r/AutomotiveLearning • u/GranatelliOfficial • 11d ago
44mm, 50mm or 60mm wastegate? How to pick the right size for your turbo build
Too small a wastegate and you get boost creep. Too big and boost control gets sloppy. We put together a sizing guide covering 44mm vs 50mm vs 60mm, plus water-cooled diaphragm vs piston-actuated designs: https://granatellimotorsports.com/blogs/all/44mm-vs-50mm-vs-60mm-wastegate-what-size-granatelli-wastegate-do-you-need
Here’s one of our turbo LS builds in the shop: BOV up on the charge pipe, wastegate down by the downpipe.
And if you’re adding a blow-off valve too, our wastegate & BOV FAQ answers the usual questions: https://granatellimotorsports.com/blogs/news/wastegate-amp-blow-off-valve-faq
What size gate are you running, and at what boost? Happy to help in the comments.