GTR Fever Posted January 31, 2012 Share Posted January 31, 2012 hey guys..i've seen alot of people saying that have fitted a restrictor ring on BPU setups...what exactly is it and what are its benefits? thanks in advance Link to comment Share on other sites More sharing options...
Samurai 20V Posted January 31, 2012 Share Posted January 31, 2012 Click the BPU link in your post, you will get a full explanation on BPU and the usuage of a restrictor ring. Link to comment Share on other sites More sharing options...
mellonman Posted January 31, 2012 Share Posted January 31, 2012 they stop you over boosting, so you can up the boost with a controller safely Link to comment Share on other sites More sharing options...
Dnk Posted January 31, 2012 Share Posted January 31, 2012 they stop you over boosting, so you can up the boost with a controller safely on a j spec tt, uk tt doesn't need one Link to comment Share on other sites More sharing options...
Lude Posted January 31, 2012 Share Posted January 31, 2012 when you remove the stock catylic converters, it automatically increases the boost. the boost levels are too high, so you need to bring the boost levels back down, by putting in a restricotr ring. Link to comment Share on other sites More sharing options...
mellonman Posted January 31, 2012 Share Posted January 31, 2012 yes very true you dont need a restrictor ring for uk/us or hybrids, just the jspec ceramic Link to comment Share on other sites More sharing options...
mellonman Posted January 31, 2012 Share Posted January 31, 2012 when you remove the stock catylic converters, it automatically increases the boost. the boost levels are too high, so you need to bring the boost levels back down, by putting in a restricotr ring. depends on exhaust system you have some are more restrictive the others like the the stock one Link to comment Share on other sites More sharing options...
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