Jump to content
SAU Community

Recommended Posts

ok cut a long story short.

rb25det 350rwhp 20psi kkr480 turbo done 50,000kms or so since new.

ive been running no bov for pretty much the whole 50,000kms.

ive notice last few months if i bring it on boost 20psi and as soon as i back off it will dump some oil out the rear, wont do it driving normally or idling.. just after a big compressor surge ...

if fitted up a greddy bov just before throttle body. anyway basically its stoped the oil dump after a big decel from what i could see atleast.

could the compressor surge be causing the oil 2 get past the seals and out the exhaust?

i hate bov's i really really do..id rather not run one.. car seems 2 come on alot harder/better without any bov..

i just get fu k ed off with the oil smoke after a i get into it. embarrasing haha.

any ideas? or could it be my motor?

Edited by l0WRB
Link to comment
https://www.sau.com.au/forums/topic/295099-turbo-or-motor/
Share on other sites

If you have in and out shaft play then it is the turbo. Or check oil drain pipe make sure its not kinked and engine is not over filled.

engine is not over full, only done oil change 200kms ago.

oil return line isnt kinked either.

took 4 a spin just before tightened the bov right up.

20psi right under it and backoff it dropped a puff of oil smoke hrmm

Link to comment
https://www.sau.com.au/forums/topic/295099-turbo-or-motor/#findComment-4922217
Share on other sites

Could it be the PCV or crank case breather? Are you running a catch can?

There is a lot of manifold vacuum at close of throttle, it could be related to that.

PCV isnt hooked up

breathers are running back into the intake pipe.

Link to comment
https://www.sau.com.au/forums/topic/295099-turbo-or-motor/#findComment-4922265
Share on other sites

PCV isnt hooked up

breathers are running back into the intake pipe.

Get a catch can on it. My RB25/30 was dumping alot of oil out the breathers on back off on the dyno...

Also found it severly breathing oil on the track though too...

Link to comment
https://www.sau.com.au/forums/topic/295099-turbo-or-motor/#findComment-4922362
Share on other sites

Get a catch can on it. My RB25/30 was dumping alot of oil out the breathers on back off on the dyno...

Also found it severly breathing oil on the track though too...

yes mine also breaths heavy after a good thrashing or on dyno..

mite get a bit of oil in intake and front cover of turbo after 5000kms and hard thrashing

mite try just venting the breather with a filter.

just the smell annoys me smelling it breathe

Link to comment
https://www.sau.com.au/forums/topic/295099-turbo-or-motor/#findComment-4922466
Share on other sites

yes mine also breaths heavy after a good thrashing or on dyno..

mite get a bit of oil in intake and front cover of turbo after 5000kms and hard thrashing

mite try just venting the breather with a filter.

just the smell annoys me smelling it breathe

Put a catch can on, and plumb it all in properly.

This is what they're for!

Link to comment
https://www.sau.com.au/forums/topic/295099-turbo-or-motor/#findComment-4922523
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

    • New CAS just turned up from NZ Wiring. Looks like a nice bit of gear.  So, yeah. Triggered, bro. Realised I may as well do the cam belt while mucking about with it so will order one of them.
    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
×
×
  • Create New...