Jump to content
SAU Community

Recommended Posts

Engine was built by a shop down bris, usual rb30, 25de head, spool rods, mahle pistons

its dont about 3-4000km's and she's spun a bigend.. going by the colour of the rods were thinking oil starvation? whats everyones thoughts...

tune was 360rwhp on 13psi with a t04z, engine was run in on the dyno and had been running sweet

post-78330-0-68390500-1301381319_thumb.jpg

post-78330-0-83683800-1301381429_thumb.jpg

post-78330-0-83335100-1301381474_thumb.jpg

Edited by 32rrr
Link to comment
https://www.sau.com.au/forums/topic/359111-rb30-failure/
Share on other sites

pull the girdle off and lay the main bearings out in order and see what they look like.

ps. all the plugs are still in the crank? especialy adjacent to the damaged bearing..

Will be doing that tomorrow and checking everyones still where it should be

i just cant believe how much colour difference there is in the rods

Edited by 32rrr
Link to comment
https://www.sau.com.au/forums/topic/359111-rb30-failure/#findComment-5735896
Share on other sites

I built this engine. About 2.5 years ago.

N1 pump was used at customer's request. I suggested using a Tomei as we were building two other Tomei pump engines at the time and you can't really go past them for quality/reliability

The N1 pump was brand new. Collar was new and fitted by an engineer. We always check clearance on collars when we fit them.

It had a ROSS balancer too so not a harmonic issue I don't think.

Such a shame, that engine was destined to make some bigger numbers.

Although I can't prove any problem with the N1 pumps, we just stay clear of them now due to the pump failures we have seen.

Link to comment
https://www.sau.com.au/forums/topic/359111-rb30-failure/#findComment-5738378
Share on other sites

What was the rev limit on this engine and was the limiter regularly hammered? I am interested (worried) because an N1 pump has gone into my RB30 (yet to run). One reputable RB30 builder here won't touch N1 pumps because of a number of failures but others say that they are ok with a rev limit such as i am planning to use: 6,800rpm. Or is the "safe" limit lower on an RB30?? Engine above does not appear to have been highly stressed - planning to run 18 - 20 psi with a GT3540 and looking for around 300awkw.

Link to comment
https://www.sau.com.au/forums/topic/359111-rb30-failure/#findComment-5738918
Share on other sites

Reved to 7, limiter set at 7250, hardly hit the limiter.

To anyone with a N1 pump on any engine.. i seriously suggest changing it as the pressure gear just isnt thick enough in the area's where it needs to be.. i will use a stock rb30E pump before i use an N1 pump again

Car was run in on the dyno, was going strong untill she went bang, the oil pump is quite spectacular

Crank and 2 of the rods are throw aways, pistons will be reused just have to decide what to do, but for now a bog stock rb30e bottomend has gone in just to get the car mobil again.

post-78330-0-62906000-1301571243_thumb.jpg

when i can see the funnier side to it.. i'll throw up pics around the place, i really have to give it to the spool rods considering the heat damage that they have copped i honestly dont know how they didnt bend and leave the block

Link to comment
https://www.sau.com.au/forums/topic/359111-rb30-failure/#findComment-5739959
Share on other sites

I purchased a second hand N1 pump from someone on this forum (he took it out of his car because he was paranoid) and been using it ever since, the pump is 4 years old now and ive been using it in my RB30 for 3 years, its been to 2 different countries and traveled a LOAD of km's with revs up to around 7300 with stock balancer when racing. It has withstanded temps of -10deg where you HAVE to use anti freeze and also hot weather also.

I use a very soft rev limiter with the vipec and stock balancer but i ALLWAYS use the best oil... Motul.

Only different thing i did before installing it was lock tight the screws on the back.

N1 all the way IMO even after 100,000 km (road) its still going strong! just ran a 10 last month.

The N1 pump has served me great.

Link to comment
https://www.sau.com.au/forums/topic/359111-rb30-failure/#findComment-5740613
Share on other sites

Correct me if i am wrong but I THINK that when the gears gave way and siezed the engine must have had some torque behind it and kept spinning inside the pump and just shredded them away...

You can see there was a f load of heat inside there at one point :)

nice main bolts btw

Where the hell did the two flats go?

Link to comment
https://www.sau.com.au/forums/topic/359111-rb30-failure/#findComment-5740649
Share on other sites

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

    • I started with the above in my head too, and I might be reading / thinking about what they want wrong, which is why I complicated it a bit further. Purpose I'm seeing is for the corner indicator to be on with headlights, and then if the indicator turns on it can still flash. The relay part above I can see working as required, except in the case of headlight is on, and indicator is on. The change over relay you've wired in would get signal from the indicator, and as it flashes would give power to the globe from the indicator, but as it flashes off, power comes from the headlight, which would cause the indicator to be constantly on when headlight is on, even while indicator change over is flashing. That is unless we don't care if it flashes or not if the headlight is on? I guess that's an OP clarification.
    • HI, Ive got an r34 gtt sedan A/T. The instrument cluster went out and I replaced it with another A/T everything visually looks the same and all the gauges work now with the exception of the speedometer and odometer. The speedo will stay pinned at zero until I'm going about 55kmh and then it'll say Im going about 5kmh. my odometer seems to be tracking at about a 1/10 of what it should. If I go 1km it'll say I've only gone 0.01. Appreciate any and all help. Ive tried searching through the forums reddit and a local fb group. The only info I think I've found is that some cars didnt come equipped with TCS (mind is) and the clusters may be different between those? I've also installed a brand new VSS and no joy obviously. TIA. 
    • what speedo healer did you use?  
    • Certainly. It is probably broken under the wire style clamp. At least that one is easier to get at than the front one.   Sounds like it isn't a major leak, I'd start with backing off the the water feed and return banjos into the turbos half a turn then tightening properly. Hardlines can still crack over time, either in the tube (particularly when turbos are changed if the banjo is siezed in the the tube) or at the brazed joins between the lines and the banjo fittings. A coolant system pressure test will reveal all. BTW you'd be able to get a sump without exchange, it will just cost more as they will have to source another stock one for the next customer. If you want to address the sump a much better option is something like this https://www.hioctanedirect.com/hi-octane-racing-sump-extension-nissan-rb26 that you weld in locally (and add the oil return fittings at the same time)
    • Pretty sure you are thinking of the throwout bearing there (which you should change when you change your clutch), when they are worn they will get quieter if you put your foot on the clutch. An input shaft bearing is turning/noisy at all times.
×
×
  • Create New...