What device to find REAL rpm?

[Fordiesel69]

During troubleshooting, what are you guys using to measure true RPM. We all know that 20 yr old guages can be quite a bit off.

 

[achris]

Re: What device to find REAL rpm?

If you're looking for supreme accuracy then you need to buy a really expensive shop tacho or, as I have done, go to an electronics shop and buy a tacho kit and build it up. It uses a white line painted on the pulley. I use it to check the accuracy of the dash tacho and then just use that....

Or just buy one of these... http://www.jaycar.com.au/ShowLargephoto.asp?id=8622&PRODNAME=Digital%20Tachometer&IMAGE=

Chris...........

 

[Howard Sterndrive]

Re: What device to find REAL rpm?

I have a Mac tools multimeter (branded Mac, but its an Extech). It came with a tach pickup.

you just clip it on any plug wire, set it for 2 stroke or 4 stroke and number of cyls

 

[jtmarten]

Re: What device to find REAL rpm?

For testing/adjusting purposes, I use my digital timing light.

 

[Bondo]

Re: What device to find REAL rpm?

Ayuh,... I'm borrowin' Bob's Snap-on digital timing light tomorrow...
I need to find me a Shop Tach, that can be read from the helm, as well as under the hatch....

 

[adeneo]

Re: What device to find REAL rpm?

Keep your eye on the timing mark and start counting!

 

[marlboro180]

Re: What device to find REAL rpm?

I use something like these Dell/Tach Meters . Pretty simple, works well, and mine is more than 20 years old. Craftman brand.

http://www.google.com/images?oe=UTF...esult_group&ct=title&resnum=4&ved=0CEYQsAQwAw

 

[Alpheus]

Re: What device to find REAL rpm?

I just bought on of these a couple of weeks ago and it works on anything.

EZ Tach Plus.

http://www.matcotools.com/Catalog/toolcatalog.jsp?cattype=T&cat=2481&page=6&#65714