Notices
991 GT3 GT3RS and 911R
Sponsored by:

Speedster - Calling All Cleaning Ladies

 
Old 02-13-2019, 01:33 PM
  #1516  
Whoopsy
Addict
Rennlist Member
 
Whoopsy's Avatar
 
Join Date: Aug 2006
Location: Vancouver, BC
Posts: 1,963
Default

Originally Posted by GrantG View Post
Of course, the GT3 gets the RS motor also (just electronically detuned by 20hp)

The Speedster may get a particle filter that makes final power fall somewhere between 500 (GT3) and 520 (RS), hence the More than 500hp language - but all the same motor...
GT3RS gets better breathing from the side intake to make a little bit more power. Speedsters won't have those side intakes.
Whoopsy is offline  
Old 02-13-2019, 01:53 PM
  #1517  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 9,515
Default

Originally Posted by Whoopsy View Post
GT3RS gets better breathing from the side intake to make a little bit more power. Speedsters won't have those side intakes.
Yes, but that is not part of the RS' rated power - all the ram-air benefits are on top of the 520hp (which it makes with car not moving).
GrantG is offline  
Old 02-13-2019, 03:15 PM
  #1518  
Gravs
Addict
Rennlist Member
 
Gravs's Avatar
 
Join Date: Apr 2012
Location: London
Posts: 1,288
Default

I'm sceptical about the ram air being better at the sides (RS) than over top of car (GT3). They said it was less interrupted airflow or something but why should air be better on sides as to on top?! Sides are more affected by cornering, have wing mirrors, door handles, tyres etc!

Marketing fluff if you ask me.
Gravs is offline  
Old 02-13-2019, 03:35 PM
  #1519  
djcxxx
Addict
Rennlist Member
 
djcxxx's Avatar
 
Join Date: Jun 2005
Location: Florida
Posts: 1,492
Default

With that rear deck bubble wrapping is the perfect destiny.
djcxxx is online now  
Old 02-13-2019, 04:23 PM
  #1520  
Taffy66
User
 
Join Date: Dec 2017
Posts: 286
Default

Originally Posted by Gravs View Post
I'm sceptical about the ram air being better at the sides (RS) than over top of car (GT3). They said it was less interrupted airflow or something but why should air be better on sides as to on top?! Sides are more affected by cornering, have wing mirrors, door handles, tyres etc!

Marketing fluff if you ask me.
I agree 100% with this..I have fitted high flow BMC air filters in my 991.2GT3 with a JCR bypass which results in close to RS power IMHO.
Taffy66 is offline  
Old 02-13-2019, 04:28 PM
  #1521  
Marcus S.
User
 
Marcus S.'s Avatar
 
Join Date: Jun 2014
Location: Europe
Posts: 197
Default

Originally Posted by BrntRubber View Post


I can’t see heritage costing more than WP on the 2RS, but what do I know.

I was certainly wanting to buy the Speedster and with a confirmed spot. At this type of price I may pass. Not twice as nice as a touring
Which production month do you have on your allocation?
Marcus S. is offline  
Old 02-13-2019, 05:16 PM
  #1522  
Whoopsy
Addict
Rennlist Member
 
Whoopsy's Avatar
 
Join Date: Aug 2006
Location: Vancouver, BC
Posts: 1,963
Default

Originally Posted by Gravs View Post
I'm sceptical about the ram air being better at the sides (RS) than over top of car (GT3). They said it was less interrupted airflow or something but why should air be better on sides as to on top?! Sides are more affected by cornering, have wing mirrors, door handles, tyres etc!

Marketing fluff if you ask me.
Air has mass, it doesn't changes direction easily without help, i.e. surfaces like wings and body panels.

The air flow on the side of the car is of higher velocity, it follows the side of the car, and when it hits the rear fenders it still want to go straight, that's where the air intake holes are.

