Chris Wilson Posted September 12, 2007 Share Posted September 12, 2007 I have just examined a pair of UK spec, (4 bolt fastening) turbos that have come off Pete Sharps UK MKIV auto. As far as I know these are factory original, and they have CERAMIC exhaust wheels in them... Anyone else found this? I have little to do with hybrids or modding stock turbos, has anyone actually checked their unmolested UK turbos to see if the exhaust wheels are none magnetic ceramic, or magnetic steel? You can easily tell if the turbo is UK or J-Spec, the UK ones have 4 holes where they go over the exhaust manifolds 4 studs, the J-Spec ones have 3 studs in the manifold, and a corresponding 3 holes in the turbos. Quote Link to comment Share on other sites More sharing options...
bromy Posted September 12, 2007 Share Posted September 12, 2007 Are you sure the impellors are not stainless steel as this is non-magnetic Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 12, 2007 Author Share Posted September 12, 2007 Definitely ceramic. Quote Link to comment Share on other sites More sharing options...
Nic Posted September 12, 2007 Share Posted September 12, 2007 According to the Toyota EPC there was only ever one version of the UK spec turbos fitted. ie, only one part number for both turbos. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 12, 2007 Author Share Posted September 12, 2007 Hmmm, are the steel internals on UK turbos another urban myth? The extra lag just down to different sizing and different cams / mapping? Or has someone actually got a UK turbo with a metal turbine wheel to hand? I'll ask my rebuilders tomorrow. Thanks Nic. Quote Link to comment Share on other sites More sharing options...
Branners Posted September 12, 2007 Share Posted September 12, 2007 from many years ago I have this post http://www.mkivsupra.net/vbb/showthread.php?s=&threadid=680&highlight=turbo Shows the internals side by side. I did hear a rumour that some US turbos have a different part number and a further rumour that they were ceramic internals, but never ever heard it from anybody ever again so cant say if its true or not. JB Quote Link to comment Share on other sites More sharing options...
Scooter Posted September 12, 2007 Share Posted September 12, 2007 are vvti jap turbo's 3 bolters? Quote Link to comment Share on other sites More sharing options...
michael Posted September 12, 2007 Share Posted September 12, 2007 You got my old ones years ago Chris, I guess you didn't notice anything odd about them, I certainly didn't. Quote Link to comment Share on other sites More sharing options...
matt k Posted September 12, 2007 Share Posted September 12, 2007 I've got my Uk turbos in the garage, i will have a look on my day off (fri). Quote Link to comment Share on other sites More sharing options...
Nic Posted September 13, 2007 Share Posted September 13, 2007 Any part numbers on the turbo at all Chris? I've checked the UK and European model Supra on the EPC and they both use the same turbos, part numbers: Front - 17201-46030 Rear - 17208-46030 I'll check the US turbo part numbers later. Quote Link to comment Share on other sites More sharing options...
Nic Posted September 13, 2007 Share Posted September 13, 2007 Pics here of the US turbos which look like steel http://mkiv.com/techarticles/parts/stock_turbo/index.html Quote Link to comment Share on other sites More sharing options...
Jspec Germany Posted September 13, 2007 Share Posted September 13, 2007 Sounds like someone swapped the turbos somewhere along the line. Is that possible? Could they have been sold as "hybrids"? Maybe the originals blew and someone swapped in the Jspecs. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 13, 2007 Author Share Posted September 13, 2007 Sounds like someone swapped the turbos somewhere along the line. Is that possible? Could they have been sold as "hybrids"? Maybe the originals blew and someone swapped in the Jspecs. J-Specs have 3 bolt fitting, these are 4 bolt... I'll ask Peter if they have ever been swapped out. Quote Link to comment Share on other sites More sharing options...
Nic Posted September 13, 2007 Share Posted September 13, 2007 I checked the US spec turbos and they are the same part numbers as the UK/Euro ones. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 13, 2007 Author Share Posted September 13, 2007 Turbo Dynamics have had at least one set of UK spec turbos through their hands with ceramic exhaust wheels. I am sending them a photo of the turbine wheel, they can ID it against a pair they have there, as to metal or ceramic. The magnet test is inconclusive though, as the wheels can be Inconel, which is none magnetic, but obviously, metallic. I scratched the "nut" with a die grinder and it sure seems ceramic to me! Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 13, 2007 Author Share Posted September 13, 2007 They are ceramic, I just broke a turbine wheel *issing about with it It's no problem, they are for rebuilding anyway. Odd though, how some were ceramic, some metal. Maybe explains why my seat of pants tells me a few UK cars have less lag than others? Quote Link to comment Share on other sites More sharing options...
Pete Posted September 13, 2007 Share Posted September 13, 2007 It's no problem, they are for rebuilding anyway. Well they are now!! Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted September 13, 2007 Share Posted September 13, 2007 J-Specs have 3 bolt fitting, these are 4 bolt... I'll ask Peter if they have ever been swapped out. Has the housing just been swaped over? so the j-spec catridge is being used in a UK ex/housing Quote Link to comment Share on other sites More sharing options...
Jspec Germany Posted September 13, 2007 Share Posted September 13, 2007 Has the housing just been swaped over? so the j-spec catridge is being used in a UK ex/housing That's what I was trying to say earlier, but my fingers didn't translate what my brain was thinkin. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 13, 2007 Author Share Posted September 13, 2007 Is that possible? Something else to try sometime! Quote Link to comment Share on other sites More sharing options...
Sharpie Posted September 13, 2007 Share Posted September 13, 2007 I go to Berlin for a few days and what do I find upon my return Well I never.....I bought the car off a Toyota Dealership in early 2002 and it was bone stock, not even an air freshener. The car was originally sold at this dealership and had been maintained all it's life 81K miles their also. I did not ask if specific parts (bar cam belt) had been replaced but, nothing major turned up when they searched their records in addition to the paperwork I had. Can you see the difference by looking at a photo ?? if so, could you post up a photo Chris ? Quote Link to comment Share on other sites More sharing options...
Jspec Germany Posted September 13, 2007 Share Posted September 13, 2007 I may have a line on a set of JDM tubbies. Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted September 13, 2007 Share Posted September 13, 2007 Is that possible? Something else to try sometime! I guess with a UK manifold to suit the 4 bolt pattern, uprated WG actuators and the like it could be.... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted September 13, 2007 Author Share Posted September 13, 2007 I go to Berlin for a few days and what do I find upon my return Well I never.....I bought the car off a Toyota Dealership in early 2002 and it was bone stock, not even an air freshener. The car was originally sold at this dealership and had been maintained all it's life 81K miles their also. I did not ask if specific parts (bar cam belt) had been replaced but, nothing major turned up when they searched their records in addition to the paperwork I had. Can you see the difference by looking at a photo ?? if so, could you post up a photo Chris ? If I haven't sent them for rebuild I'll show you when you pick the car up Pete. Otherwise I'll get you some pics. The new hybrids definitely have metal wheels! Your exhaust gas valve butterfly was semi seized, I've found you a perfect one, and fitted that. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted September 13, 2007 Share Posted September 13, 2007 Cheers Chris Quote Link to comment Share on other sites More sharing options...
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