Jump to content
SAU Community

Recommended Posts

what else could it be if there is instant smoke after the turbo blows, and then u find bits of ceramic turbo wheel in your sump/oil filter?

also remember its not large chunks, its tiny pieces like sand that get stuck in.. the large chunks would be blown out....

  • Replies 49
  • Created
  • Last Reply

Top Posters In This Topic

Guys - I'm still hell skeptical

Unless I see hard evidence of ceramic bits in the engine bores I can't possibly see how parts can travel back against the pressure in the exhaust manifold, then through the head ports and finally back down into the bores when the valves are opening.  

Just think about it for a moment - what sort of velocity is the gas travelling OUT of the exhaust ports at - friggin' heaps!

I'm not doubting that when you open the engine up that there is bore damage - I'm just hell skeptical that it is caused by ceramic exhaust wheel parts.

gav ,

there is a deal for you . you boost your stock ceramic gtr turbos and when they let go ( thats right when not if ) if they dont damage your engine i'll buy you a new set and even install them for you but if they stuff your engine then you buy me a set of 2530's .

My mechanic (which I trust) says there is a risk of a blown ceramic turbo doing harm to your engine otherwise I would be purposely running at 1.2bar trying to kill the mothers!

Rebuilding stock turbos costs around $800/turbo. Removing and installing turbos on an R32 GT-R is no easy job and could cost anywhere from $650-850 depending on who does it for you.  

A GT-R on boost is an awesome thing though huh? I am looking into a set of N1 turbos. Small, keep the response down low and able to handle over 1bar of boost comfortably. Sounds perfect to me! (cheers to SydneyKid for all the knowledge).

i have a set of r33 n1's in my gtr and i find them very good , i run 1.2 bar boost and they will hold more boost all the way to 8000 , they boost a little later that the stock ceramic turbos , power comes on hard from 4000 rpm ( 1 bar ) and full boost at 4500 in third gear . the only mods are power f/c ,ebc i/cooler piping and full exhaust . i did run 11.7 @120 mph with 1.85 60 ft .

2530's are better because they are ball bearing and when i get my r34 thats what i'm going to use unless i find cheap n1's .

My mechanic (which I trust) says there is a risk of a blown ceramic turbo doing harm to your engine otherwise I would be purposely running at 1.2bar trying to kill the mothers!

Rebuilding stock turbos costs around $800/turbo. Removing and installing turbos on an R32 GT-R is no easy job and could cost anywhere from $650-850 depending on who does it for you.  

A GT-R on boost is an awesome thing though huh? I am looking into a set of N1 turbos. Small, keep the response down low and able to handle over 1bar of boost comfortably. Sounds perfect to me! (cheers to SydneyKid for all the knowledge).

i have a set of r33 n1's in my gtr and i find them very good , i run 1.2 bar boost and they will hold more boost all the way to 8000 , they boost a little later that the stock ceramic turbos , power comes on hard from 4000 rpm ( 1 bar ) and full boost at 4500 in third gear . the only mods are power f/c ,ebc i/cooler piping and full exhaust . i did run 11.7 @120 mph with 1.85 60 ft .

2530's are better because they are ball bearing and when i get my r34 thats what i'm going to use unless i find cheap n1's .

how is the oil catch can going justin , i still want it whenever you get it back .

wow!

i always believed there wasn't too much chance of engine damage with a turbo "letting go".....! i had the gtst turbo running at 18psi for a few runs

before i replaced it, since i didnt care if it broke (which it didnt)

i have been looking at 89 gtr's i think ill steer clear now, since most of them would of run around one bar with exhaust mods and boost mods at same stage

i dont think the the gtst turbo will damage your engine when it lets go but not 100% on that . reason is the exhaust valves open close cycle is different to gtr .

gtst duration is 54 degrees gtr is 56 deg .

Hey guys, thanx again for all ur help......Got the checks done, and everything seems to be fine....The comps a lil lower on the front three than the back three....by bout 15psi...I hear dis is ok???

They shouldn't be more than about 10% out on a compression test. Are these results for compression or leak down, and what were the numbers for each cylinder?

LW.

Hey guys, thanx again for all ur help......Got the checks done, and everything seems to be fine....The comps a lil lower on the front three than the back three....by bout 15psi...I hear dis is ok???

