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Montoya is such a controversial thread starter!
hehehe
Hahaha! Curious minds want to know...
Originally Posted by GrantG
My vote is for ECU at near 100% responsibility
I tend to agree, but their is a little better breathing too...
Originally Posted by shamoo
I'll throw out a totally useless comment here.
It is totally conceivable that there is zero difference in the motor and it is all just air/exhaust differences. The advertised power of my Honda Accord Sport is 5hp higher than the base version. There is zero difference except for a dual exhaust (which is actually much heavier). But hey, it is more "free flowing" so they advertise a 5hp higher number.
20hp on a Porsche could make sense easily with some additional airflow.
See above, I think it's mostly tuning.
Thanks for all the thoughtful posts! As I said, I'm just curious what are the differences between the two. From some of the side by side drags, the extra torque and power are coming in at a fairly low speed so I also agree with others that point out the ram air impact is low and probably not part of the rated extra 20 HP.
So here's a further puzzle- Take an RS and a GT3, add improved exhaust like Dundon, GMG or Akra, and a tune on both. Are they now equal in performance up to the point of the ram air effect?
The side scoops are functional. The wider rear fender flares create a high pressure zone ahead of them that the side scoops can effectively exploit. No such high pressure zone exists without the fender flair, so flush mounted intakes (ie early boxster) will be far less effective.
The turbo doesn't need a ram-air effect. It's sucking in as much air as it wants and far more than could be pushed in at any speed.
This is incorrect. Look at any front mount turbo application on a drag car and you will see an appreciable difference in pressure at speed vs. a static test.
Seriously though...I wonder if they've handicapped the throttle opening on the GT3 just like they did on the GT4... I also wonder if the upper plenum/intake is the same : I mean,the RS is obviously getting the air in differently...
...or .... you overcooked that turn on the mountain pass (Stelvio, Gloss.?) and wanted to know if upgrading to an RS would have saved you!
Not a mind reader, just guessing based on readings here
Originally Posted by montoya
Hahaha! Curious minds want to know...
...
So here's a further puzzle- Take an RS and a GT3, add improved exhaust like Dundon, GMG or Akra, and a tune on both. Are they now equal in performance up to the point of the ram air effect?
Originally Posted by Perimeter
Montoya is such a controversial thread starter!
hehehe
The reason the intake diagrams for turbos don’t show the side scoops is because those scoops were used to feed air across the outside of the inter coolers to cool the air charge inside, not to feed intake air. Hence they were designed to create air flow with no sucking from the engine. That started with the 993 because that is when the design changed from a single turbo with a top mounted intercooler to twin turbos with side mounted intercoolers in the rear fenders. The intercoolers are cooled by car movement, no fans, no engine suction, so they are efficient. Ram air effect, hmm probably not, but an engine is just an air pump, so if flow is easier through the side scoops versus the top scoops, due to size, tube reduction under the hood, bending, etc. that could add HP but as was said the 20+ was measured on a stand, no car intake scoops attached. That power comes from somewhere else. Honestly we are talking about a 4% difference. Lol
On ED, you're feeling like the GT3 can't get any better!
I too wonder about the huge price difference on the RS over the GT3 with such close power levels
The difference in price is the price you have to pay to join the .2 RS club. If you don't care about joining the club and just care about driving then it really won't matter. You get to save $45K and get to enjoy your .1 or .2 GT3 or .1 RS.
...or .... you overcooked that turn on the mountain pass (Stelvio, Gloss.?) and wanted to know if upgrading to an RS would have saved you!
Not a mind reader, just guessing based on readings here
Originally Posted by Raghu
The difference in price is the price you have to pay to join the .2 RS club. If you don't care about joining the club and just care about driving then it really won't matter. You get to save $45K and get to enjoy your .1 or .2 GT3 or .1 RS.
Hahaha! No, I love my GT3 and would not and did not choose an RS over it. I personally like the clean lines of the GT3 without the extra fender slats and scoops. But hp is hp and well, we just want to know, what and how?!
Location: The way to hell is paved by good intentions “Wenn ich Purist höre...entsichere ich meinen Browning” "Myths are fuel for marketing (and nowadays for flippers too,,,)" time to time is not sufficient to be a saint, you must be also an Hero
within naturally aspirated 991.1 991.2 base and S/GTS models and sport GT3 GT3RS and R models
all have the same air filter design
the only different NA air filter is the Touring one
Porsche has updated the PET to include the 991.2 GT3 RS. The part numbers for the engine for the GT3 and RS are the same. It's all programming, and possibly intake.
Porsche has updated the PET to include the 991.2 GT3 RS. The part numbers for the engine for the GT3 and RS are the same. It's all programming, and possibly intake.
Regarding the Ram Air Effect... I do recall AP mentioning, when he was talking about the 991.1 GT3 RS a few years back, that while the (.1) engine is rated at 500hp on the dyno, it pushes out more at speed due to the Ram Air Effect.
I wish I could find that video, but I'm unable to at the moment.
09-28-2018, 05:38 PM
