High Quality Chainsaw Bars Husqvarna Toys

Wireless and wired tach options? Help a new guy out :)

thedude74

Bonafide & Stuff !!!
Local time
10:13 PM
User ID
3254
Joined
May 23, 2017
Messages
735
Reaction score
2,625
Location
Alaska
Country flag
Did it work for you ?
I mean does your tach now measures the correct rpms ?
It does! 👍 True rpms. 😎 Also noticed when I get the tach lead near the plug/plug wire it registers RPMs without having to wrap the lead around it.
 

aeolian

Well-Known OPE Member
Local time
7:13 AM
User ID
23434
Joined
May 9, 2022
Messages
53
Reaction score
117
Location
Greece
Country flag
It does! 👍 True rpms. 😎 Also noticed when I get the tach lead near the plug/plug wire it registers RPMs without having to wrap the lead around it.
That is because between the tach's lead wire and the spark plug /spark plug cable ,a "capacitor" is formed.
But it's capacitance is low ( small conductive surfaces ) and proximity plays a crucial role then . A couple inches further away and the tach will not provide accurate measures anymore.Increasing conductive surfaces ( can not alter spark plug cable in that manner, thus the tach's lead wire is all left for altering ) will increase capacitance thus the tach will measure more accurately ,even a bit further away from the spark plug /spark plug cable.
The aforementioned aluminum tape wrapping "hack" ,is based at that principle ,essentially transforming the tach into a "wireless" one.
 
Last edited:
Top