4 Cylinders, 2 Turbos, 1 Supercharger....Insanity!!

[SpicyMchaggis]

repost

 

[BradC]

From what I can see it's Intake-Turbos-Supercharger-Intercooler. The Intake to Turbos is pretty obvious. If you look at the engine on the stand (the shot from the front) you can see the Supercharger inlet pipe right under the wastegate. The poished pipe directly under the airfilters is the Charge pipe from the left turbo that tees into the charge pipe from the right turbo (not visible) and then the visible supercharger inlet pipe. The supercharger outlet is just infront of the passenger strut tower and routes to the intercooler. From there the charge pipe runs back up the driver's side and connects into the intake directly below the pipe connecting the driver's side turbo to the supercharger.

Air flow goes that way, yes. But the blower is there for low end grunt and to help the motor spool the two turbos

 

[Hughes412]

no its not...... its the way things should be

God just think how much it cost to change the plugs!

But then if you owned it you could afford it.

 

[xelderx]

Air flow goes that way, yes. But the blower is there for low end grunt and to help the motor spool the two turbos

The supercharger can't help spool the turbos since it comes after the turbos in the airflow. It does nothing more than to recompress the already compressed charge coming from the turbos to a higher level. The twin FI (or in this case triple FI) setup is so that none of the components have to work very hard to make high boost. There was a really good artcle on twin charging in the June issue of Sport Compact Car that went over all the details and such that would be involved. It was pretty informative.

 

[ChiMSP]

Slow.

 

[BradC]

The supercharger can't help spool the turbos since it comes after the turbos in the airflow. It does nothing more than to recompress the already compressed charge coming from the turbos to a higher level. The twin FI (or in this case triple FI) setup is so that none of the components have to work very hard to make high boost. There was a really good artcle on twin charging in the June issue of Sport Compact Car that went over all the details and such that would be involved. It was pretty informative.

Yes, it compresses the air post-turbo, but that doesn't mean it can't help spool. The extra energy in the exhaust from the motor having compressed (due to the roots blower) air at low rpm's helps spin the turbine up to speed quicker.

 

[ghost]

The supercharger can't help spool the turbos since it comes after the turbos in the airflow. It does nothing more than to recompress the already compressed charge coming from the turbos to a higher level. The twin FI (or in this case triple FI) setup is so that none of the components have to work very hard to make high boost. There was a really good artcle on twin charging in the June issue of Sport Compact Car that went over all the details and such that would be involved. It was pretty informative.

Not quite.

The SC will create boost instantaniusly. this will get the engine to a higher RPM with more mass exhaust coming from the engine. This in turn will cause the Turbo to spool up in less time and reach efficient CFMs quicker (ie:turbo lag).

If you mix a low boost on the SC, lets say enough to get the car to 3500-4000rpm where the turbo is at optimal boost you relieve the majority of the turbo lag. Also since the majority of the SC that are around now are regulated with a wastegate type actuator, the boost from the SC will decrease as the turbo increases. You can actually have a ECM control the SC wastegate to partiallyopen while the turbo is under full boost.

There is a prototype Jeta in the works using this meathod.

 

[xelderx]

I was refering to it as one complete engine cycle which would end with the exhaust. Yes...there would be some gain from the initial suspercharger output, but it is not directly influencing the air charge going to the turbos in the same way the turbos are influening the supercharger. Although, the turbos don't really effect the supercharger at all since it is spinning at a set rate per engine RPM no matter how much air is fed to it. That was my statement. it just recompresses the air from the turbos to a higher level.

 

[ghost]

(werd) Just keepin you on point Justin. I got to try and get you on something damnit.lol!

I was refering to it as one complete engine cycle which would end with the exhaust. Yes...there would be some gain from the initial suspercharger output, but it is not directly influencing the air charge going to the turbos in the same way the turbos are influening the supercharger. Although, the turbos don't really effect the supercharger at all since it is spinning at a set rate per engine RPM no matter how much air is fed to it. That was my statement. it just recompresses the air from the turbos to a higher level.

 

[Brian MP5T]

Heavy For Nothing.

 

[Brian MP5T]

Sport Compact did a test on a MR2.

They Tested It With Turbo
They Tested It With a Supercharger

Then they tested it with both.

THe problem is that the turbos would be hindered by the suprecharger at anything over 4000 RPM...

 

[Shane5425]

i would say one way to get around that problem would be to let the supercharger run its own pipes and the turbo run theres and use a Y adapter near the TB.. that would allow the turbos to get there full potential without gettin bound up in the supercharger..

 

[ghost]

i would say one way to get around that problem would be to let the supercharger run its own pipes and the turbo run theres and use a Y adapter near the TB.. that would allow the turbos to get there full potential without gettin bound up in the supercharger..

That would only be semi possible with a centrfical supercharger. The Eaton root style replaces the intake manifols 99% of the time.

 

[Shane5425]

yeah, it would work with that subby... that didnt replace the manifold..

 

[Brian MP5T]

i would say one way to get around that problem would be to let the supercharger run its own pipes and the turbo run theres and use a Y adapter near the TB.. that would allow the turbos to get there full potential without gettin bound up in the supercharger..

Ummm, that would Backspool the turbos when you were just driving along and your supercharger would become useless then..

 

[Shane5425]

Ummm, that would Backspool the turbos when you were just driving along and your supercharger would become useless then..

ahh ok... learn something new every day..

 

[Brian MP5T]

ahh ok... learn something new every day..

Thats Cool.

It's why we come here..