Jump to content
SAU Community

Recommended Posts

Hi all! As topic reads I am an owner of a 95' Skyline R33 Gtst. Bought it 'bout a year ago, was and still is fairly stock. mods so far is:
* 3' turboback exaust
* Greddy profec b boost controller
* apexi filter
post-140800-0-84010000-1437921421_thumb.jpg
Also changed the coilpacks and plugs not too long ago.

So anyway to my problem. Always since i bought the car it has had the famous flutter sound (off throttle) which bothered me some, and the old owner had the Ebc set at 1bar
(14.5 psi) in high mode which I know is to much for the stock turbo to handle.
Experienced what I Belive was R&R at a point when the Ebc was set to only 0.75bar. (11 psi)
Been driving with the Ebc controller off for some time now, no more retarded timing. So with the controller switched off I get 0.64-0.67 bar.
(9.5 psi)

I decided to inspect the BOV to see if I could find the cause of the flutter, suspected it would be blocked, I was right. There was a metal plate in the shape of the gasket in between with some red goo around. Removed it and replaced with a new gasket and went for a drive, now the BOV opens and air gets released, though I could hear a high pitch whistle sound around 2500 rpm with 1/3 throttle applied. Boost still went to 0.64 bar.

Now more recently though the car feels really slow when I go full throttle it's holding back, like I was towing somebody kind of that feel. It dosen't missfire or anything just dosen't have that punchy acceleration anymore, but when cruising on the motorway
and I give it some gas in higher gears it pulls fairly good but boost only goes strong up to 0.44-0.46 bar. I can push it so it reaches 0.52 but thats not until 6000+rpm!

Can it be a boost leak? or clutch maybye?

Any advice would be much appreciated!

Cheers!

Edited by KLA33E
Link to comment
https://www.sau.com.au/forums/topic/458500-r33-feels-very-slow-lately/
Share on other sites

Good thing you removed that metal plate blocking your BOV. For your issue, it could be your boost solenoid not opening (you have EBC), BOV leaking, leaking somewhere. Or maybe you were used to having your car with higher boost, and now it is in a normal range.

Did u set the plug gap to 0.8???, at 14 psi the spark would be struggling at bigger gaps. But prob not so much at 10psi.

Also wondering if your BOV is partially stuck open?

Hello! Yes the plug gap is actually 0.7mm, they regap them from factory (also checked this). As for the BOV I think that might be the case actually. Sometimes I think I can hear it bleed off when still on throttle.

I have Ordered a new Turbosmart Plumb back BOV. (BPV) to see if it will help.

Btw i've heard that the original Nissan one does bleed off a little at throttle to recive a more linear powerband. Do you know if thats true?

Edited by KLA33E

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

    • Yeah well per the video it took 15s for the stock unit to start up....even if I give it a few seconds discount for starting that is at least 12 sec before you get a reverse camera if you are trying to leave a park.  The android unit is way faster, but 2016 for the stock unit is a long time ago in consumer electronics
    • Yea that’s why I said ima test them with multimeter and see the reads.
    • Only at idle. Isn’t a problem when rev it seems.
    • @Haggerty This seems silly to ask, but are you confident in your ability to tune the Haltech?  
    • Next on the to-do list was an oil and filter change. Nothing exciting to add here except the oil filter is in a really stupid place (facing the engine mount/subframe/steering rack). GReddy do a relocation kit which puts it towards the gearbox, I would have preferred towards the front but there's obviously a lot more stuff there. Something I'll have to look at for the next service perhaps. First time using Valvoline oil, although I can't see it being any different to most other brands Nice... The oil filter location... At least the subframe wont rust any time soon I picked up a genuine fuel filter, this is part of the fuel pump assembly inside the fuel tank. Access can be found underneath the rear seat, you'll see this triangular cover Remove the 3x plastic 10mm nuts and lift the cover up, pushing the rubber grommet through The yellow fuel line clips push out in opposite directions, remove these completely. The two moulded fuel lines can now pull upwards to disconnect, along with the wire electrical plug. There's 8x 8mm bolts that secure the black retaining ring. The fuel pump assembly is now ready to lift out. Be mindful of the fuel hose on the side, the hose clamp on mine was catching the hose preventing it from lifting up The fuel pump/filter has an upper and lower section held on by 4 pressure clips. These did take a little bit of force, it sounded like the plastic tabs were going to break but they didn't (don't worry!) The lower section helps mount the fuel pump, there's a circular rubber gasket/grommet/seal thing on the bottom where the sock is. Undo the hose clip on the short fuel hose on the side to disconnect it from the 3 way distribution pipe to be able to lift the upper half away. Don't forget to unplug the fuel pump too! There's a few rubber O rings that will need transferring to the new filter housing, I show these in the video at the bottom of this write up. Reassembly is the reverse Here's a photo of the new filter installed, you'll be able to see where the tabs are more clearing against the yellow OEM plastic Once the assembly is re-installed, I turned the engine over a few times to help build up fuel pressure. I did panic when the car stopped turning over but I could hear the fuel pump making a noise. It eventually started and has been fine since. Found my 'lucky' coin underneath the rear seat too The Youtube video can be seen here: https://www.youtube.com/watch?v=uLJ65pmQt44&t=6s
×
×
  • Create New...