Jump to content
SAU Community

Recommended Posts

Hi all,

Went for quick drive this morning, I noticed it's overboosting now (usually read 0.6 kg/cm boost on Nismo Combination meter), it is overboosting to 0.65 kg/cm roughly cos I backed off the second i see the needle went over 0.6.

So my question, would leaking exhaust manifold gasket cause overboosting?

Cheers

Grant

unlikely. The noise is normally more noticable when its cold due to expansion when it gets hot.

As for broken studs, its unlikely on a GTR. GTSt's do it as the manifold is one piece and they warp causing the studs to snap. Given GTR's have 2 manifolds its a lot less common. BUT, the studs on GTR turbo's do loosen themselves off and cause the turbo to come loose on the manifold. If one is loose you will be able to move it around with a little help from a prybar. But obviosuly be careful what you lever off.

We had this problem a while ago at work and i cant for the life of me remember what caused it.....

About these, should I worry too much or?

Will have a look @ exhaust area later and check.

If all else fails, off to mechanic I go.

edit: Just had a look at engine bay for manifold bolts, can't see any cos the heat shields are covering whole area.

I'm still baffled at this problem... And I've run out of things to look out for.

unlikely. The noise is normally more noticable when its cold due to expansion when it gets hot.

As for broken studs, its unlikely on a GTR. GTSt's do it as the manifold is one piece and they warp causing the studs to snap. Given GTR's have 2 manifolds its a lot less common. BUT, the studs on GTR turbo's do loosen themselves off and cause the turbo to come loose on the manifold. If one is loose you will be able to move it around with a little help from a prybar. But obviosuly be careful what you lever off.

We had this problem a while ago at work and i cant for the life of me remember what caused it.....

Damnit, i remembered the 2 manifolds today...lol...but you corrected me b4 i had a chance to redeem myself... :bunny:

Hi all,

I just got home from Status today, Trent (who is a champ once again!) couldn't determine if I've blown a turbo wheel or not cos I don't have a cataylic converter to catch the shredding metal though.

Last night, I popped in, Trent went through the cramped engine bay, disconnecting one wastegate and see if it's over boosting or not. Rear turbo did but front didn't.

Trent listened to whole engine bay, plugged consult port to read AFM voltage, it appears all is dandy except for a whining sound from the turbos.

In conculson, Trent thinks front turbo may be broken, so I won't be driving this money pit for a while until I source replacment turbo (hopefully 34 N1), so will be buying new gaskets, studs and 100,000km service kit at same as turbo replacment.

Lastly, I'd like to say thanks to all whoever helped me in this thread, also many thanks to Trent @ Status for squeezing me in on his busy schedule.

Now, I'm going to put my wallet on diet!

Cheers

Grant

In conculson, Trent thinks front turbo may be broken, so I won't be driving this money pit for a while until I source replacment turbo (hopefully 34 N1), so will be buying new gaskets, studs and 100,000km service kit at same as turbo replacment.

http://www.skylinesaustralia.com/forums/R3...je-t323388.html

Brett,

Seen these, I am in negotiation with a pair of N1s from QLD at the moment.

Thanks for the link anyway, will keep these in mind if it falls through.

Cheers

Grant

Hi all,

Bit of a update, I decided to start it today.

On the start up, I noticed it is bit too loud (or I haven't started it since last Tuesday and forgotten what it sounds like?), on idle, it reads at 1,300rpm. After few minutes, I noticed white smoke coming out of the exhaust I turned the car off straightway idle speed went down to 1,100rpm.

So, white smoke coming out from exhaust means the turbo is shot?

Cheers

Grant

wanna swap, i have a nice simple gtst, i'll even throw in the 3540 set up that i cbf putting on atm :(

I think between what happened and trents thoughts i think its time for a new turbo, personaly i think that the lack of oil smoke at start up is because oil is thicker when cold, after warming up it would flow more freely throw worn bearings and seals.

Edited by W0rp3D
wanna swap, i have a nice simple gtst, i'll even throw in the 3540 set up that i cbf putting on atm :(

I think between what happened and trents thoughts i think its time for a new turbo, personaly i think that the lack of oil smoke at start up is because oil is thicker when cold, after warming up it would flow more freely throw worn bearings and seals.

Hmm... That does make sense.

I have pair of N1 on way to me and still hunting for PFC. Also buy new gaskets + studs and 100k service kit while I'm at it.

Anyone have PFC (would be nice to have HC) want to sell it to me?

And thanks to whoever posted on this topic.

Cheers

Grant

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

    • The German place in Cabramatta was rock solid, fresh pretzel cooked to order back then. Then it went all quiet, after all the poker machines were removed, then I believe it closed for good. I did drive past the other week and noticed outdoor lighting a big screen, but no idea what is there now.  
    • Yeah I suspect even if you hold airmass per cycle/cylinder constant if you get too far away from stock you're still going to have problems running the factory tune within the bounds of the factory load scale. Cams, different displacement/rod ratio, etc. I'm just lucky that the GTIII-SS with wastegate boost + CA compliance cats is pretty much equivalent to stock turbos. When I have actual space I can finally get it tuned and modify the fuel system for flex fuel to 100% handle any detonation concerns when cranking the boost to whatever those dinky turbos can put out.
    • I would say no, why, because my daughter, who also lives in Goulburn, hasn't recommended us going there Pity, as we miss all the German joints around in Sydney, actually, the restaurants are the only thing I really miss about Sydney, and a special mention to Ishibanboshi at Bondi Junction, their Kara-age Don is heart cloggingly deliciousness (always added a special boiled egg...or 2) 😋 
    • Does that German restaurant still exist in the old place out the NW end of Goulburn? When I say "out the NW end of"...I am really being vague. It was 1997 when I was last there, and the only point of reference I can recall is that it was on the opposite side of the main drag from the big merino. And when I say "opposite side of the main drag", I don't mean "on the main drag". It was either a couple of streets back from there, or might have even been out in the sticks a bit further. Was an old farm building or mill or somesuch. And when I say "the big merino" I might actually be thinking of a completely different part of town, because I just looked on maps and the big bugger is not where I remembered him to be! The food was good, consisting largely of various German mystery-meat sausage/loaf things and kartofflen.
    • So while the second sentence is completely correct and the whole point of the conversation, the first sentence bears consideration. If this bloke is just hoping to throw big turbos on and drive it around, because there are no helpful facilities at all in his tropical paradise** then he likely has zero chance of even knowing what the TP is on the last column in the stock maps, let alone know whether the ECU is operating anywhere near it or past it. So the point is very very moot. And, per what I said before, at stock boost on those turbos, you may well be off the end of the map. **I'm just back from Vanuatu, so I know exactly what small Pacific nations can be like wrt paradise without requisite facilities. But it's not even that simple. I put a high flow on my car and had to drive it around without a proper tune because of the lack of opportunity*** to put the bigger AFM and injectors into it to allow it to be tuned. I had to turn the boost down to less than I had before, and back off the boost controller's ramp, because it was exploring parts of the map that it didn't drive in before, and really couldn't access for tuning on the dyno either, and so was pinging. It was still well within the last column, because when I first**** set up the Nistune on the Neo I rescaled all axes of the maps to give some more space to explore. ***Family dyno was broken ****This was 13 years ago, and the TIM thing wasn't a thing then and so TP would definitely grow when pushing past the stock tune's limits.
×
×
  • Create New...