997 wet-sump dry-sump question
#16
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True dry sumps are the 997 Gt3 all model years 997.1 turbo, 997 GT2 and 997 GT2 RS
That is it period.
All corvettes c7s are dry sump except for base models without z51. C6 grand sport, c6 z06, and c6 Zr1 are also dry sump.
Hope this answers all questions..
Also only the GT variants of the 9a1 motors had dry sumps just FYI
That is it period.
All corvettes c7s are dry sump except for base models without z51. C6 grand sport, c6 z06, and c6 Zr1 are also dry sump.
Hope this answers all questions..
Also only the GT variants of the 9a1 motors had dry sumps just FYI
#18
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Interesting. We have Leon993 revive this thread back in 2011 after 6 years in slumber. And now chicabum performing another resuscitation after another 5 years.
I think it is well established that the 997.1 M97 engine that this thread was asking about way back in 2005 (11 years ago) is not dry sump.
I think it is well established that the 997.1 M97 engine that this thread was asking about way back in 2005 (11 years ago) is not dry sump.
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Vernin (07-18-2024)
#19
Instructor
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I was very let-down when I learned that that the sump in my 2007 C2S that the Porsche marketing literature called an "integrated" dry sump was not actually a dry sump. Here I thought I'd never have to worry about starvation. Typical corporate BS I assume.
#20
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Some of the money they saved on its "integrated dry sump" engines went to the marketing department.
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Hella-Buggin' (07-24-2021)
#21
Rennlist Member
#24
Racer
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My understanding of the 9A1 engine is that it has a new concept for the oiling system that eliminates oil starvation while cornering, i.e. it delivers the full benefit of dry sump but in an innovative way. The system can reduce power to the oil pump while just chugging along to improve fuel economy, but them ramp up additional oil flow immediately when driven hard. Is that correct?
#25
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My understanding of the 9A1 engine is that it has a new concept for the oiling system that eliminates oil starvation while cornering, i.e. it delivers the full benefit of dry sump but in an innovative way. The system can reduce power to the oil pump while just chugging along to improve fuel economy, but them ramp up additional oil flow immediately when driven hard. Is that correct?
The proportional control valve does vary pressure based upon motor needs and does add a fraction to the mpg value, but this is not a solution to starvation.
A true dry dump resides external to the motor. The 9A1 chamber is internal to the motor. It acts like a dry sump but what you call it is dependent upon semantics.
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Kineticdg (07-22-2021)
#26
Rennlist Member
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All Porsche 996 and 997 cars have an integrated dry sump engine (yes, it's an actual dry sump) with two exceptions, which have a dry sump w/ external oil tank:
GT2 RS (M97.70S engine), and, GT3 RS 4.0 liter (M97.74 engine)
Source: Porsche 997 The Essential Companion
GT2 RS (M97.70S engine), and, GT3 RS 4.0 liter (M97.74 engine)
Source: Porsche 997 The Essential Companion
#27
Burning Brakes
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My understanding of the 9A1 engine is that it has a new concept for the oiling system that eliminates oil starvation while cornering, i.e. it delivers the full benefit of dry sump but in an innovative way. The system can reduce power to the oil pump while just chugging along to improve fuel economy, but them ramp up additional oil flow immediately when driven hard. Is that correct?
#28
Race Director
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yea, no, its not an actual dry sump. The oil pickup, which goes to the oil pump, sits in the sump, where the oil also resides. The primary oil pump does no scavenging. Its a wet sump, plain as day. Saying that the two scavenge pumps on the cams make it an integrated dry sump or whatever is just a bunch of marketing ****. And if you want to call it a dry sump, its a terrible one as oil starvation is an obvious and well known problem.
#29
Three Wheelin'
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The 997 gen is sort of a dry sump "integrated" but not in the true sense of the word when compared to GT cars for example .... I would call it sort of a dry sump ...
#30
Rennlist Member
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yea, no, its not an actual dry sump. The oil pickup, which goes to the oil pump, sits in the sump, where the oil also resides. The primary oil pump does no scavenging. Its a wet sump, plain as day. Saying that the two scavenge pumps on the cams make it an integrated dry sump or whatever is just a bunch of marketing ****. And if you want to call it a dry sump, its a terrible one as oil starvation is an obvious and well known problem.