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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,224
The Tial uses a metal piston, and stock Porsche wastegates use something like a nomex reinforced rubber/silicone diaphram to operate the valve.
The Tial is a newer design and may be more efficient and reliable, and springs and parts for them are cheaper and easier to get.
and,
The clear or color annodized machined housing of the Tial looks nicer than the rough cast housing of the origonal to most people.

I have a nicely made $79 chinese 46mm Tial copy that came with a polished stainless dump pipe and it also uses the silicone/nomex diaphram but I have not installed it yet since the origonal one works fine.
It's amazing how well it's made at it's price, and I'll probably try it someday
Old 02-23-2008, 10:43 AM
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