Fulcrum2000 Posted March 24, 2017 Share Posted March 24, 2017 Hi All Just bought my third Supra, after previously owning a Mk III and another TT Mk IV I found a jet black MKIV TT and couldnt resist the urge! As we all know with buying a 24 year old car, there's a lot of work to be done! All tyres have been replaced, its had a full service, brakes stripped down and checked, timing belt checked, new plugs, loads more. Still lots to do but during the service Ihad these brass 'boost blocks' removed off the air lines - these things were allowing the turbos to boost to over 1.5 on my aftermarket gauge (and allowing the fuel cut to bang in too) and I thought it was pretty hard on the Supe so had them removed. Does anyone else have any history of these things as with it the car just flew (its pretty quick without though) if not a little roughly. Also does anyone here know of any previous owners of my car its a 93 black Supra L141 PRB and seems to have been off the road in storage for about 4 years prior to the last year or so? Steve Quote Link to comment Share on other sites More sharing options...
Ric Posted March 24, 2017 Share Posted March 24, 2017 The manual boost control valves are a bit naughty. As you've described, they will work but then the turbos will overboost. You'd need to install a restrictor ring in the exhaust to limit the turbos to a safer limit, around 1-1.2bar. Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted April 1, 2017 Author Share Posted April 1, 2017 Thanks so much I finally decided to have them removed I just didnt want them to damage anything and came to the same conclusion. I've kept them though just in case! Quote Link to comment Share on other sites More sharing options...
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