They shouldn't be more than about 10% out on a compression test. Are these results for compression or leak down, and what were the numbers for each cylinder?

LW.

15 psi down on all front 3 ? thats a bit sus , did the front turbo let go ? usualy the rear goes . if the front turbo let go and compression is down on the front 3 i'll a little worried .

as lwells said it should be less than 10 % variance but i wouldnt want that they should be fairly close like 5 psi difference or less .

anyway standard comp is 1.18 mpa ( 12kg/cm ) or about 170psi and variance limit is .1 mpa or about 14 psi .

a leakdown test will give you a better indication of the cil bore condition .

Im not too sure which turbo went.... will find out. I bouight the car though and it runs smooth as!!! Just a lil worried about the clutch. I use to own a jap spec Vr4(early evo) and had way too much fun launchin that, it was 4 wheel drive. I cant afford to in dis right now, cuz im afraid the clutch will burn out sooner than id like. I be looking out for a twinny i a couple monts....

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

    • OK, Step 3, if you need to remove the valve body, either to replace it, the TCM, or to do a more complete drain.  First, you need to disconnect the TCM input wires, they are about half way up the transmission on the drivers side. One plug and the wires are out of the way, but there is also a spring clip that stops the socket from sliding back into the transmission. On my car the spring clip was easy to get, but the socket was really stuck in the o-ring of the transmission housing and took some.....persuasion. You can see both the plug to remove (first) and the spring clip (second) in this pic Incidentally, right next to the plug, you can see where the casting has allowance for a dispstick/filler which Nissan decided not to provide. there is a cap held on with a 6mm head bolt that you can remove to overfill it (AMS recommend a 1.5l overfill). Final step before the big mess, remove the speed sensor that is clipped to the valve body at the rear of the box.  Then removal of the Valve Body. For this the USDM Q50 workshop manual has a critical diagram: There are a billion bolts visible. Almost all of them do not need to be removed, just the 14 shown on the diagram. Even so, I both removed one extra, and didn't check which length bolt came from which location (more on that later....). Again it is worth undoing the 4 corners first, but leaving them a couple of turns in to hold the unit up....gravity is not your friend here and trans oil will be going everywhere. Once the corners are loose but still in remove all the other 10 bolts, then hold the valve body up with 1 hand while removing the final 4. Then, everything just comes free easily, or like in my case you start swearing because that plug is stuck in the casing. Done, the valve body and TCM are out
    • OK, so if you are either going for the bigger fluid change or are changing the valve body which includes the Transmission Control Module (TCM), first you should have both a new gasket 31397-1XJ0A and a torque wrench that can work down to 8Nm (very low, probably a 1/4 drive one). You can probably get by without either, but I really didn't want to pull it all apart together due to a leak. First, you now need that big oil pan. The transmission pan is 450 long x 350 wide, and it will probably leak on all sides, so get ready for a mess. There are 24x 6mm headed bolts holding the pan on. I undid the 2 rear corners, then screwed those bolts back in a couple of turns to let the pan go low at that end, then removed all the middle bolts on each side. Then, undo the front corner bolts slowly while holding the pan up, and 80% of the fluid will head out the rear. From there, remove the remaining bolts and the pan is off. You can see it is still dripping oil absolutely everywhere...it dripped all night.... I got another couple of litres when I removed the pan, and then another few when I removed the valve body - all up another 4l on top of the 3 already dropped in step 1.
    • Yeh I think i'll message an old contact i had for ages that manages his own tyre shop now.. n tell him what i want n work with him before ordering..  Got this 17x9 +30 Driftteks on 245/45/17 PSR Drag Radials on the rear.. They fit well - for your reference in future - Rear guards  have been lipped in & minimal to non flaring of the rear Gaurds.    
    • If only it were that easy! I also needed to remove seats, shocks, brake calipers, send my car through a fence, and use measuring and ended up guessing because I didn't remove seats, shocks and brake calipers. It can be hard sometimes Can be a little more complex than 'just measure' if you want to truly measure the entire wheel through all of it's suspension travel. But if you aren't going for every last mm then yeah, you can check the space you currently have and guesstimate.
    • If you own a car, and it has wheels on it, and you know the offset of those wheels, and you have a measuring device, you have everything you need to work out if other wheels will fit.
×
×
  • Create New...