Re: Highway speeds/engine rpm/ gearing and other stuff
Posted by Gary On 2013/3/30 23:32:49
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I don't know Howard, remember when I thought mine was racing at 55 and 60 and didn't think it was going in high gear at all?
come to find out I was basing it on the sound of my more modern cars...even my '04 Focus commuter sounds like its loafing at 70 compared to my Clipper...that's the difference in an automatic overdrive and a single speed direct drive tranny. After driving it and getting used to it, the Clipper sounds comfortable running 2250 RPM's at 55. Based on the estimated 250 RPM increase for every 5 MPH, 3000 RPM's at 70 is about the max for me but prefer 65 for a sustained cruising speed. I haven't checked it but of course my speedo could be off by as much as 5 MPH as well.
HH56 wrote:
Quote:
Phil53 wrote:
The speedo on my 53 Pat w/Ultramatic is at least 5 mph faster than actual speed by my estimation. Assuming that it was correct what would be a safe max speed/engine rpm for this car. The engine always seems to be racing with the indicated speed at 60 to 65.
Is your Ultra going into direct drive solidly? I don't recall the engine in my 54 being terribly loud or racing at that speed.
I don't know Howard, remember when I thought mine was racing at 55 and 60 and didn't think it was going in high gear at all?
come to find out I was basing it on the sound of my more modern cars...even my '04 Focus commuter sounds like its loafing at 70 compared to my Clipper...that's the difference in an automatic overdrive and a single speed direct drive tranny. After driving it and getting used to it, the Clipper sounds comfortable running 2250 RPM's at 55. Based on the estimated 250 RPM increase for every 5 MPH, 3000 RPM's at 70 is about the max for me but prefer 65 for a sustained cruising speed. I haven't checked it but of course my speedo could be off by as much as 5 MPH as well.This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=120231