andz222 Posted March 29, 2012 Share Posted March 29, 2012 (edited) Low boost 1.2 High boost 1.4 is this normal on stock twins Edited March 29, 2012 by johnny g (see edit history) Quote Link to comment Share on other sites More sharing options...
Nic Posted March 29, 2012 Share Posted March 29, 2012 (edited) 1.2bar is considered the maximum when running stock turbos, above that and you risk the ceramic turbine(s) going :bang:You also risk dangerously high exhaust temps and the AFR's running lean. Click -> BPU for more info Edited March 29, 2012 by Nic (see edit history) Quote Link to comment Share on other sites More sharing options...
johnny g Posted March 29, 2012 Share Posted March 29, 2012 Moved and tidied up. I guess you have a boost controller installed? Assuming you're full BPU on UK Turbos, that's ok. If you're full BPU on JDM Twins, you're 0.2 high on each. 1.0bar and 1.2bar. Quote Link to comment Share on other sites More sharing options...
andz222 Posted March 29, 2012 Author Share Posted March 29, 2012 yes im full bpu on jdm twins when i set the controller to high it hits 1.4 bar is this normal Quote Link to comment Share on other sites More sharing options...
Nic Posted March 29, 2012 Share Posted March 29, 2012 yes im full bpu on jdm twins when i set the controller to high it hits 1.4 bar is this normal What boost controller is fitted? You'll need to adjust the settings. Quote Link to comment Share on other sites More sharing options...
andz222 Posted March 29, 2012 Author Share Posted March 29, 2012 Greedy boost controller have no clue on how to use the dam thing Quote Link to comment Share on other sites More sharing options...
Nic Posted March 29, 2012 Share Posted March 29, 2012 Greedy boost controller have no clue on how to use the dam thing Instructions manuals http://www.greddy.com/tech-support/profec-boost-control Quote Link to comment Share on other sites More sharing options...
johnny g Posted March 29, 2012 Share Posted March 29, 2012 Until you know, switch it off and run off the stock wastegate, you won't overboost then. Quote Link to comment Share on other sites More sharing options...
andz222 Posted March 30, 2012 Author Share Posted March 30, 2012 can i just leave the boost controller off at all times and run of the stock wastegate all the time Quote Link to comment Share on other sites More sharing options...
Dim Sum Posted March 30, 2012 Share Posted March 30, 2012 yes you can. But you be without it the supra feels slow, but its your call especially when you are not sure how to adjust the setting on the controller Quote Link to comment Share on other sites More sharing options...
johnny g Posted March 31, 2012 Share Posted March 31, 2012 can i just leave the boost controller off at all times and run of the stock wastegate all the time Get yourself over to a trader from here and let them set it up. Try Whifbitz or SRD Quote Link to comment Share on other sites More sharing options...
andz222 Posted May 1, 2012 Author Share Posted May 1, 2012 Get yourself over to a trader from here and let them set it up. Try Whifbitz or SRD i have a 1.2 bar restrictor ring installed daily driveing low boost setting 1 bar when i set the controller to high boost setting the needle hits near 1.4 bar on the boost guage is this normal Quote Link to comment Share on other sites More sharing options...
pedrosixfour Posted May 1, 2012 Share Posted May 1, 2012 i have a 1.2 bar restrictor ring installed daily driveing low boost setting 1 bar when i set the controller to high boost setting the needle hits near 1.4 bar on the boost guage is this normal Totally. Now re-read the thread. Quote Link to comment Share on other sites More sharing options...
Nic Posted May 1, 2012 Share Posted May 1, 2012 (edited) i have a 1.2 bar restrictor ring installed daily driveing low boost setting 1 bar when i set the controller to high boost setting the needle hits near 1.4 bar on the boost guage is this normal A boost controller can only raise the boost pressure it cannot reduce the pressure. There is no such thing as a 1.2bar restrictor ring, it is just a piece of metal with a hole in it, the diameter of the hole will effect the restriction in the exhaust that is created, the boost pressure will vary from car to car; ambient temps, the exhaust fitted, decat pipes fitted, etc. will all effect the boost pressure that the car will make. What boost pressure does the car make with the boost controller turned off? If it makes 1.2bar, then leave it turned off - the turbos will not last long at 1.4bar. If you want to use the boost controller then you'll need to fit a different restrictor ring with a slightly smaller diameter hole so that the boost is around 1bar with the BC turned off, you can then use the boost controller to raise the boost to a safe 1.2bar. Edited May 1, 2012 by Nic (see edit history) Quote Link to comment Share on other sites More sharing options...
letmeshowyou Posted May 1, 2012 Share Posted May 1, 2012 Great advice Nic (and I also agree with the people who said take it to a trader for set up, unless there is someone local you trust to have a play!) Quote Link to comment Share on other sites More sharing options...
skyline1 Posted May 1, 2012 Share Posted May 1, 2012 some good stuff here, as im still a supra virgin (dont yet have one) does anyone hava picture of the restrictor ring fitted in the pipe also is there much size difference in the rings to lower the boost?. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted May 2, 2012 Share Posted May 2, 2012 By not following the advice on this thread, you would risk some extremely expensive damage to your engine. be warned! Quote Link to comment Share on other sites More sharing options...
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