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Old 20-03-2005, 06:41 PM
Richard L Richard L is offline
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Default Direct water injection on 2005 WRC

The latest water direct injection is being use don the latest 05 subaru WRC car. Looks good and it also wins reces. (Maxico this month)

http://www.subdriven.com/news/publis...icle_342.shtml
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Old 21-03-2005, 05:04 PM
TurboGTi TurboGTi is offline
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Default Re: Direct water injection on 2005 WRC

Quote:
Originally Posted by Richard L
The latest water direct injection is being use don the latest 05 subaru WRC car. Looks good and it also wins reces. (Maxico this month)

http://www.subdriven.com/news/publis...icle_342.shtml
HUH richard i thought they were banning water injection for WRC?
Ok i'm now confused ??
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Old 21-03-2005, 08:21 PM
Richard L Richard L is offline
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Yes they are, in 2006.

All that devlopment just for a few month! :?
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Old 21-03-2005, 08:39 PM
TurboGTi TurboGTi is offline
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Quote:
Originally Posted by Richard L
Yes they are, in 2006.

All that devlopment just for a few month! :?
oh man that sucks ...... but great development i can imagine ...
can you tell me what types of development went into this ?
such as pump pressure timing etc?
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Old 21-03-2005, 09:37 PM
Richard L Richard L is offline
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There has been a lot of work between Prodrive and Sti - I was kept pretty much in the dark, so nothing to report , sorry.
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Old 22-03-2005, 06:07 AM
PuntoRex PuntoRex is offline
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It said, "The new water injection system is able to deliver precisely the right amount of water to each of the four cylinders and is a significant improvement over the previous unit."

But I don't see "direct" injection.

So, would it be some kind of port injection like sequential fuel injection?

I saw 2 suspicious metal rails across the manifold runner, maybe...
Below that, in the right side where we can see, there seems another rail for fuel...
Or that's for water & the upper ones for fuel?



If this picture is against any policy, please let me know. Then I'll delete it right away.
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Old 22-03-2005, 06:17 AM
PuntoRex PuntoRex is offline
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BTW, is there any advantage to install the turbo vertically?
Except for lower the exhaust pipe routing?
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Old 22-03-2005, 06:28 PM
max_torque max_torque is offline
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Quote:
Originally Posted by PuntoRex
BTW, is there any advantage to install the turbo vertically?
Except for lower the exhaust pipe routing?

It's basicaly been forced to be that way by the need to fit the preturbocharger combuster into the exhaust system, and also clear the engine subframe / steering rack etc.

I wouldn't recommend this position on a road car, because the turbine oil seal is piston ring type seal, that only works when the turbo is spinning, so when you key off a small amount of oil will dribble into the exhaust (not a problem for a race / rally car)
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Old 24-03-2005, 11:01 PM
Richard L Richard L is offline
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Quote:
Originally Posted by PuntoRex
It said, "The new water injection system is able to deliver precisely the right amount of water to each of the four cylinders and is a significant improvement over the previous unit."

But I don't see "direct" injection.

So, would it be some kind of port injection like sequential fuel injection?

I saw 2 suspicious metal rails across the manifold runner, maybe...
Below that, in the right side where we can see, there seems another rail for fuel...
Or that's for water & the upper ones for fuel?
It appears that the injection is very similar to Ford Focus's WRC twin rail WI/FI the season before. Water is directed towards the inlet valves to minimise pre-ignition (aftermaths of anti-lag), cooling the inlet valves has great benifit to induction efficiency especially if the water delivery is sequential.

Complex multi-channel EGT monitoring management will allow water quanity trim to each cylinder - for the subaru - this is essential to balance the heat distribution amongst exhaust runners and manages the uneven water ways that runs around the two heads - flat four engine is a pain to cool.

I am only guessing.
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