Fergus,
Here's spreadsheet that allows you to input the diff ratio, tire size, and
tranny gears, and calculates rpm/speed in each gear.
www.mildevco.net/gear_ratio_rpm.xls ( right-click, save target as...)
I'm sure someone on the list can provide the ratios for each gear in a stock
5-spd?
Mark Sedlack
ZROC / OROC
Cuyahoga Falls OH
66 1600 http://www.mildevco.net/chevypowereddatsuns/
77 280Z http://www.mildevco.net/chevypowereddatsuns/
----- Original Message -----
From: "O'Farrell, Fergus" <Fergus.OFarrell@ngc.com>
To: <datsun-roadsters@autox.team.net>
Sent: Wednesday, July 06, 2005 8:20 AM
Subject: Spreadsheet of rpm vs speed, 5 speed??
> Does anyone happen to have a table or spreadsheet of rpms vs speed (I
> know, tire size diff's, I just need a ballpark) for a 5 spd and stock
> U-20 rear end? My speedo has always just bounced happily along, and I
> ignore it, I just drive with traffic. Well, on a long, sweeping, 2 lane
> fwy transition I got a little too excited and passed a line of cars, and
> got scolded (at 50+ mph) by a motorcycle cop. I guess I'd better
> acquire a better reference for my ealry morning, deserted fwy drives.
> (4000 rpm in 5th seems to be ~80, 3200 is ~70-75?) Sorry if this is a
> repeat.
> Thanks, Fergus O, 69 2000, HB, CA
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