can i use my tach now? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ocbaud · 03-11-2004, 09:08 PM

how do i hook up my sunpro supertach II to my 6AL box???

the tach has 4 wires. in the 6al instructions it says that for sun tachs i would need a tach adapter(#8920)

is there anyway to hook it up without this?

NeCrOmAnCeR · 03-11-2004, 10:19 PM

Some after-market tachometers are not as sensitive as others and may require the tach adapter. When the MSD box is triggered via the magnetic pick up wires (like with your pro-billit dizzy) the tach signal may be to weak to trigger the tach. No damae will occur to your tach from hooking it up to the tach output on the MSD box. If the tach operates ok, you won't need the adapter. I have a pro-billit dizzy and 6AL box on my wifes '67 Mustang and my sun tach works great. Connect it as the tach instructions say except the tach lead obviously goes to the box.
When are you gaing to start that thing anyways?

ocbaud · 03-11-2004, 10:27 PM

carb, headers, electric fans, and alternator are all i lack.

i need to know if the tach will work before i start it up so i can break it in.

NeCrOmAnCeR · 03-11-2004, 11:08 PM

Again, that setup works fine on my wifes mustang.

If you are really concerned about it you could remove your dizzy (Make sure you mark the direction the rotor is pointing, take a screwdriver and put it in the coil wire and lay it on the intake to give a ground path for the spark, leave the magnetic trigger wire connected to the tach and then turn on the ignition. Have someone watch the tach as you use a drill or something to turn the dizzy. You will have to turn it quite rapidly. STAY AWAY from the screwdriver so you don't get shocked. Your tach should respond to the dizzy spinning. Then turn of the ignition, and replace everything. This is not all that hard, I always pre-oil an engine before firing it for the first time so the dizzy is already out.

Feel free to ask more questions if this process is not clear.

RockHQ · 03-12-2004, 04:54 PM

So whats wrong with using a timing light with a tach built in for breaking in the engine?

ocbaud · 03-12-2004, 05:01 PM

Quote:

Originally posted by RockHQ
So whats wrong with using a timing light with a tach built in for breaking in the engine?

its something else i have to buy

ocbaud · 03-13-2004, 07:15 PM

okay, on my tach it has 4 connections i need to make. the "I" that runs to the msd box, the "L" for the light sourse(hooked it up through the fuse box), the "G" for a ground, and an "-" for ????

**swervin ervin** · 03-13-2004, 09:02 PM

http://www.tradervar.com/All%20Other%20Sun%20Tachs.pdf

**swervin ervin** · 03-13-2004, 09:05 PM

According to the above link you should have a red, white, black and green wires. If so it would be black\ground, red\ignition, white\dash lamps and green\MSD tach terminal.

ocbaud · 03-13-2004, 10:13 PM

Quote:

Originally posted by swervin ervin
According to the above link you should have a red, white, black and green wires. If so it would be black\ground, red\ignition, white\dash lamps and green\MSD tach terminal.

whats the ignition one go to?(red)

**swervin ervin** · 03-13-2004, 10:23 PM

It should go to any source that has power when key is on. The fuse panel should have a ign space. You could also hook it into one of the pink w\ black stripe ignition wires going to the gauges.

ocbaud · 03-14-2004, 01:16 AM

Quote:

Originally posted by swervin ervin
one of the pink w\ black stripe ignition wires going to the gauges.

exactly what do those wires run to when they get past the firewall?

**swervin ervin** · 03-14-2004, 01:19 AM

They come from the fuse panel up to the gauges.

ocbaud · 03-14-2004, 01:29 AM

Quote:

Originally posted by swervin ervin
They come from the fuse panel up to the gauges.

okay. i also saw a pink wire w/black stripe coming out of the firewall. i cut it already. the 12v switched on my msd box is hooked up to the original + pink wire that was ran to my old distibutor

ocbaud · 03-14-2004, 02:17 AM

Quote:

Originally posted by swervin ervin
MSD's instructions say to run the heavy red and black straight to the battery. This is where mine is. Read your instructions again.

yeah, my heavy red and black run right to the battery too.

the small red wire is supposed to be ran to a switched 12v source. i have mine hooked up to the original pink + wire that was ran to the old tach.

