04-20-2011, 02:49 AM
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#1
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Registered User
Join Date: Apr 2010
Location: South Africa, Cape Town
Posts: 131
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shifting rpm
Hi Guys,
this is probably a silly question, but what is the optimun rpm to shift at on a 2000 S 3.2L?
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de-snorkeled, clear lights, sports exhaust, zeintec hard top, zein wing, B&M short shifter, DesignTek lowering springs, DesignTek carbon fibre strut brace front and rear, 18'' carerra 5 spokes, semi slick tyres, entire soft top delete, engine cover delete,red console,L&N deep sump, volo performance chip, raptor shift light, de-cat'ed, OEM GT3 bucket seats.
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04-20-2011, 05:54 AM
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#2
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Porscheectomy
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
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Optimum what? Acceleration, economy, longevity?
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04-20-2011, 06:40 AM
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#3
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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7,000rpm seems to be the funnest! 
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04-21-2011, 12:42 AM
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#4
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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Once fully warmed up (~ 10 miles)...
Around town = 3,500 - 4000 rpm.
Open road = 4,500 - 5,500 rpm.
Never above 6,500 rpm, its not worth the effort - but thats just me....
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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04-21-2011, 08:51 PM
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#5
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Registered User
Join Date: Apr 2010
Location: South Africa, Cape Town
Posts: 131
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shifting
Sorry, to make it clear: was meaning what rpm to shift at for the best 0-100km/h / 0-60miles/h time.
__________________
de-snorkeled, clear lights, sports exhaust, zeintec hard top, zein wing, B&M short shifter, DesignTek lowering springs, DesignTek carbon fibre strut brace front and rear, 18'' carerra 5 spokes, semi slick tyres, entire soft top delete, engine cover delete,red console,L&N deep sump, volo performance chip, raptor shift light, de-cat'ed, OEM GT3 bucket seats.
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04-21-2011, 09:14 PM
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#6
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Porscheectomy
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
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Quote:
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Originally Posted by sickbananas
Sorry, to make it clear: was meaning what rpm to shift at for the best 0-100km/h / 0-60miles/h time.
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Redline. The torque at the wheels is always highest in the lowest gear at full throttle.
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04-22-2011, 02:45 PM
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#7
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Administrator
Join Date: Mar 2011
Location: California
Posts: 23
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Rpm
Quote:
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Originally Posted by sickbananas
Hi Guys,
this is probably a silly question, but what is the optimun rpm to shift at on a 2000 S 3.2L?
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This is a perfect excuse to get some track time. I would test some of the theory's at an Autocross event with your local PCA if you haven't already. They are inexpensive to do and a lot of fun especially if you have never gone before. Be carefull though because it could lead to what I call "track Addiction" which is not a bad thing in my humble opinion.
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04-23-2011, 07:21 AM
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#8
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Registered User
Join Date: Apr 2008
Location: Southern New jersey
Posts: 1,054
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All you need to find out is a stopwatch, preferrably with a friend operating it. Time from a rolling start (to eliminate any launch variations) , to a predetermined speed, say 15-85 MPH, that will give 2 shifts, ending in 3rd without going to redline.
Generally speaking, you want the largest area under the H.P. curve. To do this you want the H.P before and after the shift to be roughly equal. With every HP curve/gearing combination I've seen, that means shifting past peak HP by 500 RPM or so.
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