MSD Programmable Timing Computer P/N 8981
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From: NJ
MSD Programmable Timing Computer P/N 8981
Any one ever use this? I got it off of my buddy for $50 brand new still in the box. I figured it would be nice to have with boost since it has high speed ignition retard. Instructions says it can only be used with a 6,7, and 8 series ignition. I have a SCI. Think it'll work still? 
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Joined: Feb 2004
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From: Pearl City, HI, USA
Re: MSD Programmable Timing Computer P/N 8981 (spoon.eg)
The SCI is a 6-series ignition. (Hence PN 6350) But, the SCI already has RPM-based retard built into it. The programmable timing computer gives you a little more control over the curve, but it is still flawed for FI applications for two reasons:
1) You need an ignition curve that is both RPM and boost dependant. For this you need a BTM.
2) Capacitive discharge really doesn't work well with FI, IME.
1) You need an ignition curve that is both RPM and boost dependant. For this you need a BTM.
2) Capacitive discharge really doesn't work well with FI, IME.
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