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I love the big valves, but I gotta ask... what happened to the cooling passages and why?
I just eliminated the center hole, somewhat as a test to see if it was necessary.
And because it needed to be welded up and I didn't want to fiddle with replacing that insert.
And I wanted to force the coolant to the back of the head.
I thought that center hole tends to bypass the back half of the head.
In a perfect world, I wanted the biggest hole at the back of the head,
But that is not what the head gasket has.
Also, I was of the mindset of less surfaces to corrode in the future....
It seemed to work OK, ... to a point.
One problem with the smaller holes is they tend to corrode CLOSED, ...with lack of use!
BTW, that picture is of a later head that has BIG holes for some of the head bolts.
Id think on a tighter circuit with shorter straights and some speed carrying corners you might be looking good Dan.You have to look close but the Weekend Racer is on the front Straight At Fontana, Maybe for the last time...
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