downimpact Posted March 28, 2011 Share Posted March 28, 2011 (edited) Dyno results from Sunday all figures taken at the wheels, stock 2JZ GTE, seems a suprising drop off between 1st and 2nd turbo. Also thought that boost would be around 0.8 on stock turbos. Is a spring failing on the blow off valve? Any thoughts? first graph run in 4th, second graph in 5th Edited March 29, 2011 by downimpact added 5th gear run (see edit history) Quote Link to comment Share on other sites More sharing options...
aman00123 Posted March 29, 2011 Share Posted March 29, 2011 There's always a dip before the 2nd turbo kicks in, if you think it's dropping too much then i suppose it could be something but no idea what. I got a dip too (mines BPU) my dyno is in this link if you want to take a look? http://www.mkivsupra.net/vbb/showthread.php?233364-Been-On-The-Rollers-(Dyno) Quote Link to comment Share on other sites More sharing options...
hodge Posted March 29, 2011 Share Posted March 29, 2011 You will get a 0.2 bar dip in pressure as turbo 2 comes online as Aman sais. 0.8 bar is normal on a stock setup. I wouldn't worry to much. Get those BPU parts fitted than will make you smile. Quote Link to comment Share on other sites More sharing options...
TTRickeh Posted March 29, 2011 Share Posted March 29, 2011 You're a little bit down on boost you should be seeing 0.1bar - 0.2bar more. Check all hoses are done up tightly and there's not a little boost leak somewhere. Quote Link to comment Share on other sites More sharing options...
downimpact Posted March 29, 2011 Author Share Posted March 29, 2011 You're a little bit down on boost you should be seeing 0.1bar - 0.2bar more. Check all hoses are done up tightly and there's not a little boost leak somewhere. Thanks for he replies this seems the best thing to do. Quote Link to comment Share on other sites More sharing options...
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