Power AdderGetting a Supercharger or Turbocharger? Thinking about using Nitrous? All forced induction and N2O topics discussed here.
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
I am planning on running some TRW blower pistons and am curious as to who makes a good ring for my application?
Do i want a Plasma Moly Top Ring and second ring or a chrome top ring or what?
I guess i can ask when i call to order but i wanted to get a recommendation from you guys.
The stainless steel/chrome top ring is much more tolerant of the increased combustion heat that forced induction engine's generate. You don't need or really want to use stainless for the second ring. Moly is fine since the second ring isn't exposed to as much heat as the top ring. Only reason I used two different brands is because I had a set of C&A chrome ZGS rings, but prefer the SpeedPro moly file fit second rings over gapless rings.
File Fit means that the rings are oversized out of the box, and you have to file the ring ends to acheive your desired ring end clearance. Pre-fit, out of the box rings are fine for a production type engine, but for performance engine's you'r better off file fitting them so you have more control over the ring gaps. The Pre-fit rings are going to have more end gap than you would typically need.
I'm also using a relatively cheap set of Speed Pro moly rings, file to fit. My ring gaps are .032 top, .020 second and .020 on the oil scraper rings. HOWEVER, I am using Keith Black hypereutectic pistons which have VERY specific ring end gap requirements- don't use these end gap specs on just any piston. ALWAYS consut the piston maufacturer for ring end gap requirements as well as piston-to-wall clearance recommendations.
BTW- the special coatings and materials used on a set of rings (moly, chrome, whatever) typically only applies to the top compression ring. They second ring is usually just standard cast iron 99% of the time unless it's a really special ring set.
