Cast or Alum.heads for racing.

pettybludart said
What does everyone think is better for a racing engine?Cast W2 heads or the Eddy RPM aluminum heads?I was talking to an old friend(engine machinist)and he was telling me to go with some cast heads,he said the aluminum ones don,t like the heat(crack)when put on a cast block.I,m thinking about building another stroker motor,but need some other opinions on the cast (W2) heads.Any help?Thanks.


P.S Everyone is entitled to their own opinion.:toothy10:
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Did I miss something here? Pettyblu made no mention of $$. I happen to own a set of Eddy RPM's, but the W2 IS a Racing head and Does outperform the Eddy. The notion that it doesn't make enough extra power to haul itself down the track due to its extra weight is silly.