This is a video about the possibilities of anyone making a casting as good as this one. It centres on the mistakes and traps that many fall into and that if avoided will lead closer to this sort of result.
I have obtained the examples of the traps from other's videos. I do this not to denigrate others but rather to provide helpful clues on how to improve. These others shall remain nameless. I hope that all see this video in this light - if so it is my hope to do further videos explaining in more detail and showing preferred methods. I am indebted to EFI Hardware - my customer for these throttle bodies - who have been kind enough to loan this sample to me - Check out there web site for more information on their products at:-
https://www.efihardware.com
Note that while my comments in this video refer to green sand, my area of expertise - I think they apply equally to petrobond.