Author Topic: Chainsaw Tachometer choices  (Read 22257 times)

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Offline Cut4fun

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Chainsaw Tachometer choices
« on: June 02, 2011, 03:24:21 pm »
Get a .5 refresh rate tach. The 1.5 sec refresh rate from Baileys and EDT 7-8 are to slow for the money. There is a cheapie tach that is 2.5 sc refresh rate and cost $20-$25, it works, accurate but is slow.

Older no longer available tachs like the Stihl EDT-5, DET-302, DET-303, Echo-1000 or 1100 (same as EDT-5).  If you find one grab it.

Still available TT-20 and Tiny Tach are all .5 refresh rate and cost $85

If I couldnt find a EDT-5 like I have, I would buy one of these new. Amick's link below.

http://www.amickssuperstore.com/DTI_2_Cycle_Two_Stroke_Tachometer_Tach_p/dti%20tech-tach%20tt-20k%20tach.htm
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Offline Cut4fun

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Re: Chainsaw Tachometer choices
« Reply #1 on: June 02, 2011, 03:27:15 pm »
Per a trusted stihl man Lakeside.

 EDT-7 and 8 tachs will work with all previous Stihl ignitions, as well as the new IEM MS 280, and all future models that have dual magnets in the flywheel. All previous tachs including the EDT-5 will not work on IEM units.

The EDT-7 has a mode button that will allow selecting different engine ignition systems, but this feature is not required on Stihl products. Might be useful on your generator or other engines though...

The EDT-8 has no mode features, and will work with all STIHL products.

These tach do not refresh the display as fast as the EDT-5
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Offline John Mc

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Re: Chainsaw Tachometer choices
« Reply #2 on: June 11, 2011, 08:17:59 am »
I have the DTI TECH-TACH TT-20K, bought from Amick's (same link as Kevin provided in the first post on this topic). In fact, it may have been Kevin that suggested it in a link posted on another site.

It works well. I'm glad I got something with the quick refresh rate (0.5 sec). The recall of max RPM is also a useful feature.

One thing to look for for someone new to this: there are a lot of cheaper tachs out there that can't measure the high RPMs of a chainsaw. They may work fine on a lawnmower or generator (typically 3600 RPM max), but won't give a good reading for a chainsaw (max RPMs typically in the 12,000 - 15,000 RPM range, or higher if it's a "hot" saw).

I'm still trying to learn to tune by ear. I've been told this is a more reliable way to get a good, safe mixture setting than relying on a tach alone. I'm still no good at it. The Madsen's links on tuning help, with their audio files, but I really need to hear it live a few times from someone who can point out what's going on. For now, I try by ear, then verify with the tach.

A question for you tuning gurus: how does tuning a saw change if you have an RPM-limited ignition coil, when tuning by ear or by tach?

John Mc

Offline ms460woodchuck

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Re: Chainsaw Tachometer choices
« Reply #3 on: May 26, 2012, 02:49:56 pm »
 Thanks for bumping this thread Kevin. I'm still not sure which tach I'll go after. Right now I have the sendec from bailey's and really don't care for it.

 As for my user name I'll keep it for now. I really like the 460 and will get me another one in the future. (Although I'm really a POULAN GUY)

Offline Cut4fun .

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Re: Chainsaw Tachometer choices
« Reply #4 on: May 26, 2012, 05:07:08 pm »
  Right now I have the sendec from bailey's and really don't care for it. 

That one has a 1.5 second refresh rate. To slow. For same money get a .5 second refresh rate. JMO
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Offline Cut4fun

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Re: Chainsaw Tachometer choices
« Reply #5 on: May 26, 2012, 05:31:21 pm »
I think this is the company that used to make the EDT-5 for Stihl and the Echo 1000. I havent a clue what one would cost or where to get one. looks updated with all the front buttons in pic.

Links have went bad, need to search for them now.

PET 1000   http://www.npelectronicsindia.com/pet-1000-tachometer.htm

This is one of the older made for stihl ones too, was  DET 302 .  PET 302  http://www.npelectronicsindia.com/digital-engine-tachometer.htm
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Offline farmboy

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Re: Chainsaw Tachometer choices
« Reply #6 on: June 01, 2012, 09:28:21 am »
I have a TT-20K, EDT5, PET1000, Echo 1000 and a couple more don't remember what they are.  I use the EDT5 most of the time as its the closest one in the box.  The TT-20K is the best value.  I use it to check the EDT when I'm not sure the EDT is working right.  EDT goes stupid occasionally don't know why.  If I were in the market for a new tach it would be the TT-20K.  Real happy with mine.  I've found when checking limited coils they go crazy when you get right at or over the limit of the coil.  I start rich on the H screw and slowly lean until I reach max rpms or tach goes crazy.
Shep

Offline Al Smith

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Re: Chainsaw Tachometer choices
« Reply #7 on: June 01, 2012, 10:19:32 pm »
I don't own a high speed tachometer although it would be nice to have .Old school ,just set them by ear .

The  times I've checked a few I was pleasantly surprised they were running several thousand RPMs above factory max .Once you  change the porting scheme the factory suggested max speed no longer applies .

You know you run them a bit and "read" the plug .If it's that nice light brown color you're pretty well on the money the way I see it .

Offline Cut4fun .

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Re: Chainsaw Tachometer choices
« Reply #8 on: July 15, 2012, 08:19:24 am »
See they are selling the    OPPAMA PET-1100 Tachometer  maker of the older stihl EDT-5  http://www.amickssuperstore.com/OPPAMA_PET_1100_Tachometer_p/oppama%20pet-1100%20tach.htm
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Offline MindFork

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Re: Chainsaw Tachometer choices
« Reply #9 on: October 07, 2013, 01:46:21 pm »
What about the DTI Fast Tach?

 

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