i've got the older style mallory ignition amplifier and have already downloaded a wiring diagram to hook up to a unilite. now my question is where does the stock tach lead hook up to.does it go to the coil or to the coil hook-up on the ignition box.

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1972 chevy camaro ss 350 sbc 425 hp/356 @ the wheels,350 trans,373 gears,daily driver with restification in progress for the old school / day 2 look
future plans- turning it into a baldwin motion Z30 clone

"IF IT'S TO LOUD YOUR TO OLD"
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http://www.centuryperformance.com/mallory/mallorytech.asp

You can't go wrong here.....

wayne it doesn't show anything for a tach hookup

There should be a tach signal terminal on the box. Hooking the tach to the coil is a no-no with most all of the aftermarket boxes. You'll toast the tach, then the box.

<font face="Arial,Verdana" size="2">Originally posted by Marv Davis:
There should be a tach signal terminal on the box. Hooking the tach to the coil is a no-no with most all of the aftermarket boxes. You'll toast the tach, then the box.</font>

only terminals on the box are trigger,ground,positive coil and negative coil

i have the 4a box and the tach signal hooks up to the green wire.

okay here is a wiring diagram that shows a unilite distributor wired to my hyfire box but doesn't show the tach hook up

http://www.centuryperformance.com/images/mallory/m_29026i.gif

I can't find a thing on this box. I really think you ought to call/e-mail Sam Solace at Century and get his input. He's been dealing with Mallory for a long time and is probably more experienced than the new phone jockeys at Mallory/MrGasket.

<font face="Arial,Verdana" size="2">Originally posted by ccrider:
i have the 4a box and the tach signal hooks up to the green wire.</font>

so that green wire is that the signal wire your talking about. okay then the tach wire would hook up to the signal wire post on the hyfire box.

<font face="Arial,Verdana" size="2">Originally posted by Marv Davis:
I can't find a thing on this box. I really think you ought to call/e-mail Sam Solace at Century and get his input. He's been dealing with Mallory for a long time and is probably more experienced than the new phone jockeys at Mallory/MrGasket.</font>

hey marv, sam solace emailed me and said the tach hookup is to the negative side of the coil

I would trust Sam,, if he says negative side of the coil, then it's negative side of the coil. Where did you get this box. Is it a dinasour, something new,,, ???? I can't find a thing on it.

Remember the unilite is somewhat touchy about voltage and spikes. Make sure that resistor STAYS in the loop.