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03-18-2009, 10:42 AM
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#1 |
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Registered User
Join Date: Feb 2009
Location: mt. Pleasant, MI
Posts: 246
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hooking up tach where?
ok i found an old tach harness wire in to it and i get no tach signal it gets power and lights up so what wire goes to the tach signal o the dizzy? and where is the tach signal? i have a HEI non computer controled the wire colors are white,red,black, and green i think it's the green wire becuase it is the longest out of all of them. the tach is a sun pro 2"-3"
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1974 chevy Cheyenne C10 "The Mutt":4x4 convertion, NP208, 700-R4, stock 350, edelbrock Torker intake, edelbrock 600 CFM carb, duels  2001 Pontiac Grand Prix GT: 3.8L supercharged, 9.2:1 comprestion, ZZP XP cam, home made intake, 2 1/2" exhuast, 10psi of boost 
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03-18-2009, 11:47 AM
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#2 |
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Registered User
Join Date: Dec 2007
Location: apple valley , ca
Posts: 125
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Re: hooking up tach where?
it should be the green one, at least with autometer tachs thats the case... that green wire plugs into the tach terminal on the hei distributor. i hope this helps, tom
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03-18-2009, 11:55 AM
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#3 |
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Registered User
Join Date: Feb 2009
Location: mt. Pleasant, MI
Posts: 246
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Re: hooking up tach where?
it does. now i just need to find the terminal.
__________________
1974 chevy Cheyenne C10 "The Mutt":4x4 convertion, NP208, 700-R4, stock 350, edelbrock Torker intake, edelbrock 600 CFM carb, duels 2001 Pontiac Grand Prix GT: 3.8L supercharged, 9.2:1 comprestion, ZZP XP cam, home made intake, 2 1/2" exhuast, 10psi of boost
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03-18-2009, 12:03 PM
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#4 |
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Registered User
Join Date: Dec 2007
Location: apple valley , ca
Posts: 125
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Re: hooking up tach where?
if youre looking at the distributor cap you will see its obviously round. see where that square, thing that (should) be on the driver side of the cap.. thats where the module and power hook from the distributor to the cap.. if you clean off the top of that square part you will see where it says "tach".. thats where the green wire goes, use a female spade connector and youre dialed..
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03-18-2009, 12:17 PM
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#5 |
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Registered User
Join Date: Feb 2009
Location: mt. Pleasant, MI
Posts: 246
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Re: hooking up tach where?
so simple i feel stupid thanks
(man it's been a long time since i worked on an old GM)
__________________
1974 chevy Cheyenne C10 "The Mutt":4x4 convertion, NP208, 700-R4, stock 350, edelbrock Torker intake, edelbrock 600 CFM carb, duels 2001 Pontiac Grand Prix GT: 3.8L supercharged, 9.2:1 comprestion, ZZP XP cam, home made intake, 2 1/2" exhuast, 10psi of boost
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03-18-2009, 12:30 PM
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#6 |
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Registered User
Join Date: Dec 2007
Location: apple valley , ca
Posts: 125
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Re: hooking up tach where?
well i was just tryin to help you out... not tryin to make you feel stupid...
 glad i could help out.. anb by the way, stupid woulda been not asking and hooking the tach up wrong and burning it out... have a great day! |
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03-18-2009, 01:06 PM
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#7 |
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Registered User
Join Date: Feb 2009
Location: mt. Pleasant, MI
Posts: 246
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Re: hooking up tach where?
yup thanks it is hooked up and working fine got the idle set on the truck and the idle scwers idles at 650 rpm and no more smoke at idle (revving it up is another story)
__________________
1974 chevy Cheyenne C10 "The Mutt":4x4 convertion, NP208, 700-R4, stock 350, edelbrock Torker intake, edelbrock 600 CFM carb, duels 2001 Pontiac Grand Prix GT: 3.8L supercharged, 9.2:1 comprestion, ZZP XP cam, home made intake, 2 1/2" exhuast, 10psi of boost
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03-18-2009, 07:07 PM
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#8 |
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Registered User
Join Date: Nov 2008
Location: Lusby, MD
Posts: 563
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Re: hooking up tach where?
dude your idle is too low you need to set it at 900 and your timing should be at 12 degrees advanced just thought i say something. cause i just re built my motor and the tag on the radiator support said it all to me i have a manual trans and my timing is to be 8 degrees advanced and idle at 900 and mine runs sweet.
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http://67-72chevytrucks.com/vboard/group.php?groupid=37 73 C10 Fleetside If it ain't a Chevy it's foreign  http://hotridesmag.com/ |
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03-18-2009, 08:02 PM
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#9 |
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Registered User
Join Date: Feb 2009
Location: mt. Pleasant, MI
Posts: 246
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Re: hooking up tach where?
i just guessed i have no stickers
 woun't take mutch to bump it up
__________________
1974 chevy Cheyenne C10 "The Mutt":4x4 convertion, NP208, 700-R4, stock 350, edelbrock Torker intake, edelbrock 600 CFM carb, duels 2001 Pontiac Grand Prix GT: 3.8L supercharged, 9.2:1 comprestion, ZZP XP cam, home made intake, 2 1/2" exhuast, 10psi of boost
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03-18-2009, 08:06 PM
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#10 |
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Registered User
Join Date: Nov 2008
Location: Lusby, MD
Posts: 563
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Re: hooking up tach where?
i should take a picture of it but are older motors should be set like they say.
__________________
http://67-72chevytrucks.com/vboard/group.php?groupid=37 73 C10 Fleetside If it ain't a Chevy it's foreign http://hotridesmag.com/ |
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