Pinging...still haven't figured it out

[Rooster's82]

Originally Posted by LONGHAIR

To exactly what spec? You may still need to retard it a bit. Once the pinging starts, it creates heat...that just makes it worse.

Second, the heat spike is coming from the pinging. Once it starts, is just grows upon itself. A lower temperature thermostat will not do anything. The thermostat is just the "switch" that "turns on" the cooling system. Once it is open, everything is based upon the efficiency of the rest of the system. This means not only the flow of the coolant, but over all heat exchange. The fan may be moving air, but is has to be removing heat with that air. If the fins are blocked of air, no much actual cooling happens either.

I am thinking that this is still an issue of the combination of timing and cooling efficiency....but lean carburetion can be a factor too. What carburetor are you running?

I am running a 600cfm edelbrock. I do have it set pretty lean.

What do you mean..."the fins are blocked or air"? What about adding some "ice" additive to the coolant?

I do think it is a timing issue...the more i look into it the more it seems that i need to retard the timing a little. I am going to barrow a timing light tonight...which direction do i turn the distributor in order to retard the timing?

[MylilBowTie]

CCW counter clockwise

I think, after posting that I keep getting confused myself.

[shadetree]

From the shade of my tree, I ask are the spark plugs the correct heat range? Does "reading" the plugs reveal any good info? Such as; blistered porcelean on the plug, only one plug looking overheated, or all 8? Sometimes going to headers, warmer cam, faster ignition advance curve, ect. dictates a change to colder plugs. Just my 2 cents

[COMP]

Originally Posted by shadetree

From the shade of my tree, I ask are the spark plugs the correct heat range? Does "reading" the plugs reveal any good info? Such as; blistered porcelean on the plug, only one plug looking overheated, or all 8? Sometimes going to headers, warmer cam, faster ignition advance curve, ect. dictates a change to colder plugs. Just my 2 cents

also look for silver spec's ,,,,thats piston

[Rooster's82]

Ok, i will pull the plugs once I'm done putting the exhaust back together. The last time i pulled the plugs (about a month ago) i didn't see any heat related damage. They were totally fouled...but that was from the old carb.

[LONGHAIR]

What do you mean..."the fins are blocked of air"? What about adding some "ice" additive to the coolant?

If the fins between the tubes get blocked, the air doesn't really do much. It can be as simple as bug guts and grass clippings/leaves that block the flow.

Products like "Ice" and "water wetter" are generally made for guys that run straight water. (Race cars) Your normal coolant mix has the surface tension inhibitors and other additives that these products would give you.

[Rooster's82]

Originally Posted by LONGHAIR

If the fins between the tubes get blocked, the air doesn't really do much. It can be as simple as bug guts and grass clippings/leaves that block the flow.

Products like "Ice" and "water wetter" are generally made for guys that run straight water. (Race cars) Your normal coolant mix has the surface tension inhibitors and other additives that these products would give you.

I got you...for some reason i thought "fins" meant blades on the fan...duh. The fins are in real good shape and are totally clean and free of debris.

[airdale94]

I'd check your radiator flow. Pull the cap off first and look down into it and see if the tubes look cloged. You might have to let out some of the coolant. To check the flow you have to pull the radiator and run water through one end (side) with a garden hose and see how well it flows through the tubes.