Sequential Turbo

[Sarthos]

Not sure how good a supercharger would be on an F22. Not sure it can produce enough torque to spin the supercharger. The supercharger is controlled by RPMs, while a turbo is spooled by air flow. So in the top end the turbo will help spool itself up, but you'd almost want a sequential pulley setup on a supercharger to take off in an F22

[gloryaccordy]

Not sure how good a supercharger would be on an F22. Not sure it can produce enough torque to spin the supercharger. The supercharger is controlled by RPMs, while a turbo is spooled by air flow. So in the top end the turbo will help spool itself up, but you'd almost want a sequential pulley setup on a supercharger to take off in an F22

U could get a pulley that makes the supercharger peak out around 3500 RPM

Another thing to consider is the added weight... two turbos + crazy piping - the front mount = ????? You would need a super stiff, possibly custom rear mount or some extra engine bracing

[Sarthos]

If the turbo peaks at 3500 RPM, I'm not sure the F22 has the torque to get that thing spinning. And you generaly can't make superchargers peak out, they'll normally just keep putting boost out as high as you run them.

And a sequential turbo is still just one turbo...

[theSOB]

And a sequential turbo is still just one turbo...

the sequential turbo is just one, however the sequential turbo setup is a twin turbo set up where one turbo is small and the other is larger.

[dbsharp]

I grantee you a f22 makes enough to torque to spin a supercharger.

[Sarthos]

Well then what do you call the turbo setup where the turbo opens to become larger or smaller depending on the exhaust flow even though it's still one turbo?

[choogee3]

I dont think its the exact technical name for it, but that would be a variable pitch compressor turbo. Its the same thing a comercial turboprop plane uses to control its speed.

[gloryaccordy]

I grantee you a f22 makes enough to torque to spin a supercharger.

Yea they make kits for D15s & Miata motors.

[Sarthos]

But don't superchargers for small motors generally have such giant pulleys that you don't get nearly as much boost as you can with a turbo?

[blazen_accord]

Here one of the turbo that tried to fit both small-fast spool up and large more air into one turbo. Bullseye Borg Warner- Extended Tip Technology

go here for more detail on the extended top compressor wheel.
http://carterrace.com/front/index.ph...id=22&Itemid=1

[quaidum]

Well then what do you call the turbo setup where the turbo opens to become larger or smaller depending on the exhaust flow even though it's still one turbo?

variable turbine geometry

read more about it herehttp://www.turbos.bwauto.com/products/vtg.aspx

[dbsharp]

But don't superchargers for small motors generally have such giant pulleys that you don't get nearly as much boost as you can with a turbo?

Right now there are not any good SC options for making a lot of power. There is some development going on that could eventually lead to us having better options.

[cb7_with_snail]

this iss what you need to do my friend. go to the junk yard and find your self two audi turbos. they are small. get your self a make your own manni kit and put a single turbo to two manni pipes and the same to the other two. bboth turbo acting together will give you the boost you want 10-8500 rpms. you will need to get a h23 ecu and have one of the cams stricken from the map and have the mapper tell the car its running two turbos equaly and spare none of the details. mind you though this is only is only in theroy and should only be carried out in a disney movie and if you are a complete retard........but seriously it could be done...i think...no....yea i hope... what?

[owequitit]

I remember these when they first came out. The blades adjust pitch so that they're more closed when it is spinning slow to pick up speed faster then once at speed they are straighter to allow the most flow. Makes the turbo way more efficient but also way over-complicated.

Not sure where some of this info is coming from...

A variable geometry turbo is simply a mechanical system that varies the angle of the turbine vanes to adjust velocity. It is mechanically more complicated than not having anything there, but frankly, it has been used on gas turbine engines for decades and they are plenty reliable. The mechanical actuation is really no more complex than the wastegate.

Not sure how good a supercharger would be on an F22. Not sure it can produce enough torque to spin the supercharger. The supercharger is controlled by RPMs, while a turbo is spooled by air flow. So in the top end the turbo will help spool itself up, but you'd almost want a sequential pulley setup on a supercharger to take off in an F22

An F22 has plenty of torque to spin a supercharger. Ever seen a supercharged D16? Since the supercharger increases power, even though it consumes a portion of it, the engine would have no trouble spinning it.

I dont think its the exact technical name for it, but that would be a variable pitch compressor turbo. Its the same thing a comercial turboprop plane uses to control its speed.

The variable geometry on a turbo is on the turbine side, not the compressor side.

And a turbine engine uses a throttle to control speed. The ones that do have variable vane turbine/compressor sections simply use them to give the engine a wider range of efficiency and safe operating characteristics over a wider range of operating conditions.

But don't superchargers for small motors generally have such giant pulleys that you don't get nearly as much boost as you can with a turbo?

The pulley diameter can be varied just like with any supercharger on any engine. Smaller pulley=more boost.

Right now there are not any good SC options for making a lot of power. There is some development going on that could eventually lead to us having better options.

Have you seen what ROTREX superchargers will do on a Honda? At 10PSI, an S2K is making just about 350WHP. With some minor engine changes, it is closer to 400WHP.

[Xsjado]

as far as i know there isn't a supercharger that will fit an f22.
not even going to start about those things.
it's what i wanted to do to mine eventually but all the kits are very expensive.

don't think having 2 audi turbos would work. as a valve opens up and their supposed to be of different sizes.
variable is good for response it's on turbo porsches.
my other car has sequential turbo's.
It's supposedly a complete rats nest of hoses and solenoids.
like this maybe worse. around 16 ft of vacuum lines


Also I"m pretty sure their different sizes to each other the primary is smaller.

there a few companies that sell new sequential setups i think.
smoother power with less lag. a huge money pit i'm assuming.

I"m too tired to read.

http://www.ka-t.org/forums/viewtopic.php?t=7446