as ive understood the stock tach wire is the black/white wire...now when i re-install my MSD can i cut that wire and just connect it to my MSD tach input and not have any problems?

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1989 Firebird. Modded.
700r4-->t5 w/ram clutch
Cold air, 1.6 rockers, 21lb injectors, 3" y-pipe, random tech cat, 3" ipipe, flowmaster 80 series 3" in 3" out hand made stainless tips, Lakewood LCA's, Msd 6a, Msd coil, Wonder Bar, 180* stat,
Coming Soon: T/a hood, Painted,Spohn Panhard Bar, 4thgen Front Seats, Cam!, Msd 8.5 wires, Posi (ACCEL IS CRAP)
"I'd rather run last in a full out race, than to NOT have run at all"
See my car Here!
In Memory of #3 Dale Earnhardt

 

Dont cut it...just run a jumper wire from the MSD tach port, to the plug in your original harness. That way if you need to remove the MSD from the circuit in a pinch, all you have to do is plug your original back into place....this goes for all the connections.

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Mike Metzler (Desert86Roc)[*] Check Out:SpeedWorldMotorplex.com[*] Check Out:Chevrolet F-Body Online Part & Illustration Manual[*] My 86 IROC 305 TPI Page (406 build in progress)

ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.362 @ 88.238 mph (uncorrected, headers, no NOS)
<><

[This message has been edited by Desert86Roc (edited August 28, 2001).]

 

Ok, thats a good idea.. Thanks!

------------------
1989 Firebird. Modded.
700r4--&gt;t5 w/ram clutch
Cold air, 1.6 rockers, 21lb injectors, 3" y-pipe, random tech cat, 3" ipipe, flowmaster 80 series 3" in 3" out hand made stainless tips, Lakewood LCA's, Msd 6a, Msd coil, Wonder Bar, 180* stat,
Coming Soon: T/a hood, Painted,Spohn Panhard Bar, 4thgen Front Seats, Cam!, Msd 8.5 wires, Posi (ACCEL IS CRAP)
"I'd rather run last in a full out race, than to NOT have run at all"
See my car Here!
In Memory of #3 Dale Earnhardt

 

Also, I just got done installing a MSD 6AL box on my car with the factory tach. I was having problems getting it to start after I wired everything up. Then after about 3 hours on the phone on JEGS tech support I found you don't even need to connect the tach output up for my car, 90 formula TPI HEI remote coil. I threw in a 3k chip it hit the rev limit fine.