08-29-2015, 06:43 PM | #1 |
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Join Date: May 2010
Location: Kenosha, WI
Posts: 210
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Tachometer App
I found a $.99 cent app for a tachometer that works pretty good. It is called "Remote Tach". It has a speedometer also. You put in the tire diameter, rear end ratio and the final drive. The final drive would be one without overdrive. 26 percent overdrive would be .74. It works off the car's speed and is not accurate in first and second gear. It is very handy to check what rpm the engine is turning at different highway speeds. I am going to buy a suction cup phone holder for the windshield. I have checked it against other vehicles with a tachometer and it is right on.
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08-29-2015, 09:43 PM | #2 |
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Join Date: Jun 2010
Location: Polk City, Iowa
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Re: Tachometer App
I bought it and it works fine. Gives elevation, gps coordinates, speed, mph, rpm, & compass. Fill in the setting page. My wheel diameter is 28.8 inches. Put 1 in the axle field and your rear end ratio in trans field. Mine is 3.78. If I want rpm iwith my 26% OD I put 3.0 in trans field.
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Steve Hanna, Polk City, IA |
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08-30-2015, 04:27 AM | #3 |
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Re: Tachometer App
I would measure from the road to the center of the hubcap, then double that for the "true rolling diameter". It'll be a little more accurate to find the true RPM.
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08-30-2015, 07:28 AM | #4 |
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Location: Polk City, Iowa
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Re: Tachometer App
Tom, you are correct. That is important for accuracy. I just did not want to use my fat finger on my iPhone to type all that. I would also have my tires inflated properly.
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Steve Hanna, Polk City, IA |
08-30-2015, 07:52 AM | #5 |
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Re: Tachometer App
Where do you get it?
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08-30-2015, 08:31 AM | #6 |
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Location: Polk City, Iowa
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Re: Tachometer App
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Steve Hanna, Polk City, IA |
08-30-2015, 08:52 AM | #7 |
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Join Date: Nov 2012
Location: Clinton, WI.
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Re: Tachometer App
can't seem to find that app for a droid?
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08-30-2015, 02:56 PM | #8 |
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Join Date: Apr 2013
Location: Middlesex County, NJ
Posts: 298
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Re: Tachometer App
As noted in a related post...
In Ryan's "'I've had enough" post, many responders balked at the notion of using real names on this forum, citing privacy concerns. Users should be aware that most apps - especially the free ones - are mining your device for data, sending info back to the developer and who knows who else. The flashlight apps are notorious for this. Not saying this app does or doesn't, just be aware. |
08-30-2015, 02:59 PM | #9 |
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Join Date: Apr 2015
Location: Boise, Idaho
Posts: 1,578
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Re: Tachometer App
I found an online calculator
http://www.crawlpedia.com/rpm_gear_calculator.htm With my 4:11 rear end and 29.25 tire size and 40 mph I get about 1890 rpm....that seems excessive! At 50 it gives me 2361 rpm....but this is using the speedo...I need to try it using a GPS... And as a bonus when measuring the wheels as Tom suggested, from the floor to the hub cap center, I learned that I have a complete matching set of five "Bool" hub caps..
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Early '29 CCPU that had a 4-speed, but not any more.......in the family since '62 |
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