Spark Plugs, gap and timing on stock 454

[MohaveChuck]

I noticed lack of power and black transom at the end of a good run on Sat.
So I am thinking the timing is off. I pulled a plug and it sure was black. I am running Champion RV12C plugs. Very Stock 454 probably original, in a 30 yr old Spectra 20 V-drive, points and condenser ignition. What should my timing be? and what do you guys think of the plug selection?
Thanks,
Chuck

[Moneypitt]

The plugs aren't the problem, carburation is where you need to look. late timing will affect performance, but the black sooty plugs are a sign of loading up. Idleing around will load it up, but a good hard run should clean it out, and the transom coloring may be a result of the idleing. What carb is on it, and when was the last time it was gone thru?...As far as gap, .035 with that ignition, and a max (ballpark) advance of 28-32 degrees @ 3000. That's MAX, initial should come out about 10-12, depending on the amount of advance in the dist. This can be tough to set without a "dial back" timing light........MP

[MohaveChuck]

MP,
I don't know when the carb was last rebuilt. I will this winter though. I am going up this weekend to change those plugs and check the timing. I don't have a dial back timing light but may get one by Fri. I am not too concerned about the loading up, more concerned about the lack of power and I hope the timing is the problem. Also a great excuse to go up again to "work" on the boat and hit Laughlin. (shhh don't tell the wife)
Chuck

[MikeF]

TOO MUCH FUEL. :rolleyes: MP pretty much :hammer2: it.
:clover:

[sgdiv7]

check the points I bet you find the dwell off. If they are off by a bunch it could make the carb. drip from a bad vacuum signal and that would be your rich condition. If the points are good bring the carb back and I will look at it for you. Single point 30 deg. duel points 34 deg. dwell. Or .016 single .017 duel
I think, Its been a while sense I have done points.
Bill

[SANGER-RICH]

If you are running a point distrubitor, shoot change it to a HEI you wont regret it :idea: :hammer2:

[MikeF]

div7 makes a good point! Engine will not run well w/ incorrect dwell setting = not correct spark. :) Simple adj, just need a dwell meter to set correctly.

[MohaveChuck]

Ok I am checking the Dwell also. I will be going with a HEI this winter I just need it to get through a couple of more trips before I drag it back from Mohave.
Thanks all,
Chuck