The air at the base of the rear window is more staled so to speak. when air leaves the roof line it doesn't go straight down and hug the rear window, it stays off a little bit and majority of it get redirected by the rear wing. The scoops on top are needed to redirect enough air for the engine. One can see that effect from wind tunnel footage, the smoke lie hugs the roofline but does't drop immediately back dow not the rear window.
Whoopsy is offline  
Old 02-13-2019, 06:15 PM
  #1523  
Jrtaylor9
Addict
Rennlist Member
 
Join Date: Aug 2012
Location: London / NYC
Posts: 2,023
Default

They are already advertising a June allocation flip in the UK.
Jrtaylor9 is offline  
Old 02-13-2019, 06:38 PM
  #1524  
GiuseppeM
User
 
GiuseppeM's Avatar
 
Join Date: Aug 2015
Posts: 1,195
Default

Originally Posted by Jrtaylor9 View Post
They are already advertising a June allocation flip in the UK.
can you share the ad? For a laugh obviously
GiuseppeM is online now  
Old 02-13-2019, 06:47 PM
  #1525  
Gravs
Addict
Rennlist Member
 
Gravs's Avatar
 
Join Date: Apr 2012
Location: London
Posts: 1,288
Default

Originally Posted by Taffy66
I agree 100% with this..I have fitted high flow BMC air filters in my 991.2GT3 with a JCR bypass which results in close to RS power IMHO.
Maybe the real reason is the widebody fenders already had holes in
Gravs is offline  
Old 02-13-2019, 06:49 PM
  #1526  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 9,515
Default

Originally Posted by Gravs View Post
Maybe the real reason is the widebody fenders already had holes in
I actually never considered that, but makes perfect sense to economize on the number of parts variants for the wide-body rear quarter panels

I agree with Whoopsy that the side intakes probably promote a bit better inlet pressure, but I wonder whether the difference is enough to bother, if the holes weren’t already there...
GrantG is offline  
Old 02-13-2019, 08:35 PM
  #1527  
sunnyr
Addict
Rennlist Member
 
sunnyr's Avatar
 
Join Date: Mar 2011
Location: Bay Area, CA
Posts: 1,184
Default

Like Whoopsy said, behind the greenhouse there is a low pressure area cause of the air flow separation causing turbulent flow vs the side where the fenders holes are right in the flow. The only better place I can think of besides fender would be on the top of the roof ala GT1.



The wing on the GT3 would make it even worse cause of the low pressure area under the wing which should suck air away from the intakes.



Disclaimer - I got my aero degree from youtube, so caveat lector.
sunnyr is offline  
Old 02-13-2019, 08:38 PM
  #1528  
Drifting
Addict
Rennlist Member
 
Drifting's Avatar
 
Join Date: Oct 2013
Location: LA
Posts: 3,123
Default

Originally Posted by Gravs View Post
Maybe the real reason is the widebody fenders already had holes in
i completely considered that. I’m 90% sure that’s why they did it. Porsche can be very cheap at times to maintain their profit margin.

I bet the speedster basically gets the RS engine, maybe makes 515 hp so as not to show up the RS.
Drifting is offline  
Old 02-13-2019, 08:53 PM
  #1529  
Whoopsy
Addict
Rennlist Member
 
Whoopsy's Avatar
 
Join Date: Aug 2006
Location: Vancouver, BC
Posts: 1,963
Default

Originally Posted by GrantG View Post

I actually never considered that, but makes perfect sense to economize on the number of parts variants for the wide-body rear quarter panels

I agree with Whoopsy that the side intakes probably promote a bit better inlet pressure, but I wonder whether the difference is enough to bother, if the holes weren’t already there...
They actually have 3 different fenders widths. Turbo cars has he widest and C2 has the narrowest. GT3, 911R, share the S fenders.

Now consider this, those IPD plenums are smoother and flows better than stock ones, if a part that small already have an effect on HP, those holes on the side certainly helps, even at lower speed.
Whoopsy is offline  
Old 02-13-2019, 10:40 PM
  #1530  
evilfij
Addict
Rennlist Member
 
evilfij's Avatar
 
Join Date: Apr 2008
Location: On the internet
Posts: 4,106
Default

Originally Posted by Whoopsy View Post
They actually have 3 different fenders widths. Turbo cars has he widest and C2 has the narrowest. GT3, 911R, share the S fenders.

Now consider this, those IPD plenums are smoother and flows better than stock ones, if a part that small already have an effect on HP, those holes on the side certainly helps, even at lower speed.
S and C2 have the same fenders. GT3, 911R, C4, C4S, and GTS share the same middle width fender.
evilfij is offline  

Thread Tools
Search this Thread
Quick Reply: Speedster - Calling All Cleaning Ladies


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: