Guest Tailwind Posted October 9, 2002 Report Share Posted October 9, 2002 Just a quick question or two for mild curiousity. Do many turbos use ceramic turbine blades or are they frowned upon because of an increased possibility of breaking at higher spin speeds? And then is it better to look for turbos that use the special ball bearings or the regular fluid bearings?? Thanks, just wondering..you know, future shopping list Quote Link to comment Share on other sites More sharing options...
Science Abuse Posted October 10, 2002 Report Share Posted October 10, 2002 Ceramic blades? I'm thinking that would eb bad. Maybe on a deisel that onlyy sees 2000 rpm, but I'd theink that the brittle ceramic would not like high reving engines. As for Ball bearing vs oil, i've heard people on both sides ofit, some say bearings aren't neccesary, some say they are. At the very least its less friction, should help to spool it. Anyone heard anything about the longevity of BB turbos? I'd think a slight oiling misshap could be costly. Quote Link to comment Share on other sites More sharing options...
Guest Tailwind Posted October 10, 2002 Report Share Posted October 10, 2002 Okay, see I had never heard anything about ceramic blades before either until I saw something to the point in a website. My guess is they were using the ceramic blades because they're lighter?? thereby letting the turbo spool earlier. Or that is what I gathered out of it. Quote Link to comment Share on other sites More sharing options...
controler Posted October 10, 2002 Report Share Posted October 10, 2002 Yeah, both the items your talking about decrease spool time for faster boost. Depending on the turbo, ball bearing shafts can decrease full boost time by 500 rpms. There are several turbos made by toyota that had cermic COMPRESSOR wheels. I am not sure about the turbine side. They are lighter than steel blades. MkIV supras in japan had these (ct12a) and did spool faster, but the a/r of the turbine didn't allow them to produce as much boost, but that was just the design of that paticular turbo. Quote Link to comment Share on other sites More sharing options...
nocab72 Posted October 10, 2002 Report Share Posted October 10, 2002 my .02, BB turbo's are typically more expensive to rebuild if they are rebuildable at all. k Quote Link to comment Share on other sites More sharing options...
20G TSi Posted October 10, 2002 Report Share Posted October 10, 2002 the factory stock grand national GNX turbo used a ceramics. Quote Link to comment Share on other sites More sharing options...
20G TSi Posted October 10, 2002 Report Share Posted October 10, 2002 Originally posted by JustOneEggBeater: my .02, BB turbo's are typically more expensive to rebuild if they are rebuildable at all. kconfirmed.... a close friend converts the turbos from sleve to bb design for the lingenfelter vettes. they are not rebuildable, and they do NOT carry a mfg. warrantee, although you may find a aftermarket supplier willing to offer a warrantee. Quote Link to comment Share on other sites More sharing options...
Guest Tailwind Posted October 10, 2002 Report Share Posted October 10, 2002 Cool..thanks for the clarification. Quote Link to comment Share on other sites More sharing options...
91TrdMr2T Posted October 15, 2002 Report Share Posted October 15, 2002 stock turbos on skylines are ceramic , and the j-spec turbos on most toyotas are ceramic,the a guy runnig a stock ct20b on a mr2 which is ceramic and hes running 11's or 12's cant remember for sure. Quote Link to comment Share on other sites More sharing options...
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