Ollieh17 Posted August 12, 2014 Share Posted August 12, 2014 Fitted my greddy profec spec 2 today and nothing i change seems to boost above spring pressure. Running a tial ext gate. Currently have vac line from turbo nipple to bottom port on wastegate teed off to NC on the solenoid. Then have comp going from the solenoid to top port of wastegate.this correct? Quote Link to post Share on other sites
fremyjay Posted August 12, 2014 Share Posted August 12, 2014 Surely the waste gate spring will always open at whatever it is set to? I'm not clued up on it but I though that's how it works, have you tried a 1.0bar spring then lower the boost with controller Quote Link to post Share on other sites
Ollieh17 Posted August 12, 2014 Author Share Posted August 12, 2014 I thought you always run a lower spring and use a boost controller to increase it?? I thought the top port of the wastegate uses boost to keep the wastegate closed Quote Link to post Share on other sites
fremyjay Posted August 12, 2014 Share Posted August 12, 2014 I have no idea then mate but would like to know aswell then as will be doing mine soon Quote Link to post Share on other sites
_shaun_ Posted August 12, 2014 Share Posted August 12, 2014 (edited) U can increase the boost above the wastegate spring pressure but can't lower it with an ebc. The nc port should be tapped into the manifold or other vacuum port and the com one leads out to the top of the wastegate turbo nipple to bottom port of wastegate Edited August 12, 2014 by _shaun_ Quote Link to post Share on other sites
TD04HYBRID Posted August 12, 2014 Share Posted August 12, 2014 Yea you can only increase with a ebc not decrease past the spring. also all ebc should have 2 setting one for external and one for internal wastegate make sure thats been set up correct. Quote Link to post Share on other sites
Ollieh17 Posted August 12, 2014 Author Share Posted August 12, 2014 Thats what i thought. Its second hand from someone running a external wastegate. Otherwise cant see a option to change gate type Quote Link to post Share on other sites
TD04HYBRID Posted August 12, 2014 Share Posted August 12, 2014 Thats what i thought. Its second hand from someone running a external wastegate. Otherwise cant see a option to change gate type did you not get a book with it? Quote Link to post Share on other sites
Ollieh17 Posted August 12, 2014 Author Share Posted August 12, 2014 Found the greddy profec spec 2 instructions online Quote Link to post Share on other sites
TD04HYBRID Posted August 12, 2014 Share Posted August 12, 2014 http://www.greddy.com/upload/file/PRofec_Bspec2.pdfshows you how your vacuum should be rigged up! ill have a look through for external/internal settings Quote Link to post Share on other sites
Ollieh17 Posted August 12, 2014 Author Share Posted August 12, 2014 Thats the one. I have vac hose from turbo nipple with a t piece. So it goes from compressor housing to bottom wastegate port teed off to the nc fitting. Then from com fitting to top of wastegate. As im getting apring pressure imGuessing my issue is from the com fitting onwards? Possibly too small hose? Quote Link to post Share on other sites
TD04HYBRID Posted August 12, 2014 Share Posted August 12, 2014 in the manual ive put up in the trouble shoot section its says boost will not increase = not getting intake manifold pressure/ Check the pressure hose connection to the intake hope that gets you sorted Quote Link to post Share on other sites
Ollieh17 Posted August 12, 2014 Author Share Posted August 12, 2014 thats the pressure hose from the intake that runs into the car and to the main unit yeh? The main unit reads accurately as a boost gauge though Quote Link to post Share on other sites
_shaun_ Posted August 12, 2014 Share Posted August 12, 2014 You may need to try adjust the gain setting on the ebc aswell it will tell you how to in the manual Quote Link to post Share on other sites
Ollieh17 Posted August 12, 2014 Author Share Posted August 12, 2014 Ive tried that right up to 35 maximum . Nothing seems to make a difference Quote Link to post Share on other sites
TD04HYBRID Posted August 12, 2014 Share Posted August 12, 2014 Yeah from the intake to the back of the controller! Yeah having a brief read through that manual it seems it's all to do with the gains and boost cut in! Have you cable ties all connection? Intake/connectors ect?? Quote Link to post Share on other sites
Ollieh17 Posted August 13, 2014 Author Share Posted August 13, 2014 Yup all connections cable tied, dont suspect any leaks. Only thing i can think is the vac hose to the top of the wastegate is too small and restrictive/leaking which isnt allowing the controller to hold the gate shut Quote Link to post Share on other sites
Ollieh17 Posted August 13, 2014 Author Share Posted August 13, 2014 when i start the car the solenoid clicks etc to suggest its working. Read online its worth checking the voltage at the solenoid to ensure wiring is correct? Quote Link to post Share on other sites
Ollieh17 Posted August 15, 2014 Author Share Posted August 15, 2014 Is there a way to test the solenoid is working?The clicking noise was infact something else Quote Link to post Share on other sites
russ78 Posted August 15, 2014 Share Posted August 15, 2014 u can test solinoid by using bits of wire from positive and negative on battery direct to the solinoid you will see and hear it working, it may also need a clean as valve could be stuck use brake cleaner and cotton wool buds youll be suprised the shit that gets clogged up inside Quote Link to post Share on other sites
TimD Posted August 15, 2014 Share Posted August 15, 2014 So the solenoid should have 3 'Ports' One to wastegateOne to turboOne to atmosphere With the solenoid disconnected, physically blow into the turbo port, you should feel air coming out of the wastegate port and visa versa. If you hook it up to 12v, and blow into the turbo port, the air should not come out of the wastegate port, but instead out of the atmosphere one. That's all a solenoid does, directs air, either to or away from your wastegate. Quote Link to post Share on other sites
Ollieh17 Posted August 15, 2014 Author Share Posted August 15, 2014 Unplugged the air comes out of the atomsphere one, havent tried it plugged in yet Quote Link to post Share on other sites
TimD Posted August 15, 2014 Share Posted August 15, 2014 Do you know how a wastegate works? Because if the above is true, and the solenoid wasn't working you'd be getting an overboost condition, not wastegate boost pressure. Quote Link to post Share on other sites
Ollieh17 Posted August 15, 2014 Author Share Posted August 15, 2014 I do. Turbo nipple is tee'd off to the bottom wastegate port and then to NC port on the solenoid. Then COM is plumbed in to the top wastegate port. Therefore if when blowing into air is going through NC and out to atmosphere its basically just leaking boost. The fact the bottom wastegate is still plumbed into the turbo the wastegate will open above spring pressure and not over boost. Quote Link to post Share on other sites
Ollieh17 Posted August 15, 2014 Author Share Posted August 15, 2014 with 12v to the solenoid NO shuts and blows through COM and NC Quote Link to post Share on other sites
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