Boost Solenoid Hoses.

[707OEY]

Almost completed my engine swap in my 33, just need to know what the following hoses connect to.. (RB25DET)

Do i even need the canister at the front? If someone could join the dots for me i'd really appreciate it.

Also, big black earth wire from near relay box, where do i bolt it on the motor?

Thanks

Shane

[PM-R33]

Done.

Canister is a legal requirement. Vents the fuel tank into the engine. However a lot of people remove them.

[KiwiRS4T]

Hose goes from boost pipe (from I/C to throttle body) to solenoid. Another from solenoid to T. One side of T to bov return pipe other side to w/g actuator. There was a restrictor in there somewhere but I'll be b****d if I can remmeber in which part

[Dingus]

Sorry to dig up old thread, but can anybody tell me where the restrictor should be?

On mine, I have a 6mm line going from the intercooler pipe to the actuator, with a T piece in there that has a 4mm hose going to the bottom of the solenoid, then another 4mm hose from the top of the solenoid to the bov return pipe. My restrictor is in the 6mm hose going from the cooler pipe to the T piece.

I've noticed that it runs 0.3kg/cm2 (~4psi), rising to 0.38kg/cm2 (~5psi) at 4500rpm when the solenoid kicks in. I've disconnected both lines from the solenoid and joined them to test with, and when I do this it make 0.6kg/cm2 (~8psi), so I know it's not something like the gauge reading wrong and leaves me thinking the restrictor is in the wrong spot.

Am I right that I should move the restrictor to the 4mm line going from the T piece to the solenoid?

[JonnoHR31]

what engine? 25 shouldnt have a T piece and restrictor at all. 26 should have the restrictor between the T piece and the bov return, not sure about before or after solenoid though.

[Dingus]

Jonno, it's a 25, and they do for the factory solenoid. Going to see if I can move it to the 4mm hose going to the solenoid tomorrow to see if it makes any difference. In my head it sounds like the right place for it.

[JonnoHR31]

iirc standard 25 setup (r33 25 anyway) has a single boost line from the elbow going into the solenoid, then one line to the actuator and the bleed line back to the intake, no need for restrictors anywhere

[KiwiRS4T]

My post was based on a 96 Nissan Stagea which runs the S2 R33 RB25DET.

[Dingus]

Yeah Jonno, both my old S1 R33 I had, and my S1 Stag (S2 R33 RB25DET) have run the same solenoid setup with the restrictor.

Bob, any chance you've found since your earlier post which hose your restrictor is in?

[KiwiRS4T]

Yeah Jonno, both my old S1 R33 I had, and my S1 Stag (S2 R33 RB25DET) have run the same solenoid setup with the restrictor.

Bob, any chance you've found since your earlier post which hose your restrictor is in?

I know the restrictor does NOT go in the line to the bov return which just leaves 2 options and I am 90% sure that it goes in the line from the intercooler pipe. If you can get a look at a stock car that will confirm the plumbing and also there should be a band marked around the stock line to indicate the position of the restrictor.