Guest pharmed Posted June 20, 2015 Share Posted June 20, 2015 Hi all, have a weird problem with a single turbo 1jz. The turbo is a HY35 from compressor racing which is claimed full spool by 2500-3000 rpm. Yet we are not seeing full boost until 4000 rpm. No obvious big boost leaks by visual inspection and manifold doesn't sound blowy. Any ideas??? Link to comment Share on other sites More sharing options...
P_Bazz Posted June 20, 2015 Share Posted June 20, 2015 On what engine was the turbo before/tested? The displacement, exhaust manifold, intercooler setup, boostcontroller setup and a lot more things have influence on the spool of a turbo. If the turbo was on the exact same engine with the same setup and map etc. etc. and is now that much slower obviously something is wrong but otherwise I would question that what is "claimed" actually applies for your engine and setup. Link to comment Share on other sites More sharing options...
Guest pharmed Posted June 20, 2015 Share Posted June 20, 2015 Same engine (came off an s15 running a 1j with stock ecu only difference was 380cc injectors and I have 440cc) Link to comment Share on other sites More sharing options...
Guest pharmed Posted June 29, 2015 Share Posted June 29, 2015 Sorted! Simple vacuum leak oops. Link to comment Share on other sites More sharing options...
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