08-04-2007, 07:28 PM
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#1
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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Why are you driving your car in those gears at less than 1600 rpms!!
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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.
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08-05-2007, 04:30 AM
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#2
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Registered User
Join Date: Nov 2003
Location: Illinois
Posts: 3,033
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Quote:
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Originally Posted by Paul
Why are you driving your car in those gears at less than 1600 rpms!!
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He must have skipped that page in the manuel that says don't lug the engine under 1,500 rpm! I see people on here all the time saying they do this  Maybe it's a gas mileage thing.
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08-05-2007, 06:45 AM
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#3
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Registered User
Join Date: May 2007
Location: Manassas, VA
Posts: 203
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Quote:
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Originally Posted by Adam
He must have skipped that page in the manuel that says don't lug the engine under 1,500 rpm! I see people on here all the time saying they do this Maybe it's a gas mileage thing. |
The automatic transmission will sometimes shift me to a higher gear and put me at sub 1600 RPM land.
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08-05-2007, 02:29 PM
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#4
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Registered User
Join Date: Nov 2003
Location: Illinois
Posts: 3,033
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Quote:
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Originally Posted by JCL12
The automatic transmission will sometimes shift me to a higher gear and put me at sub 1600 RPM land.
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That's kind of odd. Porsche says don't lug the engine and that's exactly what the auto tranny does sometimes? I thought that tip transmission was supposed to be smarter than the average guy.
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08-05-2007, 07:50 PM
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#5
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Registered User
Join Date: May 2007
Location: Manassas, VA
Posts: 203
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Adam,
If I am accerelating very slowly, the auto shift points will sometimes come too early.
BTW - Why would there be an issue with running the engine in sub 1500 RPM range? Idle is sub 1K, starting in 1st or 2nd spends a lot of time <1500RPM. I dont get it!
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08-06-2007, 09:29 AM
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#6
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Registered User
Join Date: Nov 2003
Location: Illinois
Posts: 3,033
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Quote:
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Originally Posted by JCL12
Adam,
If I am accerelating very slowly, the auto shift points will sometimes come too early.
BTW - Why would there be an issue with running the engine in sub 1500 RPM range? Idle is sub 1K, starting in 1st or 2nd spends a lot of time <1500RPM. I dont get it!
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It's ok to spend some time under 1,500 rpm...we all have to do that like when taking off or going around a curve, but you don't want to spend an excessive amount of time there. What Porsche says not to do is lug the engine. Meaning don't drive it 40mph in 5th or 6th gear for example. There is very little load on the engine at idle so that would not apply. I'm not sure why exactly Porsche says to avoid this, maybe someone else on here can shed some light on it.
Last edited by Adam; 08-06-2007 at 09:32 AM.
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