Jump to content
SAU Community

Recommended Posts

Modded my boost solenoid, So just a quick post with some 0-100 times on my stock S1 RS4. All recorded on a g-tech at night (canberra = cold)

Before mod (stock boost cut until 4500 rpm)

Run 1: 8.28

Run 2: 8.37

Run 3: 8.19

After mod (full boost throughout range)

Run 1: 7.31

Run 2: 7.38

Run 3: 7.29

worth your time!

Cheers!

Link to comment
https://www.sau.com.au/forums/topic/172290-boost-solenoid-mod-0-100-times/
Share on other sites

has anyone gone to the effort to extend ( what I beleive ) is an easy mod one step further?

would be good if you could get a 2 way switch to allow you to go between the 2?

Ie .. stock setup - low boost till 4000rpm

then full boost from 0 - redline

could be a good thing to do

not worth the effort, leave it at full boost, and control it with your foot. :wub:

Just the standard ground the solenoid so it's open all the time (or just bypass it..) but as far as having a switch for it.. I don't see a lot of point, as it's much more responsive with it fixed, and uses a reasonable amount of less fuel. More midrange = less right foot.

But was good to see a difference in numbers, not just feel. It was mainly off the line where it made the difference. Up to 50 kph or so was HALF the time. I also tried one run with loading up the stall but the brakes couldn't hold it under full throttle.

fun stuff anyway :) I would have done some 0-400m but not a lot of ACT roads where doing 150kph recommended..

:)

I don't suppose you could follow this up with some numbers on your fuel economy?

Anywhoo, thanks for sharing the lurve :)

When I did the mod I went from about 390k a tank to 450k a tank, but it's all really down to driving style I guess.. I'm pretty easy on the car, doesn't spend much time above 3500rpm, but doesn't have to now.. before you really had to wring the neck out of it for any sort of performance, so effortless now. Different car! Even feels better down low than my TT 300zx which is 3L and has 2 turbos (manual)

The mod is just in the sticky section under DIY.. I think it's called full boost modification or similar.. 5 mins work..

its called rb25 boost solenoid mod i think.

essentially you ground the solenoid, so its always open (the ecu opens it at 4,500rpm, so you have 5psi boost to 4500rpm, then 7 over that)

you can either ground the solenoid, or just rip the thing out and join the 2 hoses (make sure you dont use a joiner that will restrict the hose I.D. otherwise you might get too much boost, ideally use a single piece)

very good, cheap mod to perform on the rb25. :)

its called rb25 boost solenoid mod i think.

essentially you ground the solenoid, so its always open (the ecu opens it at 4,500rpm, so you have 5psi boost to 4500rpm, then 7 over that)

you can either ground the solenoid, or just rip the thing out and join the 2 hoses (make sure you dont use a joiner that will restrict the hose I.D. otherwise you might get too much boost, ideally use a single piece)

very good, cheap mod to perform on the rb25. :worship:

why not buy a manual b/c and try ten psi, even better :)

mate not a chance in the world anyone would ever notice even if it was illegal...you cut one wire and ground it to the chasis.

the beauty of this mod is it gives you power in the midrange, doesnt affect top end (and therefore should be super safe for the motor). And cost is about 10c...5cm of wire and a eye terminal

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Welcome to Skyline ownership. Yes, it is entirely possible parts websites get things wrong. There's a whole world of inaccuracies out there when it comes to R34 stuff (and probably 33 and 32). Lots of things that are 'just bolt on, entirely interchangable' aren't. Even between S1 and S2 R34's. Yes they have a GTT item supposedly being 296mm. This is incorrect. I would call whoever you got them from and return them and let them know the GTT actually uses 310mm rotors. Depending on where you got them from your experience and success will obviously vary.
    • Hi...a bit a "development" on the brakes. I spoke to the guys where i get brakes from...and they are saying that 296mm EBC are for R34 GT-T. I then went to their site: https://www.ebcbrakes.com/vehicle/uk-row/NISSAN/Skyline (R34)/ and search for my car(R34 GT 1998 - it has GTT brakes) and it show me this USR1229 number and they are rly 296mm rotors... So now iam rly confused... The rotors i have now on the car are 310mm asi shown... So where is the problem? Does the whole EBC got it wrong or my calipers are just...idk know what?  
    • Oh What the hell, I used to get a "are you sure you want to reply, this thread is XX months old" message. Maybe a software update remove that. My bad.
    • This is a recipe for disaster* Note: Disaster is relative. The thing that often gets lost in threads like this is what is considered acceptable poke and compromise between what one person considers 'good' looks and what someone else does. The quoted specs would sit absurdly outside the guards with the spacers mentioned and need  REALLY thin tyres and a LOT of camber AND rolling the guards to fit. Some people love this. Some people consider this a ruined car. One thing is for certain though, rolling the guards is pretty much mandatory for any 'good' fitment (of either variety). It is often the difference between any fitment remotely close to the guards. "Not to mention the rears were like a mm from hitting the coilovers." I have a question though - This spec is VERY close to what I was planning to buy relative to the inboard suspension - I have an offset measuring tool on the way to confirm it. When you say "like a mm" do you mean literally 1mm? Or 2mm? Cause that's enough clearance for me in the rear :p I actually found the more limiting factor ISNT the coilover but the actual suspension arms. Did you take a look at how close those were?
    • @GTSBoy yeah sorry i know thery are known for colors bud those DBA are too in colors 🙂 Green will be good enough for me  
×
×
  • Create New...