Rasp Burr Finish Experiment (Porting)
It all started innocently enough, read the 2 page thread -- right? Then there are links to another thread, with links to Speed Talk, and from there lab papers and YouTube videos... What I find interesting is that the burr finish is yet another method of imparting texture to intake port walls. About 20 years ago -- having never heard of the burr finish -- I started devising a method of my own that I eventually called Powre Lynz. This requires a special tool that carves what look like screw threads into the ports. The 71 page ST thread especially intrigued me as some of the best experts in the business confirmed my theories on the influence of a textured boundary layer. The ST thread is dated 2014, while I had already done Powre Lynz development work and wrote about my results in 2011. One of the contributors on that thread was David Vizard, and I know he read my book in 2011 as I sent him a copy for review. He called me up and told me how at his age with his experience, it's rare he learns much new stuff, but was learning quite a bit from my book.
Thank you so much for the post. I have no idea how this concept eluded me for so long.
Amazon product ASIN 1534919570
It all started innocently enough, read the 2 page thread -- right? Then there are links to another thread, with links to Speed Talk, and from there lab papers and YouTube videos... What I find interesting is that the burr finish is yet another method of imparting texture to intake port walls. About 20 years ago -- having never heard of the burr finish -- I started devising a method of my own that I eventually called Powre Lynz. This requires a special tool that carves what look like screw threads into the ports. The 71 page ST thread especially intrigued me as some of the best experts in the business confirmed my theories on the influence of a textured boundary layer. The ST thread is dated 2014, while I had already done Powre Lynz development work and wrote about my results in 2011. One of the contributors on that thread was David Vizard, and I know he read my book in 2011 as I sent him a copy for review. He called me up and told me how at his age with his experience, it's rare he learns much new stuff, but was learning quite a bit from my book.
Thank you so much for the post. I have no idea how this concept eluded me for so long.
Amazon product ASIN 1534919570