[dlb]

my wife's VX has been running great for several months since i finished doing the input shaft bearing, clutch, brakes, etc, but the other day it was pretty hot out (30* C, or 90* F for you yanks) and i noticed a bit of pinging when my dear wife would lug the engine. it was minor but i noticed it, and i know my wife well enough that she is not likely to change her driving habits, so i'd like to prevent any ping if possible. don't suggest ditching the wife, she's pretty good besides her driving style, haha.

i went through my list of ping suspects and everything checks out so far. ignition timing is correct, proper heat range of spark plugs, no vacuum leaks, the temp is rock steady at a bit under halfway on the gauge, and oil and coolant are full with no noticeable consumption. i have never had the head off to inspect the combustion chamber but i guess carbon buildup could be a possibility. i did a compression test a few months ago and the #s were

1 - 200 psi
2 - 205 psi
3 - 200 psi
4 - 200 psi

those seem a little high and also suggest carbon buildup so i'm considering pulling the plugs, filling the chambers with seafoam, and letting it sit for a few days before driving it again. does anyone have any suggestions on other routes for easy combustion chamber cleaning, or anything else i might want to investigate as a possible cause of ping?

thanks in advance.