NHRA 2020 Rule Amendment SS Intakes???

[SSDiv6]

Originally Posted by bykr

Look at it this way.If a cylinder head had 200 cc port volume and you mill away 20 cc's with this angle milling. You now have a head with 180cc's that you can open up to the 200cc spec. which then could perform like a non angle milled 220cc head. Why else would they do this?

Get off the pipe. Your statement shows the lack of knowledge of porting cylinder heads.

It is not about volume, it is about CSA, volume and shape of the port. You can have a 230cc port volume that is outperformed by a 200cc port volume.