HOWTO: RB25DET High Boost mode with standard solenoid

[guricha]

thanks for this mode:) its working i jast change graunding place now in second gear shows -8 PSI:) thanks again

Edited February 4, 2007 by guricha

[R33LIN]

hey all,

the idea of the switch is a good idea to control when you want highboost or when u want two stage boost.

ANYONE got pics of their switch, or installation of the switch that they could post up.

assuming you cut the black wire and ground it, without using a switch.

just a quick question?

is this mod reversible? like if u want the two stage boost again without using a switch. further down the track could u reattach/solder the black wire through its original path again? or is stuffed once cut?

hopefully someone can help?

Cheers

Edited February 7, 2007 by R33LIN

[XRAIDER]

hey all,

the idea of the switch is a good idea to control when you want highboost or when u want two stage boost.

ANYONE got pics of their switch, or installation of the switch that they could post up.

assuming you cut the black wire and ground it, without using a switch.

just a quick question?

is this mod reversible? like if u want the two stage boost again without using a switch. further down the track could u reattach/solder the black wire through its original path again? or is stuffed once cut?

hopefully someone can help?

Cheers

I would imagine that you could solder the wire again, I just bought a 4 buck switch from supercheap, and mounted it in the dash I drilled a hole in the removable pushout panel thing, its just a simple on off switch,

I cbf running the wire through the firewall so i ran it next to the loom that follows the strut and continues to the wiper motor, then into the gaurd and the door, i know crap way of doing it but it works, BTW heres a pic or two!

[so_tred]

Just did this on my R34 this afternoon, it works..it's now hitting 8psi at about 2,500rpm.

Will be hooking up a switch next weekend to switch between high boost & low/hi boost.

Also, in the pic it looks like the black wire to the plug is still connected but it's not - it's just tucked back into the black surround.

Question:When I put on a full turbo back 3 inch exhaust this will be rendered unnecessary, correct?

Edited February 18, 2007 by so_tred

[Nismo_God]

Hi all. Is there anyone from sydney who has done this mod that wouldnt mind helpingme out. i live in the liverpool area and dont feel confident enough to start cutting wires. let me know.....there will be an ice cold six pack in it.

[dezz]

Question:When I put on a full turbo back 3 inch exhaust this will be rendered unnecessary, correct?

No. The only time it will be unnecessary is when you have some form of boost controller that will be bypassing the stock solenoid.

[DRD-00F]

Hi all. Is there anyone from sydney who has done this mod that wouldnt mind helpingme out. i live in the liverpool area and dont feel confident enough to start cutting wires. let me know.....there will be an ice cold six pack in it.

drive to Turramurra and ill do it for you

Im outta switches though...

[MotoMan]

Hi all. Is there anyone from sydney who has done this mod that wouldnt mind helpingme out. i live in the liverpool area and dont feel confident enough to start cutting wires. let me know.....there will be an ice cold six pack in it.

Seriously man... its the most simple job ever...

I just shoved a cotter pin down the back of the plug.. and grounded it to the airbox.. I can remove the mod within seconds and no cutting wires at all

[so_tred]

No. The only time it will be unnecessary is when you have some form of boost controller that will be bypassing the stock solenoid.

I thought if the boost solenoid was left standard and I added a full exhaust which usually will up the boost by 2psi then the solenoid would be made obsolete?

[dezz]

no, instead of being 5psi/7psi (on an R33, not sure if its the same boost on R34's?) it will then be 7psi/9psi

[so_tred]

no, instead of being 5psi/7psi (on an R33, not sure if its the same boost on R34's?) it will then be 7psi/9psi

I hoped it would be like that

So it's been tried & proven to be that way?

[dezz]

Mine was that way....

[Kennedy]

I hoped it would be like that

So it's been tried & proven to be that way?

Yep. Mine ran 9.5 psi without using an aftermarket boost controller

[GtsTs2UK]

I took this off as it made my gtst end up funny, know it runs better without...

It should still be mapped to use this mod really.

[MotoMan]

As far as im aware.. my exhaust is only catback.. However im running around 9.5 PSI... Blitz Turbo timer tell me 0.71 kg/cm2 (which equals 9.5psi) and just installed a boost gauge.. it also reads just under 10 psi

Is that possible with only catback?

Before the mod it was 7/9psi

[Kennedy]

you sure your cat isnt gutted?

[MotoMan]

you sure your cat isnt gutted?

No idea to be honest.. its looking old... and crappy..

Ill be getting a Justjap Split dump and highflow cat soonish though

[adamR33]

hey i did this on my 33gtst and its poping and crap well by the way its a S1 4 speed auto , 600x300x75 intercooler and a 3.5inch stainless from cat back and i did this thing by cut the black wire and the black wire onto the car body and the black wire from the computer taped to block it . now took it up the street and it will get to 5 psi then it will just back fire and pop and jump or what ever eles .. then i put it all back to normal then it was fine . i wanted to do this thing , but can anyone tell me how to solve this problem . or anyone from lismore or ballina . cheers, adam

[Kinks]

^^ if it's misfiring on the higher boost setting I'd say you need to change your plugs, gap them down a bit, or get new coil packs.

[Demoniak]

Did it last week on my R33.

Works a treat.. much better pickup.. and took me bugger all.

No backfiring etc.just extra oomph

+1 for reccomending