Engine Difference - Base/S /GTS
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Burning Brakes
Joined: May 2006
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Engine Difference - Base/S /GTS
As all three cars have the same base 3liters - Is the only real difference in the three motors turbo size and boost pressure? Or are there other differences in the internals?
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From: Orlando burbs
Besides the bigger turbos and revised PCM software, assuming it has PSE, my recollection is the X51 Power Kit to convert the S engine to GTS spec also includes a different PCV valve and brake cooling ducts.
All of this is not saying that everything on the base is the same as on the S and GTS.
All of this is not saying that everything on the base is the same as on the S and GTS.
Thread Starter
Burning Brakes
Joined: May 2006
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I'll need to do some research, but I'm curious if any of the internals are meaningfully different from base to GTS. These new turbo motors offer fascinating potential and to me it's even more facinating if these motors are the same other than turbo's and obviously tune. Bore, stroke, intake valves, exhaust valves are the same. Just curious what the differences are.
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From: The Cloud
I'll need to do some research, but I'm curious if any of the internals are meaningfully different from base to GTS. These new turbo motors offer fascinating potential and to me it's even more facinating if these motors are the same other than turbo's and obviously tune. Bore, stroke, intake valves, exhaust valves are the same. Just curious what the differences are.
Race Car
Joined: Nov 2013
Posts: 4,071
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From: Austin, TX
Scanning through the 2017 Service Information Technik Introduction manual, there are no core engine differences called out, beyond the turbos, the exhaust, and the tune.
Oddly enough, that manual says that 2017 Carrera S PDKs come with a center radiator, but someone must have changed their mind on that since mine does not.
Oddly enough, that manual says that 2017 Carrera S PDKs come with a center radiator, but someone must have changed their mind on that since mine does not.
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Thread Starter
Burning Brakes
Joined: May 2006
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Thanks
Jeff
Race Car
Joined: Nov 2013
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From: Austin, TX
Just FYI, here's a little more detail on the difference in the turbos between the base, the S, and the GTS
9A2 3.0 991.2 Carrera
Turbos: 49mm compressor/45mm turbine
9A2 3.0 991.2 Carrera S
Turbos: 51mm compressor/45mm turbine
9A2 3.0 991.2 Carrera GTS
Turbos: 55mm compressor/48mm turbine
And this quote: "...the engines are effectively all the same thing. Porsche is sharing parts and cutting costs. The only real difference is the turbocharger sizes, boost pressure, and tuning"
Info pulled from this article: https://www.************.com/content...ocharger-sizes
9A2 3.0 991.2 Carrera
Turbos: 49mm compressor/45mm turbine
9A2 3.0 991.2 Carrera S
Turbos: 51mm compressor/45mm turbine
9A2 3.0 991.2 Carrera GTS
Turbos: 55mm compressor/48mm turbine
And this quote: "...the engines are effectively all the same thing. Porsche is sharing parts and cutting costs. The only real difference is the turbocharger sizes, boost pressure, and tuning"
Info pulled from this article: https://www.************.com/content...ocharger-sizes
Rennlist Member
Joined: Jul 2012
Posts: 7,928
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From: US
While were on differences, thoughts on brakes?
991.2 Base has 330mm 4-piston front and rear (same as 997 generation S)
991.2 S has 350mm 6-piston front, 330mm 4-piston rear. (same as 997 generationTurbo)
Has anyone found the 4-pot 330's lacking in any situations other than perhaps sticky-tire track days? And for those your likely upgrading rotors and pads regardless of the 330 4 pot vs. 350 6 pot fronts.
Other than cool red calipers, could a mere mortal feel the difference between the base and S brakes on aggressively driven but public roads?
