Supercharger or Turbo ?

[ichitaka05]

Originally Posted by GenkiElite

Duct tape and a leaf blower ftw.

Hey those thing do have punch! iirc there were some youtube vid on NA vs leaf blower

[djohnson]

Why not go absolutely crazy and use both?

[ichitaka05]

Originally Posted by djohnson

Why not go absolutely crazy and use both?

Did I heard both?

Like this?










wanna read more here's the thread
http://forums.nasioc.com/forums/show....php?t=1688562

[bigbcraig]

Originally Posted by ichitaka05

Did I heard both?

Like this?
...
wanna read more here's the thread
http://forums.nasioc.com/forums/show....php?t=1688562

Yes, but this isn't really twincharging. He does not compound the boost, i.e. running thru supercharger and then turbo; rather he uses the SC until the turbo spools, at which point the SC is bypassed and its clutch releases. It's a highly over-engineered way to mostly eliminate lag, not a madman making insane amounts of power with compounded induction.
(Noting that, if I recall properly, he was running nigh 600 hp)

[ichitaka05]

Originally Posted by bigbcraig

Yes, but this isn't really twincharging. He does not compound the boost, i.e. running thru supercharger and then turbo; rather he uses the SC until the turbo spools, at which point the SC is bypassed and its clutch releases. It's a highly over-engineered way to mostly eliminate lag, not a madman making insane amounts of power with compounded induction.
(Noting that, if I recall properly, he was running nigh 600 hp)

True 640hp iirc.

How bout this one? Do you remember this one? Twin Turbo Supercharged

[Dimman]

Originally Posted by bigbcraig

Yes, but this isn't really twincharging. He does not compound the boost, i.e. running thru supercharger and then turbo; rather he uses the SC until the turbo spools, at which point the SC is bypassed and its clutch releases. It's a highly over-engineered way to mostly eliminate lag, not a madman making insane amounts of power with compounded induction.
(Noting that, if I recall properly, he was running nigh 600 hp)

This is what you're talking about for real twincharging.

[bigbcraig]

Originally Posted by ichitaka05

True 640hp iirc.

How bout this one? Do you remember this one? Twin Turbo Supercharged

I know I've seen that twin turbo / air filters in the hood setup... but not with a supercharger too! o.O
I wonder if it's similar to the first one you posted, in that the setup is SC > TC and not compounding.

Originally Posted by Dimman

This is what you're talking about for real twincharging.

Yep, exactly! The best example of this I've seen was a Mini S (older SC'd one)
build by a guy Hubie Fuh, featured in Sport Compact Car a while back. As well as the feature, there was an interesting Dave Coleman editorial / technical article on it. Basically, it was easier and more efficient to compound-charge the Mini by adding a small turbo and routing it with the stock supercharger than try to spin it way out of its efficiency range to up the boost.

I believe there was a similar setup available for the first-gen MR2s that were supercharged, to twin charge.

But, especially with new supercharger and turbocharger technology and the perils of modern engine management tuning, I'd shy away from twin-charging, stock or aftermarket. There should be enough room under the hood to have fun, with the little flat 4 (which should be far back towards the firewall).

[ichitaka05]

Originally Posted by bigbcraig

I know I've seen that twin turbo / air filters in the hood setup... but not with a supercharger too! o.O
I wonder if it's similar to the first one you posted, in that the setup is SC > TC and not compounding.

iirc it should be compounding

[Franisco]

What is the point of that though? Couldn't you just turn up the loud button on the turbo alone and get the same effect? I understand the bypass version, but the compound version doesn't make sense.

[Dimman]

Originally Posted by Franisco

What is the point of that though? Couldn't you just turn up the loud button on the turbo alone and get the same effect? I understand the bypass version, but the compound version doesn't make sense.

Stage one boost is instantly on from the positive displacement supercharger.

Stage two is once the turbo spools, feeds into the supercharger, gets compressed again, then enters the intake. This creates massive intake pressure, and since the turbo doesn't even have to be that big, very quickly.

Size matching them is apparently a little complicated though.

Diesel trucks can do it with small and big turbos.

[ichitaka05]

Originally Posted by Dimman

Stage one boost is instantly on from the positive displacement supercharger.

Stage two is once the turbo spools, feeds into the supercharger, gets compressed again, then enters the intake. This creates massive intake pressure, and since the turbo doesn't even have to be that big, very quickly.

Size matching them is apparently a little complicated though.

Diesel trucks can do it with small and big turbos.

size matching isn't the problem. How much air goes into SC & TC is the problem (PSI).

[Franisco]

Originally Posted by Dimman

Stage one boost is instantly on from the positive displacement supercharger.

Stage two is once the turbo spools, feeds into the supercharger, gets compressed again, then enters the intake. This creates massive intake pressure, and since the turbo doesn't even have to be that big, very quickly.

Size matching them is apparently a little complicated though.

Diesel trucks can do it with small and big turbos.

Hm, interesting concept. I'd see that as being a reliability nightmare though

[MtnDrvr86]

Originally Posted by Franisco

Hm, interesting concept. I'd see that as being a reliability nightmare though

Volkswagen has been doing it for a few years from the factory on their 1.4 TSI. Its won a few awards aswell

[BoostJunkie]

Just look at what Subaru has done with there turbo boxer platforms in the impreza's, hope they continue the tradition