MSD 8680 Adjustable Timing Controller

WELL MADE COMPLETE KIT IN STALLED 1 HR

This timing controller work one time is all, now it will do absolutely nothing no power, add three different friends tried on three different cars same results, it's fried unfortunately 1 * for this

Works as described

Easy to install and works great

When this MSD Ignition 8680 Timing Controller worked, it worked well and I could adjust the timing from the driver's seat for different conditions. If I was in traffic I could advance the timing to get the engine to run a little cooler. If I needed higher idle speed when the engine was cold (no choke, race carb), I would just advance the timing. For optimum performance I could adjust the timing accordingly. It allows 15 degrees of adjustment. It is relatively easy to install and I am using it with an MSD billet ready-to-run distributor and a MSD Digital 6 Plus Ignition unit. Overall when everything was working, the engine (502 ci 600hp) ran great and started easily with no kickback (20 deg retard from Digital 6 Plus ignition unit). The engine even started great when hot. Overall a great unit with one major exception. It quit working just over a year after I bought. I doubt that it even has 500 miles on it. The unit is installed in the passenger compartment so it never gets hot or wet (car is not driven in the rain anyway). I really expected better from MSD as they are supposed to be the best. So that is a $150 down the drain and I hate to think that every year I'm going to have to buy a new one. If you are willing to risk the cost and downtime when it fails, then go for it. I need this system for this particular car and so I'm going to buy two so that I have a spare for when it fails again.I sent in the failed MSD controller and was pleasantly surprised when the repair cost was only $11.50! But with shipping both ways, the total came to about $35, still not a bad cost for repairing a $150 controller. Because of this very reasonable repair cost, I have changed my rating to 3 stars.

I bought this for a high compression big inch Hemi that I was having 'hot start' problems with.After installation of the 8680 Timing Controller from MDS, I was able to pull (10 degrees) timing out during start up and put the advance back in once the car was started.After installtion, and figuring out I needed to cut the white wire, I noticed an immediate difference in how the car started. In fact, it spun over with the ease of a modern day stocker, and fires right up after a few rotations. Simply spin the dial back to your "base" setting and you're ready to put the hammer down.The reason I bought this unit instead of the timing start/retard box, was that it allows me, in the event I'm not able to source race gas, to pull timing out of the engine to accomodate a tank or so of 93 octane, from the drivers seat - and the functional ranges exceed my requirements - but enables me to use it in the event I throw nitrous on the car later.This is a great product, and highly recommend it to anyone looking for a simple timing retard/advance device that offers the convenience of 'in cab' adjustments on-the-fly.David

I purchased this item almost a year ago ,worked for fist start up and then quit working . Sent out for repairs , got it back ,worked for one start up and quit working , sent back for repairs again .got it back and still don't work !!! , nothing short of a nightmare - avoid MSD at all costs , I have had nothing but problems with their stuff