My damper keeps moving around on the crank and causing it to vibrate. I set it in the right place no vibration , get on it and couple of times then it starts the vibration and I find the damper has moved . Do you think installing a set screw would be a good fix? It's a 95 .

 

http://www.thunderracing.com/catalog...ories&pcid=239

 

That keyed hub will work and I don't think I would try and have your existing hub 'keyed'. Since it's already spun on the shaft it's basically polished the bore to a slight oversize. Using a key on a slightly oversized bore will put all the strain on the key itself. That's fine if the part was designed for it but this hub wasn't and I've heard of people finding cracks at the keyway. Of course that may not be a problem if you only drive the altenator, PS pump and the AC....

 

Thanks for the link , I just ordered one.

 

Will that work with a stock balancer?

 

Yes, the stock balancer will bolt right up....

 

Just FYI: I would suggest taking it easy on the car until you get that keyed hub on. When I pulled my original motor a few years back, the hub had welded itself to the crank, and the crank was subsequently trash. The machine shop had to cut the crank to get the timing cover off. Luckily I was replacing it, but it would suck if it welded on to yours unbalanced and turned into a rebuild project.

 

I'd like to point out that the damper is not a balancer....you can put it on in any position and it doesn't, or shouldn't, affect the balance of the engine. It's job is to absorb torsional harmonics before they can beat your crankshaft to pieces. Torsional forces are a twisting force applied around the centerline of the mains and, in the case of the crank, fed tangential forces at irregular intervals. The damper absorbs these forces by feeding them to a heavy ring isolated by a rubber connector....or maybe it's magic...LOL

 

I have heard that many times and I agree it is a damper but come go for a ride . I will prove it to you. and in the repair manuals its tells you to line it up or it could vibrate.

 

I keyed my own hub when I built this engine. Damn undersized Eagle crank snout!

25,000+ miles on it and not a problem one.