Fulcrum2000 Posted March 17, 2020 Share Posted March 17, 2020 Hi All I am sure this is going to leave everyone laughing in the aisles at my expense, but I need the advice of more learned men than me in this field. My car is now full BPU with an HKS 6 running both turbos. On the screen it has the PH (highest boost achieved) setting and this reaches 28-30. The BC is set to not go above 17PSI which as we know is the safe limit for JDMs and the tuner says it is fine - so when the PSI max goes to 30 is that the combination of both turbos? Of course the turbos arent hitting 30PSi or they would be coming through the bonnet so I am guessing its saying both are 15? Just wanted to check all was ok before I finally enjoy my car and hopefully dont get the coronavirus! Quote Link to comment Share on other sites More sharing options...
Noz Posted March 17, 2020 Share Posted March 17, 2020 Pressure is equal in a given area. With the turbos both running flat out it will be like two water pipes joining. A max boost value means overall. There is something not right with that. 30 psi is above what I've ever seen possible for stock turbos (unless it's back pressure spike from throttle run off or something). Quote Link to comment Share on other sites More sharing options...
Scooter Posted March 17, 2020 Share Posted March 17, 2020 It needs a passenger monitoring a (steady) run out I think to watch the real time boost and check if it's a spike or spends significant time above 17psi!? Does it not have a audible warning option? Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted March 17, 2020 Share Posted March 17, 2020 Maybe its above atmospheric pressure so 14psi (1bar ish) + 16 (1.2bar ish) = 30psi? Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted March 17, 2020 Author Share Posted March 17, 2020 Maybe its above atmospheric pressure so 14psi (1bar ish) + 16 (1.2bar ish) = 30psi? It was horrendously hard to set up I can send a photo of the lines in the engine bay if you like but basically yes when I got it back it was set to 17.5 across all three parameters and it 33.3 and I thought that was too high so we set all to 17.0 and it now goes to 30. It feels as my previous car did now which was at BPU but it also has an AFR gauge in which is reading within parameters even with WOT. I dont pretend to understand it but I know if it was much above 1.2bar the turbos would not stand it and yes the HKS has an audible warning if the turbos over boost (it basically goes mental) so with that in place and no warnings how on earth can the HP be in early 30s? If it were short spikes I assume this is not harmful to the car and wouldnt I get some crazy AFR readings if it was overboosting? Quote Link to comment Share on other sites More sharing options...
Tommyd16 Posted March 17, 2020 Share Posted March 17, 2020 If the EBC is setup this way has the blank come off or ever fitted? If not it will show massive spikes Quote Link to comment Share on other sites More sharing options...
supradanturbo Posted March 17, 2020 Share Posted March 17, 2020 As swampy said Sounds like it’s showing true pressure. 1mpa 14.7 psi atmospheric pressure plus what ever boost you are running. To make a total of 30psi Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted March 18, 2020 Share Posted March 18, 2020 Yes, as I said it's probably combining atmospheric pressure and boost pressure to give you a high number Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 18, 2020 Share Posted March 18, 2020 Turn the power on but dont start the car what pressure are you reading then ,this will tell you if your reading atmosphere pressure or not. Quote Link to comment Share on other sites More sharing options...
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