Greddy Profec - A Rb26Dett

[LeeKisum]

Hi! I am a newcomer to this site (Hopefully this thread is in the right place) and i already have a problem.

The problem is my EBC, i did get it wired and running but the Greddy boost solenoid box (The one with 4 nipples, 3 on the front and one in the back) is just space science, i've seen a lot of discussion related to these issues but they never gave me an answer.

I'd appreciate it very much if someone who knows and possibly has done this install would enlighten me a little.

Ok, so the original RB26DETT Boost solenoid has 2 vacuum lines in it, one is for certain the actuator line but what is the second one? when installing the Greddy solenoid can i totally REMOVE the original boost solenoid? Greddy instructions tells me to connect nipple number one to INTAKE MANIFOLD, but for god sakes where? the second nipple to PRESSURE SOURCE, it maybe simple? And the third nipple should be connected to ACTUATOR... I know, that there is a vacuum line behind the plenum, which should be connected, would it be the one this device want's to a intake manifold nipple on the greddy solenoid?

If anyone has done this the way it is working i'd appreciate a little help here, anyone has pics or something about the install? Most help would be if someone could tell me where to connect each Greddy solenoid's nipple AND if possibly the original boost solenoid is replaced by the Greddy solenoid. Thank you guys, in advance!

Regards. William

[Moodles2]

Standard solenoid uses 2 lines, Intake Manifold source and Wastegate actuator source, I can't remember which one is which, but with the engine running one of those lines will have vacuum while idling, that will be the intake manifold line (which runs to the back of the plenum near the clutch, but it's not an ideal intake manifold pressure source since it's already being bled, it's best to run another line for the intake manifold after the TB's) .

Pressure source is different from the intake manifold, pressure source can be T'd off at the stock boost map sensor (black box on the firewall near the brake master cylinder) which runs after the balance tube and the fuel pressure regulator (some people T off at the regulator as it will be slightly quicker to read pressure changes).

The nipple on the back is probably used to bled air and doesn't need to be connected to anything, the stock solenoid is a different type of solenoid as it blocks the line whereas aftermarket solenoids (mac valves) bleed air instead.

[LeeKisum]

Standard solenoid uses 2 lines, Intake Manifold source and Wastegate actuator source, I can't remember which one is which, but with the engine running one of those lines will have vacuum while idling, that will be the intake manifold line (which runs to the back of the plenum near the clutch, but it's not an ideal intake manifold pressure source since it's already being bled, it's best to run another line for the intake manifold after the TB's) .

Pressure source is different from the intake manifold, pressure source can be T'd off at the stock boost map sensor (black box on the firewall near the brake master cylinder) which runs after the balance tube and the fuel pressure regulator (some people T off at the regulator as it will be slightly quicker to read pressure changes).

The nipple on the back is probably used to bled air and doesn't need to be connected to anything, the stock solenoid is a different type of solenoid as it blocks the line whereas aftermarket solenoids (mac valves) bleed air instead.

So simply there is no idea of disabling the standard boost solenoid? I just T from the actuator hose which leads from wastegates to standard boost solenoid? Any good place to connect to the plenum, what you mean By TB's?

[LeeKisum]

So simply there is no idea of disabling the standard boost solenoid? I just T from the actuator hose which leads from wastegates to standard boost solenoid? Any good place to connect to the plenum, what you mean By TB's?

TB= throttlebody my bad!

[Moodles2]

Just disconnect the power plug, there is no reason to keep using the factory solenoid. You can re-use the actuator line the factory setup uses, but you can't re-use the intake manifold line as it's from an already bled location.

TB's = throttle bodies. You will need to blank off the factory intake manifold line, and run a new one.

One of the lines going into the factory solenoid has a restrictor inside the hose (indicated by a yellow band), if this is the factory wastegate line (I can't remember which is which), then you will need to remove that restrictor or cut off that piece of hose as it will interfere with the EBC. If the yellow band is on the intake manifold hose, don't bother.

[LeeKisum]

Thank you for these tips they will get me far in the process, just that if i have to blank the standard solenoid's intake manifold pipe and therefore can't use it in connecting the Greddy solenoid's intake manifold nipple where should i connect it in before TB's? Is there another line that is not already bled? Don't know but it seems logical to me to connect both of the standard solenoid's pipes in greddy's intake manifold and wastegate nipple's, greddy solenoid seems to be exactly the sameissa but it needs pressure source to read boost compared to MBC which doesn't need to read the boost to adjusting?!

[LeeKisum]

Thank you for these tips they will get me far in the process, just that if i have to blank the standard solenoid's intake manifold pipe and therefore can't use it in connecting the Greddy solenoid's intake manifold nipple where should i connect it in before TB's? Is there another line that is not already bled? Don't know but it seems logical to me to connect both of the standard solenoid's pipes in greddy's intake manifold and wastegate nipple's, greddy solenoid seems to be exactly the same but it needs pressure source to read boost compared to MBC which doesn't need to read the boost to adjusting?!

[LeeKisum]

Ok, now i have connected it this way: one nipple on the greddy(Pressure Source) is T'ed to the black box behind brake Master cylinder and Greddy's actuator nipple i plumbed to standard solenoid's wastegate hose, i cut off the standard solenoid's other hose's restrictor and put it back and unplugged the standard solenoid. Then i have left with one empty nipple which should be connected to plenum, where should i put it?