GTEs all used twin scroll turbos. Its not that hard to design a manifold for it - 1 and 3 to one scroll, 2 and 4 to the other. You have to use a twin scroll turbo though - they have a different turbine housing with 2 seperate inlets on them.

The gains you get in spool time are generally considered not worth the hassle though
well, the 1st gen 3sgte in 88-89, like the one in my 88 alltrac, are single entry.

Anyways, I had a twin scroll CT26 on my 5sfte and have the singe scroll on the alltrac and the 5sfte definately spooled faster, but then again it's 2.2L engine vs. 2.0L so not really a valid comparison. I doubt it'll make a big enough difference to be worth all the extra money you'll spend to have a custom made manifold and everything. maybe 2-300 rpm quicker spool, but that's it

[black2000gts]

Ok, but you think people would buy a twin scroll turbo kit if a company made one that was comperably priced relative to other turbo kits?

[Boosted2.0]

Ok, but you think people would buy a twin scroll turbo kit if a company made one that was comperably priced relative to other turbo kits?

If it outperformed them. A GT series single entry, properly sized, way out performs a CT26 which is a twin scroll. Its a newer better technology with a great compressor and turbine design.

Now if they make a twin scroll GT series that would be the way to go...

[Illusive]

Here's a good comparo of a twinscroll 35r vs a single scroll 35r on a subaru

mods/boost/timing all consistant between the two cars, with the exception of the different header for the twinscroll.

twin = green
single = red

http://i16.photobucket.com/albums/b4/badazzcr/fr35rtest.jpg

[black2000gts]

I see what you're saying. The GT series turbo is just better technology than a CT26 turbo. I was researching something else and I came across this part for another car.

http://www.berktechnology.com/shop/product.asp?strParents=92&CAT_ID=129&P_ID=418

Now, I'm not too sure what I'm exactly looking at in this link, but it says that it could allow you to use a GT30-GT35 turbo. Granted, it's for the 3sgte engine, but is that an adapter of some kind for a different turbo to fit a twin scroll manifold? If so, could something like this be made for a celica application?

[6strngs]

I see what you're saying. The GT series turbo is just better technology than a CT26 turbo. I was researching something else and I came across this part for another car.

http://www.berktechnology.com/shop/product.asp?strParents=92&CAT_ID=129&P_ID=418

Now, I'm not too sure what I'm exactly looking at in this link, but it says that it could allow you to use a GT30-GT35 turbo. Granted, it's for the 3sgte engine, but is that an adapter of some kind for a different turbo to fit a twin scroll manifold? If so, could something like this be made for a celica application?

That's just an adaptor so you can use a different turbo with the stock 3sgte manifold, since no aftermarket turbo uses the same flange as the factory CT-26. You don't need it on a celica since any aftermarket turbo manifolds will come with a common flange like a T3 or T25, to bolt right up to a turbo using a T3 or T25 flange without an adaptor. and if it's a twin-scroll manifold, it'll have a twin scroll flange to bolt to a twin-scroll turbo

[Boosted2.0]

Here's a good comparo of a twinscroll 35r vs a single scroll 35r on a subaru

mods/boost/timing all consistant between the two cars, with the exception of the different header for the twinscroll.

twin = green
single = red

http://i16.photobucket.com/albums/b4/badazzcr/fr35rtest.jpg

Huh - more losses on the top end than I would have expected with the twin scroll. Still, the gains on the bottom end owuld make it seem worth looking into unless you are just chasing peak power numbers.