Anybody pndered a poor man's cold air intake for the unblown masses???
#1
Drifting
Thread Starter
Anybody pndered a poor man's cold air intake for the unblown masses???
Looks to me that the air intake is sucking a lot of hot air even if the car is flying down the road. That area on the deck lid looks like it might have a pretty good laminar flow down the rear window onto the deck lid. Looks like one could fabricate a little rubber inlet that you can merely slide into your existing 2" X 4" inlet to catch that high flow of cool air. The thing would 'face' up and nearly touch the underside of engine deck lid screen, sort of like the square rubber air intake on the drivers side of the deck lid. The actual opening might be on the order of 3" X 6" or so. You might have a small hole in the bottom so rain and water would drain. You would get cool, outside air no matter what your speed regime was. After the oil thermostat opens, it's always cooler outside the engine compartment than inside it. You would definitley be changing your air filter much more frequently though. Seems like it might be pretty easy to fab up out of thin plstic or aluminum to start with ...maybe we can get a rubber or plastic molding company to make them. Or maybe not..
#2
Seared
Rennlist Member
Rennlist Member
Marlon,
There is an intake 'trumpet' available through Porsche, part number: 993.110.360.51. I think it's meant to mate with the underside of the RS tail - but you could always use it as a starting point for your idea:
Andreas
There is an intake 'trumpet' available through Porsche, part number: 993.110.360.51. I think it's meant to mate with the underside of the RS tail - but you could always use it as a starting point for your idea:
Andreas
#3
Addict
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Lifetime Member
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Item # 13 is used on Turbos and AeroKit cars with a fixed tail.
My understanding is that for the moveable tail cars, the air flow hits the raised curtain and is reflected into the opening on the sports intake. If the tail is not extended, you do not have room for #13.
There is an intake temperature test on p-car.com at
http://p-car.com/diy/intake/
My understanding is that for the moveable tail cars, the air flow hits the raised curtain and is reflected into the opening on the sports intake. If the tail is not extended, you do not have room for #13.
There is an intake temperature test on p-car.com at
http://p-car.com/diy/intake/
#4
Marlon,
I had some similar thoughts. I now have a RS Cub Sport tail and thought it would be a great idea to fabricate ducting from the left side air intake to the engine air intake, but the following thread made me realise life is not so simple:
https://rennlist.com/forums/964-forum/277537-air-intake-temperatures-with-a-cup-drilled-airbox-versus-a-stock-airbox.html
Andreas,
Interestingly, I spoke with my mechanic about the RS intake trumpet. He had not seen any fitted to the 993 RS's which have come through his shop in Hong Kong. He promptly opened the lid on an RS with a Club Sport tail sitting nearby and sure enough it had no air scoop.
I had some similar thoughts. I now have a RS Cub Sport tail and thought it would be a great idea to fabricate ducting from the left side air intake to the engine air intake, but the following thread made me realise life is not so simple:
https://rennlist.com/forums/964-forum/277537-air-intake-temperatures-with-a-cup-drilled-airbox-versus-a-stock-airbox.html
Andreas,
Interestingly, I spoke with my mechanic about the RS intake trumpet. He had not seen any fitted to the 993 RS's which have come through his shop in Hong Kong. He promptly opened the lid on an RS with a Club Sport tail sitting nearby and sure enough it had no air scoop.
#5
Technical Guru
Rennlist Member
Rennlist Member
Originally Posted by TargaTango
Interestingly, I spoke with my mechanic about the RS intake trumpet. He had not seen any fitted to the 993 RS's which have come through his shop in Hong Kong. He promptly opened the lid on an RS with a Club Sport tail sitting nearby and sure enough it had no air scoop.
#6
Rennlist Member
Interesting indeed. A buddy and I were talking about such contraption this past weekend. It would look exactly like part 13 but sit flush with the grille.
The question is: what would be more effective in terms of feeding cold air into the intake, air reflecting off the spoiler wall or air funneled through the duct assuming that part #13 can be cut to sit flush with the grille?
Is there any way to test the efficiency?
The question is: what would be more effective in terms of feeding cold air into the intake, air reflecting off the spoiler wall or air funneled through the duct assuming that part #13 can be cut to sit flush with the grille?
Is there any way to test the efficiency?
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#8
Originally Posted by ROKN
Is there any way to test the efficiency?
Anyhoo, I use an open Fabspeed lid. I figure if there's any cold air around it's gonna get sucked in.
Peter R.
#9
Drifting
Thread Starter
Yes - he did. On average OAT is 10 deg. cooler than engine bay air. Guestimate is 1% power increase for each 1% inlet temp decrease. 10 degrees = 10% - that my friends, is tangible power to the rear end. For 55 bucks?!?!?
#10
Originally Posted by Marlon
Yes - he did. On average OAT is 10 deg. cooler than engine bay air. Guestimate is 1% power increase for each 1% inlet temp decrease. 10 degrees = 10% - that my friends, is tangible power to the rear end. For 55 bucks?!?!?
#11
Originally Posted by Marlon
Yes - he did. On average OAT is 10 deg. cooler than engine bay air. Guestimate is 1% power increase for each 1% inlet temp decrease. 10 degrees = 10% - that my friends, is tangible power to the rear end. For 55 bucks?!?!?
#12
Suggest people read the link I posted above. Here it is again
http://forums.rennlist.com/rennforu...ad.php?t=277537
http://forums.rennlist.com/rennforu...ad.php?t=277537
#13
Drifting
Thread Starter
This forum is full of armchair 'experts', handling dynamicists & Porsche reverse engineers, etc - what's a little more BS to further obfuscate the truth I'd rather have a few extra real HP to the rear end than the Mattel sound of Power any day...
#14
Originally Posted by Marlon
This forum is full of armchair 'experts', handling dynamicists & Porsche reverse engineers, etc - what's a little more BS to further obfuscate the truth I'd rather have a few extra real HP to the rear end than the Mattel sound of Power any day...
#15
Rennlist Member
Originally Posted by Marlon
This forum is full of armchair 'experts', handling dynamicists & Porsche reverse engineers, etc - what's a little more BS to further obfuscate the truth ...
As an FYI, my data logged testing at speed showed a couple hp loss with the RS snorkel versus the open (cup) airbox due to the added flow restriction. That appears to contradict your 'expert' conclusion.