Head cooling issues at 700HP you say?

[Mettler]

Q45Tech has stated a couple of times now that the VH doesn't have the greatest cooling at 700HP+

Well I'm wondering whether there isn't a relatively simple fix for this.

Looking at the 'water jacket to head' holes in the head gaskets, they're tiny 4mm-ish holes, and when compared to the large oval shaped coolant galleries that actually pass from the block to the heads which these little holes gasket up... they look like a bottleneck for coolant flow. I'm not sure on the effect of enlarging these holes in the gasket, but it's a potential avenue to guarantee improved coolant flow at high temperature operation.

Anyone care to theorise on potential pros & cons of said modification? (Assuming you're not going to damage the gasket, or that you're using a custom copper gasket, etc.)

[T45]

My stock HG's had those tiny holes in them but my aftermarket set has oval holes. I don't see any reason that opening them up could be a bad thing. I was wondering the same thing when I was taking the old ones off. I was like WTF, did the gasket get squeezed in there or something. I think one of them was even fully closed not flowing at all.