MPS tunning, Do my plugs seem to lean Options

[Ron914]

I have a 2056 and was advised I should tune my MPS for optimum performance .

I rebuilt it with CFR diaphragm kit so I could dial it in .

I have not tried to tune it yet and am wonder how my plugs look ?

I have to richen the mixture on the ECU to run well (CW).

I understand running lean will cause high heat , which could be part of my problem with high running temperatures .

They look on the rich side to me .

Plugs are in order 1-4 (#3) does not have the number on it.

[worn]

They look about right to me, but you may want to be richer than OK with a 2056. These days an A/F gauge is not that expensive and you can get a bung that clamps on so you do not have to weld. Then you can chase cylinder head temps for #3.

I talked to George Hussey several years ago and as I understood it he suggested that the CHT gauge would simply frighten me most of the time. Apparently you don't have to actually melt the aluminum to cause trouble.