Jump to content
SAU Community

Recommended Posts

Yeah I did at one point because a "mechanic" thought it was a bleed valve, but I've popped the ball out of the bottom before I took the play out of the spring and put it back in. I still can't get it to run low boost. :D

How many psi is the actuator rated at?

Try taking the boost controller out and run the line straight to the actuator. Maybe your actuator isn't opening the wastegate thus the boost keeps rising.

  • Replies 1.8k
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

How many psi is the actuator rated at?

Try taking the boost controller out and run the line straight to the actuator. Maybe your actuator isn't opening the wastegate thus the boost keeps rising.

I don't have a clue hey.

That will just be the same as before I put it in??? I'll do it if you think I should I was thinking about taking it out anyway, but what else would I do?

Edited by 90GT4

Did you disable/remove the stock boost controller?

You have to remove your stock boost controller and use the turbotech in it's place. It's not a good idea to have 2 different boost controllers trying to control boost.

Either way you won't be able to run a lower boost than what your actuator is set too. So if your actuator is 10psi, then 10psi is the lowest boost you'll be able to run.

Try and keep things simple. Take the turbotech out of the equation. Hook up the boost signal hose straight too the actuator and see what boost it runs.

Then hook up the turbotech and see if you can adjust boost/see what boost it hits.

If one of these has a problem it'll show in this test.

Too hook it up the turbotech it should be:

Hose from intercooler piping -> Bottom nipple on Turbotech (this nipple is inline with the bolt) -> Hose from other nipple to actuator.

Did you disable/remove the stock boost controller?

You have to remove your stock boost controller and use the turbotech in it's place. It's not a good idea to have 2 different boost controllers trying to control boost.

Either way you won't be able to run a lower boost than what your actuator is set too. So if your actuator is 10psi, then 10psi is the lowest boost you'll be able to run.

Try and keep things simple. Take the turbotech out of the equation. Hook up the boost signal hose straight too the actuator and see what boost it runs.

Then hook up the turbotech and see if you can adjust boost/see what boost it hits.

If one of these has a problem it'll show in this test.

Too hook it up the turbotech it should be:

Hose from intercooler piping -> Bottom nipple on Turbotech (this nipple is inline with the bolt) -> Hose from other nipple to actuator.

No I havn't my mechanic didn't say anything about it. But it is in exactly as you mentioned at the bottom.

I only want to run 10/12 if possible for now.

The problem is that I can't even get it below 14/16 where the FCD cuts in, I already know it runs 10pound.

post-41815-1188541092_thumb.jpg

If I was cutting the actuator out of the equation would that mean connecting the arrow hose onto the nipple over the very right? Cause I think that thing has a 3rd nipple.

OT. Is the stock boost controller the actuator? Confused...

Edited by 90GT4

That drawing is pretty whacky man. I don't understand what that thing is you've boxed.

You can't take the actuator out of the equation. It's what ultimately controls the boost. It opens the wastegate.

What's the stock boost for a GT4?

Maybe if its like a WRX it runs a high boost from factory. WRX's run about 13.5-14psi standard.

GRT-WGT-008_450.jpg

That thing above is an actuator.

Some cars use only the actuator to control boost. Some use a secondary 'boost controller' to control/raise boost.

The skyline for instance uses a dual stage boost controller from factory. the Actuator is rated at 5psi, but the boost controller when it kicks in bleeds off 2psi to make a total of 7psi.

I've taken it out now :rofl: It runs about 10psi, but I have a fuel leak now and need to find it on Monday, sounds like I need to find the standard boost controller if there is one :)

Hey Guys,

Sorry if these are questions that have already been covered in detail, but i've done a few searches and would just really like to be sure of a few things before i kill my turbo!

I'm using the stock boost guage for the 33gts-t, and i've searched the forum regarding the readings on it, but i was wondering if you could tell me approximately what PSI i'm boosting at if the indicator is hovering about halfway between the middle marking and 0 on the +7 side to save me guesstimating it?

Also, I'm rather worried about recieving an inaccurate reading from the stock guage based on all your advice and i'll be replacing it soon, but i don't want to kill my turbo before that! Is there a chance that i could be running well over what the reading is? Or is it fairly reliable and accurate to the 14 or so PSI that it can display?

I guess the second question is- is it safe for me to be running that PSI on the stock series 2 turbo? How much will it be shortening the lifespan of the turbo by?

I'm running a completely stock engine with stock intercooler- and after driving from my place to the city (around an hour), i've noticed the outside panels of the car around the front left wheel well were pretty darn hot. Is this normal?

Cheers guys! I appreciate your help!

Sorry again if these have all been answered!

The stock boost gauge is rated in torr (or millimeters of mercury (100xmmHG)), 1 bar is roughly 700-760 mmHG, which is about 14 PSI. Halfway up the positive side of the gauge is about 7 PSI.

With the stock solenoid, it should read just under the bar between when the turbo spools up and 4500RPM, then just either dead on or just over the line the rest of the way.

I've found my gauge to be rather accurate once settled, but it isn't lightning fast to respond to spikes, I've been pretty good at telling when it spikes based on the speed of the movement to the next position.

My car is a pretty stock S2 R33 and I have been messing about with it for a while now. Unless your turbo is in a really shit condition or some idiot has installed a fuel cut defender I wouldn't worry about playing around with it too much.

You'll get a nasty jerk if it spikes into ~12 PSI as you'll hit a safety cut, just ease off the throttle and adjust the controller down. When testing your pressure, always check that you arn't hitting the safety cut in 4th or 5th gear as well. While I was playing about with it I had a setting where it would be perfect in 1st, 2nd and 3rd, but under more open throttles in 4th and 5th it would edge on cutting out.

If your gauge is accurate, you want about 10 PSI which is about halfway again between the +7 mark and half positive.

Edited by Hell Fire
Just wondering if the guy who makes these boost controllers in on these forums? I cant buy one as my ebay account is suspended.

His name is Mark, his e-mail is [email protected] , he should be able to help you out out-side of eBay :cheers:

  • 2 weeks later...

lol..

ive got 2 here. i use nothing but them. on all the sils and skyrines.. i use this.. use it on the GTR the GTT the S14 the 180 the RB20 sil.. very reliable and mark is a good mate.. he will deffently look after u.

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

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...