[ponchjoe]

I agree with mgarblik but this is not a smooth running engine at idle. Does it go away with rpms? I had the VOODOO 704 HFT in my 462 and it idled nice at 850-900 but not at 650-800 range.
I would pull each plug wire and see if it smooths out. If it does, change your ignition set up. BTW, the distributor does have 12 v all the time right, not just crank?

[mgarblik]

I just had this crazy idea pop in my head. I keep trying to think, "what's different from the dyno than the installation in your car". I don't know what type of dyno your engine was run on, but my dyno, a Superflow SF-901 REQUIRES a manual transmission flywheel and a drive plate to couple the engine to the dyno. Your car is an auto trans unit. You need to make absolutely sure you are using the correct flex plate to crankshaft bolts for your application. These would be bolts that have a super narrow shoulder under the head, threads almost all the way up. They should protrude through the flex plate into the crankshaft and stop just shy of flush on the inside of the crankshaft flange. There may be a shim used on the assembly or not depending on year. Torque is 95 Ft. Lbs. Make absolutely sure all this is correct or it absolutely will make a knocking noise much like what I am hearing. Again, I can't help feeling something is different from the dyno to your installation that is causing this. Good luck.

[TedRamAirII]

Just thought of something. Pull the distributor, and watch the cam gear as someone is cranking the engine over. it could be out of round, and the noise you hear is the oil pump shaft hitting the hole in the block. For sure check the lower distributor bushing , see if its tight or loose again. I know Paul checks the cam for being straight, but I doubt he would check concentricity of the gear. Maybe the gear isnt cut right, like one of the grooves not deep enough. Really look the dist gear over and see if its worn abnormally.

[gtofreek]

Originally Posted by TedRamAirII

Just thought of something. Pull the distributor, and watch the cam gear as someone is cranking the engine over. it could be out of round, and the noise you hear is the oil pump shaft hitting the hole in the block. For sure check the lower distributor bushing , see if its tight or loose again. I know Paul checks the cam for being straight, but I doubt he would check concentricity of the gear. Maybe the gear isnt cut right, like one of the grooves not deep enough. Really look the dist gear over and see if its worn abnormally.

Good thought, but I do check this also when I check the cam for bent. This cam only had .001" runout. Most cams I see have .002"-.003" runout and they have never been a problem.

[Formulajones]

Originally Posted by HWYSTR455

So the distributor gear was replaced when the shaft/bushing issue was discovered?

Then maybe it is the gear on the cam, but wow, I have never seen that, though guess it is a possibility, and that could possibly explain why this has been overlooked.

I say swap the dizzy and while it's out, turn the engine over and look down the hole, see if there is a noticeable wobble to the cam gear. It's a stretch, but guess it's still something that should be checked/eliminated.



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^^^^^^^^^^^^^

Originally Posted by gtofreek

Good thought, but I do check this also when I check the cam for bent. This cam only had .001" runout. Most cams I see have .002"-.003" runout and they have never been a problem.