Re: [AMC-list] engine rpm versus mph

[Ken Ames <ameskg@xxxxxxxxx>]

Hook up a dwell/tach meter and compare the two. 

Ken


Quoting "(Sandwich Maker)" <adh@xxxxxxxxxxxxxxxxx>:

> " From: "Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>
> " 
> " []
> " 
> " 
> " 2,87 axle ratio = 1630 rpm
> " 
> " []
> " 
> " the curious thing about this information is the tach (factory in dash) for
> 
> " the white 70 Javelin reads about 2100 rpm at 70 mph using the 2.87 axle and
> 
> " T5 in 5th gear.
> " 
> "  Apparently there are issues with the tachometer. That becomes very real 
> " when noticing the tach with bounce up 300 to 500 rpm without using 
> " additional throttle.
> " 
> " I'm using a MSD Pro Billet ready to run distributor that needs no
> translator 
> " box for the tach.
> 
> possible it's not really suitable for -this- tach?
> 
> " Makes me think the electrics for the tach are a bit unstable or the system
> 
> " ground is intermittently or always a bit resistive.
> " 
> " Got any ideas?
> 
> first thought - after all this time, the tach needs recalibration.
> components age and drift, contacts get dirty...  if it has
> electrolytic capacitors, they don't age at all gracefully and probably
> need replacing.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
> internet rambler                            is to see what all have seen
> adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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