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Old 07-30-2020, 10:46 PM   #145
Lee Stohr
Junior Member
 
Join Date: Jul 2020
Location: Washington state
Posts: 10
Default Re: The Terry Burtz 5 main bearing engine blocks are back on track.

Hi Terry,
Great to hear from you. Thanks for the kind words on the Christie project.
I do not know what foundry cast the Ford centennial blocks, but I currently use Northfield foundry. As you say, the tooling design is very important. I design my own molds and I go to great lengths to make the foundry's job as easy as possible. I think that reduces the scrap rate. We have been very lucky and the first casting of each new block has been good.
I do not know any foundry that gives a written guarantee, even if they make the patterns. I have been fortunate to work on some higher end cars, but it doesn't matter to the foundry if it's 4 cylinder Ford or a 4 cylinder Miller block. (two blocks make a straight eight Miller). I do use 3D printed cores, because my quantities are not high, so I don't spend money on permanent core boxes. I can do some interesting things with printed cores, and change them anytime I want with a few strokes on the computer.
Anyway, I can't wait to see your new parts in August!
Lee Stohr is offline   Reply With Quote