View Single Post
up-fixing der car(ma)
YTNUKLR's Avatar
Join Date: Aug 2002
Location: Fremont, CA
Posts: 3,743
Send a message via AIM to YTNUKLR
safe, the original Biral Porsche cylinder was basically a twice-cast piece; it has a cast IRON liner, then some aluminum fins are cast onto the liner. Not necessarily intending to plug JB (though they are good guys in my experience), they have built a cylinder with a STEEL liner, and the aluminum fins are compression fit with something like 11 tons of pressure. There is no separating or washboarding cylinders like that. And, I think the fins are forged and extra-large, rather than cast like the original Biral cylinders. Charles Navarro (of Nickies) posted that steel liners such as the JB Steel, can take something like 120-130K psi, whereas a Nickies takes a still-great 54k psi, and a stock Porsche cylinder takes maybe 20-30k psi. FYI.
Scott Kinder
kindersport @
Old 10-03-2005, 12:51 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)