MSD 8625 Timing Twister

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Feb 16, 2014 | 09:13 PM

02_camaroz28

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MSD 8625 Timing Twister

I purchased a MSD timing twister used and the instructions I have aren't really clear on where to hook everything up. I thought someone who has this box could fill me in on where they hooked theirs up. I understand the connectors are plug and play. Im going to hook up the switched power to the fuse box and ground it near there. Just need to know where to connect the blue and gray wires at. Thanks in advance

Feb 16, 2014 | 10:18 PM

brandon6.0

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From: Glennville, GA.

One is a tach output and the others a timing retard. Used for nitrous. U can download install wiring from msd.

Feb 17, 2014 | 06:35 AM

02_camaroz28

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the wiring diagram i found isnt very clear on where to get a tach signal and where to hook up for the retard so it is switched on when the nitrous is armed.

Feb 18, 2014 | 11:29 AM

NitrousExpress

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From: Wichita falls Texas

The gray wire would be used if you wanted to hook up a Tach if you did not already have one.

The blue wire will go to the output side of your activation switch, so that it receives 12 volt power when the nitrous is being used so that it can pull the timing.

Trey

Apr 5, 2014 | 09:06 AM

wavebyby

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From: long island , ny

did you ever hook you msd up i just bought a used one also and would like to know how to install it and work with my nitrous kit ..

Apr 6, 2014 | 06:35 PM

02_camaroz28

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Quote:

Originally Posted by wavebyby

did you ever hook you msd up i just bought a used one also and would like to know how to install it and work with my nitrous kit ..

Yes I got it hooked up. There is a plug and play harness that goes to the cam sensor and the crank sensor. There will be another short plug coming out of the left side of the box. Its a MAP sensor hook up for boosted cars. Then there are three wires that must be hooked up.

Black Wire-Ground
Blue Wire-Goes to the the on side of your nitrous switch so that when you turn on the nitrous it pulls the timing.
Red Wire- Needs to be hooked to a switched 12 volt. This gave me problems at first because i had it hooked to switched 12v from fuse box but it wasnt a constant 12v. Which means when cranking it cuts power going to the msd box and wont allow the car to start. It will just crank over. I found that the BATT port on the fuse block on the drivers side of the dash has 12v while cranking so i used a flat connector and plugged it in there.
Gray Wire I didnt hook this up. I think its just a tach output wire. Used for aftermarket tach or boost retard.

Here are the instructions from MSD: http://www.msdignition.com/instructi...df?terms=86252