Disclaimer: Clearly I have a hidden agenda, convincing myself that a 991.2 base with a few minor tweaks won't leave me missing my current 996 Turbo very much if I do the swap! ;-)
991.2 Base has 330mm 4-piston front and rear (same as 997 generation S)
991.2 S has 350mm 6-piston front, 330mm 4-piston rear. (same as 997 generationTurbo)
Has anyone found the 4-pot 330's lacking in any situations other than perhaps sticky-tire track days? And for those your likely upgrading rotors and pads regardless of the 330 4 pot vs. 350 6 pot fronts.
Other than cool red calipers, could a mere mortal feel the difference between the base and S brakes on aggressively driven but public roads?
Disclaimer: Clearly I have a hidden agenda, convincing myself that a 991.2 base with a few minor tweaks won't leave me missing my current 996 Turbo very much if I do the swap! ;-)
Drifting
Joined: Dec 2013
Posts: 2,215
Likes: 972
From: Connecticut
While were on differences, thoughts on brakes?
991.2 Base has 330mm 4-piston front and rear (same as 997 generation S)
991.2 S has 350mm 6-piston front, 330mm 4-piston rear. (same as 997 generationTurbo)
Has anyone found the 4-pot 330's lacking in any situations other than perhaps sticky-tire track days? And for those your likely upgrading rotors and pads regardless of the 330 4 pot vs. 350 6 pot fronts.
Other than cool red calipers, could a mere mortal feel the difference between the base and S brakes on aggressively driven but public roads?
Disclaimer: Clearly I have a hidden agenda, convincing myself that a 991.2 base with a few minor tweaks won't leave me missing my current 996 Turbo very much if I do the swap! ;-)
991.2 Base has 330mm 4-piston front and rear (same as 997 generation S)
991.2 S has 350mm 6-piston front, 330mm 4-piston rear. (same as 997 generationTurbo)
Has anyone found the 4-pot 330's lacking in any situations other than perhaps sticky-tire track days? And for those your likely upgrading rotors and pads regardless of the 330 4 pot vs. 350 6 pot fronts.
Other than cool red calipers, could a mere mortal feel the difference between the base and S brakes on aggressively driven but public roads?
Disclaimer: Clearly I have a hidden agenda, convincing myself that a 991.2 base with a few minor tweaks won't leave me missing my current 996 Turbo very much if I do the swap! ;-)
Rennlist Member
Joined: Feb 2013
Posts: 1,088
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From: Edmonton, Alberta
While were on differences, thoughts on brakes?
991.2 Base has 330mm 4-piston front and rear (same as 997 generation S)
991.2 S has 350mm 6-piston front, 330mm 4-piston rear. (same as 997 generationTurbo)
Has anyone found the 4-pot 330's lacking in any situations other than perhaps sticky-tire track days? And for those your likely upgrading rotors and pads regardless of the 330 4 pot vs. 350 6 pot fronts.
Other than cool red calipers, could a mere mortal feel the difference between the base and S brakes on aggressively driven but public roads?
Disclaimer: Clearly I have a hidden agenda, convincing myself that a 991.2 base with a few minor tweaks won't leave me missing my current 996 Turbo very much if I do the swap! ;-)
991.2 Base has 330mm 4-piston front and rear (same as 997 generation S)
991.2 S has 350mm 6-piston front, 330mm 4-piston rear. (same as 997 generationTurbo)
Has anyone found the 4-pot 330's lacking in any situations other than perhaps sticky-tire track days? And for those your likely upgrading rotors and pads regardless of the 330 4 pot vs. 350 6 pot fronts.
Other than cool red calipers, could a mere mortal feel the difference between the base and S brakes on aggressively driven but public roads?
Disclaimer: Clearly I have a hidden agenda, convincing myself that a 991.2 base with a few minor tweaks won't leave me missing my current 996 Turbo very much if I do the swap! ;-)
.2 C has same rotor diameter as .1 S, but thicker rear brakes.
More than enough brakes for me for a non-tracked car.
Rennlist Member
Joined: Jul 2012
Posts: 7,928
Likes: 3,143
From: US
Go for a test drive and let us know how you feel about either one.