reverse rotation turbos...

[ramzisleiman]

What exactly is the difference between the turbos we are familiar with. And the reverse rotation ones. I know that they rotate anti clockwise. But why? whats the use?.. and I've been reading on some forums, that If a car is using a reverse rotation turbo, and want to upgrade to a clockwise rotating turbo, lots of modifications should be done, and its a little hard. why is that?.. Any info, pix, links!!

[GT35Rm3]

You know how when you are below the southern hemisphere, the toliet water rotates in the opposite direction than if you were in the norther hemisphere. I think its like that.

[ramzisleiman]

You know how when you are below the southern hemisphere, the toliet water rotates in the opposite direction than if you were in the norther hemisphere. I think its like that.

Trying to act funny ?

[Binjammin]

There are applications like a v8 where you'd be running a twin turbo setup, one on each bank. If you want symmetry between banks you'd need a reverse rotation turbo.

[lefortez]

its just a matter of packaging.

[ramzisleiman]

what if the setup was single turbo. I read on some Mitsubishi forums about some 4g63 engines using this kind of turbos.

[M3 Muscle]

Two reasons: geometry to fit space constraints, or symmetrical twin turbo setups. Either way it is geometric or aesthetic. I have read of no performance differences. They just cast the housings in mirror images and cut/cast the wheels to correspond.

[ramzisleiman]

Two reasons: geometry to fit space constraints, or symmetrical twin turbo setups. Either way it is geometric or aesthetic. I have read of no performance differences. They just cast the housings in mirror images and cut/cast the wheels to correspond.

I also understand that no performance gain, but why is it a big deal if u want to upgrade later on from a reverse rotation, to a clockwise normal turbo ? could it be the piping fitment?

[M3 Muscle]

I also understand that no performance gain, but why is it a big deal if u want to upgrade later on from a reverse rotation, to a clockwise normal turbo ? could it be the piping fitment?

Yep!

[FiberFast]

There is another reason besides packaging, someone mentioned why an oem would pick a counter rotating turbo as opposed to a std. Flow path (Fluid dynamics) are affected by the port entry and path geometry. So in a perfect world, you would have a single spiral arc starting from the center of the cylinder, and rotating (Counter clockwise) out the exhaust port and ending on the turbine blade. This will reduce turbo lag in most cases.

[somebody5788]

There is another reason besides packaging, someone mentioned why an oem would pick a counter rotating turbo as opposed to a std. Flow path (Fluid dynamics) are affected by the port entry and path geometry. So in a perfect world, you would have a single spiral arc starting from the center of the cylinder, and rotating (Counter clockwise) out the exhaust port and ending on the turbine blade. This will reduce turbo lag in most cases.

The only engine you could actually replicate that path of air is a rotary or maybe a 1 cylinder engine.