if a 911 has this "inlet" above the rear wheels is that a special model ? eg special engine ?
(not neccesary including the louvres in the rearspoiler below)
thanks, Joeri
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| Author: | jeejee [ Sat Jan 06, 2007 7:04 pm ] |
| Post subject: | stef ? porsche question |
if a 911 has this "inlet" above the rear wheels is that a special model ? eg special engine ? (not neccesary including the louvres in the rearspoiler below) thanks, Joeri
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| Author: | 2slow [ Sat Jan 06, 2007 10:37 pm ] | ||
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Hi Joeri, what you see above is a 911 Turbo. The air inlet is for the intercooler (to cool down the compressed charge air). Cooling air is sucked in in front of the wheels, ducted over the wheels to the intercoolers (behind the wheels) and exit out the slits on the lower bumper. The reason why I say "sucked" is that air evacuation depends largely on the low pressure area around the air exit slits. Air supply for the combustion process is central on top of the spoiler. RUF uses narrow-bodied cars for his Turbo conversion and does not have the space to duct the air over the rear wheels. He cuts openings above/behind the wheels for his intercooler intakes. [/img]
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| Author: | BenZ28 [ Sun Jan 07, 2007 6:17 pm ] |
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2slow wrote: RUF uses narrow-bodied cars for his Turbo conversion and does not have the space to duct the air over the rear wheels. He cuts openings above/behind the wheels for his intercooler intakes.
[/img] I recently saw Ruf on TV and he said that the reason (also) was to avoid the rear brakes area, so not heating up the air...(?) Ben |
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| Author: | 2slow [ Sun Jan 07, 2007 8:01 pm ] |
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I don't quite understand what you are saying (or what you understood about what Ruf was saying). The 911 rear brakes are cooled by air scooped under the car, directed into the centre if the disks and sucked out through the wheel spokes (due to the low pressure area caused by air accelerated around the rear wheel-arches). On a narrow body, you have no option but to do what Ruf did to get air to the intercoolers. However, it is not a very good place to fetch air (I have spent untold hours in the Porsche windtunnel optimizing the 997 bodyshape, so I think I have a good knowledge of the vehicle's shape). Although Alois Ruf is a good friend of mine, I have to say that he is slightly "adventurous" when it comes to aerodynamics (stick some wool tufts on the body and blast down the Autobahn). |
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| Author: | Roy [ Sun Jan 07, 2007 8:02 pm ] |
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Quote: Although Alois Ruf is a good friend of mine, I have to say that he is slightly "adventurous" when it comes to aerodynamics (stick some wool tufts on the body and blast down the Autobahn).
That works for me. |
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| Author: | BenZ28 [ Thu Jan 11, 2007 10:13 am ] |
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2slow wrote: intercoolers. However, it is not a very good place to fetch air (I have spent untold hours in the Porsche windtunnel optimizing the 997 bodyshape, so I think I have a good knowledge of the vehicle's shape).
What he was saying is that it is even a better place than stock, as the air would not get as warm as it would with the stock solution. He explained that with the path of the air which (in his solution) wouldn't come as near to the rear brakes area as in the stock Porsche. If that is all making sense I don't know... 
Ben |
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| Author: | Squirrelina [ Thu Jan 11, 2007 6:05 pm ] |
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If I had the money to buy me a Porsche I would not care where the air flows as long as the car stays on the road 
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| Author: | jeejee [ Thu Jan 11, 2007 10:18 pm ] |
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 well the thing is, last year in the beginning of the summer i had an encouter with that type of porsche (in my cosworth powerd opel)and we raced from 30km/h upto some 220 orso and we where equally quick, he was a little quicker with gearchange and i gained on him through the gears.
he was quite upset and didn't even look at me when we stopped next to eachother at the next stoplight. he drove off very slowly at the light, his blonde girlfriend was quite amused, and smiled at me . According to the vehicle registration the car was sold several weeks later
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| Author: | 2slow [ Fri Jan 12, 2007 12:07 am ] |
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I doubt... With 550 bhp and 830 Nm torque a RUF RTurbo would chew your ass away. I wonder if you did not square up to a regular 911 with optional factory brake cooling ducts on the side panels. |
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| Author: | 2slow [ Fri Jan 12, 2007 12:17 am ] | ||
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Talk of side intakes..... This is what the new Boxster were intended to look like, but we could not make the air intakes work.
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| Author: | Garry [ Fri Jan 12, 2007 5:36 am ] |
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wow, cool! 
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| Author: | Roy [ Fri Jan 12, 2007 8:16 am ] |
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Whew Look at that, almost prototype copycats. Must of been some artistic design blockage going on. 
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| Author: | jeejee [ Fri Jan 12, 2007 12:59 pm ] |
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2slow wrote: I doubt...
With 550 bhp and 830 Nm torque a RUF RTurbo would chew your ass away. I wonder if you did not square up to a regular 911 with optional factory brake cooling ducts on the side panels. i didn't say it was a ruf , but it was the one on the above picture i posted and according to the vehicle registration it was a turbo
(i have raced against several normal aspirated 3.6 and 3.8's but these were never that fast on acceleration) and 427hp and 520nm in a 900kilogram car would give a 550hp 1500 kilogramm car a pretty close race i think
it's not pretty but functional for it's purpose : 
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| Author: | Lancer033 [ Fri Jan 12, 2007 4:08 pm ] |
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Roy wrote: Whew
Look at that, almost prototype copycats. Must of been some artistic design blockage going on.  of course, they'll never admit coping a chevy
it's a nice design, to bad their engineers couldn't make it work
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| Author: | jinstall [ Fri Jan 12, 2007 4:26 pm ] |
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jeejee wrote: 2slow wrote: I doubt... With 550 bhp and 830 Nm torque a RUF RTurbo would chew your ass away. I wonder if you did not square up to a regular 911 with optional factory brake cooling ducts on the side panels. i didn't say it was a ruf , but it was the one on the above picture i posted and according to the vehicle registration it was a turbo (i have raced against several normal aspirated 3.6 and 3.8's but these were never that fast on acceleration) and 427hp and 520nm in a 900kilogram car would give a 550hp 1500 kilogramm car a pretty close race i think it's not pretty but functional for it's purpose : SWEET! I wonder if I can stuff that into a Focus RS? Opps I was not supposed to say that outloud...... |
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| Author: | 2slow [ Fri Jan 12, 2007 6:31 pm ] |
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I expected Lancer to talk smack, but not Roy to stab me........ OUCH!! |
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| Author: | Roy [ Fri Jan 12, 2007 8:13 pm ] |
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Hey I'm just a dumb second rate mechanic. What do I know? |
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| Author: | jinstall [ Tue Jan 16, 2007 11:47 am ] |
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OK forget the FOcus RS comment, it is dead. Oh well wishful thinking. |
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| Author: | Lancer033 [ Tue Jan 16, 2007 4:25 pm ] |
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I thought you were going to borrow a cyclone engine? |
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| Author: | jinstall [ Wed Jan 17, 2007 4:38 pm ] |
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LOL funny thing is that it would fit with no problem. Ryan you want to do a RWD 4.3 turbo conversion on a C170? |
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