SBM Edelbrock/Speedmaster Head Data

Imo, the curve on the cnc SM is as unimpressive as it is because it’s poorly executed.

With a more refined throat and valve job, the numbers in the middle could be noticeably better.

They’re in it for the quick cash and banking on the CNC buzzword for sales.

It’s pretty bad when there are areas near the middle of the curve where the ootb untouched head is better.