Slant Six Forum :: Twin Turbos?

I'm a bit concerned about your turbo's compressor seal. As a former Conquest owner I know that Mitsubishi put the throttle after the compressor. This means, of course, that the compressor was never under vacuum. Turbo I 2.2s used a thottle upstream of the compressor so those little T3s will take vacuum. I own a vehicle with a 16G on a 2.0 liter engine stock. I can't imagine running a 12G on a 3.7L.

The carb height is not ideal, it hits the hood, time for a scoop!

Nice pics of a home built system. What kind of specs on the motor? I am guessing minimal flow work (head/cam) for that turbo to work.

...and Sam, great description of your turbo driving experiences, makes me want one

Quote:

For that turbo to work? It "works" great! Trust me its not too small, can't wait to dyno

Author:	D150 [ Tue Jun 13, 2006 8:56 am ]
Post subject:
Quote: I'm a bit concerned about your turbo's compressor seal. As a former Conquest owner I know that Mitsubishi put the throttle after the compressor. This means, of course, that the compressor was never under vacuum. Turbo I 2.2s used a thottle upstream of the compressor so those little T3s will take vacuum. I own a vehicle with a 16G on a 2.0 liter engine stock. I can't imagine running a 12G on a 3.7L. Sharp guy! Lets me know I can learn a lot on this site! Yes the seal is a problem, that turbo just wasn't designed for drawthru. As far as turbo size...you should try it. At 10psi boost it screams! Larger means more LAG. I like low end power. Its in my truck, not a drag car.

Author:	D150 [ Tue Jun 13, 2006 8:58 am ]
Post subject:	Re: pic turbo
Quote: The carb height is not ideal, it hits the hood, time for a scoop! What about side-draft carbs????[/quote] Hey ya run what ya got!

Author:	D150 [ Tue Jun 13, 2006 9:01 am ]
Post subject:	Re: turbo
Quote: Nice pics of a home built system. What kind of specs on the motor? I am guessing minimal flow work (head/cam) for that turbo to work. ...and Sam, great description of your turbo driving experiences, makes me want one For that turbo to work? It "works" great! Trust me its not too small, can't wait to dyno

Author:	D150 [ Tue Jun 13, 2006 9:19 am ]
Post subject:
I'm changing my set-up to a blow thru, maybe with an intercooler. Can the stock Carter BBD 2 barrel handle blowthru? Shuold I box in the whole carb? Been studying carb/ centrf. supercharger set-ups.

Author:	Joshie225 [ Tue Jun 13, 2006 2:26 pm ]
Post subject:
Since you have a Super Six intake on the truck I'd get an adapter and use a Holley 350 2bbl. I'd also port match and taper the adapter to the manifold. The Holley's are much easier to tune than the BBD mostly due to all the literature and parts that already exist. You'll need a boost referenced fuel pump or an electric pump and boost referenced regulator for blow thorugh as I'm sure you already know. For the carb I would start with stock jets, but open up the power valve channel restriction. I'd also change out the power valve for one that opens a bit later (lower number like a 5.0) to help with fuel economy as it will delay getting into the rich power mixture, but still give adequate fuel under boost.

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Twin Turbos? https://www.slantsix.org/forum/viewtopic.php?t=17816	Page 3 of 4

Author:	Joshie225 [ Tue Jun 13, 2006 2:28 pm ]
Post subject:	Re: turbo
Quote: Quote: Nice pics of a home built system. What kind of specs on the motor? I am guessing minimal flow work (head/cam) for that turbo to work. ...and Sam, great description of your turbo driving experiences, makes me want one For that turbo to work? It "works" great! Trust me its not too small, can't wait to dyno Any idea of the exhaust back pressure? When full boost comes on and at red-line?

Author:	D150 [ Tue Jun 13, 2006 9:17 pm ]
Post subject:	turbo
Thanks Josh, for the tech support. Sounds like you've done this before. As far as back pressure goes...seems like I've seen that ques before. I have not put a gauge on it. the turbine housing has got over 500F HOT Will the Holley 350 2bbl use an air horn or a carb box for boost?

Author:	Joshie225 [ Wed Jun 14, 2006 12:16 am ]
Post subject:
I wish I had done it. I have an interesting mock up picture somewhere of my /6 turbo ideas. The Holley 350 can use the same carb hat as a Holley 4bbl. I have a Turbonetics hat, but it's just sitting on my normally aspirated 318 van as the throttle linkage for the 4bbl swap was a PITA.

Author:	D150 [ Wed Jun 14, 2006 9:24 am ]
Post subject:	turbo
so it can use an air hat ? no box...

Author:	Rust collector [ Wed Jun 14, 2006 10:39 am ]
Post subject:
yes

Author:	DionR [ Tue Jun 20, 2006 4:56 pm ]
Post subject:
Back to the topic. Seems Honda is going to finely do a turbo motor. Not that I've been waiting, but I guess they have been ideologically opposed to them in their cars, unless it was a CART car. Probably couldn't compete without one there, though. The point is, they have an interesting way to reduce lag. Seems they are using a turbo with two scrolls, one small and one large. There is a flapper valve in the manifold, or turbo, that forces all of the exhaust through the small scroll until the turbo spools up, then it opens and let the exhaust flow through the large scroll. There is a picture of in in the current online magazine Winding Road. Can't seem to get ahold of the picture as it is a .pdf, so I can't post it. Not sure if it gives you an idea, but thought it might help. Sure seems like you could build a setup using a divided turbine housing, and position a valve between the manifold and turbo to force the exhaust through half the housing until it was making boost. If the housing were sized correctly, maybe it would even double as a boost controller (more area=less pressure=less turbine speed). Just an idea.

Author:	Thropar [ Tue Jun 20, 2006 6:30 pm ]
Post subject:	Honda
Good to hear Honda is headed into turbos, especially something like this. It sounds like it might act like a VATN turbo (variable area turbine nozzle), a good thing for our world.

Author:	D150 [ Tue Jun 20, 2006 9:54 pm ]
Post subject:
I think Honda is going to use a turbo in their Acura SUV first, then who knows. Not that I keep up with imports.

Author:	Matt Cramer [ Wed Jun 21, 2006 5:26 am ]
Post subject:
I know that Honda had a little bitty car called the City (presumably it was a riff on the Civic theme) that came with a turbo. Never sold in the United States, but I think it's related to the Fit. And they also tried to turn the CX500 into a turbocharged sport bike, with mixed results. I'll bet the turbos they put on the CX might be a good choice if you wanted to build a slant with more than two turbos, though.

Author:	Draco_Scaline [ Wed Jun 21, 2006 6:16 am ]
Post subject:	honda ,huh?
so isn't that new honda turbo like two turbos in one?... and would it even fit on a 225? anything would be great.. want my dart to be a street racer what is the best way to get "turbo air" into the engine? the standard air cleaner assemble obviously woln't do it... i heard turbo city had something, can't rember what..

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