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Join Date: May 2004
Posts: 232
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rpm/mph question
I noticed recently that on a relatively quick takeoff I get to 60mph in 2nd gear at about 5700/5800 rpm's. It used to be I would have to get to 6000/6100 to get to 60 in 2nd. Does this mean I'm shifting better or that some of my mods have actually improved something? Or does it mean nothing?
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85' 911 Coupe sw chip, ghl sport cat, M&K sport muffler, short shift, magnecor wires, heat sheets, cool collar, Momo anatomic leather shift knob... |
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07-19-2005, 05:53 PM
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Join Date: Jul 2001
Location: Wilmington, NC USA
Posts: 635
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Did you change tire size? Without a gear change that is the only way your RPM curve could change since it is based on the gear ratios. If you have increased Hp your throttle position my be less to get to 5800 rpm but more hp will not change the gearing.
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69 911 2.3Ez 85 928S |
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07-19-2005, 06:11 PM
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Posts: 232
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No change in tire size or gearing.
Quote:
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85' 911 Coupe sw chip, ghl sport cat, M&K sport muffler, short shift, magnecor wires, heat sheets, cool collar, Momo anatomic leather shift knob... |
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07-19-2005, 06:17 PM
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Join Date: May 2003
Location: Laguna Beach, CA
Posts: 1,405
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I bet your tach is off, hook up a timing light with a digital RPM readout to compare the two readings. This is also the best way to set the idle since it's very accurate vs the gauge.
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68 911L |
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07-19-2005, 06:35 PM
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Have you replaced or adjusted the clutch in any way? Hard acceleration in 2nd gear may have been inducing some slippage and resulting in the higher revs before.
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Swapped my WRX Sti MY02 for a Porsche 911SC '83 Keep buying parts to make it look older. Mid life crisis is now in its 12th year. |
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07-19-2005, 06:45 PM
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MYT911
part way there
