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Old 06-14-2006, 11:47 AM   #1
jmott
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Default When is subaru going to add direct injection to its motors?

VW/Audi were able to bump the compression ratio on their turbo-4 motors from 9.5 to 10.3 thanks to direct injection. And power went up from 180 to over 200. Gas mileage improves a lot as well.
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Old 06-14-2006, 11:49 AM   #2
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Aren't those low boost setups though? I always thought you wanted lower compression for high boost setups. So maybe that's really only better for stock setups.
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Old 06-14-2006, 11:52 AM   #3
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Quote:
Originally Posted by prototypeWRX
Aren't those low boost setups though? I always thought you wanted lower compression for high boost setups. So maybe that's really only better for stock setups.
Whatever boost you are running, direct injection will let you run a higher compression ratio at that boost, which will add power, reduce lag, and improve gas mileage.

Or, you could keep the compression ratio the same and add boost. woot

and, the stock 2.0T boost on the vws is 15psi, aftermarket chips bump it up to 18psi
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Old 06-14-2006, 11:53 AM   #4
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Just buy the A3 and get it over with Jack =)
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Old 06-14-2006, 11:55 AM   #5
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Quote:
Originally Posted by jmott
And power went up from 180 to over 200.
Didn't they go from 1.8 to 2.0T? Also didn't they change the turbo size? And iirc, the head changed.
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Old 06-14-2006, 11:56 AM   #6
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Quote:
Originally Posted by TypeC
Didn't they go from 1.8 to 2.0T? Also didn't they change the turbo size? And iirc, the head changed.
good call.
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Old 06-14-2006, 12:05 PM   #7
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Quote:
Originally Posted by TypeC
Didn't they go from 1.8 to 2.0T? Also didn't they change the turbo size? And iirc, the head changed.
The turbo is either smaller, or the same size. Still trying to get clarification on that. But yeah the engine got a little bigger.

Also, they are dynoing at 197 to the wheels, so seems more like 220hp. I don't know fi the 1.8t was similar under-rated or not.
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Old 06-14-2006, 12:05 PM   #8
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Quote:
Originally Posted by forced4
Just buy the A3 and get it over with Jack =)
meh, dunno yet.
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Old 06-14-2006, 12:43 PM   #9
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get the GTi with DSG
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Old 06-14-2006, 01:00 PM   #10
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DI is the way to go, if subaru is going to do it anytime soon, it will debut with the reworked impreza, and the engine (which is pretty much the same across the brand) will filter down (or up in this case).

just my guess.
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Old 06-14-2006, 01:53 PM   #11
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Quote:
Originally Posted by jmott
meh, dunno yet.
Never stopped you before
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Old 06-14-2006, 02:18 PM   #12
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BMW also just revealed a sequential (read:2) turbo direct injection motor going in their 335 next year.

They have also introduced a 2 or 3 working hydrogen powered cars that should go into production soon.
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