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Old 02-04-2009, 09:16 PM
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Looking for feedback on MSD 8680 dash timing control

I'm considering an MSD 8680 in-car timing controller, anyone got any experience with one of these? They sound like just the ticket for tuning the timing for various conditions.

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Old 02-05-2009, 07:51 AM
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I bought one myself for my current project. I'd like to here the responses also. Engine is not done yet - nor is the rest of the car. I won't know how it works until July.
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Old 02-05-2009, 05:19 PM
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A friend is using one now on his 383 powered 67 Elky. Dial is set in middle of the range and distributor set for total 38* timing, dial it back 6* on a 150 shot of nitrous, dial it up 8* when at highway cruise to mimic a vacuum advance mechanism. Works fine, DON'T forget to turn it back down after leaving the highway, the too high idle is a good tip-off. I myself would prefer something automatic and programmable. He wanted something simple.
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Old 02-05-2009, 05:32 PM
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I've had one on my car for a couple of years. They're very accurate! I've Advanced and retarded the box and double checked the actual timing and it's right on.

Great for test and tune when trying new setting's in small increments. I also set mine in the middle so I have some both way's.

Very happy with it!
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Old 02-05-2009, 08:23 PM
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I agree with the others before me. I have one on my 64 Pontiac and it works well...I can run my 9.3 462 on 89 and keep the initial right on the edge for good performance...MSD units seem to be good quality..

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Old 02-06-2009, 06:30 AM
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Great feedback. I'm really installing mine just for insurance. I'm building at 10.8 compression and with a healthy cam and stroke along with a bottom filled block. Figured that if I were on the street on a hot day running in 5th gear I could dial back the timing a bit if necessary to avoid pinging, or if I happened to run into a situation where only regular gas were available for a short time.
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Old 12-12-2011, 01:01 PM
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MSD 8680 Timing Control

I installed an MSD timing control in my blown, 454 T-bucket. I've had all sorts of problems with it, but I think I may have found the problem. Can I assume that the distributor must be locked out for the timing control to work properly?

My MSD distributor is NOT locked out. It's a stock HEI. I installed the 8680 timing control and set up the total timing. Then I shut down the engine and restarted it. All of a sudden my timing is retarded. It becomes more retarted every time I shut down and restart the engine.

Can someone please tell me if the distributor MUST BE LOCKED OUT for the timing control to work properly?

Thanks!
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