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The Tach and the HEI (aftermarket) are not happy together. Tach shoe 6,500 at Idle. I just ordered a full HEI from Ecklers, cap, rotor, coil. Will this make the tach happy?
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Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Most likely a problem with the tach filter. It was probably dis-connected when the aftermarket HEI was installed. Check to see if there is a spare/unused connector coming off of the "Tach" plug/terminal on the distributor cap. This wire will go down a few inches, and the tach filter will be in-line with that wire. If there is nothing plugged into the "Tach" terminal on the distributor cap, that means the tach isn't even plugged in. 
Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Tack is Plugged in, did not Notice that wire you are talking about. Hope PO did not cut it. Car is at my hobby shop in S.C.
Thank you for the reply.
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in Forum: C3 Engines, Driveline and Handling
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