Toyota tach help
Thread Starter
Teching In
Joined: Oct 2005
Posts: 29
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From: Naples, FL
Toyota tach help I have searched, but did not find info on what needs to be done to get a stock 82 Supra 6cyl tach to read from the LS1 tach signal. I have used EFILive to reset the tach signal to give 3 pulses per revolution and tried with and without the 12v pullup signal enabled. The tach does nothing.
Anybody know what the Toyota tach needs? It was originally driven by a signal which from what I can determine is a 12v pulsed signal from the ignitor.
Thanks for any help.
Keith
Anybody know what the Toyota tach needs? It was originally driven by a signal which from what I can determine is a 12v pulsed signal from the ignitor.
Thanks for any help.
Keith
Take a look at this and see if it provides any insight:
http://www.mindspring.com/~jayk3/toyota/tachmod.htm
http://www.mindspring.com/~jayk3/toyota/tachmod.htm
Thread Starter
Teching In
Joined: Oct 2005
Posts: 29
Likes: 0
From: Naples, FL
Thanks. I have seen that. It deals with making a 4cyl tach work with a 6 or 8 cyl signal. My problem seems to be that my tach does not respond to the square wave signal that the LSx computer puts out. I think I need some way to convert it to a pulsed signal.
Keith
Keith
Thread Starter
Teching In
Joined: Oct 2005
Posts: 29
Likes: 0
From: Naples, FL
Ok, I got it figured out. Used an MSD-8920 tach adapter that is designed to convert the 12v square wave output of an MSD box to a pulse signal that a voltage triggered tach can understand. Hooked it up between the LS1 PCM tach output and the Toyota tach and now the tach works.
Keith
Keith
