11-05-2006, 07:28 PM
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#1
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Registered User
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
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Quote:
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Originally Posted by blue2000s
The fuel is primarily sprayed onto the intake valve not to cool it, but to enhance the atomization of the fuel. It is a side benefit that the heat from the valve is carried away by the air/fuel. The valve is also cooled by the air/fuel rushing past it on the intake stroke. FSI engines show that the intake valve can opperate just fine without spraying fuel on them.
Typically, it's the exhaust valve that has the cooling problems as the hot gasses of combustion run past it and the valve's size is somewhat smaller than the intake. This is why you'll find sodium filling in exhaust valves and not on the intake side.
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Hi,
I actually meant the AF mix, guess I oversimplified. I know the Boxster has Sodium-filled Exhaust Valves, so does my Esprit...
Happy Motoring!... Jim'99
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11-06-2006, 05:09 AM
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#2
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Registered User
Join Date: May 2006
Location: Northeast USA
Posts: 910
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On the highway, the straights, and mostly when my fiance is with me I keep it between 3k-5k. On the twisties, and especially when riding solo, the 5k+ growl informs me about the area to shift. Few times during a run, I'll take it to 6.5k. On the track, the needle rarely goes below 4.5k. There's something about this car that makes high rpms so inviting and right.
Z.
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11-06-2006, 05:47 AM
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#3
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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yea,..not every car likes to be in high rpms but wow do these cars like it 
__________________
http://i34.tinypic.com/157yslk.jpg
"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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11-06-2006, 06:28 PM
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#4
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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It's not mine, but here's a happy Porsche:
In Germany they are driven this way for hours with no ill effects!
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
Last edited by Paul; 11-06-2006 at 06:56 PM.
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11-06-2006, 07:17 PM
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#5
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Registered User
Join Date: Sep 2006
Location: chicago
Posts: 3,510
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thats awesome i hate when people drive their cars like old grandmas. heck u live once, mite as well enjoy it while ure down here
__________________
http://i34.tinypic.com/157yslk.jpg
"I couldn't find the sports car of my dreams, so I built it myself." ~F. Porsche
Gemballa springs::litronics::Eurotech 18s(275/225)::B&M::MOMO wheel::
exhaust cutouts::EVOcoldair intake::OEM smoked tails & sidemarkers::
colormatched bumperettes::Top Speed Pro-1 exhaust::
my cardomain/pictures page
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11-07-2006, 05:54 AM
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#6
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Registered User
Join Date: Jun 2004
Location: Des Moines, IA
Posts: 8,083
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Quote:
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Originally Posted by djomlas
thats awesome i hate when people drive their cars like old grandmas. heck u live once, mite as well enjoy it while ure down here
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The same could be said for learning how to spell and write correctly.
__________________
Rich Belloff
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11-07-2006, 12:04 PM
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#7
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Registered User
Join Date: Sep 2006
Location: Levittown, ny
Posts: 35
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Quote:
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Originally Posted by Brucelee
The same could be said for learning how to spell and write correctly.
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HAHAHAHA Thank you, that made my day... You know we were all thinking it.
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03-18-2008, 09:48 AM
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#8
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Registered User
Join Date: Jul 2007
Location: Arcadia CA
Posts: 91
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i just redline a couple times a day to keep the engine clean
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