I have had this idea bouncing around the peanut gallery for a while.....

How well would it work to run one turbo off each cylinder bank using different size compressor but like sized turbines? I wouldn't want some radical 90 psi set up just a smaller bottom end turbo for low power band range and a larger second to "pick up" and carry out the engines rpm range.

on paper it seems logical and very doable, but I have done no research or serious number crunching yet.

A couple of 1.0L turbos would spool fast, even some from a
slightly bigger engine, like 1.5 or 1.6, but the point of twins
is to get a faster spool and more flow, so I'm not sure this
is the best way to go but it could be a lot of fun 

I was thinking two singles to act as a compound staged setup. and it would just look plain sick!

I've got two words for you.... MON-STER

Check out the Monster's Pike peaks racers from previous years. His group has done a lot of work with twins on a 2.7 engine.

-Eric

Ya, like 900 HP of work, that is a monster designed for Monster

I suppose I could settle for only 900 hp, that should tow a motorcycle trailer OK.

that's F-N nuts....

http://www.motoiq.com/magazine_articles/articletype/articleview/articleid/1625/pageid/2185/the-marvelous-monster-nobuhiro-tajimas-pikes-peak-destroyer.aspx

I would personally run a smaller vnt off of each bank. Something like a vnt 15 or 18, should work really good on the 2.7. With the power numbers I think you would want, you would probably need to go bigger. With the variable nozzle, you could get away with it
Because of the faster spooling. If it were me I would look for a more practical power number, 500 HP or so!
I really think you should do it!! Lol

I think sequential turbo's is what your talking about.

I remember some "twin turbo" Mazda RX-7's have a sequential setup?  One smaller chambered into a larger one for a wider range of response. 

like the first post says, I don't want some radical drag motor just a great performer through the whole powerband and yes I would like something to act as "sequential,compound,progressive or staged" just with one bank feeding each turbo. a symmetric design.

the 900 hp was just a joke. 3-400 would be great. reliability would be paramount.

I'm more curious if anybody has seen this system used.

>both turbos using same size turbine.
>one small compressor
>one medium to larger compressor.
>common BOV
>dual wastegates

OK, this is getting crazy now! Maybe you should just chuck the whole Suzuki thing and go buy a full size v8 4x4! 

Have you seen twin-charged engines? A supercharger that feeds a turbo (reduces lag on the turbo). I've seen a few street vehicles with this setup, but obviously nothing on a 2.7 Suzuki. It'd be pretty sweet, though.

- Andy

Those system usually feed a supercharger with a turbo

I'm not sure how unequal turbos would respond to being
in a common manifold, I think it would cause a lag response
with the second turbo from pressure trying to escape out of the
larger turbine

Equal size twins would work together and still out perform a
larger single and still spool faster, you only want 5 PSI unless
you get forged low compression pistons 

This subject needs more research, but when in doubt,
look at what the racers have done

I would just use one turbo. A mid sized ball bearing turbo should be sufficient shouldn't it? Even if its not what about a twin scroll? with reliability being paramount why try being all scientific about it?
Tuning is going to become expensive getting all crazy like you'd like.

Marc's 2JZ Turbo Compound Setup

This is what I would do if I was rich and had time. Try finding his 350z (i think) on the road, its modeled after a Cummings diesel set up i believe.

I two cents, twin scroll.

I would just use one turbo. A mid sized ball bearing turbo should be sufficient shouldn't it? Even if its not what about a twin scroll? with reliability being paramount why try being all scientific about it?
Tuning is going to become expensive getting all crazy like you'd like.

that wouldn't be twins then.

>I think I can do it with factory engine management too. here's a photo example.

How hot that engine will look sitting
under the hood of a Sidekick 

I now have turbo envy

Wild