Topic: Dwell-Tach Meter
in Forum: C3 Electrical
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Lifetime MemberDeBerry, TX - USA
Joined: 2/27/2002
Posts: 1006
Vette(s): 1971 383 Stroker- mille miglia red...5 speed
I have an old Sears dwell-tach meter that has two leads. One clip is red the other black. Anyone know where to hook this up to check rpm's?
I know the voices aren't real, but they have some pretty cool ideas... 
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Frederick, MD - USA
Joined: 9/8/2003
Posts: 3398
Vette(s): 1969 convertible L71 427/435 4-speed black interior
I believe one should go to the positive battery post and the other to the negative side of the coil. Actually, I'm a bit surprised that there's no negative wire for a ground, but it's been a long time since I've dealt with one of those.
Go to the Sears website. They have a service there you can get an owners manual for it. It may be nothing more than a photocopy of an original manual, but that's still good.
Go to the Sears website. They have a service there you can get an owners manual for it. It may be nothing more than a photocopy of an original manual, but that's still good.
Lifetime MemberHot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
they use to connect them to a pass through "spring" that went between one of your plugs and the wire.
on hei distributors.. you can connect it to the tach lead off the dist cap.
Lifetime MemberDeBerry, TX - USA
Joined: 2/27/2002
Posts: 1006
Vette(s): 1971 383 Stroker- mille miglia red...5 speed
All this has is two alligator clips. I tried red to neg. side of coil and black to ground. Didn't work. Maybe this thing doesn't work anymore. 
I know the voices aren't real, but they have some pretty cool ideas...
Lifetime MemberHot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
[QUOTE=cthulhu]they use to connect them to a pass through "spring" that went between one of your plugs and the wire.
[/QUOTE]
cthulhu 2007-01-05 11:02:44
on hei distributors.. you can connect it to the tach lead off the dist cap.
the one I have still has the spring
the alligator clip was put on the spring.
you put the spring between the dist cap and the plug wire.. then clipped the red alligator clip to it
Lifetime MemberLanoka Harbor, NJ - USA
Joined: 12/21/2006
Posts: 828
Vette(s): 1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c
the red goes to positive and the black goes to negative. there should
be another clip that goes to the negative side of distributoror to the negative side of coil on cars without hei ignition..
sometimes they have a green plastic shield with a clip inside or even a
female butt connector to slip on the cotact.
eddie20875 2007-01-05 17:07:58
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Lifetime MemberDeBerry, TX - USA
Joined: 2/27/2002
Posts: 1006
Vette(s): 1971 383 Stroker- mille miglia red...5 speed
Maybe there should be another clip, but there isn't, only two. This thing is about 20 years old, so who knows. I'll try what Ben said tomorrow. Hopefully it'll work.
I know the voices aren't real, but they have some pretty cool ideas...
in Forum: C3 Electrical
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