HOWTO: RB25DET High Boost mode with standard solenoid

[gotRICE?]

5psi.. or why would it need the solenoid?

[TUF250]

ah ok, i thought maybe the solenoid was to restrict it to 5 from 7. ah well there goes that idea. will keep shopping for a 10psi r32 one. Any diagrams going around to disconnect it once i get the 32 one?

[gotRICE?]

ah ok, i thought maybe the solenoid was to restrict it to 5 from 7. ah well there goes that idea. will keep shopping for a 10psi r32 one. Any diagrams going around to disconnect it once i get the 32 one?

I think i did one a few pages back

[Torques]

Hi!

There is no restrictor as such.

The actuator is subdued to the manifold pressure unless the car reaches 4500 rpm or so.

At this point the solenoid kicks in and reduces the pressure on the actuator, tricking the actuator into 'assuming' the boost is lower than actually is.

The actuator is a 5PSI type ..

Cheers,

Andrew

ah ok, i thought maybe the solenoid was to restrict it to 5 from 7. ah well there goes that idea. will keep shopping for a 10psi r32 one. Any diagrams going around to disconnect it once i get the 32 one?

Edited July 21, 2010 by Torques

[maddowse]

ah ok, i thought maybe the solenoid was to restrict it to 5 from 7. ah well there goes that idea. will keep shopping for a 10psi r32 one. Any diagrams going around to disconnect it once i get the 32 one?

once you have the 10psi actuator the solinoids will be obsolite wont they ??

[Tommy_J]

Who said anything about cutting wires??

[Kinks]

now that's stealthy

[TUF250]

this mod has been around for a while now, how have peoples solenoids held up with being held open 100% of the time when it should normally be momentarily? any solenoid failures?

[sickm8]

could some one please send me a pic of how the vac hoses are ment to be connected to the solenoid because mine has been bypassed and i want to connect it back up.

[Tommy_J]

this mod has been around for a while now, how have peoples solenoids held up with being held open 100% of the time when it should normally be momentarily? any solenoid failures?

...I'll second that. Anyone?

[Bomba]

Attention R34 owners

I have just done this mod without cutting or stripping any wires and it works.

1) Unplug the solenoid

2) Feed wire through the ecu plug side and reconnect plug. (see pics on post 231 on pg12) ignore warning as he had a different problem (see post 355 pg18)

3) Turn ignition on but not engine

4) R34's have an earthing strap from the engine that earths on the chassis just below the solenoid via a spade plug. Attach other end of wire here.

5) You will here the solenoid 'click'.

6) Drive around on high boost below 4500 revs.

Took less time to perform the mod than it did to write this post

Side note for those who want a switch for fuel economy. There are 3 pedals in the drivers side foot well. The far right one is the fuel economy switch. It's a good switch as it's progressive and not just an on/off switch

[Torques]

could some one please send me a pic of how the vac hoses are ment to be connected to the solenoid because mine has been bypassed and i want to connect it back up.

Here you go ...

Edited October 31, 2010 by Torques

[parkie]

Cheers Paul! Just finished doing this mod. Took less than 5mins for someone who doesn't do wiring very often! Noticeable difference in mid rpm range.

[UWAM]

Anyone with an R34 that has done this and felt a difference, before you did the mod, did you see the boost change at 4500 rpm? Using the stock gauge, once I hit max boost around 2800, it doesn't change until the redline.

[SargeRX8]

Is this useless if you have an EBC?

Noobiest question Ive ever asked lol.

Edited December 11, 2010 by SargeRX8

[cannabiscorpse]

Just finished doing this mod to my 95 gtst. It definately works well- my car is registering higher boost at earlier rev range. Best 5 minute job ever.

[Shazza24]

Is this useless if you have an EBC?

Noobiest question Ive ever asked lol.

An EBC is basically a more advanced/adjustable version of the stock solenoid. Normally to fit a EBC the standard solenoid would be removed/disconnected.

[Skavenski]

if you unplug one of the hoses and block it it tricks the solenoid into keeping the wastegate closed for longer coz its getting an inaccurate reading,

by doing this i am running 11psi and only takes 30 seconds to do. seems pretty safe and dont get any boost spikes as far as i can tell

[cannabiscorpse]

if you unplug one of the hoses and block it it tricks the solenoid into keeping the wastegate closed for longer coz its getting an inaccurate reading,

by doing this i am running 11psi and only takes 30 seconds to do. seems pretty safe and dont get any boost spikes as far as i can tell

I had mine off and it definately did the same thing.. I ended up connecting it back up and doing it with the wire, but i am hitting 9 sometimes 10psi and i have only got a cat back and pod. Cant wait for my turbo back..

[S4LVA]

Just wondering, Has anyone had any solenoid problems running this boost mod without a switch from around 2004-07 to now?