**swervin ervin** · 03-14-2004, 02:20 AM

Sorry, I misread your first post and deleted what i said. You are too dang fast. Of course typing with one hand sucks too.

ocbaud · 03-14-2004, 02:21 AM

Quote:

Originally posted by swervin ervin
Sorry, I misread your first post and deleted what i said. You are too dang fast. Of course typing with one hand sucks too.

what do you mean? i type with my toes

03-11-2004, 09:08 PM	#1
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	can i use my tach now? how do i hook up my sunpro supertach II to my 6AL box??? the tach has 4 wires. in the 6al instructions it says that for sun tachs i would need a tach adapter(#8920) is there anyway to hook it up without this?

03-12-2004, 04:54 PM	#5
RockHQ ROCKET POWER! Join Date: Feb 2003 Location: Finland, Europe Posts: 509	So whats wrong with using a timing light with a tach built in for breaking in the engine? __________________ What did i do last nite? I had a wonderful time, That's what they tell me What did i do last nite? 1979 C-10 shortfleet: Olds 350, Th400, 12 bolt Current project: 1969 Olds 455 W-30, needing a rebuild

03-13-2004, 09:05 PM	#9
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	According to the above link you should have a red, white, black and green wires. If so it would be black\ground, red\ignition, white\dash lamps and green\MSD tach terminal. __________________ Mike 1985 Chevy C-10

03-11-2004, 10:19 PM	#2
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	Some after-market tachometers are not as sensitive as others and may require the tach adapter. When the MSD box is triggered via the magnetic pick up wires (like with your pro-billit dizzy) the tach signal may be to weak to trigger the tach. No damae will occur to your tach from hooking it up to the tach output on the MSD box. If the tach operates ok, you won't need the adapter. I have a pro-billit dizzy and 6AL box on my wifes '67 Mustang and my sun tach works great. Connect it as the tach instructions say except the tach lead obviously goes to the box. When are you gaing to start that thing anyways?

03-11-2004, 10:27 PM	#3
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	carb, headers, electric fans, and alternator are all i lack. i need to know if the tach will work before i start it up so i can break it in.

03-11-2004, 11:08 PM	#4
NeCrOmAnCeR Registered User Join Date: Feb 2004 Location: Hodgenville, Ky Posts: 735	Again, that setup works fine on my wifes mustang. If you are really concerned about it you could remove your dizzy (Make sure you mark the direction the rotor is pointing, take a screwdriver and put it in the coil wire and lay it on the intake to give a ground path for the spark, leave the magnetic trigger wire connected to the tach and then turn on the ignition. Have someone watch the tach as you use a drill or something to turn the dizzy. You will have to turn it quite rapidly. STAY AWAY from the screwdriver so you don't get shocked. Your tach should respond to the dizzy spinning. Then turn of the ignition, and replace everything. This is not all that hard, I always pre-oil an engine before firing it for the first time so the dizzy is already out. Feel free to ask more questions if this process is not clear.

03-13-2004, 07:15 PM	#7
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	okay, on my tach it has 4 connections i need to make. the "I" that runs to the msd box, the "L" for the light sourse(hooked it up through the fuse box), the "G" for a ground, and an "-" for ????

03-13-2004, 09:02 PM	#8
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	http://www.tradervar.com/All%20Other%20Sun%20Tachs.pdf __________________ Mike 1985 Chevy C-10

03-13-2004, 10:23 PM	#11
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	It should go to any source that has power when key is on. The fuse panel should have a ign space. You could also hook it into one of the pink w\ black stripe ignition wires going to the gauges.

03-14-2004, 01:19 AM	#13
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	They come from the fuse panel up to the gauges.

03-14-2004, 02:20 AM	#16
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Sorry, I misread your first post and deleted what i said. You are too dang fast. Of course typing with one hand sucks too.



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