TT , twin waste gates, Greddy profec oled boost controller help!!!
03-06-2017, 01:25 PM
#21
hatersgonnahate
iTrader: (162)
Yeah the 479 made no sense...my haltech reading is under 1.00 typically
your BOV opens in that condition. Its vac line is Post TB and works like a wastegate as well. the 15psi will open the BOV and relieve itself.
your BOV opens in that condition. Its vac line is Post TB and works like a wastegate as well. the 15psi will open the BOV and relieve itself.
03-07-2017, 04:45 PM
#23
hatersgonnahate
iTrader: (162)
why would it overspin? That 15psi will also open your wastegates (depending on spring setting) and since your boost controller should be fed from post TB, it will have 0 boost to help keep the WG shut...even at 100% dc on the boost solenoid valve.
I don't think your scenario is possible for extended amounts of time....its a transient state.
03-15-2017, 08:55 PM
#24
Reading this making me think twice about my current setup. The bottom nipple on my waste gate is connected to the vacuum/boost source on the plenum which is after TB. What difference is it going to make if i connect it before TB?
03-15-2017, 09:54 PM
#25
350Z-holic
iTrader: (13)
Define bottom and top nipple?
I would think it'd make a big difference ...
if you are about to shift at 6000 rpm and youre at 14psi of boost and your TB shuts, your charge pipes (for a brief second until the bov opens) are pressurized while while your plenum is in vacuum - where do you want pressure and where do you want vacuum at that moment when you shift in your waste gates?
I would think you'd want pressure pushing open simultaneously while vacuum pulling open the waste gates to allow exhaust to bypass your turbine? This is how I understand it...
I would think it'd make a big difference ...
if you are about to shift at 6000 rpm and youre at 14psi of boost and your TB shuts, your charge pipes (for a brief second until the bov opens) are pressurized while while your plenum is in vacuum - where do you want pressure and where do you want vacuum at that moment when you shift in your waste gates?
I would think you'd want pressure pushing open simultaneously while vacuum pulling open the waste gates to allow exhaust to bypass your turbine? This is how I understand it...
Last edited by bealljk; 03-15-2017 at 09:56 PM.
03-16-2017, 10:04 AM
#26
Define bottom and top nipple?
I would think it'd make a big difference ...
if you are about to shift at 6000 rpm and youre at 14psi of boost and your TB shuts, your charge pipes (for a brief second until the bov opens) are pressurized while while your plenum is in vacuum - where do you want pressure and where do you want vacuum at that moment when you shift in your waste gates?
I would think you'd want pressure pushing open simultaneously while vacuum pulling open the waste gates to allow exhaust to bypass your turbine? This is how I understand it...
I would think it'd make a big difference ...
if you are about to shift at 6000 rpm and youre at 14psi of boost and your TB shuts, your charge pipes (for a brief second until the bov opens) are pressurized while while your plenum is in vacuum - where do you want pressure and where do you want vacuum at that moment when you shift in your waste gates?
I would think you'd want pressure pushing open simultaneously while vacuum pulling open the waste gates to allow exhaust to bypass your turbine? This is how I understand it...
Top is top, bottom is bottom LOL
Top is what connects to boost controller, bottom is what connects to manifold pressure as far as I know. I went by the instructions with the turbo kit and boost controller.
I do see your point though, you might be right. I'm gonna try to redo mine and see if it makes any difference. The sound the car makes when I let off throttle does sound a bit like compressor surge, so this might be a fix. Took it to few shops and they said its normal.
Turbo kit
Boost controller
03-16-2017, 12:31 PM
#27
350Z-holic
iTrader: (13)
03-16-2017, 01:08 PM
#28
hatersgonnahate
iTrader: (162)
POST tb is for the boost solenoid/map sensor.
Pre TB is for the bottom of the WG so that they open up while the bov is venting the charge pipes.
Bottom/Top port is relative to the actuator head vs the valve body, not in how it is mounted on your car. It is a poppet valve with spring assist closure.
