Ceramic Coated Headers going Flat
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Ceramic Coated Headers going Flat
I just dropped a new 383 stroker in my 67 rs and after just 40 miles, the coating on my new headers is dulling on 4 of the 8 tubes (3 on drivers side and 1 on passenger side?) the dulling is only at the first 6-10 inches from the head. Since header manufacturer has taken them back to re-coat, I won't name them since I think the issue is with my engine? I installed them with the supplied gaskets (which started to blow-out/ leak right away).The engine is a full roller, and was dyno tuned on a DTS before it was shipped so no break-in period was required.Total timming is 36 degrees and all the plugs have a light brown/tan color? I have searched the net for causes and asked every gearhead I know and came up with the following list. Feel free to pick from the list or add your own. Thanks 
Leaky header gaskets, causing turbulance and slowing down the gases as they leave the heads. There is more soot near the damaged tubes?
Too much timming, reduce to 32-34 degrees.
Adjust carb screws (richer).
Vacuum leak at intake,All are tight, will check when running with starting fluid.
Bad PCV valve? (new with engine?).
Leaky header gaskets, causing turbulance and slowing down the gases as they leave the heads. There is more soot near the damaged tubes?
Too much timming, reduce to 32-34 degrees.
Adjust carb screws (richer).
Vacuum leak at intake,All are tight, will check when running with starting fluid.
Bad PCV valve? (new with engine?).
Leaky header gaskets, causing turbulance and slowing down the gases as they leave the heads. There is more soot near the damaged tubes? (this shouldn't matter. if anything those should be cooler because there isn't as much hot exhause getting there)
Too much timming, reduce to 32-34 degrees. (Somewhat agree here unless car is running real good)
Adjust carb screws (richer). (Can't hurt and see if problem goes away)
Vacuum leak at intake,All are tight, will check when running with starting fluid. (doubt this is the problem)
Bad PCV valve? (new with engine?).(really don't think so)
Get a temp gun and check the temp difference in each tube. A new engine is going to run on the hotter side until things break in. Your plugs don't sound like they are too lean though. what is the heat range of your plugs?
Too much timming, reduce to 32-34 degrees. (Somewhat agree here unless car is running real good)
Adjust carb screws (richer). (Can't hurt and see if problem goes away)
Vacuum leak at intake,All are tight, will check when running with starting fluid. (doubt this is the problem)
Bad PCV valve? (new with engine?).(really don't think so)
Get a temp gun and check the temp difference in each tube. A new engine is going to run on the hotter side until things break in. Your plugs don't sound like they are too lean though. what is the heat range of your plugs?
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