[Spridgets] Speed vs RPM question...

[Dean Hedin]

Go to:
http://bgsoflex.com/auto.html

Then scroll down on the left to rpm range program...

Here is a sample output.  The key item is to go measure you tire diameter.

Differential Gear = 4.22 to 1 
Transmission Gear = 1.00 to 1 
Tire Diameter (Inches) = 22.76 
Tire Growth Factor = 0.000100 (Inches/(MPH*MPH)) 
Computation Results:
Vehicle      Computed     Tire     Xmisssion
 MPH           RPM     Growth(In)    Eff (%)
--------------------------------------------------
 30.0         1862       0.09        100.0
 35.0         2170       0.12        100.0
 40.0         2476       0.16        100.0
 45.0         2780       0.20        100.0
 50.0         3082       0.25        100.0
 55.0         3383       0.30        100.0
 60.0         3681       0.36        100.0
 65.0         3977       0.42        100.0
 70.0         4271       0.49        100.0
 75.0         4562       0.56        100.0
 80.0         4850       0.64        100.0
 85.0         5135       0.72        100.0
 90.0         5416       0.81        100.0
 95.0         5695       0.90        100.0
 
----- Original Message ----- 
From: "Dave G." <dmg at bossig.com>
To: "spridgets" <spridgets at autox.team.net>
Sent: Thursday, August 14, 2008 1:36 AM
Subject: [Spridgets] Speed vs RPM question...


>I don't know the source of my speedometer but the tach is working...
> I'm running the 4.2 rear end, ribcage box and 13" 175/80 tires on wire 
> wheels....
> What RPM should I see at 35, 55 and 70 mph.
> I'd like to avoid any concversatios with the boys in blue when I try a test run 
> on the towns' roads later this month..
> 
> Thanks...
> 
> --
> Dave G.   KK7SS
> '65 MK III Sprite in Richland, WA
> 
> The Original Point and Click  --- Smith and Wesson....
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