Thread: Vortec Computer Vss Pulse Count

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Installed a 99 Vortec FI in ,my '51 Chevy pickup with a TH400, want to install VSS for the computer. I have an 8 pulse generator driving my Classic Speedometer, anyone know the pulse count for the vortec computer or a source for a VSS generator? Zeke

I believe the pulse range for the VSS is within the 400 to 600 range but that may be way off. I'll check and get back to this post.

Ya sorry I meant 40 pulse VSS I believe.

It's likely a 40 pulse VSS and you can get either a speedo from Autometer that accepts the new signal or if you want to keep the Classic look then there is a kit from Dakota Digital that allows you to splice in some wiring between the tranny and the chassis to change the signal recalibration to change it over. Also JTR has a kit to change the mechanical to the electrical signal and vice versa. Abbot also makes this same type of kit and vice versa but those will cost about 300 or so. Good luck!